* ext/tk/lib/tk/*: untabify

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@7029 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

70 files changed, 1104 insertions, 1104 deletions

diff --git a/ext/tk/sample/tkextlib/ICONS/viewIcons.rb b/ext/tk/sample/tkextlib/ICONS/viewIcons.rb
index fa8741f41..fc88eb5c8 100644
--- a/ext/tk/sample/tkextlib/ICONS/viewIcons.rb
+++ b/ext/tk/sample/tkextlib/ICONS/viewIcons.rb
@@ -28,17 +28,17 @@ class ViewIcons
     ent_groups  = TkEntry.new(base, :width=>50, :textvariable=>@groups)
 
     btn_browse = TkButton.new(base, :text=>'Browse', 
-			            :command=>method(:select_icons))
+                                    :command=>method(:select_icons))
     btn_view   = TkButton.new(base, :text=>'View',
-			            :command=>method(:display_icons))
+                                    :command=>method(:display_icons))
     btn_exit   = TkButton.new(base, :text=>'Exit', :command=>proc{exit})
 
     @column_btns = {}
     6.step(20, 2){|i|
       @column_btns[i] = TkButton.new(columns, 
-				     :text=>i.to_s, :width=>2, 
-				     :command=>proc{set_columns(i)}
-				     ).pack(:side=>:left)
+                                     :text=>i.to_s, :width=>2, 
+                                     :command=>proc{set_columns(i)}
+                                     ).pack(:side=>:left)
     }
     @column_btns[@columns][:relief] = :sunken
 
@@ -91,15 +91,15 @@ class ViewIcons
 
   def _create_info_window
     @info_window = TkToplevel.new(:background=>'lightyellow', :borderwidth=>1, 
-				  :relief=>:solid){|w|
+                                  :relief=>:solid){|w|
       lbl_name = TkLabel.new(w, :text=>'Name', :background=>'lightyellow', 
-			     :font=>@boldfont, :justify=>:left)
+                             :font=>@boldfont, :justify=>:left)
       lbl_grps = TkLabel.new(w, :text=>'Groups', :background=>'lightyellow', 
-			     :font=>@boldfont, :justify=>:left)
+                             :font=>@boldfont, :justify=>:left)
       lbl_type = TkLabel.new(w, :text=>'Type', :background=>'lightyellow', 
-			     :font=>@boldfont, :justify=>:left)
+                             :font=>@boldfont, :justify=>:left)
       lbl_size = TkLabel.new(w, :text=>'Size', :background=>'lightyellow', 
-			     :font=>@boldfont, :justify=>:left)
+                             :font=>@boldfont, :justify=>:left)
 
       lbl_name.grid(:row=>0, :column=>0, :sticky=>:w)
       lbl_grps.grid(:row=>1, :column=>0, :sticky=>:w)
@@ -117,16 +117,16 @@ class ViewIcons
       @size.grid(:row=>3, :column=>1, :sticky=>:w)
 
       def name(txt)
-	@name['text'] = txt
+        @name['text'] = txt
       end
       def groups(txt)
-	@grps['text'] = txt
+        @grps['text'] = txt
       end
       def type(txt)
-	@type['text'] = txt
+        @type['text'] = txt
       end
       def size(txt)
-	@size['text'] = txt
+        @size['text'] = txt
       end
 
       overrideredirect(true)
@@ -243,9 +243,9 @@ class ViewIcons
 
     if Tk::PLATFORM['platform'] == 'unix'
       TkSelection.handle(Tk.root, method(:primary_transfer), 
-			 :selection=>'PRIMARY')
+                         :selection=>'PRIMARY')
       TkSelection.set_owner(Tk.root, :selection=>'PRIMARY', 
-			    :command=>method(:lost_selection))
+                            :command=>method(:lost_selection))
     end
 
     Tk.bell
@@ -257,18 +257,18 @@ class ViewIcons
     width = @controls.winfo_width - @icons_window.yscrollbar.winfo_width - 8
 
     @icons_window.configure(:width=>width, :scrollregion=>bbox, 
-			    :xscrollincrement=>'0.1i', 
-			    :yscrollincrement=>'0.1i')
+                            :xscrollincrement=>'0.1i', 
+                            :yscrollincrement=>'0.1i')
   end
 
   def select_icons
     new_lib = Tk.getOpenFile(:initialdir=>@initial_dir, 
-			     :initialfile=>'tkIcons', 
-			     :title=>'Select Icon Library', 
-			     :filetypes=>[
-			       ['Icon Libraries', ['tkIcons*']], 
-			       ['All Files', ['*']]
-			     ])
+                             :initialfile=>'tkIcons', 
+                             :title=>'Select Icon Library', 
+                             :filetypes=>[
+                               ['Icon Libraries', ['tkIcons*']], 
+                               ['All Files', ['*']]
+                             ])
 
     @library.value = new_lib if new_lib.length != 0
     display_icons
@@ -281,7 +281,7 @@ class ViewIcons
 
     unless File.exist?(@library.value)
       Tk.messageBox(:icon=>'warning', :message=>'File does not exist', 
-		    :title=>'viewIcons')
+                    :title=>'viewIcons')
       return
     end
 
@@ -306,10 +306,10 @@ class ViewIcons
       init_info(lbl, name)
 
       if column == limit
-	column = 0
-	row += 1
+        column = 0
+        row += 1
       else
-	column += 1
+        column += 1
       end
     }
 
diff --git a/ext/tk/sample/tkextlib/bwidget/basic.rb b/ext/tk/sample/tkextlib/bwidget/basic.rb
index f622c142e..c1521651f 100644
--- a/ext/tk/sample/tkextlib/bwidget/basic.rb
+++ b/ext/tk/sample/tkextlib/bwidget/basic.rb
@@ -30,37 +30,37 @@ module DemoBasic
 
   def self._label(parent)
     lab = Tk::BWidget::Label.new(parent, :text=>'This is a Label widget', 
-				 :helptext=>'Label widget')
+                                 :helptext=>'Label widget')
     chk = TkCheckbutton.new(parent, :text=>'Disabled', 
-			    :variable=>@@var.ref(lab, 'state'), 
-			    :onvalue=>'disabled', :offvalue=>'normal', 
-			    :command=>proc{lab[:state] = @@var[lab, 'state']})
+                            :variable=>@@var.ref(lab, 'state'), 
+                            :onvalue=>'disabled', :offvalue=>'normal', 
+                            :command=>proc{lab[:state] = @@var[lab, 'state']})
     lab.pack(:anchor=>:w, :pady=>4)
     chk.pack(:anchor=>:w)
   end
 
   def self._entry(parent)
     ent = Tk::BWidget::Entry.new(parent, :text=>'Press enter', 
-				 :helptext=>'Entry widtet', 
-				 :command=>proc{
-				   @@var['entcmd'] = 'command called'
-				   Tk.after(500, proc{@@var['entcmd'] = ''})
-				 })
+                                 :helptext=>'Entry widtet', 
+                                 :command=>proc{
+                                   @@var['entcmd'] = 'command called'
+                                   Tk.after(500, proc{@@var['entcmd'] = ''})
+                                 })
 
     chk1 = TkCheckbutton.new(parent, :text=>'Disabled', 
-			     :variable=>@@var.ref(ent, 'state'), 
-			     :onvalue=>'disabled', :offvalue=>'normal', 
-			     :command=>proc{ent.state = @@var[ent, 'state']})
+                             :variable=>@@var.ref(ent, 'state'), 
+                             :onvalue=>'disabled', :offvalue=>'normal', 
+                             :command=>proc{ent.state = @@var[ent, 'state']})
 
     chk2 = TkCheckbutton.new(parent, :text=>'Non editable', 
-			     :variable=>@@var.ref(ent, 'editable'), 
-			     :onvalue=>false, :offvalue=>true, 
-			     :command=>proc{
-			       ent.editable = @@var[ent, 'editable']
-			     })
+                             :variable=>@@var.ref(ent, 'editable'), 
+                             :onvalue=>false, :offvalue=>true, 
+                             :command=>proc{
+                               ent.editable = @@var[ent, 'editable']
+                             })
 
     lab = TkLabel.new(parent, :textvariable=>@@var.ref('entcmd'), 
-		      :foreground=>'red')
+                      :foreground=>'red')
 
     ent.pack(:pady=>4, :anchor=>:w)
     Tk.pack(chk1, chk2, :anchor=>:w)
@@ -70,22 +70,22 @@ module DemoBasic
   def self._button(parent)
     frame = TkFrame.new(parent)
     but  = Tk::BWidget::Button.new(frame, :text=>'Press me!', 
-				   :repeatdelay=>300, 
-				   :command=>proc{_butcmd('command')}, 
-				   :helptext=>'This is a Button widget')
+                                   :repeatdelay=>300, 
+                                   :command=>proc{_butcmd('command')}, 
+                                   :helptext=>'This is a Button widget')
 
     sep1 = Tk::BWidget::Separator.new(frame, :orient=>:vertical)
     arr1 = Tk::BWidget::ArrowButton.new(frame, :type=>:button, 
-		:width=>25, :height=>25, :repeatdelay=>300, 
-		:command=>proc{_butcmd('command')}, 
-		:helptext=>"This is an ArrowButton widget\nof type button")
+                :width=>25, :height=>25, :repeatdelay=>300, 
+                :command=>proc{_butcmd('command')}, 
+                :helptext=>"This is an ArrowButton widget\nof type button")
 
     sep2 = Tk::BWidget::Separator.new(frame, :orient=>:vertical)
     arr2 = Tk::BWidget::ArrowButton.new(frame, :type=>:arrow, 
-		:width=>25, :height=>25, :relief=>:sunken, 
-		:ipadx=>0, :ipady=>0, :repeatdelay=>300, 
-		:command=>proc{_butcmd('command')}, 
-		:helptext=>"This is an ArrowButton widget\nof type arrow")
+                :width=>25, :height=>25, :relief=>:sunken, 
+                :ipadx=>0, :ipady=>0, :repeatdelay=>300, 
+                :command=>proc{_butcmd('command')}, 
+                :helptext=>"This is an ArrowButton widget\nof type arrow")
 
     but.pack(:side=>:left, :padx=>4)
     sep1.pack(:side=>:left, :padx=>4, :fill=>:y)
@@ -95,51 +95,51 @@ module DemoBasic
     frame.pack
 
     Tk::BWidget::Separator.new(parent, 
-			       :orient=>:horizontal).pack(:fill=>:x, :pady=>10)
+                               :orient=>:horizontal).pack(:fill=>:x, :pady=>10)
 
     labf1 = Tk::BWidget::LabelFrame.new(parent, :text=>'Command', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>1)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>1)
     subf = labf1.get_frame
     chk1 = TkCheckbutton.new(subf, :text=>'Disabled', 
-			     :variable=>@@var.ref('bstate'), 
-			     :onvalue=>'disabled', :offvalue=>'normal', 
-			     :command=>proc{_bstate(@@var['bstate'], 
-						     but, arr1, arr2)})
+                             :variable=>@@var.ref('bstate'), 
+                             :onvalue=>'disabled', :offvalue=>'normal', 
+                             :command=>proc{_bstate(@@var['bstate'], 
+                                                     but, arr1, arr2)})
     chk2 = TkCheckbutton.new(subf, :text=>"Use armcommand/\ndisarmcommand", 
-			     :variable=>@@var.ref('barmcmd'), 
-			     :command=>proc{_barmcmd(@@var['barmcmd'], 
-						     but, arr1, arr2)})
+                             :variable=>@@var.ref('barmcmd'), 
+                             :command=>proc{_barmcmd(@@var['barmcmd'], 
+                                                     but, arr1, arr2)})
     Tk.pack(chk1, chk2, :anchor=>:w)
 
     label = TkLabel.new(parent, :textvariable=>@@var.ref('butcmd'), 
-			:foreground=>'red').pack(:side=>:bottom, :pady=>4)
+                        :foreground=>'red').pack(:side=>:bottom, :pady=>4)
 
     labf2 = Tk::BWidget::LabelFrame.new(parent, :text=>'Direction', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>1)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>1)
     subf = labf2.get_frame
     @@var['bside'] = :top
     [:top, :left, :bottom, :right].each{|dir|
       TkRadiobutton.new(subf, :text=>"#{dir} arrow", 
-			:variable=>@@var.ref('bside'), :value=>dir, 
-			:command=>proc{_bside(@@var['bside'], arr1, arr2)}
-			).pack(:anchor=>:w)
+                        :variable=>@@var.ref('bside'), :value=>dir, 
+                        :command=>proc{_bside(@@var['bside'], arr1, arr2)}
+                        ).pack(:anchor=>:w)
     }
 
     labf3 = Tk::BWidget::LabelFrame.new(parent, :text=>'Relief', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>1)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>1)
     subf = labf3.get_frame
     @@var['brelief'] = :raised
     [ %w(raised sunken ridge groove), %w(flat solid link)].each{|lrelief|
       f = TkFrame.new(subf)
       lrelief.each{|relief|
-	TkRadiobutton.new(f, :text=>relief, 
-			  :variable=>@@var.ref('brelief'), :value=>relief, 
-			  :command=>proc{
-			    _brelief(@@var['brelief'], but, arr1, arr2)
-			  }).pack(:anchor=>:w)
+        TkRadiobutton.new(f, :text=>relief, 
+                          :variable=>@@var.ref('brelief'), :value=>relief, 
+                          :command=>proc{
+                            _brelief(@@var['brelief'], but, arr1, arr2)
+                          }).pack(:anchor=>:w)
       }
       f.pack(:side=>:left, :padx=>2, :anchor=>:n)
     }
@@ -164,19 +164,19 @@ module DemoBasic
   def self._barmcmd(value, but, arr1, arr2)
     if TkComm.bool(value)
       but.configure(:armcommand=>proc{_butcmd('arm')}, 
-		    :disarmcommand=>proc{_butcmd('disarm')}, 
-		    :command=>'')
+                    :disarmcommand=>proc{_butcmd('disarm')}, 
+                    :command=>'')
       [arr1, arr2].each{|arr|
-	arr.configure(:armcommand=>proc{_butcmd('arm')}, 
-		      :disarmcommand=>proc{_butcmd('disarm')}, 
-		      :command=>'')
+        arr.configure(:armcommand=>proc{_butcmd('arm')}, 
+                      :disarmcommand=>proc{_butcmd('disarm')}, 
+                      :command=>'')
       }
     else
       but.configure(:armcommand=>'', :disarmcommand=>'', 
-		    :command=>proc{_butcmd('command')})
+                    :command=>proc{_butcmd('command')})
       [arr1, arr2].each{|arr|
-	arr.configure(:armcommand=>'', :disarmcommand=>'', 
-		      :command=>proc{_butcmd('command')})
+        arr.configure(:armcommand=>'', :disarmcommand=>'', 
+                      :command=>proc{_butcmd('command')})
       }
     end
   end
diff --git a/ext/tk/sample/tkextlib/bwidget/demo.rb b/ext/tk/sample/tkextlib/bwidget/demo.rb
index e192cd636..785d2681a 100644
--- a/ext/tk/sample/tkextlib/bwidget/demo.rb
+++ b/ext/tk/sample/tkextlib/bwidget/demo.rb
@@ -54,26 +54,26 @@ class BWidget_Demo
 
     descmenu = [
       '&File', 'all', 'file', 0, [
-	['command', 'E&xit', [], 'Exit BWidget demo', [], 
-	  {:command=>proc{exit}}]
+        ['command', 'E&xit', [], 'Exit BWidget demo', [], 
+          {:command=>proc{exit}}]
       ], 
       '&Options', 'all', 'options', 0, [
-	['checkbutton', 'Toolbar &1', ['all', 'option'], 
-	  'Show/hide toolbar 1', [], 
-	  { :variable=>DemoVar.toolbar1, 
-	    :command=>proc{
-	      DemoVar.mainframe.show_toolbar(0, DemoVar.toolbar1.value)
-	    }
-	  }
-	], 
-	['checkbutton', 'Toolbar &2', ['all', 'option'], 
-	  'Show/hide toolbar 2', [], 
-	  { :variable=>DemoVar.toolbar2, 
-	    :command=>proc{
-	      DemoVar.mainframe.show_toolbar(1, DemoVar.toolbar2.value)
-	    }
-	  }
-	]
+        ['checkbutton', 'Toolbar &1', ['all', 'option'], 
+          'Show/hide toolbar 1', [], 
+          { :variable=>DemoVar.toolbar1, 
+            :command=>proc{
+              DemoVar.mainframe.show_toolbar(0, DemoVar.toolbar1.value)
+            }
+          }
+        ], 
+        ['checkbutton', 'Toolbar &2', ['all', 'option'], 
+          'Show/hide toolbar 2', [], 
+          { :variable=>DemoVar.toolbar2, 
+            :command=>proc{
+              DemoVar.mainframe.show_toolbar(1, DemoVar.toolbar2.value)
+            }
+          }
+        ]
       ]
     ]
 
@@ -81,63 +81,63 @@ class BWidget_Demo
     DemoVar.prgindic.value = 0
 
     DemoVar.mainframe = Tk::BWidget::MainFrame.new(
-				:menu=>descmenu, 
-				:textvariable=>DemoVar.status, 
-				:progressvar=>DemoVar.prgindic
-			)
+                                :menu=>descmenu, 
+                                :textvariable=>DemoVar.status, 
+                                :progressvar=>DemoVar.prgindic
+                        )
 
     # toobar 1 creation
     DemoVar.prgindic.numeric += 1
 
     DemoVar.mainframe.add_toolbar{|tb1|
       Tk::BWidget::ButtonBox.new(tb1, :spacing=>0, :padx=>1, :pady=>1){|bbox|
-	add(:image=>Tk::BWidget::Bitmap.new('new'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Create a new file" icon'}, 
-	    :helptext=>"Create a new file")
-
-	add(:image=>Tk::BWidget::Bitmap.new('open'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Open an existing file" icon'}, 
-	    :helptext=>"Open an existing file")
-
-	add(:image=>Tk::BWidget::Bitmap.new('save'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Save file" icon'}, 
-	    :helptext=>"Save file")
-
-	pack(:side=>:left, :anchor=>:w)
+        add(:image=>Tk::BWidget::Bitmap.new('new'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Create a new file" icon'}, 
+            :helptext=>"Create a new file")
+
+        add(:image=>Tk::BWidget::Bitmap.new('open'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Open an existing file" icon'}, 
+            :helptext=>"Open an existing file")
+
+        add(:image=>Tk::BWidget::Bitmap.new('save'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Save file" icon'}, 
+            :helptext=>"Save file")
+
+        pack(:side=>:left, :anchor=>:w)
       }
 
       Tk::BWidget::Separator.new(tb1, :orient=>:vertical){
-	pack(:side=>:left, :fill=>:y, :padx=>4, :anchor=>:w)
+        pack(:side=>:left, :fill=>:y, :padx=>4, :anchor=>:w)
       }
 
       DemoVar.prgindic.numeric += 1
 
       Tk::BWidget::ButtonBox.new(tb1, :spacing=>0, :padx=>1, :pady=>1){|bbox|
-	add(:image=>Tk::BWidget::Bitmap.new('cut'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Cut selection" icon'}, 
-	    :helptext=>"Cut selection")
-
-	add(:image=>Tk::BWidget::Bitmap.new('copy'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Copy selection" icon'}, 
-	    :helptext=>"Copy selection")
-
-	add(:image=>Tk::BWidget::Bitmap.new('paste'), 
-	    :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
-	    :borderwidth=>1, :padx=>1, :pady=>1, 
-	    :command=>proc{puts 'select "Paste selection" icon'}, 
-	    :helptext=>"Paste selection")
-
-	pack(:side=>:left, :anchor=>:w)
+        add(:image=>Tk::BWidget::Bitmap.new('cut'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Cut selection" icon'}, 
+            :helptext=>"Cut selection")
+
+        add(:image=>Tk::BWidget::Bitmap.new('copy'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Copy selection" icon'}, 
+            :helptext=>"Copy selection")
+
+        add(:image=>Tk::BWidget::Bitmap.new('paste'), 
+            :highlightthickness=>0, :takefocus=>0, :relief=>:link, 
+            :borderwidth=>1, :padx=>1, :pady=>1, 
+            :command=>proc{puts 'select "Paste selection" icon'}, 
+            :helptext=>"Paste selection")
+
+        pack(:side=>:left, :anchor=>:w)
       }
     }
 
@@ -147,7 +147,7 @@ class BWidget_Demo
     tb2 = DemoVar.mainframe.add_toolbar
     DemoVar._wfont = Tk::BWidget::SelectFont::Toolbar.new(tb2, 
                        :command=>proc{update_font(DemoVar._wfont[:font])}
-		     )
+                     )
     DemoVar.font = DemoVar._wfont[:font]
     DemoVar._wfont.pack(:side=>:left, :anchor=>:w)
 
@@ -214,18 +214,18 @@ class BWidget_Demo
     top.overrideredirect(true)
 
     ximg  = TkLabel.new(top, :bitmap=>"@#{File.join(DEMODIR,'x1.xbm')}", 
-			:foreground=>'grey90', :background=>'white')
+                        :foreground=>'grey90', :background=>'white')
     bwimg = TkLabel.new(ximg, :bitmap=>"@#{File.join(DEMODIR,'bwidget.xbm')}",
-			:foreground=>'grey90', :background=>'white')
+                        :foreground=>'grey90', :background=>'white')
     frame = TkFrame.new(ximg, :background=>'white')
     TkLabel.new(frame, :text=>'Loading demo', 
-		:background=>'white', :font=>'times 8').pack
+                :background=>'white', :font=>'times 8').pack
     TkLabel.new(frame, :textvariable=>DemoVar.prgtext, 
-		:background=>'white', :font=>'times 8', :width=>35).pack
+                :background=>'white', :font=>'times 8', :width=>35).pack
     Tk::BWidget::ProgressBar.new(frame, :width=>50, :height=>10, 
-				 :background=>'white', 
-				 :variable=>DemoVar.prgindic, 
-				 :maximum=>10).pack
+                                 :background=>'white', 
+                                 :variable=>DemoVar.prgindic, 
+                                 :maximum=>10).pack
     frame.place(:x=>0, :y=>0, :anchor=>:nw)
     bwimg.place(:relx=>1, :rely=>1, :anchor=>:se)
     ximg.pack
diff --git a/ext/tk/sample/tkextlib/bwidget/dnd.rb b/ext/tk/sample/tkextlib/bwidget/dnd.rb
index fd6cc40dd..1c8b03653 100644
--- a/ext/tk/sample/tkextlib/bwidget/dnd.rb
+++ b/ext/tk/sample/tkextlib/bwidget/dnd.rb
@@ -13,19 +13,19 @@ module DemoDnD
     subf = titf1.get_frame
 
     ent1 = Tk::BWidget::LabelEntry.new(subf, :label=>'Entry', 
-				       :labelwidth=>14, :dragenabled=>true, 
-				       :dragevent=>3)
+                                       :labelwidth=>14, :dragenabled=>true, 
+                                       :dragevent=>3)
     labf1 = Tk::BWidget::LabelFrame.new(subf, :text=>'Label (text)', 
-					:width=>14)
+                                        :width=>14)
     f = labf1.get_frame
     lab = Tk::BWidget::Label.new(f, :text=>'Drag this text', 
-				 :dragenabled=>true, :dragevent=>3).pack
+                                 :dragenabled=>true, :dragevent=>3).pack
 
     labf2 = Tk::BWidget::LabelFrame.new(subf, :text=>'Label (bitmap)', 
-					:width=>14)
+                                        :width=>14)
     f = labf2.get_frame
     lab = Tk::BWidget::Label.new(f, :bitmap=>'info', 
-				 :dragenabled=>true, :dragevent=>3).pack
+                                 :dragenabled=>true, :dragevent=>3).pack
 
     Tk.pack(ent1, labf1, labf2, :side=>:top, :fill=>:x, :pady=>4)
 
@@ -33,11 +33,11 @@ module DemoDnD
     subf = titf2.get_frame
 
     ent1 = Tk::BWidget::LabelEntry.new(subf, :label=>'Entry', 
-				       :labelwidth=>14, :dropenabled=>true)
+                                       :labelwidth=>14, :dropenabled=>true)
     labf1 = Tk::BWidget::LabelFrame.new(subf, :text=>'Label', :width=>14)
     f = labf1.get_frame
     lab = Tk::BWidget::Label.new(f, :dropenabled=>true, 
-				 :highlightthickness=>1).pack(:fill=>:x)
+                                 :highlightthickness=>1).pack(:fill=>:x)
     Tk.pack(ent1, labf1, :side=>:top, :fill=>:x, :pady=>4)
     Tk.pack(titf1, titf2, :pady=>4)
 
diff --git a/ext/tk/sample/tkextlib/bwidget/manager.rb b/ext/tk/sample/tkextlib/bwidget/manager.rb
index 65bbe0f9e..776cb3065 100644
--- a/ext/tk/sample/tkextlib/bwidget/manager.rb
+++ b/ext/tk/sample/tkextlib/bwidget/manager.rb
@@ -33,34 +33,34 @@ module DemoManager
 
   def self._mainframe(parent)
     labf1 = Tk::BWidget::LabelFrame.new(parent, :text=>'Toolbar', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>2)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>2)
     subf = labf1.get_frame
     chk1 = TkCheckbutton.new(subf, :text=>'View toolbar 1', 
-			     :variable=>DemoVar.toolbar1, 
-			     :command=>proc{
-			       DemoVar.mainframe.show_toolbar(
-				  0, DemoVar.toolbar1.value
-			       )
-			     })
+                             :variable=>DemoVar.toolbar1, 
+                             :command=>proc{
+                               DemoVar.mainframe.show_toolbar(
+                                  0, DemoVar.toolbar1.value
+                               )
+                             })
     chk2 = TkCheckbutton.new(subf, :text=>'View toolbar 2', 
-			     :variable=>DemoVar.toolbar2, 
-			     :command=>proc{
-			       DemoVar.mainframe.show_toolbar(
-				  1, DemoVar.toolbar2.value
-			       )
-			     })
+                             :variable=>DemoVar.toolbar2, 
+                             :command=>proc{
+                               DemoVar.mainframe.show_toolbar(
+                                  1, DemoVar.toolbar2.value
+                               )
+                             })
 
     Tk.pack(chk1, chk2, :anchor=>:w, :fill=>:x)
     labf1.pack(:fill=>:both)
 
     labf2 = Tk::BWidget::LabelFrame.new(parent, :text=>'Status bar', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>2)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>2)
     subf = labf2.get_frame
     chk1 = TkCheckbutton.new(subf, :text=>"Show Progress\nindicator", 
-			     :justify=>:left, :variable=>@@progress, 
-			     :command=>proc{ _show_progress })
+                             :justify=>:left, :variable=>@@progress, 
+                             :command=>proc{ _show_progress })
     chk1.pack(:anchor=>:w, :fill=>:x)
 
     Tk.pack(labf1, labf2, :side=>:left, :padx=>4, :fill=>:both)
@@ -68,10 +68,10 @@ module DemoManager
 
   def self._notebook(parent)
     TkCheckbutton.new(parent, :text=>'Homogeneous label', 
-		      :variable=>@@homogeneous, 
-		      :command=>proc{
-			DemoVar.notebook[:homogeneous] = @@homogeneous.value
-		      }).pack(:side=>:left, :anchor=>:n, :fill=>:x)
+                      :variable=>@@homogeneous, 
+                      :command=>proc{
+                        DemoVar.notebook[:homogeneous] = @@homogeneous.value
+                      }).pack(:side=>:left, :anchor=>:n, :fill=>:x)
   end
 
   def self._paned(parent)
@@ -93,15 +93,15 @@ module DemoManager
     }
 
     sw = Tk::BWidget::ScrolledWindow.new(pane3, :relief=>:sunken, 
-					 :borderwidth=>2)
+                                         :borderwidth=>2)
     sf = Tk::BWidget::ScrollableFrame.new(sw)
     sw.set_widget(sf)
     subf = sf.get_frame
     lab = TkLabel.new(subf, :text=>'This is a ScrollableFrame')
     chk = TkCheckbutton.new(subf, :text=>'Constrained with', 
-			    :variable=>@@constw, :command=>proc{
-			      sf['constrainedwidth'] = @@constw.value
-			    })
+                            :variable=>@@constw, :command=>proc{
+                              sf['constrainedwidth'] = @@constw.value
+                            })
     lab.pack
     chk.pack(:anchor=>:w)
     chk.bind('FocusIn', proc{sf.see(chk)})
@@ -133,13 +133,13 @@ module DemoManager
   def self._update_progress
     if @@progress.bool
       if DemoVar.prgindic.numeric < 100
-	DemoVar.prgindic.numeric += 5
+        DemoVar.prgindic.numeric += 5
       else
-	@@progress.value = false
-	DemoVar.mainframe.show_statusbar(:status)
-	DemoVar.status.value = 'Done'
-	@@afterobj.stop
-	Tk.after(500, proc{ DemoVar.status.value = '' })
+        @@progress.value = false
+        DemoVar.mainframe.show_statusbar(:status)
+        DemoVar.status.value = 'Done'
+        @@afterobj.stop
+        Tk.after(500, proc{ DemoVar.status.value = '' })
       end
     else
       @@afterobj.stop
diff --git a/ext/tk/sample/tkextlib/bwidget/select.rb b/ext/tk/sample/tkextlib/bwidget/select.rb
index a04d8da48..ea24b47e2 100644
--- a/ext/tk/sample/tkextlib/bwidget/select.rb
+++ b/ext/tk/sample/tkextlib/bwidget/select.rb
@@ -14,30 +14,30 @@ module DemoSelect
     titf1 = Tk::BWidget::TitleFrame.new(frame, :text=>'SpinBox')
     subf = titf1.get_frame
     spin = Tk::BWidget::SpinBox.new(subf, :range=>[1, 100, 1], 
-				    :textvariable=>@@var.ref('spin', 'var'), 
-				    :helptext=>'This is the SpinBox')
+                                    :textvariable=>@@var.ref('spin', 'var'), 
+                                    :helptext=>'This is the SpinBox')
     ent = Tk::BWidget::LabelEntry.new(subf, :label=>'Linked var', 
-				      :labelwidth=>10, :labelanchor=>:w,  
-				      :textvariable=>@@var.ref('spin', 'var'), 
-				      :editable=>0, 
-				      :helptext=>"This is an Entry reflecting\nthe linked var of SpinBox")
+                                      :labelwidth=>10, :labelanchor=>:w,  
+                                      :textvariable=>@@var.ref('spin', 'var'), 
+                                      :editable=>0, 
+                                      :helptext=>"This is an Entry reflecting\nthe linked var of SpinBox")
     labf = Tk::BWidget::LabelFrame.new(subf, :text=>'Options', 
-				       :side=>:top, :anchor=>:w, 
-				       :relief=>:sunken, :borderwidth=>1, 
-				       :helptext=>'Modify some options of SpinBox')
+                                       :side=>:top, :anchor=>:w, 
+                                       :relief=>:sunken, :borderwidth=>1, 
+                                       :helptext=>'Modify some options of SpinBox')
     subf = labf.get_frame
     chk1 = TkCheckbutton.new(subf, :text=>'Non editable', 
-			     :variable=>@@var.ref('spin', 'editable'), 
-			     :onvalue=>false, :offvalue=>true, 
-			     :command=>proc{
-			       spin.editable(@@var['spin', 'editable'])
-			     })
+                             :variable=>@@var.ref('spin', 'editable'), 
+                             :onvalue=>false, :offvalue=>true, 
+                             :command=>proc{
+                               spin.editable(@@var['spin', 'editable'])
+                             })
     chk2 = TkCheckbutton.new(subf, :text=>'Disabled', 
-			     :variable=>@@var.ref('spin', 'state'), 
-			     :onvalue=>'disabled', :offvalue=>'normal', 
-			     :command=>proc{
-			       spin.state(@@var['spin', 'state'])
-			     })
+                             :variable=>@@var.ref('spin', 'state'), 
+                             :onvalue=>'disabled', :offvalue=>'normal', 
+                             :command=>proc{
+                               spin.state(@@var['spin', 'state'])
+                             })
     Tk.pack(chk1, chk2, :side=>:left, :anchor=>:w)
     Tk.pack(spin, ent, labf, :pady=>4, :fill=>:x)
     titf1.pack
@@ -45,33 +45,33 @@ module DemoSelect
     titf2 = Tk::BWidget::TitleFrame.new(frame, :text=>'ComboBox')
     subf = titf2.get_frame
     combo = Tk::BWidget::ComboBox.new(subf,
-				      :textvariable=>@@var.ref('combo', 'var'),
-				      :values=>[
-					'first value', 'second value', 
-					'third value', 'fourth value', 
-					'fifth value'
-				      ], 
-				      :helptext=>'This is the ComboBox')
+                                      :textvariable=>@@var.ref('combo', 'var'),
+                                      :values=>[
+                                        'first value', 'second value', 
+                                        'third value', 'fourth value', 
+                                        'fifth value'
+                                      ], 
+                                      :helptext=>'This is the ComboBox')
     ent = Tk::BWidget::LabelEntry.new(subf, :label=>'Linked var', 
-				      :labelwidth=>10, :labelanchor=>:w, 
-				      :textvariable=>@@var.ref('combo', 'var'),
-				      :editable=>0, :helptext=>"This is an Entry reflecting\nthe linked var of ComboBox")
+                                      :labelwidth=>10, :labelanchor=>:w, 
+                                      :textvariable=>@@var.ref('combo', 'var'),
+                                      :editable=>0, :helptext=>"This is an Entry reflecting\nthe linked var of ComboBox")
     labf = Tk::BWidget::LabelFrame.new(subf, :text=>'Options', :side=>:top, 
-				       :anchor=>:w, :relief=>:sunken, 
-				       :borderwidth=>1, :helptext=>'Modify some options of ComboBox')
+                                       :anchor=>:w, :relief=>:sunken, 
+                                       :borderwidth=>1, :helptext=>'Modify some options of ComboBox')
     subf = labf.get_frame
     chk1 = TkCheckbutton.new(subf, :text=>'Non editable', 
-			     :variable=>@@var.ref('combo', 'editable'), 
-			     :onvalue=>false, :offvalue=>true, 
-			     :command=>proc{
-			       combo.editable(@@var['combo', 'editable'])
-			     })
+                             :variable=>@@var.ref('combo', 'editable'), 
+                             :onvalue=>false, :offvalue=>true, 
+                             :command=>proc{
+                               combo.editable(@@var['combo', 'editable'])
+                             })
     chk2 = TkCheckbutton.new(subf, :text=>'Disabled', 
-			     :variable=>@@var.ref('combo', 'state'), 
-			     :onvalue=>'disabled', :offvalue=>'normal', 
-			     :command=>proc{
-			       combo.state(@@var['combo', 'state'])
-			     })
+                             :variable=>@@var.ref('combo', 'state'), 
+                             :onvalue=>'disabled', :offvalue=>'normal', 
+                             :command=>proc{
+                               combo.state(@@var['combo', 'state'])
+                             })
 
     Tk.pack(chk1, chk2, :side=>:left, :anchor=>:w)
     Tk.pack(combo, ent, labf, :pady=>4, :fill=>:x)
diff --git a/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb b/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
index 1ed84e21a..3d19c8d09 100644
--- a/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
+++ b/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
@@ -24,14 +24,14 @@ module DemoDialog
 
     subf = titf1.get_frame
     cmd = proc{ TkOption.read_file(File.join(Tk::BWidget::LIBRARY, 'lang', 
-					     @@resources.value + '.rc')) }
+                                             @@resources.value + '.rc')) }
     Tk.pack(TkRadiobutton.new(subf, :text=>'English', :value=>'en', 
-			      :variable=>@@resources, :command=>cmd), 
-	    TkRadiobutton.new(subf, :text=>'French', :value=>'fr', 
-			      :variable=>@@resources, :command=>cmd), 
-	    TkRadiobutton.new(subf, :text=>'German', :value=>'de', 
-			      :variable=>@@resources, :command=>cmd), 
-	    :side=>:left)
+                              :variable=>@@resources, :command=>cmd), 
+            TkRadiobutton.new(subf, :text=>'French', :value=>'fr', 
+                              :variable=>@@resources, :command=>cmd), 
+            TkRadiobutton.new(subf, :text=>'German', :value=>'de', 
+                              :variable=>@@resources, :command=>cmd), 
+            :side=>:left)
 
     _tmpldlg(titf2.get_frame)
     _msgdlg(titf3.get_frame)
@@ -47,34 +47,34 @@ module DemoDialog
     @@tmpl['anchor'] = :c
 
     labf1 = Tk::BWidget::LabelFrame.new(parent, :text=>'Button side', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>1)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>1)
     subf = labf1.get_frame
     Tk.pack(TkRadiobutton.new(subf, :text=>'Bottom', :value=>:bottom, 
-			      :variable=>@@tmpl.ref('side'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Left', :value=>:left, 
-			      :variable=>@@tmpl.ref('side'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Right', :value=>:right, 
-			      :variable=>@@tmpl.ref('side'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Top', :value=>:top, 
-			      :variable=>@@tmpl.ref('side'), :anchor=>:w), 
-	    :fill=>:x, :anchor=>:w)
+                              :variable=>@@tmpl.ref('side'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Left', :value=>:left, 
+                              :variable=>@@tmpl.ref('side'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Right', :value=>:right, 
+                              :variable=>@@tmpl.ref('side'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Top', :value=>:top, 
+                              :variable=>@@tmpl.ref('side'), :anchor=>:w), 
+            :fill=>:x, :anchor=>:w)
 
     labf2 = Tk::BWidget::LabelFrame.new(parent, :text=>'Button anchor', 
-					:side=>:top, :anchor=>:w, 
-					:relief=>:sunken, :borderwidth=>1)
+                                        :side=>:top, :anchor=>:w, 
+                                        :relief=>:sunken, :borderwidth=>1)
     subf = labf2.get_frame
     Tk.pack(TkRadiobutton.new(subf, :text=>'North', :value=>:n, 
-			      :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'West', :value=>:w, 
-			      :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'East', :value=>:e, 
-			      :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'South', :value=>:s, 
-			      :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Center', :value=>:c, 
-			      :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
-	    :fill=>:x, :anchor=>:w)
+                              :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'West', :value=>:w, 
+                              :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'East', :value=>:e, 
+                              :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'South', :value=>:s, 
+                              :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Center', :value=>:c, 
+                              :variable=>@@tmpl.ref('anchor'), :anchor=>:w), 
+            :fill=>:x, :anchor=>:w)
 
     sep = Tk::BWidget::Separator.new(parent, :orient=>:horizontal)
     button = TkButton.new(parent, :text=>'Show', :command=>proc{_show_tmpldlg})
@@ -89,44 +89,44 @@ module DemoDialog
     @@msg['icon'] = 'info'
 
     labf1 = Tk::BWidget::LabelFrame.new(parent, :text=>'Type', :side=>:top, 
-					:anchor=>:w, :relief=>:sunken, 
-					:borderwidth=>1)
+                                        :anchor=>:w, :relief=>:sunken, 
+                                        :borderwidth=>1)
     subf = labf1.get_frame
     Tk.pack(TkRadiobutton.new(subf, :text=>'Ok', :value=>'ok', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Ok, Cancel', :value=>'okcancel', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Retry, Cancel', 
-			      :value=>'retrycancel', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Yes, No', :value=>'yesno', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Yes, No, Cancel', 
-			      :value=>'yesnocancel', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Abort, Retry, Ignore', 
-			      :value=>'abortretryignore', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    :fill=>:x, :anchor=>:w)
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Ok, Cancel', :value=>'okcancel', 
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Retry, Cancel', 
+                              :value=>'retrycancel', 
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Yes, No', :value=>'yesno', 
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Yes, No, Cancel', 
+                              :value=>'yesnocancel', 
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Abort, Retry, Ignore', 
+                              :value=>'abortretryignore', 
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            :fill=>:x, :anchor=>:w)
 
     Tk.pack(TkRadiobutton.new(subf, :text=>'User', :value=>'user', 
-			      :variable=>@@msg.ref('type'), :anchor=>:w), 
-	    Tk::BWidget::Entry.new(subf, :textvariable=>@@msg.ref('buttons')),
-	    :side=>:left)
+                              :variable=>@@msg.ref('type'), :anchor=>:w), 
+            Tk::BWidget::Entry.new(subf, :textvariable=>@@msg.ref('buttons')),
+            :side=>:left)
 
     labf2 = Tk::BWidget::LabelFrame.new(parent, :text=>'Icon', :side=>:top, 
-					:anchor=>:w, :relief=>:sunken, 
-					:borderwidth=>1)
+                                        :anchor=>:w, :relief=>:sunken, 
+                                        :borderwidth=>1)
     subf = labf2.get_frame
     Tk.pack(TkRadiobutton.new(subf, :text=>'Information', :value=>'info', 
-			      :variable=>@@msg.ref('icon'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Question',    :value=>'question', 
-			      :variable=>@@msg.ref('icon'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Warning',     :value=>'warning', 
-			      :variable=>@@msg.ref('icon'), :anchor=>:w), 
-	    TkRadiobutton.new(subf, :text=>'Error',       :value=>'error', 
-			      :variable=>@@msg.ref('icon'), :anchor=>:w), 
-	    :fill=>:x, :anchor=>:w)
+                              :variable=>@@msg.ref('icon'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Question',    :value=>'question', 
+                              :variable=>@@msg.ref('icon'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Warning',     :value=>'warning', 
+                              :variable=>@@msg.ref('icon'), :anchor=>:w), 
+            TkRadiobutton.new(subf, :text=>'Error',       :value=>'error', 
+                              :variable=>@@msg.ref('icon'), :anchor=>:w), 
+            :fill=>:x, :anchor=>:w)
 
     sep = Tk::BWidget::Separator.new(parent, :orient=>:horizontal)
     button = TkButton.new(parent, :text=>'Show', :command=>proc{_show_msgdlg})
@@ -138,15 +138,15 @@ module DemoDialog
 
   def self._stddlg(parent)
     Tk.pack(TkButton.new(parent, :text=>'Select a color '){|w|
-	      command(proc{DemoDialog._show_color(w)})
-	    }, 
-	    TkButton.new(parent, :text=>'Font selector dialog', 
-			 :command=>proc{_show_fontdlg}), 
-	    TkButton.new(parent, :text=>'Progression dialog', 
-			 :command=>proc{_show_progdlg}), 
-	    TkButton.new(parent, :text=>'Password dialog', 
-			 :command=>proc{_show_passdlg}), 
-	    :side=>:left, :padx=>5, :anchor=>:w)
+              command(proc{DemoDialog._show_color(w)})
+            }, 
+            TkButton.new(parent, :text=>'Font selector dialog', 
+                         :command=>proc{_show_fontdlg}), 
+            TkButton.new(parent, :text=>'Progression dialog', 
+                         :command=>proc{_show_progdlg}), 
+            TkButton.new(parent, :text=>'Password dialog', 
+                         :command=>proc{_show_passdlg}), 
+            :side=>:left, :padx=>5, :anchor=>:w)
   end
 
   def self._show_color(w)
@@ -159,15 +159,15 @@ module DemoDialog
 
   def self._show_tmpldlg
     dlg = Tk::BWidget::Dialog.new(:relative=>Tk.root, :modal=>:local, 
-				  :separator=>true, :title=>'Template dialog', 
-				  :side=>@@tmpl['side'], 
-				  :anchor=>@@tmpl['anchor'], 
-				  :default=>0, :cancel=>1)
+                                  :separator=>true, :title=>'Template dialog', 
+                                  :side=>@@tmpl['side'], 
+                                  :anchor=>@@tmpl['anchor'], 
+                                  :default=>0, :cancel=>1)
     dlg.add('name'=>'ok')
     dlg.add('name'=>'cancel')
     TkMessage.new(dlg.get_frame, :text=>"Template\nDialog", :justify=>:center, 
-		  :anchor=>:c, :width=>80).pack(:fill=>:both, :expand=>true, 
-						:padx=>100, :pady=>100)
+                  :anchor=>:c, :width=>80).pack(:fill=>:both, :expand=>true, 
+                                                :padx=>100, :pady=>100)
     dlg.draw
     dlg.destroy
   end
@@ -175,16 +175,16 @@ module DemoDialog
   def self._show_msgdlg
     @@msgdlg.destroy if @@msgdlg
     @@msgdlg = Tk::BWidget::MessageDlg.new(:relative=>Tk.root, 
-					   :message=>'Message for MessageBox', 
-					   :type=>@@msg['type'], 
-					   :icon=>@@msg['icon'], 
-					   :buttons=>@@msg['buttons'])
+                                           :message=>'Message for MessageBox', 
+                                           :type=>@@msg['type'], 
+                                           :icon=>@@msg['icon'], 
+                                           :buttons=>@@msg['buttons'])
     @@msgdlg.create
   end
 
   def self._show_fontdlg
     font = Tk::BWidget::SelectFont.new(:relative=>Tk.root, 
-				       :font=>DemoVar.font).create
+                                       :font=>DemoVar.font).create
     DemoVar::Demo.update_font(font)
   end
 
@@ -193,11 +193,11 @@ module DemoDialog
     @@progval.value = 0
 
     @@progdlg = Tk::BWidget::ProgressDlg.new(:relative=>Tk.root, 
-					     :title=>'Wait...', 
-					     :type=>'infinite', :width=>20, 
-					     :textvariable=>@@progmsg, 
-					     :variable=>@@progval, 
-					     :stop=>'Stop') {
+                                             :title=>'Wait...', 
+                                             :type=>'infinite', :width=>20, 
+                                             :textvariable=>@@progmsg, 
+                                             :variable=>@@progval, 
+                                             :stop=>'Stop') {
       command(proc{self.destroy})
       create
     }
@@ -206,12 +206,12 @@ module DemoDialog
 
   def self._update_progdlg
     TkTimer.new(20, -1, proc{
-		  if @@progdlg && @@progdlg.winfo_exist?
-		    @@progval.value = 2
-		  else
-		    stop
-		  end
-		}).start
+                  if @@progdlg && @@progdlg.winfo_exist?
+                    @@progval.value = 2
+                  else
+                    stop
+                  end
+                }).start
   end
 
   def self._show_passdlg
diff --git a/ext/tk/sample/tkextlib/bwidget/tree.rb b/ext/tk/sample/tkextlib/bwidget/tree.rb
index 9bfa4f3cc..a355b6759 100644
--- a/ext/tk/sample/tkextlib/bwidget/tree.rb
+++ b/ext/tk/sample/tkextlib/bwidget/tree.rb
@@ -17,29 +17,29 @@ module DemoTree
     pane = pw.add(:weight=>1)
     title = Tk::BWidget::TitleFrame.new(pane, :text=>'Directory tree')
     sw = Tk::BWidget::ScrolledWindow.new(title.get_frame, 
-					 :relief=>:sunken, :borderwidth=>2)
+                                         :relief=>:sunken, :borderwidth=>2)
     tree = Tk::BWidget::Tree.new(sw, :relief=>:flat, :borderwidth=>0, 
-				 :width=>15, :highlightthickness=>0, 
-				 :redraw=>false, :dropenabled=>true, 
-				 :dragenabled=>true, :dragevent=>3, 
-				 :droptypes=>[
-				   'TREE_NODE', [
-				     :copy, [], 
-				     :move, [],
-				     :link, []
-				   ], 
-				   'LISTBOX_ITEM', [
-				     :copy, [], 
-				     :move, [],
-				     :link, []
-				   ]
-				 ], 
-				 :opencmd=>proc{|node| 
-				   moddir(1, tree, node)
-				 }, 
-				 :closecmd=>proc{|node| 
-				   moddir(0, tree, node)
-				 })
+                                 :width=>15, :highlightthickness=>0, 
+                                 :redraw=>false, :dropenabled=>true, 
+                                 :dragenabled=>true, :dragevent=>3, 
+                                 :droptypes=>[
+                                   'TREE_NODE', [
+                                     :copy, [], 
+                                     :move, [],
+                                     :link, []
+                                   ], 
+                                   'LISTBOX_ITEM', [
+                                     :copy, [], 
+                                     :move, [],
+                                     :link, []
+                                   ]
+                                 ], 
+                                 :opencmd=>proc{|node| 
+                                   moddir(1, tree, node)
+                                 }, 
+                                 :closecmd=>proc{|node| 
+                                   moddir(0, tree, node)
+                                 })
     sw.set_widget(tree)
 
     sw.pack(:side=>:top, :expand=>true, :fill=>:both)
@@ -48,27 +48,27 @@ module DemoTree
     pane = pw.add(:weight=>2)
     lf = Tk::BWidget::TitleFrame.new(pane, :text=>'Content')
     sw = Tk::BWidget::ScrolledWindow.new(lf.get_frame, 
-					 :scrollbar=>:horizontal, 
-					 :auto=>:none, :relief=>:sunken, 
-					 :borderwidth=>2)
+                                         :scrollbar=>:horizontal, 
+                                         :auto=>:none, :relief=>:sunken, 
+                                         :borderwidth=>2)
 
     list = Tk::BWidget::ListBox.new(sw, :relief=>:flat, :borderwidth=>0, 
-				    :highlightthickness=>0, :width=>20, 
-				    :multicolumn=>true, :redraw=>false, 
-				    :dragevent=>3, :dropenabled=>true, 
-				    :dragenabled=>true, 
-				 :droptypes=>[
-				      'TREE_NODE', [
-					:copy, [], 
-					:move, [],
-					:link, []
-				      ], 
-				      'LISTBOX_ITEM', [
-					:copy, [], 
-					:move, [],
-					:link, []
-				      ]
-				    ])
+                                    :highlightthickness=>0, :width=>20, 
+                                    :multicolumn=>true, :redraw=>false, 
+                                    :dragevent=>3, :dropenabled=>true, 
+                                    :dragenabled=>true, 
+                                 :droptypes=>[
+                                      'TREE_NODE', [
+                                        :copy, [], 
+                                        :move, [],
+                                        :link, []
+                                      ], 
+                                      'LISTBOX_ITEM', [
+                                        :copy, [], 
+                                        :move, [],
+                                        :link, []
+                                      ]
+                                    ])
     sw.set_widget(list)
 
     Tk.pack(sw, lf, :fill=>:both, :expand=>true)
@@ -76,51 +76,51 @@ module DemoTree
     pw.pack(:fill=>:both, :expand=>true)
 
     tree.textbind('ButtonPress-1',
-		  proc{|node, ev| select('tree', 1, tree, list, node)})
+                  proc{|node, ev| select('tree', 1, tree, list, node)})
     tree.textbind('Double-ButtonPress-1', 
-		  proc{|node, ev| select('tree', 2, tree, list, node)})
+                  proc{|node, ev| select('tree', 2, tree, list, node)})
 
     list.textbind('ButtonPress-1',
-		  proc{|node, ev| select('list', 1, tree, list, node)})
+                  proc{|node, ev| select('list', 1, tree, list, node)})
     list.textbind('Double-ButtonPress-1', 
-		  proc{|node, ev| select('list', 2, tree, list, node)})
+                  proc{|node, ev| select('list', 2, tree, list, node)})
 
     list.imagebind('Double-ButtonPress-1', 
-		   proc{|node, ev| select('list', 2, tree, list, node)})
+                   proc{|node, ev| select('list', 2, tree, list, node)})
 
     nb.itemconfigure('demoTree', 
-		     :createcmd=>proc{|*args| init(tree, list, *args)}, 
-		     :raisecmd=>proc{
-		       Tk.root.geometry =~ 
-			 /\d+x\d+([+-]{1,2}\d+)([+-]{1,2}\d+)/
-		       global_w = ($1 || 0).to_i
-		       global_h = ($2 || 0).to_i
-		       if @@top
-			 Tk::BWidget.place(@@top, 0, 0, :at, 
-			    global_w - Tk.root.winfo_screenwidth, global_h)
-			 @@top.deiconify
-			 Tk.root.bind('Unmap', proc{@@top.withdraw})
-			 Tk.root.bind('Map',   proc{@@top.deiconify})
-			 Tk.root.bind('Configure', proc{|w|
-				if w == Tk.root
-				  Tk.root.geometry =~ 
-				    /\d+x\d+([+-]{1,2}\d+)([+-]{1,2}\d+)/
-				  global_w = ($1 || 0).to_i
-				  global_h = ($2 || 0).to_i
-				  BWidget.place(@@top, 0, 0, :at, 
-				       global_w - Tk.root.winfo_screenwidth, 
-				       global_h)
-				end
-			 }, '%W')
-		       end
-		     }, 
-		     :leavecmd=>proc{
-		       @@top.withdraw if @@top
-		       Tk.root.bind_remove('Unmap')
-		       Tk.root.bind_remove('Map')
-		       Tk.root.bind_remove('Configure')
-		       return true
-		     })
+                     :createcmd=>proc{|*args| init(tree, list, *args)}, 
+                     :raisecmd=>proc{
+                       Tk.root.geometry =~ 
+                         /\d+x\d+([+-]{1,2}\d+)([+-]{1,2}\d+)/
+                       global_w = ($1 || 0).to_i
+                       global_h = ($2 || 0).to_i
+                       if @@top
+                         Tk::BWidget.place(@@top, 0, 0, :at, 
+                            global_w - Tk.root.winfo_screenwidth, global_h)
+                         @@top.deiconify
+                         Tk.root.bind('Unmap', proc{@@top.withdraw})
+                         Tk.root.bind('Map',   proc{@@top.deiconify})
+                         Tk.root.bind('Configure', proc{|w|
+                                if w == Tk.root
+                                  Tk.root.geometry =~ 
+                                    /\d+x\d+([+-]{1,2}\d+)([+-]{1,2}\d+)/
+                                  global_w = ($1 || 0).to_i
+                                  global_h = ($2 || 0).to_i
+                                  BWidget.place(@@top, 0, 0, :at, 
+                                       global_w - Tk.root.winfo_screenwidth, 
+                                       global_h)
+                                end
+                         }, '%W')
+                       end
+                     }, 
+                     :leavecmd=>proc{
+                       @@top.withdraw if @@top
+                       Tk.root.bind_remove('Unmap')
+                       Tk.root.bind_remove('Map')
+                       Tk.root.bind_remove('Configure')
+                       return true
+                     })
   end
 
   def self.init(tree, list, *args)
@@ -132,8 +132,8 @@ module DemoTree
     end
 
     tree.insert('end', 'root', 'home', 
-		:text=>rootdir, :data=>rootdir, :open=>true, 
-		:image=>Tk::BWidget::Bitmap.new('openfold'))
+                :text=>rootdir, :data=>rootdir, :open=>true, 
+                :image=>Tk::BWidget::Bitmap.new('openfold'))
     getdir(tree, 'home', rootdir)
     select('tree', 1, tree, list, 'home')
     tree.redraw(true)
@@ -148,8 +148,8 @@ module DemoTree
     @@top.title('Drag rectangle to scroll directory tree')
     @@top.transient(Tk.root)
     Tk::BWidget::ScrollView.new(@@top, :window=>tree, :fill=>'white', 
-				:width=>300, :height=>300, :relief=>:sunken, 
-				:bd=>1).pack(:fill=>:both, :expand=>true)
+                                :width=>300, :height=>300, :relief=>:sunken, 
+                                :bd=>1).pack(:fill=>:both, :expand=>true)
   end
 
   def self.getdir(tree, node, path)
@@ -158,13 +158,13 @@ module DemoTree
     lentries.each{|f|
       basename = File.basename(f)      
       if File.directory?(f)
-	Tk::BWidget::Tree::Node.new(tree, node, 
-				    :index=>'end', :text=>basename, 
-				    :image=>Tk::BWidget::Bitmap.new('folder'), 
-				    :drawcross=>:allways, :data=>f)
-	@@count += 1
+        Tk::BWidget::Tree::Node.new(tree, node, 
+                                    :index=>'end', :text=>basename, 
+                                    :image=>Tk::BWidget::Bitmap.new('folder'), 
+                                    :drawcross=>:allways, :data=>f)
+        @@count += 1
       else
-	lfiles << basename
+        lfiles << basename
       end
     }
     tree.itemconfigure(node, :drawcross=>:auto, :data=>lfiles)
@@ -174,9 +174,9 @@ module DemoTree
     if (idx != 0 && tree.itemcget(node, :drawcross).to_s == 'allways')
       getdir(tree, node, tree.itemcget(node, :data))
       if tree.nodes(node).empty?
-	tree.itemconfigure(node, :image=>Tk::BWidget::Bitmap.new('folder'))
+        tree.itemconfigure(node, :image=>Tk::BWidget::Bitmap.new('folder'))
       else
-	tree.itemconfigure(node, :image=>Tk::BWidget::Bitmap.new('openfold'))
+        tree.itemconfigure(node, :image=>Tk::BWidget::Bitmap.new('openfold'))
       end
     else
       img = %w(folder openfold)[idx] || 'openfold'
@@ -188,31 +188,31 @@ module DemoTree
     @@dblclick = true
     if num == 1
       if (where == 'tree' && 
-	  tree.selection_get.find{|x|
-	    TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
-	  })
-	@@dblclick = false
-	Tk.after(500, proc{edit('tree', tree, list, node)})
-	return
+          tree.selection_get.find{|x|
+            TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
+          })
+        @@dblclick = false
+        Tk.after(500, proc{edit('tree', tree, list, node)})
+        return
       end
       if (where == 'list' && 
-	  list.selection_get.find{|x|
-	    TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
-	  })
-	@@dblclick = false
-	Tk.after(500, proc{edit('list', tree, list, node)})
-	return
+          list.selection_get.find{|x|
+            TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
+          })
+        @@dblclick = false
+        Tk.after(500, proc{edit('list', tree, list, node)})
+        return
       end
       if where == 'tree'
-	select_node(tree, list, node)
+        select_node(tree, list, node)
       else
-	list.selection_set(node)
+        list.selection_set(node)
       end
     elsif (where == 'list' && tree.exist?(node))
       parent = tree.parent(node)
       while TkUtil._get_eval_string(parent) != 'root'
-	tree.itemconfigure(parent, :open=>true)
-	parent = tree.parent(parent)
+        tree.itemconfigure(parent, :open=>true)
+        parent = tree.parent(parent)
       end
       select_node(tree, list, node)
     end
@@ -231,13 +231,13 @@ module DemoTree
 
     tree.nodes(node).each{|subnode|
       list.insert('end', subnode, 
-		  :text=>tree.itemcget(subnode, :text), 
-		  :image=>Tk::BWidget::Bitmap.new('folder'))
+                  :text=>tree.itemcget(subnode, :text), 
+                  :image=>Tk::BWidget::Bitmap.new('folder'))
     }
 
     TkComm.simplelist(dir).each{|f|
       Tk::BWidget::ListBox::Item.new(list, 'end', :text=>f, 
-				     :image=>Tk::BWidget::Bitmap.new('file'))
+                                     :image=>Tk::BWidget::Bitmap.new('file'))
     }
   end
 
@@ -245,16 +245,16 @@ module DemoTree
     return if @@dblclick
 
     if (where == 'tree' && 
-	tree.selection_get.find{|x|
-	  TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
-	})
+        tree.selection_get.find{|x|
+          TkUtil._get_eval_string(x) == TkUtil._get_eval_string(node)
+        })
       res = tree.edit(node, tree.itemcget(node, :text))
       if res != ''
-	tree.itemconfigure(node, :text=>res)
-	if list.exist?(node)
-	  list.itemconfigure(node, :text=>res)
-	end
-	tree.selection_set(node)
+        tree.itemconfigure(node, :text=>res)
+        if list.exist?(node)
+          list.itemconfigure(node, :text=>res)
+        end
+        tree.selection_set(node)
       end
       return
     end
@@ -262,17 +262,17 @@ module DemoTree
     if (where == 'list')
       res = list.edit(node, list.igemcget(node, :text))
       if res != ''
-	list.itemconfigure(node, :text=>res)
-	if tree.exist?(node)
-	  tree.itemconfigure(node, :text=>res)
-	else
-	  cursel = tree.selection_get[0]
-	  index  = list.index(node) - tree.nodes(cursel).size
-	  data   = TkComm.simplelist(tree.itemcget(cursel, :data))
-	  data[index] = res
-	  tree.itemconfigure(cursel, :date=>data)
-	end
-	list.selection_set(node)
+        list.itemconfigure(node, :text=>res)
+        if tree.exist?(node)
+          tree.itemconfigure(node, :text=>res)
+        else
+          cursel = tree.selection_get[0]
+          index  = list.index(node) - tree.nodes(cursel).size
+          data   = TkComm.simplelist(tree.itemcget(cursel, :data))
+          data[index] = res
+          tree.itemconfigure(cursel, :date=>data)
+        end
+        list.selection_set(node)
       end
     end
   end
@@ -280,9 +280,9 @@ module DemoTree
   def self.expand(tree, but)
     unless (cur = tree.selection_get).empty?
       if TkComm.bool(but)
-	tree.opentree(cur)
+        tree.opentree(cur)
       else
-	tree.closetree(cur)
+        tree.closetree(cur)
       end
     end
   end
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/calendar.rb b/ext/tk/sample/tkextlib/iwidgets/sample/calendar.rb
index 7a7c65ae8..4dd929c03 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/calendar.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/calendar.rb
@@ -3,8 +3,8 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 Tk::Iwidgets::Calendar.new(:command=>proc{|arg| puts(arg.date)}, 
-			   :weekendbackground=>'mistyrose', 
-			   :weekdaybackground=>'ghostwhite', 
-			   :outline=>'black', :startday=>'wednesday', 
-			   :days=>%w(We Th Fr Sa Su Mo Tu)).pack
+                           :weekendbackground=>'mistyrose', 
+                           :weekdaybackground=>'ghostwhite', 
+                           :outline=>'black', :startday=>'wednesday', 
+                           :days=>%w(We Th Fr Sa Su Mo Tu)).pack
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/combobox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/combobox.rb
index 5c2e6cbbd..ec9c7a1df 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/combobox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/combobox.rb
@@ -6,11 +6,11 @@ require 'tkextlib/iwidgets'
 # Non-editable Dropdown Combobox
 #
 cb1 = Tk::Iwidgets::Combobox.new(:labeltext=>'Month:', 
-				 :selectioncommand=>proc{
-				   puts(cb1.get_curselection)
-				 }, 
-				 :editable=>false, :listheight=>185, 
-				 :popupcursor=>'hand1')
+                                 :selectioncommand=>proc{
+                                   puts(cb1.get_curselection)
+                                 }, 
+                                 :editable=>false, :listheight=>185, 
+                                 :popupcursor=>'hand1')
 
 cb1.insert_list('end', *%w(Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec))
 
@@ -19,9 +19,9 @@ cb1.insert_list('end', *%w(Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec))
 # Editable Dropdown Combobox
 #
 cb2 = Tk::Iwidgets::Combobox.new(:labeltext=>'Operating System:', 
-				 :selectioncommand=>proc{
-				   puts(cb2.get_curselection)
-				 })
+                                 :selectioncommand=>proc{
+                                   puts(cb2.get_curselection)
+                                 })
 
 cb2.insert_list('end', *%w(Linux HP-UX SunOS Solaris Irix))
 cb2.insert_entry('end', 'L')
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/dialogshell.rb b/ext/tk/sample/tkextlib/iwidgets/sample/dialogshell.rb
index d4578297e..197521e0a 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/dialogshell.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/dialogshell.rb
@@ -9,6 +9,6 @@ ds.add('Cancel', :text=>'Cancel', :command=>proc{puts 'Cancel'; ds.deactivate})
 ds.default('OK')
 
 TkButton.new(:text=>'ACTIVATE', :padx=>7, :pady=>7, 
-	     :command=>proc{puts ds.activate}).pack(:padx=>10, :pady=>10)
+             :command=>proc{puts ds.activate}).pack(:padx=>10, :pady=>10)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/disjointlistbox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/disjointlistbox.rb
index f7a0e5c48..85c5d03d1 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/disjointlistbox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/disjointlistbox.rb
@@ -3,7 +3,7 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 djl = Tk::Iwidgets::Disjointlistbox.new.pack(:fill=>:both, :expand=>true, 
-					     :padx=>10,  :pady=>10)
+                                             :padx=>10,  :pady=>10)
 djl.set_lhs(*[0,2,4,5])
 djl.set_rhs(3,6)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-1.rb b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-1.rb
index 24253fcb9..856d883a9 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-1.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-1.rb
@@ -12,21 +12,21 @@ TkOption.add('*textBackground', 'white')
 ef  = Tk::Iwidgets::Entryfield.new(:command=>proc{puts "Return Pressed"})
 
 fef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Fixed:', 
-				   :fixed=>10, :width=>12)
+                                   :fixed=>10, :width=>12)
 
 nef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Numeric:', 
-				   :validate=>:numeric, :width=>12)
+                                   :validate=>:numeric, :width=>12)
 
 aef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Alphabetic:', 
-				   :validate=>:alphabetic, :width=>12, 
-				   :invalid=>proc{
-				     puts "Alphabetic contents invalid"
-				   })
+                                   :validate=>:alphabetic, :width=>12, 
+                                   :invalid=>proc{
+                                     puts "Alphabetic contents invalid"
+                                   })
 
 pef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Password:', :width=>12, 
-				   :show=>Tk::UTF8_String("\267"),  
-				                         ## <=== utf8 character
-				   :command=>proc{puts "Return Pressed"})
+                                   :show=>Tk::UTF8_String("\267"),  
+                                                         ## <=== utf8 character
+                                   :command=>proc{puts "Return Pressed"})
 
 Tk::Iwidgets::Labeledwidget.alignlabels(ef, fef, nef, aef, pef)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-2.rb
index 9a80e4aaf..4a4c2e7eb 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-2.rb
@@ -14,20 +14,20 @@ TkOption.add('*textBackground', 'white')
 ef  = Tk::Iwidgets::Entryfield.new(:command=>proc{puts "Return Pressed"})
 
 fef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Fixed:', 
-				   :fixed=>10, :width=>12)
+                                   :fixed=>10, :width=>12)
 
 nef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Numeric:', 
-				   :validate=>:numeric, :width=>12)
+                                   :validate=>:numeric, :width=>12)
 
 aef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Alphabetic:', 
-				   :validate=>:alphabetic, :width=>12, 
-				   :invalid=>proc{
-				     puts "Alphabetic contents invalid"
-				   })
+                                   :validate=>:alphabetic, :width=>12, 
+                                   :invalid=>proc{
+                                     puts "Alphabetic contents invalid"
+                                   })
 
 pef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Password:', :width=>12, 
-				   :show=>"\267",  ## <=== utf8 character
-				   :command=>proc{puts "Return Pressed"})
+                                   :show=>"\267",  ## <=== utf8 character
+                                   :command=>proc{puts "Return Pressed"})
 
 Tk::Iwidgets::Labeledwidget.alignlabels(ef, fef, nef, aef, pef)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-3.rb b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-3.rb
index e83030839..bddd542f6 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-3.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/entryfield-3.rb
@@ -14,20 +14,20 @@ TkOption.add('*textBackground', 'white')
 ef  = Tk::Iwidgets::Entryfield.new(:command=>proc{puts "Return Pressed"})
 
 fef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Fixed:', 
-				   :fixed=>10, :width=>12)
+                                   :fixed=>10, :width=>12)
 
 nef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Numeric:', 
-				   :validate=>:numeric, :width=>12)
+                                   :validate=>:numeric, :width=>12)
 
 aef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Alphabetic:', 
-				   :validate=>:alphabetic, :width=>12, 
-				   :invalid=>proc{
-				     puts "Alphabetic contents invalid"
-				   })
+                                   :validate=>:alphabetic, :width=>12, 
+                                   :invalid=>proc{
+                                     puts "Alphabetic contents invalid"
+                                   })
 
 pef = Tk::Iwidgets::Entryfield.new(:labeltext=>'Password:', :width=>12, 
-				   :show=>"\267",  ## <=== utf8 character
-				   :command=>proc{puts "Return Pressed"})
+                                   :show=>"\267",  ## <=== utf8 character
+                                   :command=>proc{puts "Return Pressed"})
 
 Tk::Iwidgets::Labeledwidget.alignlabels(ef, fef, nef, aef, pef)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/extbutton.rb b/ext/tk/sample/tkextlib/iwidgets/sample/extbutton.rb
index 83a6a07b6..6971052b6 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/extbutton.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/extbutton.rb
@@ -3,18 +3,18 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 Tk::Iwidgets::Extbutton.new(:text=>'Bitmap example', :bitmap=>'info', 
-			    :background=>'bisque',  :activeforeground=>'red', 
-			    :bitmapforeground=>'blue', :defaultring=>true, 
-			    :command=>proc{
-			      puts "Bisque is beautiful"
-			    }).pack(:expand=>true)
+                            :background=>'bisque',  :activeforeground=>'red', 
+                            :bitmapforeground=>'blue', :defaultring=>true, 
+                            :command=>proc{
+                              puts "Bisque is beautiful"
+                            }).pack(:expand=>true)
 
 #img = TkPhotoImage.new(:file=>File.join(File.dirname(File.expand_path(__FILE__)), '../../../images/earthris.gif'))
 img = TkPhotoImage.new(:file=>File.join(File.dirname(File.expand_path(__FILE__)), '../catalog_demo/images/clear.gif'))
 
 Tk::Iwidgets::Extbutton.new(:text=>'Image example', :relief=>:ridge, 
-			    :image=>img, :imagepos=>:e, :font=>'9x15bold', 
-			    :activebackground=>'lightyellow', 
-			    :background=>'lightgreen').pack(:expand=>true)
+                            :image=>img, :imagepos=>:e, :font=>'9x15bold', 
+                            :activebackground=>'lightyellow', 
+                            :background=>'lightgreen').pack(:expand=>true)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectionbox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectionbox.rb
index ef3b14ff4..4738084d9 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectionbox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectionbox.rb
@@ -3,6 +3,6 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 Tk::Iwidgets::Extfileselectionbox.new.pack(:padx=>10, :pady=>10, 
-					   :fill=>:both, :expand=>true)
+                                           :fill=>:both, :expand=>true)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectiondialog.rb b/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectiondialog.rb
index 80a31d06e..c1a9b3def 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectiondialog.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/extfileselectiondialog.rb
@@ -9,9 +9,9 @@ mainloop = Thread.new{Tk.mainloop}
 #
 nmfsd = Tk::Iwidgets::Extfileselectiondialog.new(:title=>'Non-Modal')
 nmfsd.buttonconfigure('OK', :command=>proc{
-			puts "You selected #{nmfsd.get}"
-			nmfsd.deactivate
-		      })
+                        puts "You selected #{nmfsd.get}"
+                        nmfsd.deactivate
+                      })
 nmfsd.activate
 
 #
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/fileselectionbox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/fileselectionbox.rb
index f0313d948..2ad3adb97 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/fileselectionbox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/fileselectionbox.rb
@@ -3,6 +3,6 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 Tk::Iwidgets::Fileselectionbox.new.pack(:padx=>10, :pady=>10, 
-					:fill=>:both, :expand=>true)
+                                        :fill=>:both, :expand=>true)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/fileselectiondialog.rb b/ext/tk/sample/tkextlib/iwidgets/sample/fileselectiondialog.rb
index 955e5cbd2..ff22b2f64 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/fileselectiondialog.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/fileselectiondialog.rb
@@ -9,9 +9,9 @@ mainloop = Thread.new{Tk.mainloop}
 #
 nmfsd = Tk::Iwidgets::Fileselectiondialog.new(:title=>'Non-Modal')
 nmfsd.buttonconfigure('OK', :command=>proc{
-			puts "You selected #{nmfsd.get}"
-			nmfsd.deactivate
-		      })
+                        puts "You selected #{nmfsd.get}"
+                        nmfsd.deactivate
+                      })
 nmfsd.activate
 
 #
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/hierarchy.rb b/ext/tk/sample/tkextlib/iwidgets/sample/hierarchy.rb
index 594158294..c83ae3724 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/hierarchy.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/hierarchy.rb
@@ -11,15 +11,15 @@ def get_files(file)
 end
 
 Tk::Iwidgets::Hierarchy.new(:querycommand=>proc{|arg| get_files(arg.node)}, 
-			    :visibleitems=>'30x15', 
-			    :labeltext=>ENV['HOME']).pack(:side=>:left, 
-							  :expand=>true, 
-							  :fill=>:both)
+                            :visibleitems=>'30x15', 
+                            :labeltext=>ENV['HOME']).pack(:side=>:left, 
+                                                          :expand=>true, 
+                                                          :fill=>:both)
 
 # Tk::Iwidgets::Hierarchy.new(:querycommand=>[proc{|n| get_files(n)}, '%n'], 
-# 			    :visibleitems=>'30x15', 
-# 			    :labeltext=>ENV['HOME']).pack(:side=>:left, 
-# 							  :expand=>true, 
-# 							  :fill=>:both)
+#                           :visibleitems=>'30x15', 
+#                           :labeltext=>ENV['HOME']).pack(:side=>:left, 
+#                                                         :expand=>true, 
+#                                                         :fill=>:both)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/labeledwidget.rb b/ext/tk/sample/tkextlib/iwidgets/sample/labeledwidget.rb
index 1fed7d55e..1d2e0a98a 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/labeledwidget.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/labeledwidget.rb
@@ -3,11 +3,11 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 lw = Tk::Iwidgets::Labeledwidget.new(:labeltext=>'Canvas Widget', 
-				     :labelpos=>:s)
+                                     :labelpos=>:s)
 lw.pack(:fill=>:both, :expand=>true, :padx=>10, :pady=>10)
 
 cw = TkCanvas.new(lw.child_site, :relief=>:raised, :width=>200, :height=>200, 
-		  :borderwidth=>3, :background=>:white)
+                  :borderwidth=>3, :background=>:white)
 cw.pack(:padx=>10, :pady=>10)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/mainwindow.rb b/ext/tk/sample/tkextlib/iwidgets/sample/mainwindow.rb
index 85b28b45e..b87a6d27f 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/mainwindow.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/mainwindow.rb
@@ -5,57 +5,57 @@ require 'tkextlib/iwidgets'
 mw = Tk::Iwidgets::Mainwindow.new
 
 mw.menubar.add(:menubutton, 'file', :text=>'File', :underline=>0, 
-	       :padx=>8, :pady=>2, :menu=>[
-		 [:options, {:tearoff=>false}], 
+               :padx=>8, :pady=>2, :menu=>[
+                 [:options, {:tearoff=>false}], 
 
-		 [:command, 'new', {
-		     :label=>'New', :underline=>0, 
-		     :helpstr=>'Create a new file'
-		   }
-		 ], 
+                 [:command, 'new', {
+                     :label=>'New', :underline=>0, 
+                     :helpstr=>'Create a new file'
+                   }
+                 ], 
 
-		 [:command, 'open', {
-		     :label=>'Open ...', :underline=>0, 
-		     :helpstr=>'Open an existing file'
-		   }
-		 ], 
+                 [:command, 'open', {
+                     :label=>'Open ...', :underline=>0, 
+                     :helpstr=>'Open an existing file'
+                   }
+                 ], 
 
-		 [:command, 'save', {
-		     :label=>'Save', :underline=>0, 
-		     :helpstr=>'Save the current file'
-		   }
-		 ], 
+                 [:command, 'save', {
+                     :label=>'Save', :underline=>0, 
+                     :helpstr=>'Save the current file'
+                   }
+                 ], 
 
-		 [:command, 'saveas', {
-		     :label=>'Save As', :underline=>5, 
-		     :helpstr=>'Save the file as a different name'
-		   }
-		 ], 
+                 [:command, 'saveas', {
+                     :label=>'Save As', :underline=>5, 
+                     :helpstr=>'Save the file as a different name'
+                   }
+                 ], 
 
-		 [:command, 'print', {
-		     :label=>'Print', :underline=>0, 
-		     :helpstr=>'Print the file'
-		   }
-		 ], 
+                 [:command, 'print', {
+                     :label=>'Print', :underline=>0, 
+                     :helpstr=>'Print the file'
+                   }
+                 ], 
 
-		 [:separator, 'sep1'], 
+                 [:separator, 'sep1'], 
 
-		 [:command, 'close', {
-		     :label=>'Close', :underline=>0, 
-		     :helpstr=>'Close the file'
-		   }
-		 ], 
+                 [:command, 'close', {
+                     :label=>'Close', :underline=>0, 
+                     :helpstr=>'Close the file'
+                   }
+                 ], 
 
-		 [:separator, 'sep2'], 
+                 [:separator, 'sep2'], 
 
-		 [:command, 'exit', {
-		     :label=>'Exit', :underline=>1, 
-		     :helpstr=>'Exit this application'
-		   }
-		 ], 
+                 [:command, 'exit', {
+                     :label=>'Exit', :underline=>1, 
+                     :helpstr=>'Exit this application'
+                   }
+                 ], 
 
-		 nil
-	       ])
+                 nil
+               ])
 
 Tk::Iwidgets::Scrolledtext.new(mw.child_site).pack(:fill=>:both, :expand=>true)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/menubar.rb b/ext/tk/sample/tkextlib/iwidgets/sample/menubar.rb
index c61071470..891761adc 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/menubar.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/menubar.rb
@@ -8,109 +8,109 @@ viewmode = TkVariable.new
 menu_spec = [
   [:menubutton, 'file', {
       :text=>'File', :menu=>[
-	[:options, {:tearoff=>false}], 
-
-	[:command, 'new', {
-	    :label=>'New', :helpstr=>'Open new document', 
-	    :command=>proc{puts 'NEW'}
-	  }
-	], 
-
-	[:command, 'close', {
-	    :label=>'Close', :helpstr=>'Close current document', 
-	    :command=>proc{puts 'CLOSE'}
-	  }
-	], 
-
-	[:separator, 'sep1'], 
-
-	[:command, 'exit', {
-	    :label=>'Exit', :helpstr=>'Exit application', 
-	    :command=>proc{exit}
-	  }
-	]
+        [:options, {:tearoff=>false}], 
+
+        [:command, 'new', {
+            :label=>'New', :helpstr=>'Open new document', 
+            :command=>proc{puts 'NEW'}
+          }
+        ], 
+
+        [:command, 'close', {
+            :label=>'Close', :helpstr=>'Close current document', 
+            :command=>proc{puts 'CLOSE'}
+          }
+        ], 
+
+        [:separator, 'sep1'], 
+
+        [:command, 'exit', {
+            :label=>'Exit', :helpstr=>'Exit application', 
+            :command=>proc{exit}
+          }
+        ]
       ]
     }
   ], 
 
   [:menubutton, 'edit', {
       :text=>'Edit', :menu=>[
-	[:options, {:tearoff=>false}], 
-
-	[:command, 'undo', {
-	    :label=>'Undo', :underline=>0, 
-	    :helpstr=>'Undo last command', 
-	    :command=>proc{puts 'UNDO'}
-	  }
-	], 
-
-	[:separator, 'sep2'], 
-
-	[:command, 'cut', {
-	    :label=>'Cut', :underline=>1, 
-	    :helpstr=>'Cut selection to clipboard', 
-	    :command=>proc{puts 'CUT'}
-	  }
-	], 
-
-	[:command, 'copy', {
-	    :label=>'Copy', :underline=>1, 
-	    :helpstr=>'Copy selection to clipboard', 
-	    :command=>proc{puts 'COPY'}
-	  }
-	], 
-
-	[:command, 'paste', {
-	    :label=>'Paste', :underline=>0, 
-	    :helpstr=>'Paste clipboard contents', 
-	    :command=>proc{puts 'PASTE'}
-	  }
-	]
+        [:options, {:tearoff=>false}], 
+
+        [:command, 'undo', {
+            :label=>'Undo', :underline=>0, 
+            :helpstr=>'Undo last command', 
+            :command=>proc{puts 'UNDO'}
+          }
+        ], 
+
+        [:separator, 'sep2'], 
+
+        [:command, 'cut', {
+            :label=>'Cut', :underline=>1, 
+            :helpstr=>'Cut selection to clipboard', 
+            :command=>proc{puts 'CUT'}
+          }
+        ], 
+
+        [:command, 'copy', {
+            :label=>'Copy', :underline=>1, 
+            :helpstr=>'Copy selection to clipboard', 
+            :command=>proc{puts 'COPY'}
+          }
+        ], 
+
+        [:command, 'paste', {
+            :label=>'Paste', :underline=>0, 
+            :helpstr=>'Paste clipboard contents', 
+            :command=>proc{puts 'PASTE'}
+          }
+        ]
       ]
     }
   ], 
 
   [:menubutton, 'options', {
       :text=>'Options', :menu=>[
-	[:options, {:tearoff=>false, :selectcolor=>'blue'}], 
-
-	[:radiobutton, 'byName', {
-	    :variable=>viewmode, :value=>'NAME', 
-	    :label=>'by Name', :helpstr=>'View files by name order', 
-	    :command=>proc{puts 'NAME'}
-	  }
-	], 
-
-	[:radiobutton, 'byDate', {
-	    :variable=>viewmode, :value=>'DATE', 
-	    :label=>'by Date', :helpstr=>'View files by date order', 
-	    :command=>proc{puts 'DATE'}
-	  }
-	], 
-
-	[:cascade, 'prefs', {
-	    :label=>'Preferences', :menu=>[
-	      [:command, 'colors', {
-		  :label=>'Colors...', :helpstr=>'Change text colors', 
-		  :command=>proc{puts 'COLORS'}
-		}
-	      ], 
-
-	      [:command, 'fonts', {
-		  :label=>'Fonts...', :helpstr=>'Change text font', 
-		  :command=>proc{puts 'COLORS'}
-		}
-	      ]
-	    ]
-	  }
-	]
+        [:options, {:tearoff=>false, :selectcolor=>'blue'}], 
+
+        [:radiobutton, 'byName', {
+            :variable=>viewmode, :value=>'NAME', 
+            :label=>'by Name', :helpstr=>'View files by name order', 
+            :command=>proc{puts 'NAME'}
+          }
+        ], 
+
+        [:radiobutton, 'byDate', {
+            :variable=>viewmode, :value=>'DATE', 
+            :label=>'by Date', :helpstr=>'View files by date order', 
+            :command=>proc{puts 'DATE'}
+          }
+        ], 
+
+        [:cascade, 'prefs', {
+            :label=>'Preferences', :menu=>[
+              [:command, 'colors', {
+                  :label=>'Colors...', :helpstr=>'Change text colors', 
+                  :command=>proc{puts 'COLORS'}
+                }
+              ], 
+
+              [:command, 'fonts', {
+                  :label=>'Fonts...', :helpstr=>'Change text font', 
+                  :command=>proc{puts 'COLORS'}
+                }
+              ]
+            ]
+          }
+        ]
       ]
     }
   ]
 ]
 
 #mb = Tk::Iwidgets::Menubar.new(:helpvariable=>helpvar, 
-#			       :menubuttons=>menu_spec)
+#                              :menubuttons=>menu_spec)
 mb = Tk::Iwidgets::Menubar.new(:helpvariable=>helpvar)
 mb.configure(:menubuttons=>menu_spec)
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/menubar2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/menubar2.rb
index eec4928af..d6f229265 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/menubar2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/menubar2.rb
@@ -9,10 +9,10 @@ mb = Tk::Iwidgets::Menubar.new
 mb.menubuttons = [
   [:menubutton, 'file', {
       :text=>'File', :menu=>[
-	[:command,   'new',   {:label=>'New'}], 
-	[:command,   'close', {:label=>'Close'}], 
-	[:separator, 'sep1'], 
-	[:command,   'quit',  {:label=>'Quit'}]
+        [:command,   'new',   {:label=>'New'}], 
+        [:command,   'close', {:label=>'Close'}], 
+        [:separator, 'sep1'], 
+        [:command,   'quit',  {:label=>'Quit'}]
       ]
     }
   ], 
@@ -26,17 +26,17 @@ mb.add(:command, '.edit.copy',  :label=>'Copy',  :underline=>1)
 mb.add(:command, '.edit.paste', :label=>'Paste', :underline=>0)
 
 mb.add(:menubutton, '.options', :text=>'Options', :menu=>[
-	 [:radiobutton, 'byName', {
-	     :variable=>viewmode, :value=>'NAME', :label=>'by Name'}
-	 ], 
-	 [:radiobutton, 'byDate', {
-	     :variable=>viewmode, :value=>'DATE', :label=>'by Date'}
-	 ]
+         [:radiobutton, 'byName', {
+             :variable=>viewmode, :value=>'NAME', :label=>'by Name'}
+         ], 
+         [:radiobutton, 'byDate', {
+             :variable=>viewmode, :value=>'DATE', :label=>'by Date'}
+         ]
        ])
 
 mb.add(:cascade, '.options.prefs', :label=>'Preferences', :menu=>[
-	 [:command, 'colors', {:label=>'Colors...'}], 
-	 [:command, 'fonts',  {:label=>'Fonts...'}]
+         [:command, 'colors', {:label=>'Colors...'}], 
+         [:command, 'fonts',  {:label=>'Fonts...'}]
        ])
 
 mb.pack(:side=>:left, :anchor=>:nw, :fill=>:x, :expand=>true)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/messagebox1.rb b/ext/tk/sample/tkextlib/iwidgets/sample/messagebox1.rb
index 3f7b137b1..3221dbc30 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/messagebox1.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/messagebox1.rb
@@ -3,9 +3,9 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 mb = Tk::Iwidgets::Messagebox.new(:hscrollmode=>:dynamic, 
-				  :labeltext=>'Messages', :labelpos=>:n, 
-				  :height=>120, :width=>550, 
-				  :savedir=>'/tmp', :textbackground=>'#d9d9d9')
+                                  :labeltext=>'Messages', :labelpos=>:n, 
+                                  :height=>120, :width=>550, 
+                                  :savedir=>'/tmp', :textbackground=>'#d9d9d9')
 mb.pack(:padx=>5, :pady=>5, :fill=>:both, :expand=>true)
 
 mb.type_add('ERROR', :background=>'red', :foreground=>'white', :bell=>true)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/messagebox2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/messagebox2.rb
index 1aae7587e..2f0e3648a 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/messagebox2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/messagebox2.rb
@@ -3,9 +3,9 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 mb = Tk::Iwidgets::Messagebox.new(:hscrollmode=>:dynamic, 
-				  :labeltext=>'Messages', :labelpos=>:n, 
-				  :height=>120, :width=>550, 
-				  :savedir=>'/tmp', :textbackground=>'#d9d9d9')
+                                  :labeltext=>'Messages', :labelpos=>:n, 
+                                  :height=>120, :width=>550, 
+                                  :savedir=>'/tmp', :textbackground=>'#d9d9d9')
 mb.pack(:padx=>5, :pady=>5, :fill=>:both, :expand=>true)
 
 error   = mb.type_add(:background=>'red', :foreground=>'white', :bell=>true)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/messagedialog.rb b/ext/tk/sample/tkextlib/iwidgets/sample/messagedialog.rb
index 8cf373f96..6c6bfbca3 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/messagedialog.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/messagedialog.rb
@@ -8,8 +8,8 @@ mainloop = Thread.new{Tk.mainloop}
 # Standard question message dialog used for confirmation.
 #
 md = Tk::Iwidgets::Messagedialog.new(:title=>'Message Dialog', 
-				     :text=>'Are you sure ? ', 
-				     :bitmap=>'questhead', :modality=>:global)
+                                     :text=>'Are you sure ? ', 
+                                     :bitmap=>'questhead', :modality=>:global)
 
 md.buttonconfigure('OK', :text=>'Yes')
 md.buttonconfigure('Cancel', :text=>'No')
@@ -33,8 +33,8 @@ md.destroy
 bmp = '@' + File.join(File.dirname(File.expand_path(__FILE__)), '../catalog_demo/images/text.xbm')
 
 cr = Tk::Iwidgets::Messagedialog.new(:title=>'Copyright', 
-				     :bitmap=>bmp, :imagepos=>:n, 
-				     :text=>"Copyright 200x XXX Corporation\nAll rights reserved")
+                                     :bitmap=>bmp, :imagepos=>:n, 
+                                     :text=>"Copyright 200x XXX Corporation\nAll rights reserved")
 
 cr.hide('Cancel')
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/notebook.rb b/ext/tk/sample/tkextlib/iwidgets/sample/notebook.rb
index 77f1c1dc6..e33b81eb6 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/notebook.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/notebook.rb
@@ -5,7 +5,7 @@ require 'tkextlib/iwidgets'
 # Create the tabnotebook widget and pack it.
 nb = Tk::Iwidgets::Notebook.new(:width=>100, :height=>100)
 nb.pack(:anchor=>:nw, :fill=>:both, :expand=>true, 
-	:side=>:left, :padx=>10, :pady=>10)
+        :side=>:left, :padx=>10, :pady=>10)
 
 # Add two pages to the tabnotebook,
 # labelled "Page One" and "Page Two"
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/notebook2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/notebook2.rb
index e14e1207a..649de4f02 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/notebook2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/notebook2.rb
@@ -5,7 +5,7 @@ require 'tkextlib/iwidgets'
 # Create the tabnotebook widget and pack it.
 nb = Tk::Iwidgets::Notebook.new(:width=>100, :height=>100)
 nb.pack(:anchor=>:nw, :fill=>:both, :expand=>true, 
-	:side=>:top, :padx=>10, :pady=>0)
+        :side=>:top, :padx=>10, :pady=>0)
 
 # Add two pages to the tabnotebook,
 # labelled "Page One" and "Page Two"
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/optionmenu.rb b/ext/tk/sample/tkextlib/iwidgets/sample/optionmenu.rb
index bdeafb691..1fd7a5bc0 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/optionmenu.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/optionmenu.rb
@@ -3,7 +3,7 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 om = Tk::Iwidgets::Optionmenu.new(:labelmargin=>5, :labelpos=>:w, 
-				  :labeltext=>"Operating System :")
+                                  :labeltext=>"Operating System :")
 
 om.insert('end', 'Unix', 'VMS', 'Linux', 'OS/2', 'Windows NT', 'DOS')
 om.sort_ascending
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow.rb b/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow.rb
index 902b2c4bc..6e4458e50 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow.rb
@@ -12,7 +12,7 @@ pw.pack(:fill=>:both, :expand=>true)
 
 pw.child_site_list.each{|pane|
   TkButton.new(pane, :text=>pane.path, :relief=>:raised, 
-	       :borderwidth=>2).pack(:fill=>:both, :expand=>true)
+               :borderwidth=>2).pack(:fill=>:both, :expand=>true)
 }
 
 pw.fraction(50,30,20)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow2.rb
index 8928393a8..6779cb57d 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow2.rb
@@ -12,7 +12,7 @@ pw.pack(:fill=>:both, :expand=>true)
 
 pw.child_site_list.each{|pane|
   TkButton.new(pane, :text=>pane.path, :relief=>:raised, 
-	       :borderwidth=>2).pack(:fill=>:both, :expand=>true)
+               :borderwidth=>2).pack(:fill=>:both, :expand=>true)
 }
 
 pw.fraction(50,30,20)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/promptdialog.rb b/ext/tk/sample/tkextlib/iwidgets/sample/promptdialog.rb
index 7dbecc6dc..2c643e56f 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/promptdialog.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/promptdialog.rb
@@ -7,7 +7,7 @@ mainloop = Thread.new{Tk.mainloop}
 TkOption.add('*textBackground', 'white')
 
 pd = Tk::Iwidgets::Promptdialog.new(:modality=>:global, :title=>'Password', 
-				    :labeltext=>'Password:', :show=>'*')
+                                    :labeltext=>'Password:', :show=>'*')
 pd.hide('Apply')
 
 if TkComm.bool(pd.activate)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/pushbutton.rb b/ext/tk/sample/tkextlib/iwidgets/sample/pushbutton.rb
index b1f4d7d11..6e1c3fffe 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/pushbutton.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/pushbutton.rb
@@ -3,7 +3,7 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 Tk::Iwidgets::Pushbutton.new(:text=>'Hello', 
-			     :command=>proc{puts 'Hello World'}, 
-			     :defaultring=>true).pack(:padx=>10, :pady=>10)
+                             :command=>proc{puts 'Hello World'}, 
+                             :defaultring=>true).pack(:padx=>10, :pady=>10)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledframe.rb b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledframe.rb
index c12b66448..5219847c9 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledframe.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledframe.rb
@@ -3,7 +3,7 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 sf = Tk::Iwidgets::Scrolledframe.new(:width=>150, :height=>180, 
-				     :labeltext=>'scrolledframe')
+                                     :labeltext=>'scrolledframe')
 cs = sf.child_site
 
 TkButton.new(cs, :text=>'Hello').pack(:pady=>10)
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledhtml.rb b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledhtml.rb
index 6b0827ec8..04334b8da 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledhtml.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledhtml.rb
@@ -5,9 +5,9 @@ require 'tkextlib/iwidgets'
 TkOption.add('*textBackground', 'white')
 
 sh = Tk::Iwidgets::Scrolledhtml.new(:fontname=>'helvetica', 
-				    :linkcommand=>proc{|href|
-				      sh.import_link(href)
-				    })
+                                    :linkcommand=>proc{|href|
+                                      sh.import_link(href)
+                                    })
 sh.pack(:expand=>true, :fill=>:both, :padx=>10, :pady=>10)
 
 sh.import(Tk.getOpenFile(:title=>'select HTML document'))
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledlistbox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledlistbox.rb
index 98f932d05..0b6975191 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledlistbox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledlistbox.rb
@@ -5,16 +5,16 @@ require 'tkextlib/iwidgets'
 TkOption.add('*textBackground', 'white')
 
 slb = Tk::Iwidgets::Scrolledlistbox.new(:selectmode=>:single, 
-					:vscrollmode=>:static,
-					:hscrollmode=>:dynamic,
-					:labeltext=>'List', 
-					:selectioncommand=>proc{
-					  puts(slb.get_curselection)
-					}, 
-					:dblclickcommand=>proc{
-					  puts('Double Click')
-					  puts(slb.get_curselection)
-					})
+                                        :vscrollmode=>:static,
+                                        :hscrollmode=>:dynamic,
+                                        :labeltext=>'List', 
+                                        :selectioncommand=>proc{
+                                          puts(slb.get_curselection)
+                                        }, 
+                                        :dblclickcommand=>proc{
+                                          puts('Double Click')
+                                          puts(slb.get_curselection)
+                                        })
 slb.pack(:expand=>true, :fill=>:both, :padx=>10, :pady=>10)
 
 slb.insert('end', *['Hello', 'Out There', 'World'])
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledtext.rb b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledtext.rb
index 59a96fb9f..dd1a99a82 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/scrolledtext.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/scrolledtext.rb
@@ -3,7 +3,7 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 st = Tk::Iwidgets::Scrolledtext.new(:hscrollmode=>:dynamic, :wrap=>:none, 
-				    :labeltext=>'Password File')
+                                    :labeltext=>'Password File')
 st.pack(:expand=>true, :fill=>:both, :padx=>10, :pady=>10)
 
 st.import('/etc/passwd')
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/selectionbox.rb b/ext/tk/sample/tkextlib/iwidgets/sample/selectionbox.rb
index d19970fac..a5d623ae8 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/selectionbox.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/selectionbox.rb
@@ -5,12 +5,12 @@ require 'tkextlib/iwidgets'
 TkOption.add('*textBackground', 'white')
 
 sb = Tk::Iwidgets::Selectionbox.new.pack(:padx=>10, :pady=>10, 
-					 :fill=>:both, :expand=>true)
+                                         :fill=>:both, :expand=>true)
 
 sb.insert_items('end', *['Hello', 'Out There', 'World'])
 
 TkLabel.new(sb.child_site, 
-	    :text=>'Child Site is Here').pack(:fill=>:x, :padx=>10, :pady=>10)
+            :text=>'Child Site is Here').pack(:fill=>:x, :padx=>10, :pady=>10)
 
 sb.insert_items(2, 'Cruel Cruel')
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/selectiondialog.rb b/ext/tk/sample/tkextlib/iwidgets/sample/selectiondialog.rb
index 4fbb2aa37..f40b41918 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/selectiondialog.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/selectiondialog.rb
@@ -5,7 +5,7 @@ require 'tkextlib/iwidgets'
 mainloop = Thread.new{Tk.mainloop}
 
 TkButton.new(:text=>'QUIT', 
-	     :command=>proc{Tk.root.destroy}).pack(:padx=>10, :pady=>10)
+             :command=>proc{Tk.root.destroy}).pack(:padx=>10, :pady=>10)
 
 Tk::Iwidgets::Selectiondialog.new.activate
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/shell.rb b/ext/tk/sample/tkextlib/iwidgets/sample/shell.rb
index 850ddb29d..c44b5554a 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/shell.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/shell.rb
@@ -3,15 +3,15 @@ require 'tk'
 require 'tkextlib/iwidgets'
 
 sh = Tk::Iwidgets::Shell.new(:modality=>:application, 
-			     :padx=>20, :pady=>20, :title=>'Shell')
+                             :padx=>20, :pady=>20, :title=>'Shell')
 
 TkButton.new(:text=>'ACTIVATE', :padx=>7, :pady=>7, 
-	     :command=>proc{puts sh.activate}).pack(:padx=>10, :pady=>10)
+             :command=>proc{puts sh.activate}).pack(:padx=>10, :pady=>10)
 
 TkLabel.new(sh.child_site, :text=>'SHELL').pack
 TkButton.new(sh.child_site, :text=>'YES', 
-	     :command=>proc{sh.deactivate 'press YES'}).pack(:fill=>:x)
+             :command=>proc{sh.deactivate 'press YES'}).pack(:fill=>:x)
 TkButton.new(sh.child_site, :text=>'NO', 
-	     :command=>proc{sh.deactivate 'press NO'}).pack(:fill=>:x)
+             :command=>proc{sh.deactivate 'press NO'}).pack(:fill=>:x)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/spinint.rb b/ext/tk/sample/tkextlib/iwidgets/sample/spinint.rb
index 406408174..0bcdefb76 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/spinint.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/spinint.rb
@@ -5,6 +5,6 @@ require 'tkextlib/iwidgets'
 TkOption.add('*textBackground', 'white')
 
 Tk::Iwidgets::Spinint.new(:labeltext=>'Temperature', :labelpos=>:w, :width=>5, 
-			  :fixed=>true, :range=>[32, 212]).pack(:pady=>10)
+                          :fixed=>true, :range=>[32, 212]).pack(:pady=>10)
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/spinner.rb b/ext/tk/sample/tkextlib/iwidgets/sample/spinner.rb
index 44e8ec303..295d38ee9 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/spinner.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/spinner.rb
@@ -19,10 +19,10 @@ class Spinner_demo < TkWindow
 
   def initialize(parent=nil)
     @spinner = Tk::Iwidgets::Spinner.new(parent, :labeltext=>'Month : ', 
-					 :width=>10, :fixed=>10, 
-					 :validate=>proc{|c| block_input}, 
-					 :decrement=>proc{spin_month -1}, 
-					 :increment=>proc{spin_month 1})
+                                         :width=>10, :fixed=>10, 
+                                         :validate=>proc{|c| block_input}, 
+                                         :decrement=>proc{spin_month -1}, 
+                                         :increment=>proc{spin_month 1})
     @path = @spinner
     @spinner.insert(0, Months[0])
   end
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook.rb b/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook.rb
index 5a9897845..6f1ecc4fa 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook.rb
@@ -5,7 +5,7 @@ require 'tkextlib/iwidgets'
 # Create the tabnotebook widget and pack it.
 tn = Tk::Iwidgets::Tabnotebook.new(:width=>300, :height=>100)
 tn.pack(:anchor=>:nw, :fill=>:both, :expand=>true, 
-	:side=>:left, :padx=>10, :pady=>10)
+        :side=>:left, :padx=>10, :pady=>10)
 
 # Add two pages to the tabnotebook,
 # labelled "Page One" and "Page Two"
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook2.rb b/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook2.rb
index c08603f89..4a5eef5a8 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook2.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/tabnotebook2.rb
@@ -5,7 +5,7 @@ require 'tkextlib/iwidgets'
 # Create the tabnotebook widget and pack it.
 tn = Tk::Iwidgets::Tabnotebook.new(:width=>300, :height=>100)
 tn.pack(:anchor=>:nw, :fill=>:both, :expand=>true, 
-	:side=>:top, :padx=>10, :pady=>0)
+        :side=>:top, :padx=>10, :pady=>0)
 
 # Add two pages to the tabnotebook,
 # labelled "Page One" and "Page Two"
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/toolbar.rb b/ext/tk/sample/tkextlib/iwidgets/sample/toolbar.rb
index eba52ba5d..355466eb1 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/toolbar.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/toolbar.rb
@@ -89,7 +89,7 @@ EOD
 ##########################################
 
 bmp_dir = File.join(File.dirname(File.expand_path(__FILE__)), 
-		    '../catalog_demo/images')
+                    '../catalog_demo/images')
 
 ##########################################
 
diff --git a/ext/tk/sample/tkextlib/iwidgets/sample/watch.rb b/ext/tk/sample/tkextlib/iwidgets/sample/watch.rb
index d2b6246bf..808c798ae 100644
--- a/ext/tk/sample/tkextlib/iwidgets/sample/watch.rb
+++ b/ext/tk/sample/tkextlib/iwidgets/sample/watch.rb
@@ -9,7 +9,7 @@ Thread.new{
 }
 
 Tk::Iwidgets::Watch.new(:state=>:disabled, :showampm=>:no, 
-			:width=>155, :height=>155){|w|
+                        :width=>155, :height=>155){|w|
   w.pack(:padx=>10, :pady=>10, :fill=>:both, :expand=>true)
   # TkTimer.new(1000, -1, proc{w.show; Tk.update}).start
   TkTimer.new(25, -1, proc{w.show; Tk.update}).start
diff --git a/ext/tk/sample/tkextlib/tcllib/datefield.rb b/ext/tk/sample/tkextlib/tcllib/datefield.rb
index 1b0a29c0b..cfeca0c6d 100644
--- a/ext/tk/sample/tkextlib/tcllib/datefield.rb
+++ b/ext/tk/sample/tkextlib/tcllib/datefield.rb
@@ -21,8 +21,8 @@ my_date1.trace('w'){
 df = Tk::Tcllib::Datefield.new(:textvariable=>my_date1)
 Tk.grid(TkLabel.new(:text=>'Enter a date:', :anchor=>:e), df, :sticky=>:ew)
 Tk.grid(TkLabel.new(:text=>'That date ia a:', :anchor=>:e), 
-	TkLabel.new(:textvariable=>my_date2, :relief=>:sunken, :width=>12), 
-	:sticky=>:ew)
+        TkLabel.new(:textvariable=>my_date2, :relief=>:sunken, :width=>12), 
+        :sticky=>:ew)
 
 df.set_focus
 
diff --git a/ext/tk/sample/tkextlib/tcllib/plotdemos1.rb b/ext/tk/sample/tkextlib/tcllib/plotdemos1.rb
index 6077d8ab2..053b0de08 100644
--- a/ext/tk/sample/tkextlib/tcllib/plotdemos1.rb
+++ b/ext/tk/sample/tkextlib/tcllib/plotdemos1.rb
@@ -24,7 +24,7 @@ Tk.pack(vc1,vc2,vc3, :fill=>:both, :side=>:top)
 ###############################
 
 s = Tk::Tcllib::Plotchart::XYPlot.new(c1, [0.0, 100.0, 10.0], 
-				          [0.0, 100.0, 20.0])
+                                          [0.0, 100.0, 20.0])
 
 
 xd =    5.0
@@ -57,7 +57,7 @@ s.save_plot "aha.ps"
 s = Tk::Tcllib::Plotchart::Piechart.new(c2)
 
 s.plot([ ["Long names", 10], ["Short names", 30], 
-	 ["Average", 40],    ["Ultra-short names", 5] ])
+         ["Average", 40],    ["Ultra-short names", 5] ])
 
 #
 # Note: title should be shifted up
@@ -79,7 +79,7 @@ s.title "Cardioid"
 ###############################
 
 s = Tk::Tcllib::Plotchart::Barchart.new(hc1, %w(A B C D E), 
-					[0.0, 10.0, 2.0], 2)
+                                        [0.0, 10.0, 2.0], 2)
 
 s.plot('series1', [1.0, 4.0, 6.0, 1.0, 7.0], 'red')
 s.plot('series2', [0.0, 3.0, 7.0, 9.3, 2.0], 'green')
@@ -88,7 +88,7 @@ s.title "Arbitrary data"
 ###############################
 
 s = Tk::Tcllib::Plotchart::Barchart.new(hc2, %w(A B C D E), 
-					[0.0, 20.0, 5.0], :stacked)
+                                        [0.0, 20.0, 5.0], :stacked)
 
 s.plot('series1', [1.0, 4.0, 6.0, 1.0, 7.0], 'red')
 s.plot('series2', [0.0, 3.0, 7.0, 9.3, 2.0], 'green')
@@ -97,7 +97,7 @@ s.title "Stacked diagram"
 ###############################
 
 s = Tk::Tcllib::Plotchart::HorizontalBarchart.new(vc1, [0.0, 10.0, 2.0], 
-						  %w(A B C D E), 2)
+                                                  %w(A B C D E), 2)
 
 s.plot('series1', [1.0, 4.0, 6.0, 1.0, 7.0], 'red')
 s.plot('series2', [0.0, 3.0, 7.0, 9.3, 2.0], 'green')
@@ -106,7 +106,7 @@ s.title "Arbitrary data"
 ###############################
 
 s = Tk::Tcllib::Plotchart::HorizontalBarchart.new(vc2, [0.0, 20.0, 5.0], 
-						  %w(A B C D E), :stacked)
+                                                  %w(A B C D E), :stacked)
 
 s.plot('series1', [1.0, 4.0, 6.0, 1.0, 7.0], 'red')
 s.plot('series2', [0.0, 3.0, 7.0, 9.3, 2.0], 'green')
@@ -115,7 +115,7 @@ s.title "Stacked diagram"
 ###############################
 
 s = Tk::Tcllib::Plotchart::Timechart.new(vc3, "1 january 2004", 
-					      "31 december 2004", 4)
+                                              "31 december 2004", 4)
 
 s.period("Spring", "1 march 2004", "1 june 2004", 'green')
 s.period("Summer", "1 june 2004", "1 september 2004", 'yellow')
@@ -135,7 +135,7 @@ zc2 = TkCanvas.new(z, :background=>'white', :width=>400, :height=>250)
 Tk.pack(zc1,zc2)
 
 s = Tk::Tcllib::Plotchart::Plot3D.new(zc1, 
-				      [0, 10, 3], [-10, 10, 10], [0, 10, 2.5])
+                                      [0, 10, 3], [-10, 10, 10], [0, 10, 2.5])
 
 s.title "3D Plot"
 s.plot_function{|x, y|
@@ -146,12 +146,12 @@ s.plot_function{|x, y|
 }
 
 s = Tk::Tcllib::Plotchart::Plot3D.new(zc2, 
-				      [0, 10, 3], [-10, 10, 10], [0, 10, 2.5])
+                                      [0, 10, 3], [-10, 10, 10], [0, 10, 2.5])
 s.title "3D Plot - data "
 s.colour("green", "black")
 s.plot_data([ [1.0, 2.0, 1.0, 0.0], 
-	      [1.1, 3.0, 1.1, -0.5], 
-	      [3.0, 1.0, 4.0, 5.0] ])
+              [1.1, 3.0, 1.1, -0.5], 
+              [3.0, 1.0, 4.0, 5.0] ])
 
 ###############################
 
diff --git a/ext/tk/sample/tkextlib/tcllib/plotdemos2.rb b/ext/tk/sample/tkextlib/tcllib/plotdemos2.rb
index 3fd57f380..33a6f2994 100644
--- a/ext/tk/sample/tkextlib/tcllib/plotdemos2.rb
+++ b/ext/tk/sample/tkextlib/tcllib/plotdemos2.rb
@@ -13,21 +13,21 @@ Tk.pack(c1,c2, :fill=>:both, :side=>:top)
 # Set up a strip chart
 ###############################
 slipchart = Tk::Tcllib::Plotchart::Stripchart.new(c1, [0.0, 100.0, 10.0], 
-						      [0.0, 100.0, 20.0])
+                                                      [0.0, 100.0, 20.0])
 
 TkTimer.new(500, -1, proc{|obj| # obj --> TkTimer object
-	      slipchart, xold, xd, yold, yd = obj.return_value
-	      xnew = xold + xd
-	      ynew = yold + (rand() - 0.5) * yd
-	      ynew2 = yold + (rand() - 0.5) * 2.0 * yd
-	      slipchart.plot('series1', xnew, ynew)
-	      slipchart.plot('series2', xnew, ynew2)
-	      obj.stop if xnew >= 200
-	      [slipchart, xnew, xd, ynew, yd] # return_value
-	    }).start(100, proc{
-		       # init return_value
-		       [slipchart, 0.0, 15.0, 50.0, 30.0]
-		     })
+              slipchart, xold, xd, yold, yd = obj.return_value
+              xnew = xold + xd
+              ynew = yold + (rand() - 0.5) * yd
+              ynew2 = yold + (rand() - 0.5) * 2.0 * yd
+              slipchart.plot('series1', xnew, ynew)
+              slipchart.plot('series2', xnew, ynew2)
+              obj.stop if xnew >= 200
+              [slipchart, xnew, xd, ynew, yd] # return_value
+            }).start(100, proc{
+                       # init return_value
+                       [slipchart, 0.0, 15.0, 50.0, 30.0]
+                     })
 
 slipchart.title "Aha!"
 
@@ -35,7 +35,7 @@ slipchart.title "Aha!"
 # Set up an isometric plot
 ###############################
 s = Tk::Tcllib::Plotchart::IsometricPlot.new(c2, [0.0, 100.0], [0.0, 200.0], 
-					     :noaxes)
+                                             :noaxes)
 
 s.set_zoom_pan
 
@@ -51,7 +51,7 @@ h = TkToplevel.new(:title=>'h')
 c = TkCanvas.new(h, :bg=>'white', :width=>400, :height=>200).pack(:fill=>:both)
 
 s = Tk::Tcllib::Plotchart::XYPlot.new(c, [0.0, 100.0, 10.0], 
-				         [0.0, 100.0, 20.0]) 
+                                         [0.0, 100.0, 20.0]) 
 s.dataconfig('series1', :colour=>'red',   :type=>:symbol)
 s.dataconfig('series2', :colour=>'green', :type=>:both)
 
diff --git a/ext/tk/sample/tkextlib/tcllib/plotdemos3.rb b/ext/tk/sample/tkextlib/tcllib/plotdemos3.rb
index 3b74b1f59..2b5c7642b 100644
--- a/ext/tk/sample/tkextlib/tcllib/plotdemos3.rb
+++ b/ext/tk/sample/tkextlib/tcllib/plotdemos3.rb
@@ -8,9 +8,9 @@ require 'tkextlib/tcllib/plotchart'
 ###############################
 
 Tk::Tcllib::Plotchart::Stripchart.new([0.0, 100.0, 10.0], 
-				      [0.0, 100.0, 20.0], 
-				      :background=>'white', 
-				      :width=>400, :height=>200){|chart|
+                                      [0.0, 100.0, 20.0], 
+                                      :background=>'white', 
+                                      :width=>400, :height=>200){|chart|
   title "Aha!"
   pack(:fill=>:both, :side=>:top)
 
@@ -21,26 +21,26 @@ Tk::Tcllib::Plotchart::Stripchart.new([0.0, 100.0, 10.0],
   yd = 30.0
 
   TkTimer.new(500, -1, proc{|obj| # obj --> TkTimer object
-		xold, yold = obj.return_value
-		xnew = xold + xd
-		ynew = yold + (rand() - 0.5) * yd
-		ynew2 = yold + (rand() - 0.5) * 2.0 * yd
+                xold, yold = obj.return_value
+                xnew = xold + xd
+                ynew = yold + (rand() - 0.5) * yd
+                ynew2 = yold + (rand() - 0.5) * 2.0 * yd
 
-		series1.plot(xnew, ynew)
-		series2.plot(xnew, ynew2)
+                series1.plot(xnew, ynew)
+                series2.plot(xnew, ynew2)
 
-		obj.stop if xnew >= 200
+                obj.stop if xnew >= 200
 
-		[xnew, ynew] # return_value
-	      }).start(100, proc{ [0.0, 50.0] }) # init return_value
+                [xnew, ynew] # return_value
+              }).start(100, proc{ [0.0, 50.0] }) # init return_value
 }
 
 ###############################
 # Set up an isometric plot
 ###############################
 Tk::Tcllib::Plotchart::IsometricPlot.new([0.0, 100.0], [0.0, 200.0], :noaxes, 
-					 :background=>'white', 
-					 :width=>400, :height=>200){|chart|
+                                         :background=>'white', 
+                                         :width=>400, :height=>200){|chart|
   pack(:fill=>:both, :side=>:top)
   set_zoom_pan
 
@@ -55,17 +55,17 @@ Tk::Tcllib::Plotchart::IsometricPlot.new([0.0, 100.0], [0.0, 200.0], :noaxes,
 ###############################
 TkToplevel.new(:title=>'h'){|h|
   Tk::Tcllib::Plotchart::XYPlot.new(h, [0.0, 100.0, 10.0], 
-				       [0.0, 100.0, 20.0], 
-				    :bg=>'white', 
-				    :width=>400, :height=>200){|chart|
+                                       [0.0, 100.0, 20.0], 
+                                    :bg=>'white', 
+                                    :width=>400, :height=>200){|chart|
     pack(:fill=>:both)
 
     yconfig(:format=>"%12.2e")
 
     series1 = Tk::Tcllib::Plotchart::PlotSeries.new(chart, :colour=>'red', 
-						    :type=>:symbol)
+                                                    :type=>:symbol)
     series2 = Tk::Tcllib::Plotchart::PlotSeries.new(chart, :colour=>'green', 
-						    :type=>:both)
+                                                    :type=>:both)
 
     x = 5.0
     %w(plus cross circle up down dot upfilled downfilled).each{|sym|
diff --git a/ext/tk/sample/tkextlib/tcllib/xyplot.rb b/ext/tk/sample/tkextlib/tcllib/xyplot.rb
index 116609e34..8f8c3eb88 100644
--- a/ext/tk/sample/tkextlib/tcllib/xyplot.rb
+++ b/ext/tk/sample/tkextlib/tcllib/xyplot.rb
@@ -6,7 +6,7 @@ require 'tkextlib/tcllib/plotchart'
 TkCanvas.new(:background=>'white', :width=>400, :height=>200){|c|
   pack(:fill=>:both)
   Tk::Tcllib::Plotchart::XYPlot.new(c, [0.0, 100.0, 10.0], 
-				       [0.0, 100.0, 20.0]){
+                                       [0.0, 100.0, 20.0]){
     [ [0.0, 32.0], [10.0, 50.0], [25.0, 60.0], [78.0, 11.0] ].each{|x, y|
       plot('series1', x, y)
     }
diff --git a/ext/tk/sample/tkextlib/tkHTML/hv.rb b/ext/tk/sample/tkextlib/tkHTML/hv.rb
index cf93ad3ba..d9f3ea7d7 100644
--- a/ext/tk/sample/tkextlib/tkHTML/hv.rb
+++ b/ext/tk/sample/tkextlib/tkHTML/hv.rb
@@ -130,12 +130,12 @@ applet_cmd = proc{|w, arglist|
 # Construct the main HTML viewer
 #
 html = Tk::HTML_Widget.new(:padx=>5, :pady=>9, 
-			   :formcommand=>form_cmd, 
-			   :imagecommand=>image_cmd, 
-			   :scriptcommand=>script_cmd, 
-			   :appletcommand=>applet_cmd, 
-			   :underlinehyperlinks=>0, 
-			   :bg=>'white', :tablerelief=>:raised)
+                           :formcommand=>form_cmd, 
+                           :imagecommand=>image_cmd, 
+                           :scriptcommand=>script_cmd, 
+                           :appletcommand=>applet_cmd, 
+                           :underlinehyperlinks=>0, 
+                           :bg=>'white', :tablerelief=>:raised)
 vscr = html.yscrollbar(TkScrollbar.new)
 hscr = html.xscrollbar(TkScrollbar.new)
 
@@ -162,7 +162,7 @@ read_file = proc{|name|
     ret = nil
     fp = nil
     Tk.messageBox(:icon=>'error', :message=>"fail to open '#{name}'", 
-		  :type=>:ok)
+                  :type=>:ok)
   ensure
     fp.close if fp
   end
@@ -212,15 +212,15 @@ html.clipping_window.bind('1', href_binding, '%x %y')
 
 # marking text with the mouse and copying to the clipboard just with tkhtml2.0 working
 html.clipping_window.bind('B1-Motion', proc{|w, x, y|
-			    w.selection_set(priv['mark'], "@#{x},#{y}")
-			    TkClipboard.clear
-			    # avoid tkhtml0.0 errors 
-			    # anyone can fix this for tkhtml0.0
-			    begin
-			      TkClipboard.append(TkSelection.get)
-			    rescue
-			    end
-			  }, '%W %x %y')
+                            w.selection_set(priv['mark'], "@#{x},#{y}")
+                            TkClipboard.clear
+                            # avoid tkhtml0.0 errors 
+                            # anyone can fix this for tkhtml0.0
+                            begin
+                              TkClipboard.append(TkSelection.get)
+                            rescue
+                            end
+                          }, '%W %x %y')
 
 # This procedure is called when the user selects the File/Open
 # menu option.
@@ -249,14 +249,14 @@ refresh = proc{|*args|
 # top of a hyperlink.
 #
 Tk::HTML_Widget::ClippingWindow.bind('Motion', proc{|w, x, y|
-				       parent = w.winfo_parent
-				       url = parent.href(x, y)
-				       unless url.empty?
-					 parent[:cursor] = 'hand2'
-				       else
-					 parent[:cursor] = ''
-				       end
-				     }, '%W %x %y')
+                                       parent = w.winfo_parent
+                                       url = parent.href(x, y)
+                                       unless url.empty?
+                                         parent[:cursor] = 'hand2'
+                                       else
+                                         parent[:cursor] = ''
+                                       end
+                                     }, '%W %x %y')
 #
 # Setup menu
 #
@@ -279,18 +279,18 @@ mbar = Tk.root.add_menubar(menu_spec)
 # Setup trace
 #
 ul_hyper.trace('w', proc{ 
-		 html[:underlinehyperlinks] = ul_hyper.value
-		 refresh.call
-	       })
+                 html[:underlinehyperlinks] = ul_hyper.value
+                 refresh.call
+               })
 
 show_tbl.trace('w', proc{
-		 if show_tbl.bool
-		   html[:tablerelief] = :flat
-		 else
-		   html[:tablerelief] = :raised
-		 end
-		 refresh.call
-	       })
+                 if show_tbl.bool
+                   html[:tablerelief] = :flat
+                 else
+                   html[:tablerelief] = :raised
+                 end
+                 refresh.call
+               })
 
 show_img.trace('w', refresh)
 
diff --git a/ext/tk/sample/tkextlib/tkHTML/ss.rb b/ext/tk/sample/tkextlib/tkHTML/ss.rb
index e71c26f7d..179bdc13c 100644
--- a/ext/tk/sample/tkextlib/tkHTML/ss.rb
+++ b/ext/tk/sample/tkextlib/tkHTML/ss.rb
@@ -198,7 +198,7 @@ read_file = proc{|name|
     ret = nil
     fp = nil
     Tk.messageBox(:icon=>'error', :message=>"fail to open '#{name}'", 
-		  :type=>:ok)
+                  :type=>:ok)
   ensure
     fp.close if fp
   end
@@ -291,20 +291,20 @@ fullscreen = proc{
   width  =  root.winfo_screenwidth
   height =  root.winfo_screenheight
   fswin = TkToplevel.new(:overrideredirect=>true, 
-			 :geometry=>"#{width}x#{height}+0+0")
+                         :geometry=>"#{width}x#{height}+0+0")
 
   html_fs = Tk::HTML_Widget.new(fswin, :padx=>5, :pady=>9, 
-				:formcommand=>form_cmd, 
-				:imagecommand=>proc{image_cmd.call(0)}, 
-				:scriptcommand=>script_cmd, 
-				:appletcommand=>applet_cmd, 
-				:hyperlinkcommand=>hyper_cmd, 
-				:bg=>'white', :tablerelief=>:raised, 
-				:appletcommand=>proc{|*args|
-				  run_applet('big', *args)
-				}, 
-				:fontcommand=>pick_font_fs, 
-				:cursor=>:tcross) {
+                                :formcommand=>form_cmd, 
+                                :imagecommand=>proc{image_cmd.call(0)}, 
+                                :scriptcommand=>script_cmd, 
+                                :appletcommand=>applet_cmd, 
+                                :hyperlinkcommand=>hyper_cmd, 
+                                :bg=>'white', :tablerelief=>:raised, 
+                                :appletcommand=>proc{|*args|
+                                  run_applet('big', *args)
+                                }, 
+                                :fontcommand=>pick_font_fs, 
+                                :cursor=>:tcross) {
     pack(:fill=>:both, :expand=>true)
     token_handler('meta', proc{|*args| meta.call(self, *args)})
   }
@@ -361,19 +361,19 @@ menu_spec = [
 mbar = root.add_menubar(menu_spec)
 
 html = Tk::HTML_Widget.new(:width=>512, :height=>384, 
-			   :padx=>5, :pady=>9, 
-			   :formcommand=>form_cmd, 
-			   :imagecommand=>proc{|*args| 
-			     image_cmd.call(1, *args)
-			   }, 
-			   :scriptcommand=>script_cmd, 
-			   :appletcommand=>applet_cmd, 
-			   :hyperlinkcommand=>hyper_cmd, 
-			   :fontcommand=>pick_font, 
-			   :appletcommand=>proc{|*args|
-			     run_applet.call('small', *args)
-			   }, 
-			   :bg=>'white', :tablerelief=>:raised)
+                           :padx=>5, :pady=>9, 
+                           :formcommand=>form_cmd, 
+                           :imagecommand=>proc{|*args| 
+                             image_cmd.call(1, *args)
+                           }, 
+                           :scriptcommand=>script_cmd, 
+                           :appletcommand=>applet_cmd, 
+                           :hyperlinkcommand=>hyper_cmd, 
+                           :fontcommand=>pick_font, 
+                           :appletcommand=>proc{|*args|
+                             run_applet.call('small', *args)
+                           }, 
+                           :bg=>'white', :tablerelief=>:raised)
 
 html.token_handler('meta', proc{|*args| meta.call(html, *args)})
 
diff --git a/ext/tk/sample/tkextlib/tktable/basic.rb b/ext/tk/sample/tkextlib/tktable/basic.rb
index a7dfe2a78..ece46b318 100644
--- a/ext/tk/sample/tkextlib/tktable/basic.rb
+++ b/ext/tk/sample/tkextlib/tktable/basic.rb
@@ -23,19 +23,19 @@ cols = 8
 lbl = TkLabel.new(:text=>"TkTable v1 Example")
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :variable=>ary, 
-			:width=>6, :height=>6, 
-			:titlerows=>1, :titlecols=>2, 
-			:roworigin=>-1, :colorigin=>-2, 
-			:rowstretchmode=>:last, :colstretchmode=>:last,
-			:rowtagcommand=>proc{|row|
-			  row = Integer(row)
-			  return 'OddRow' if row>0 && row%2 == 1
-			}, 
-			:coltagcommand=>proc{|col|
-			  col = Integer(col)
-			  return 'OddCol' if col>0 && col%2 == 1
-			}, 
-			:selectmode=>:extended, :sparsearray=>false)
+                        :width=>6, :height=>6, 
+                        :titlerows=>1, :titlecols=>2, 
+                        :roworigin=>-1, :colorigin=>-2, 
+                        :rowstretchmode=>:last, :colstretchmode=>:last,
+                        :rowtagcommand=>proc{|row|
+                          row = Integer(row)
+                          return 'OddRow' if row>0 && row%2 == 1
+                        }, 
+                        :coltagcommand=>proc{|col|
+                          col = Integer(col)
+                          return 'OddCol' if col>0 && col%2 == 1
+                        }, 
+                        :selectmode=>:extended, :sparsearray=>false)
 
 sx = table.xscrollbar(TkScrollbar.new)
 sy = table.yscrollbar(TkScrollbar.new)
diff --git a/ext/tk/sample/tkextlib/tktable/buttons.rb b/ext/tk/sample/tkextlib/tktable/buttons.rb
index b6995bb54..b21e8673c 100644
--- a/ext/tk/sample/tkextlib/tktable/buttons.rb
+++ b/ext/tk/sample/tkextlib/tktable/buttons.rb
@@ -15,11 +15,11 @@ rows = 20
 cols = 20
 
 table = Tk::TkTable.new(:rows=>rows + 1, :cols=>cols + 1, 
-			:variable=>tab, :titlerows=>1, :titlecols=>1, 
-			:roworigin=>-1, :colorigin=>-1, 
-			:colwidth=>4, :width=>8, :height=>8, 
-			:cursor=>'top_left_arrow', :borderwidth=>2, 
-			:flashmode=>false, :state=>:disabled)
+                        :variable=>tab, :titlerows=>1, :titlecols=>1, 
+                        :roworigin=>-1, :colorigin=>-1, 
+                        :colwidth=>4, :width=>8, :height=>8, 
+                        :cursor=>'top_left_arrow', :borderwidth=>2, 
+                        :flashmode=>false, :state=>:disabled)
 
 sx = table.xscrollbar(TkScrollbar.new)
 sy = table.yscrollbar(TkScrollbar.new)
@@ -40,25 +40,25 @@ table.bind('Leave', proc{|w| w.selection_clear_all}, '%W')
 
 # highlight the cell under the mouse
 table.bind('Motion', proc{|w, x, y|
-	     Tk.callback_break if w.selection_include?(TkComm._at(x,y))
-	     w.selection_clear_all
-	     w.selection_set(TkComm._at(x,y))
-	     Tk.callback_break
-	     ## "break" prevents the call to tkTableCheckBorder
-	   }, '%W %x %y')
+             Tk.callback_break if w.selection_include?(TkComm._at(x,y))
+             w.selection_clear_all
+             w.selection_set(TkComm._at(x,y))
+             Tk.callback_break
+             ## "break" prevents the call to tkTableCheckBorder
+           }, '%W %x %y')
 
 # mousebutton 1 toggles the value of the cell
 # use of "selection includes" would work here
 table.bind('1', proc{|w, x, y|
-	     #rc = w.curselection[0]
-	     rc = w.index(TkComm._at(x,y))
-	     if tab[rc] == 'ON'
-	       tab[rc] = 'OFF'
-	       w.tag_cell('OFF', rc)
-	     else
-	       tab[rc] = 'ON'
-	       w.tag_cell('ON', rc)
-	     end}, '%W %x %y')
+             #rc = w.curselection[0]
+             rc = w.index(TkComm._at(x,y))
+             if tab[rc] == 'ON'
+               tab[rc] = 'OFF'
+               w.tag_cell('OFF', rc)
+             else
+               tab[rc] = 'ON'
+               w.tag_cell('ON', rc)
+             end}, '%W %x %y')
 
 
 # inititialize the array, titles, and celltags
diff --git a/ext/tk/sample/tkextlib/tktable/command.rb b/ext/tk/sample/tkextlib/tktable/command.rb
index 950bc0ccb..eb9ddffb7 100644
--- a/ext/tk/sample/tkextlib/tktable/command.rb
+++ b/ext/tk/sample/tkextlib/tktable/command.rb
@@ -28,44 +28,44 @@ ent_var = TkVariable.new
 entry = TkEntry.new(:textvariable=>ent_var)
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, 
-			:command=>[proc{|mode, cell, val|
-			  if (mode == :w)
-			    data[cell] = val
-			  else
-			    begin
-			      data[cell]  # exist
-			    rescue
-			      ''          # not exist
-			    end
-			  end
-			}, '%i %C %s'], 
-			:width=>6, :height=>6, 
-			:titlerows=>1, :titlecols=>1, 
-			:roworigin=>-1, :colorigin=>-1, 
-			:rowstretchmode=>:last, :colstretchmode=>:last,
-			:rowtagcommand=>proc{|row|
-			  row = Integer(row)
-			  return 'OddRow' if row>0 && row%2 == 1
-			},
-			:coltagcommand=>proc{|col|
-			  col = Integer(col)
-			  return 'OddCol' if col>0 && col%2 == 1
-			}, 
-			:selectmode=>:extended, :flashmode=>true, 
-			:rowstretch=>:unset, :colstretch=>:unset,
-			:browsecommand=>[proc{|w, s|
-			  cur_var.value = s
-			  ent_var.value = w.get(s)
-			}, '%W %S'], 
-			:validate=>true, 
-			:validatecommand=>proc{|e| 
-			  ent_var.value = e.new_value; true
-			})
+                        :command=>[proc{|mode, cell, val|
+                          if (mode == :w)
+                            data[cell] = val
+                          else
+                            begin
+                              data[cell]  # exist
+                            rescue
+                              ''          # not exist
+                            end
+                          end
+                        }, '%i %C %s'], 
+                        :width=>6, :height=>6, 
+                        :titlerows=>1, :titlecols=>1, 
+                        :roworigin=>-1, :colorigin=>-1, 
+                        :rowstretchmode=>:last, :colstretchmode=>:last,
+                        :rowtagcommand=>proc{|row|
+                          row = Integer(row)
+                          return 'OddRow' if row>0 && row%2 == 1
+                        },
+                        :coltagcommand=>proc{|col|
+                          col = Integer(col)
+                          return 'OddCol' if col>0 && col%2 == 1
+                        }, 
+                        :selectmode=>:extended, :flashmode=>true, 
+                        :rowstretch=>:unset, :colstretch=>:unset,
+                        :browsecommand=>[proc{|w, s|
+                          cur_var.value = s
+                          ent_var.value = w.get(s)
+                        }, '%W %S'], 
+                        :validate=>true, 
+                        :validatecommand=>proc{|e| 
+                          ent_var.value = e.new_value; true
+                        })
 =begin
-			:validatecommand=>[
-			  proc{|s| 
-			    ent_var.value = s; true
-			  }, '%S'])
+                        :validatecommand=>[
+                          proc{|s| 
+                            ent_var.value = s; true
+                          }, '%S'])
 =end
 
 sx = table.xscrollbar(TkScrollbar.new)
diff --git a/ext/tk/sample/tkextlib/tktable/debug.rb b/ext/tk/sample/tkextlib/tktable/debug.rb
index 30508acea..3200c1c77 100644
--- a/ext/tk/sample/tkextlib/tktable/debug.rb
+++ b/ext/tk/sample/tkextlib/tktable/debug.rb
@@ -24,16 +24,16 @@ cols = 20
 lbl = TkLabel.new(:text=>"TkTable v2 Example")
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :variable=>ary, 
-			:width=>6, :height=>6, 
-			:titlerows=>1, :titlecols=>2, 
-			:roworigin=>-5, :colorigin=>-2, 
-			:coltagcommand=>proc{|col|
-			  col = Integer(col)
-			  return 'OddCol' if col>0 && col%2 == 1
-			}, 
-			:selectmode=>:extended, :flashmode=>true, 
-			:rowstretch=>:unset, :colstretch=>:unset,
-			:selecttitles=>false, :drawmode=>:single)
+                        :width=>6, :height=>6, 
+                        :titlerows=>1, :titlecols=>2, 
+                        :roworigin=>-5, :colorigin=>-2, 
+                        :coltagcommand=>proc{|col|
+                          col = Integer(col)
+                          return 'OddCol' if col>0 && col%2 == 1
+                        }, 
+                        :selectmode=>:extended, :flashmode=>true, 
+                        :rowstretch=>:unset, :colstretch=>:unset,
+                        :selecttitles=>false, :drawmode=>:single)
 
 sx = table.xscrollbar(TkScrollbar.new)
 sy = table.yscrollbar(TkScrollbar.new)
@@ -68,8 +68,8 @@ table.tag_cell('dis', [2,1], [1,-1], [3,0])
 table.set_width([-2,8], [-1,9], [0, 12], [4, 14])
 
 table.set([1,1], "multi-line\ntext\nmight be\ninteresting", 
-	  [3,2], "more\nmulti-line\nplaying\n", 
-	  [2,2], "null\0byte")
+          [3,2], "more\nmulti-line\nplaying\n", 
+          [2,2], "null\0byte")
 
 # This is in the row span
 l = TkLabel.new(table, :text=>'Window s', :bg=>'yellow')
diff --git a/ext/tk/sample/tkextlib/tktable/dynarows.rb b/ext/tk/sample/tkextlib/tktable/dynarows.rb
index 35359046f..d083e2655 100644
--- a/ext/tk/sample/tkextlib/tktable/dynarows.rb
+++ b/ext/tk/sample/tkextlib/tktable/dynarows.rb
@@ -25,21 +25,21 @@ def table_validate(w, idx)
     time = Tk.tk_call('clock', 'scan', val)
     date = []
     Tk.tk_call('clock', 'format', time, 
-	       :format=>'%m %d %Y').split(' ').each{|item|
+               :format=>'%m %d %Y').split(' ').each{|item|
       date << item.sub(/^\s*0*/,'')
     }
     w.set(idx, date.join('/'))
     if row == nrows - 1
       if w.get([row,1]) != '' && w.get([row,2]) != ''
-	w.tag_row_reset(row)
-	w.set([row,0], row)
-	nrows += 1
-	row += 1
-	w.configure(:rows=>nrows)
-	w.tag_row('unset', row)
-	w.set([row,0], '*')
-	w.see([row,1])
-	w.activate([row,1])
+        w.tag_row_reset(row)
+        w.set([row,0], row)
+        nrows += 1
+        row += 1
+        w.configure(:rows=>nrows)
+        w.tag_row('unset', row)
+        w.set([row,0], '*')
+        w.see([row,1])
+        w.activate([row,1])
       end
     end
   rescue
@@ -55,13 +55,13 @@ end
 lbl = TkLabel.new(:text=>"Dynamic Date Validated Rows")
 
 table = Tk::TkTable.new(:rows=>2, :cols=>3, :cache=>1, :selecttype=>:row, 
-			:titlerows=>1, :titlecols=>1, :height=>5, 
-			:colstretch=>:unset, :rowstretch=>:unset, 
-			:autoclear=>true, 
-			:browsecommand=>[
-			  proc{|w,s| table_validate(w, s)}, 
-			  '%W %s'
-			])
+                        :titlerows=>1, :titlecols=>1, :height=>5, 
+                        :colstretch=>:unset, :rowstretch=>:unset, 
+                        :autoclear=>true, 
+                        :browsecommand=>[
+                          proc{|w,s| table_validate(w, s)}, 
+                          '%W %s'
+                        ])
 table.set([0,1], 'Begin', [0,2], 'End', [1,0], '*')
 table.tag_configure('unset', :fg=>'#008811')
 table.tag_configure('title', :fg=>'red')
diff --git a/ext/tk/sample/tkextlib/tktable/maxsize.rb b/ext/tk/sample/tkextlib/tktable/maxsize.rb
index a2c5f606a..c9ca745ee 100644
--- a/ext/tk/sample/tkextlib/tktable/maxsize.rb
+++ b/ext/tk/sample/tkextlib/tktable/maxsize.rb
@@ -24,15 +24,15 @@ cols = 10
 lbl = TkLabel.new(:text=>"TkTable v2 Example")
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :variable=>ary, 
-			:width=>6, :height=>8, 
-			:titlerows=>1, :titlecols=>1, 
-			:coltagcommand=>proc{|col|
-			  col = Integer(col)
-			  return 'OddCol' if col>0 && col%2 == 1
-			}, 
-			:selectmode=>:extended, 
-			:colstretch=>:unset, :rowstretch=>:unset, 
-			:selecttitles=>false, :drawmode=>:slow)
+                        :width=>6, :height=>8, 
+                        :titlerows=>1, :titlecols=>1, 
+                        :coltagcommand=>proc{|col|
+                          col = Integer(col)
+                          return 'OddCol' if col>0 && col%2 == 1
+                        }, 
+                        :selectmode=>:extended, 
+                        :colstretch=>:unset, :rowstretch=>:unset, 
+                        :selecttitles=>false, :drawmode=>:slow)
 
 sx = table.xscrollbar(TkScrollbar.new)
 sy = table.yscrollbar(TkScrollbar.new)
diff --git a/ext/tk/sample/tkextlib/tktable/spreadsheet.rb b/ext/tk/sample/tkextlib/tktable/spreadsheet.rb
index 5f3ba63bb..9da896f5a 100644
--- a/ext/tk/sample/tkextlib/tktable/spreadsheet.rb
+++ b/ext/tk/sample/tkextlib/tktable/spreadsheet.rb
@@ -31,11 +31,11 @@ def fill_table(tbl_list, page, r=10, c=10)
   (0...r).each{|i|
     (0...c).each{|j|
       if i!=0 && j!=0
-	ary[i,j] = "#{page} #{i},#{j}"
+        ary[i,j] = "#{page} #{i},#{j}"
       elsif i!=0
-	ary[i,j] = i.to_s
+        ary[i,j] = i.to_s
       else
-	ary[i,j] = (64+j).chr
+        ary[i,j] = (64+j).chr
       end
     }
   }
@@ -68,16 +68,16 @@ fill_table(table_list, page.value)
 fill_table(table_list, 'BB', Integer(rows/2), Integer(cols/2))
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :width=>5, :height=>5, 
-			:variable=>table_list[page.value], 
-			:titlerows=>1, :titlecols=>1, 
-			:coltagcommand=>proc{|n| colorize(n)},
-			:flashmode=>true, :selectmode=>:extended, 
-			:colstretch=>:unset, :rowstretch=>:unset, 
-			:browsecommand=>proc{|e| cur_var.value = e.new_index})
+                        :variable=>table_list[page.value], 
+                        :titlerows=>1, :titlecols=>1, 
+                        :coltagcommand=>proc{|n| colorize(n)},
+                        :flashmode=>true, :selectmode=>:extended, 
+                        :colstretch=>:unset, :rowstretch=>:unset, 
+                        :browsecommand=>proc{|e| cur_var.value = e.new_index})
 
 page.trace(:w, proc{|var, elem, op| 
-	     changepage(table_list, table, entry, color, var, elem, op)
-	   })
+             changepage(table_list, table, entry, color, var, elem, op)
+           })
 
 table.tag_configure('colored', :bg=>color[page.value])
 table.tag_configure('title',   :fg=>'red', :relief=>:groove)
@@ -107,29 +107,29 @@ Tk.root.grid_rowconfig(2, :weight=>1)
 table.grid_configure(:sticky=>:news)
 
 entry.bind('Return', proc{
-	     r = table.row_index(:active)
-	     c = table.col_index(:active)
-	     rmax = table[:rows]
-	     cmax = table[:cols]
-
-	     c += 1
-	     if c == cmax
-	       c = table[:titlecols]
-	       r += 1
-	       if r == rmax
-		 r = table[:titlerows]
-	       end
-	     end
-	     table.activate([r, c])
-	     table.see('active')
-	   })
+             r = table.row_index(:active)
+             c = table.col_index(:active)
+             rmax = table[:rows]
+             cmax = table[:cols]
+
+             c += 1
+             if c == cmax
+               c = table[:titlecols]
+               r += 1
+               if r == rmax
+                 r = table[:titlerows]
+               end
+             end
+             table.activate([r, c])
+             table.see('active')
+           })
 
 menu = TkMenu.new
 m_file = TkMenu.new(menu)
 Tk.root.menu(menu)
 menu.add(:cascade, :label=>'File', :underline=>0, :menu=>m_file)
 m_file.add(:command, :label=>'Fill Array', 
-	   :command=>proc{ fill_table(table_list, page.value) })
+           :command=>proc{ fill_table(table_list, page.value) })
 m_file.add(:command, :label=>'Quit', :command=>proc{exit})
 
 puts "Table is #{table.path} with array #{(table['variable'])}"
diff --git a/ext/tk/sample/tkextlib/tktable/valid.rb b/ext/tk/sample/tkextlib/tktable/valid.rb
index 457044166..e5d3f11d8 100644
--- a/ext/tk/sample/tkextlib/tktable/valid.rb
+++ b/ext/tk/sample/tkextlib/tktable/valid.rb
@@ -54,15 +54,15 @@ end
 lbl = TkLabel.new(:text=>"TkTable v1 Validated Table Example")
 
 table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :cache=>1, 
-			:width=>5, :height=>5, :titlerows=>1, :titlecols=>1, 
-			:coltagcommand=>proc{|n| colorize(n)},
-			:flashmode=>true, :selectmode=>:extended, 
-			:colstretch=>:unset, :rowstretch=>:unset, 
-			:validate=>true, 
-			:validatecommand=>proc{|e|
-			  unless e.widget.tag_include?('title', e.index)
-			    validate_proc(e.column, e.new_value)
-			  end } )
+                        :width=>5, :height=>5, :titlerows=>1, :titlecols=>1, 
+                        :coltagcommand=>proc{|n| colorize(n)},
+                        :flashmode=>true, :selectmode=>:extended, 
+                        :colstretch=>:unset, :rowstretch=>:unset, 
+                        :validate=>true, 
+                        :validatecommand=>proc{|e|
+                          unless e.widget.tag_include?('title', e.index)
+                            validate_proc(e.column, e.new_value)
+                          end } )
 
 fill_headers(table)
 
diff --git a/ext/tk/sample/tkextlib/vu/canvItems.rb b/ext/tk/sample/tkextlib/vu/canvItems.rb
index c3e563058..33acf4f7e 100644
--- a/ext/tk/sample/tkextlib/vu/canvItems.rb
+++ b/ext/tk/sample/tkextlib/vu/canvItems.rb
@@ -10,63 +10,63 @@ xbm = File.join(File.dirname(File.expand_path(__FILE__)), 'm128_000.xbm')
 sval = [ 11, 22, 33, 44, 55, 66, 77, 88, 99 ]
 
 l0 = TkLabel.new(:width=>128, :height=>128, 
-		 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
+                 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
 
 c0 = TkCanvas.new(:width=>80, :height=>80, 
-		  :insertwidth=>0, :highlightthickness=>0, 
-		  :selectborderwidth=>0, :borderwidth=>2, 
-		  :relief=>:ridge).place(:in=>l0, :relx=>0.5, :rely=>0.5, 
-					 :anchor=>:c)
+                  :insertwidth=>0, :highlightthickness=>0, 
+                  :selectborderwidth=>0, :borderwidth=>2, 
+                  :relief=>:ridge).place(:in=>l0, :relx=>0.5, :rely=>0.5, 
+                                         :anchor=>:c)
 
 st = Tk::Vu::TkcStripchart.new(c0, 3, 3, 80, 80, 
-			       :background=>"#b7c0d7", :fill=>'slategray3', 
-			       :jumpscroll=>1, :outline=>'black', 
-			       :scaleline=>'blue', :stripline=>'red', 
-			       :selected=>1, :values=>sval)
+                               :background=>"#b7c0d7", :fill=>'slategray3', 
+                               :jumpscroll=>1, :outline=>'black', 
+                               :scaleline=>'blue', :stripline=>'red', 
+                               :selected=>1, :values=>sval)
 
 TkcText.create(c0, 40, 40, 
-	       :text=>Tk::TCL_PATCHLEVEL, :fill=>'cyan', :tags=>'text')
+               :text=>Tk::TCL_PATCHLEVEL, :fill=>'cyan', :tags=>'text')
 
 
 l1 = TkLabel.new(:width=>128, :height=>128, 
-		 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
+                 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
 
 c1 = TkCanvas.new(:width=>80, :height=>80, 
-		  :insertwidth=>0, :highlightthickness=>0, 
-		  :selectborderwidth=>0, :borderwidth=>2, 
-		  :relief=>:ridge).place(:in=>l1, :relx=>0.5, :rely=>0.5, 
-					 :anchor=>:c)
+                  :insertwidth=>0, :highlightthickness=>0, 
+                  :selectborderwidth=>0, :borderwidth=>2, 
+                  :relief=>:ridge).place(:in=>l1, :relx=>0.5, :rely=>0.5, 
+                                         :anchor=>:c)
 
 bar1 = Tk::Vu::TkcBarchart.new(c1, 3, 3, 80, 80, 
-			       :background=>"#b7c0d7", :scalevalue=>10.0, 
-			       :autocolor=>true, :selected=>1, 
-			       :outline=>'black', :barline=>'yellow', 
-			       :scalelinestyle=>0)
+                               :background=>"#b7c0d7", :scalevalue=>10.0, 
+                               :autocolor=>true, :selected=>1, 
+                               :outline=>'black', :barline=>'yellow', 
+                               :scalelinestyle=>0)
 
 bar2 = Tk::Vu::TkcBarchart.new(c1, 53, 3, 80, 80, 
-			       :background=>"#b7c0d7", :scalevalue=>10.0, 
-			       :autocolor=>true, :selected=>1, 
-			       :outline=>'black', :fill=>"#b7c0d7", 
-			       :barline=>'red', :scalelinestyle=>22)
+                               :background=>"#b7c0d7", :scalevalue=>10.0, 
+                               :autocolor=>true, :selected=>1, 
+                               :outline=>'black', :fill=>"#b7c0d7", 
+                               :barline=>'red', :scalelinestyle=>22)
 
 
 l2 = TkLabel.new(:width=>128, :height=>128, 
-		 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
+                 :bitmap=>"@#{xbm}", :relief=>:groove).pack(:side=>:left)
 
 c2 = TkCanvas.new(:width=>80, :height=>80, 
-		  :insertwidth=>0, :highlightthickness=>0, 
-		  :selectborderwidth=>0, :borderwidth=>2, 
-		  :relief=>:ridge).place(:in=>l2, :relx=>0.5, :rely=>0.5, 
-					 :anchor=>:c)
+                  :insertwidth=>0, :highlightthickness=>0, 
+                  :selectborderwidth=>0, :borderwidth=>2, 
+                  :relief=>:ridge).place(:in=>l2, :relx=>0.5, :rely=>0.5, 
+                                         :anchor=>:c)
 
 begin
   stick = Tk::Vu::TkcSticker.new(c2, 3, 3, 80, 80, 
-				 :text=>"Tcl/Tk", :space=>0, :color=>'red', 
-				 :outline=>'red', :font=>'Helvetica 14 bold', 
-				 :fill=>'', :stipple=>'', :bar=>'blue', 
-				 :orient=>:vertical, :anchor=>:s, 
-				 :relheight=>1.0, :relwidth=>0.15, 
-				 :relx=>0.1, :rely=>0.0)
+                                 :text=>"Tcl/Tk", :space=>0, :color=>'red', 
+                                 :outline=>'red', :font=>'Helvetica 14 bold', 
+                                 :fill=>'', :stipple=>'', :bar=>'blue', 
+                                 :orient=>:vertical, :anchor=>:s, 
+                                 :relheight=>1.0, :relwidth=>0.15, 
+                                 :relx=>0.1, :rely=>0.0)
 rescue
   stick = nil
   TkcText.new(c2, 40, 10, :text=>"No Sticker Item")
diff --git a/ext/tk/sample/tkextlib/vu/canvSticker.rb b/ext/tk/sample/tkextlib/vu/canvSticker.rb
index 431ca56fd..e2cd60497 100644
--- a/ext/tk/sample/tkextlib/vu/canvSticker.rb
+++ b/ext/tk/sample/tkextlib/vu/canvSticker.rb
@@ -15,7 +15,7 @@ begin
   st = Tk::Vu::TkcSticker.new(c, 0, 0, 10, 10)
 rescue
   Tk.messageBox(:type=>'ok', :title=>"No sticker Item", 
-		:message=>"This build of vu does not include the sticker item")
+                :message=>"This build of vu does not include the sticker item")
   exit
 end
 #st.delete
@@ -57,7 +57,7 @@ steps << proc{
 steps << proc{
   puts 'A vertical bar appears in the lower right region and text jumps to the left.'
   st.configure(:anchor=>:n, :relw=>0.3, :relh=>0.7, 
-	       :relx=>0.6, :rely=>0.3, :bar=>'red')
+               :relx=>0.6, :rely=>0.3, :bar=>'red')
 }
 
 steps << proc{
diff --git a/ext/tk/sample/tkextlib/vu/canvSticker2.rb b/ext/tk/sample/tkextlib/vu/canvSticker2.rb
index 1e6b59a18..f54e74866 100644
--- a/ext/tk/sample/tkextlib/vu/canvSticker2.rb
+++ b/ext/tk/sample/tkextlib/vu/canvSticker2.rb
@@ -11,7 +11,7 @@ begin
   st = Tk::Vu::TkcSticker.new(c, 0, 0, 10, 10)
 rescue
   Tk.messageBox(:type=>'ok', :title=>"No sticker Item", 
-		:message=>"This build of vu does not include the sticker item")
+                :message=>"This build of vu does not include the sticker item")
   exit
 end
 
@@ -21,7 +21,7 @@ c.destroy
 #--- set STRING {{x0 y0 x1 y1} {...text...} {resize point: center}
 
 #sti_conf = [ [10, 10, 180, 180], "Sticker äöüß@²³¼½¾",  :center ]
-#txt_conf = [ [210, 210], 	 "Text    äöüß@²³¼½¾",  :center ]
+#txt_conf = [ [210, 210],        "Text    äöüß@²³¼½¾",  :center ]
 sti_conf = [ [10, 10, 350, 350], 
              Tk::UTF8_String("Sticker äöüß@²³¼½¾"),  :center ]
 txt_conf = [ [250, 250],
@@ -65,32 +65,32 @@ txt = TkcText.new(c, txt_conf[0]){
   anchor          txt_conf[2]
   disabledfill    ''
   disabledstipple ''
-  fill	          'blue'
-  font	          fnt
+  fill            'blue'
+  font            fnt
   justify         :left
   offset          '0,0'
   state           ''
   stipple         ''
-  tags	          ['tex']
+  tags            ['tex']
   text            txt_conf[1]
   width           0
 }
 
 #---BINDINGS
 c.bind('2', proc{
-	 sti[:orient] = :horizontal
-	 txt[:width] = 0  # horizontal
+         sti[:orient] = :horizontal
+         txt[:width] = 0  # horizontal
        })
 
 c.bind('3', proc{
-	 sti[:orient] = :vertical
-	 txt[:width] = 1  # top down
+         sti[:orient] = :vertical
+         txt[:width] = 1  # top down
        })
 
 Tk.root.bind('p', proc{
-	       c.postscript(:file=>'DEMO.ps')
-	       puts "DEMO.ps printed"
-	     })
+               c.postscript(:file=>'DEMO.ps')
+               puts "DEMO.ps printed"
+             })
 
 Tk.root.bind('q', proc{exit})
 
diff --git a/ext/tk/sample/tkextlib/vu/dial.rb b/ext/tk/sample/tkextlib/vu/dial.rb
index d2ae0990c..09bd3e918 100644
--- a/ext/tk/sample/tkextlib/vu/dial.rb
+++ b/ext/tk/sample/tkextlib/vu/dial.rb
@@ -13,61 +13,61 @@ v_linked = TkVariable.new
 v_needle = TkVariable.new
 
 volume = Tk::Vu::Dial.new(:label=>"Volume", :from=>-0.1, :to=>0.1, 
-			  :resolution=>0.001, :minortickinterval=>0.01, 
-			  :tickinterval=>0.1, :beginangle=>-20, 
-			  :endangle=>260, :variable=>v_volume)
+                          :resolution=>0.001, :minortickinterval=>0.01, 
+                          :tickinterval=>0.1, :beginangle=>-20, 
+                          :endangle=>260, :variable=>v_volume)
 
 speed = Tk::Vu::Dial.new(:label=>"Speed", :from=>2000, :to=>100, 
-			 :resolution=>10, :tickinterval=>100, 
-			 :minortickinterval=>0, :variable=>v_speed, 
-			 :showtags=>:label, :showvalue=>false)
+                         :resolution=>10, :tickinterval=>100, 
+                         :minortickinterval=>0, :variable=>v_speed, 
+                         :showtags=>:label, :showvalue=>false)
 
 speed.set_tag_constrain(100, 'Fast', 2000, 'Slow')
 
 fwd  = Tk::Vu::Dial.new(:from=>-10.0, :to=>-20.0, :resolution=>0.1, 
-			:tickinterval=>5.0, :minortickinterval=>1.0, 
-			:variable=>v_dir)
+                        :tickinterval=>5.0, :minortickinterval=>1.0, 
+                        :variable=>v_dir)
 
 rev  = Tk::Vu::Dial.new(:from=>-20.0, :to=>-10.0, :resolution=>0.1, 
-			:tickinterval=>5.0, :minortickinterval=>1.0, 
-			:variable=>v_dir)
+                        :tickinterval=>5.0, :minortickinterval=>1.0, 
+                        :variable=>v_dir)
 
 small = Tk::Vu::Dial.new(:font=>"Helvetica -10", :from=>0, :to=>10, 
-			 :resolution=>0.05, :tickinterval=>2,
-			 :minortickinterval=>0.5, :radius=>20, 
-			 :dialcolor=>'red2', :activebackground=>'red', 
-			 :variable=>v_rot)
+                         :resolution=>0.05, :tickinterval=>2,
+                         :minortickinterval=>0.5, :radius=>20, 
+                         :dialcolor=>'red2', :activebackground=>'red', 
+                         :variable=>v_rot)
 
 large = Tk::Vu::Dial.new(:font=>"Helvetica -8", :from=>0, :to=>10, 
-			 :resolution=>0.05, :tickinterval=>1,
-			 :minortickinterval=>0.25, :radius=>40, 
-			 :dialcolor=>'red2', :activebackground=>'red', 
-			 :variable=>v_rot)
+                         :resolution=>0.05, :tickinterval=>1,
+                         :minortickinterval=>0.25, :radius=>40, 
+                         :dialcolor=>'red2', :activebackground=>'red', 
+                         :variable=>v_rot)
 
 turn = Tk::Vu::Dial.new(:needlecolor=>'red', :label=>"Linked", 
-			:variable=>v_linked)
+                        :variable=>v_linked)
 
 scale = TkScale.new(:label=>"Linked", :variable=>v_linked)
 
 d1 = Tk::Vu::Dial.new(:resolution=>0.0001, :from=>-0.1, :to=>0.1, 
-		      :showvalue=>true, :minortickinterval=>0.01, 
-		      :tickinterval=>0.1, :radius=>30, :label=>"Dial", 
-		      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
-		      :relief=>:raised)
+                      :showvalue=>true, :minortickinterval=>0.01, 
+                      :tickinterval=>0.1, :radius=>30, :label=>"Dial", 
+                      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
+                      :relief=>:raised)
 
 d2 = Tk::Vu::Dial.new(:resolution=>0.01, :from=>-0.1, :to=>0.1, 
-		      :showvalue=>true, :minortickinterval=>0.01, 
-		      :tickinterval=>0.1, :radius=>30, :label=>"Dial 2", 
-		      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
-		      :dialrelief=>:flat, :needlecolor=>'red', 
-		      :needletype=>:triangle, :relief=>:sunken)
+                      :showvalue=>true, :minortickinterval=>0.01, 
+                      :tickinterval=>0.1, :radius=>30, :label=>"Dial 2", 
+                      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
+                      :dialrelief=>:flat, :needlecolor=>'red', 
+                      :needletype=>:triangle, :relief=>:sunken)
 
 d3 = Tk::Vu::Dial.new(:resolution=>0.001, :from=>-0.1, :to=>0.1, 
-		      :showvalue=>true, :minortickinterval=>0.01, 
-		      :tickinterval=>0.1, :radius=>30, :label=>"Dial 3", 
-		      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
-		      :dialrelief=>:flat, :needlecolor=>'blue', 
-		      :needletype=>:arc, :relief=>:ridge)
+                      :showvalue=>true, :minortickinterval=>0.01, 
+                      :tickinterval=>0.1, :radius=>30, :label=>"Dial 3", 
+                      :beginangle=>-20, :endangle=>260, :variable=>v_needle, 
+                      :dialrelief=>:flat, :needlecolor=>'blue', 
+                      :needletype=>:arc, :relief=>:ridge)
 
 f_btns = TkFrame.new
 f_sep  = TkFrame.new(:height=>2, :relief=>:sunken, :bd=>1)
@@ -77,12 +77,12 @@ v_volume.value = -0.1
 v_speed.value = 500
 
 update = TkTimer.new(proc{v_speed.numeric}, -1, proc{
-		       if v_volume == volume[:to]
-			 v_volume.numeric = volume[:from]
-		       else
-			 v_volume.numeric += volume[:resolution]
-		       end
-		     })
+                       if v_volume == volume[:to]
+                         v_volume.numeric = volume[:from]
+                       else
+                         v_volume.numeric += volume[:resolution]
+                       end
+                     })
 
 b_start = TkButton.new(:text=>"Start", :command=>proc{update.start})
 b_stop  = TkButton.new(:text=>"Stop",  :command=>proc{update.stop})
diff --git a/ext/tk/sample/tkextlib/vu/oscilloscope.rb b/ext/tk/sample/tkextlib/vu/oscilloscope.rb
index 43254c9b2..2015e4664 100644
--- a/ext/tk/sample/tkextlib/vu/oscilloscope.rb
+++ b/ext/tk/sample/tkextlib/vu/oscilloscope.rb
@@ -23,43 +23,43 @@ c = TkCanvas.new(:width=>220, :height=>190).pack(:fill=>:both, :expand=>true)
 
 #---background
 TkcRectangle.new(c, geo_fr, :width=>4, :fill=>'aquamarine3', 
-		 :tags=>['osc', 'frbg'])
+                 :tags=>['osc', 'frbg'])
 
 #---channel 0
 ch0 = Tk::Vu::TkcStripchart.new(c, geo_ch0, 
-				:fill=>'', :jumpscroll=>false, 
-				:outline=>'', :scaleline=>'', 
-				:stripline=>'cyan', :tags=>['osc', 'ch0'])
+                                :fill=>'', :jumpscroll=>false, 
+                                :outline=>'', :scaleline=>'', 
+                                :stripline=>'cyan', :tags=>['osc', 'ch0'])
 
 #---channel 1
 ch1 = Tk::Vu::TkcStripchart.new(c, geo_ch1, 
-				:fill=>'', :jumpscroll=>0, 
-				:outline=>'', :scaleline=>'', 
-				:stripline=>'red', :tags=>['osc', 'ch1'])
+                                :fill=>'', :jumpscroll=>0, 
+                                :outline=>'', :scaleline=>'', 
+                                :stripline=>'red', :tags=>['osc', 'ch1'])
 
 #---frame
 TkcRectangle.new(c, geo_fr, :width=>4, :tags=>['osc', 'frfg'])
 
 #---position
 txt1 = TkcText.new(c, geo_t1, :text=>"B1-Motion: X:%X\tY:%Y", 
-		   :anchor=>:nw, :tags=>['osc', 'txt1'])
+                   :anchor=>:nw, :tags=>['osc', 'txt1'])
 
 #---BINDINGS
 c.bind('B1-Motion', proc{|x, y, xx, yy|
-	 ch0[:values] = x
-	 ch1[:values] = y
-	 txt1[:text] = "B1-Motion: X:#{xx}\tY:#{yy}"
+         ch0[:values] = x
+         ch1[:values] = y
+         txt1[:text] = "B1-Motion: X:#{xx}\tY:#{yy}"
        }, '%x %y %X %Y')
 
 Tk.root.bind('v', proc{
-	       puts ch0[:values].join(' ')
-	       puts ch0[:values].size
-	     })
+               puts ch0[:values].join(' ')
+               puts ch0[:values].size
+             })
 
 Tk.root.bind('p', proc{
-	       c.postscript(:file=>'DEMO.ps')
-	       puts "DEMO.ps printed"
-	     })
+               c.postscript(:file=>'DEMO.ps')
+               puts "DEMO.ps printed"
+             })
 
 Tk.root.bind('q', proc{exit})
 
diff --git a/ext/tk/sample/tkextlib/vu/pie.rb b/ext/tk/sample/tkextlib/vu/pie.rb
index a567f840a..ed598d623 100644
--- a/ext/tk/sample/tkextlib/vu/pie.rb
+++ b/ext/tk/sample/tkextlib/vu/pie.rb
@@ -27,7 +27,7 @@ Tk.grid(pie, :sticky=>:news)
 Tk.grid(f, :sticky=>:ew)
 
 Tk.pack(fast_btn, slow_btn, quit_btn, 
-	:in=>f, :side=>:left, :fill=>:both, :expand=>true, :padx=>6, :pady=>4)
+        :in=>f, :side=>:left, :fill=>:both, :expand=>true, :padx=>6, :pady=>4)
 
 Tk.root.grid_columnconfigure(0, :weight=>1)
 Tk.root.grid_rowconfigure(0, :weight=>1)
@@ -37,20 +37,20 @@ priv = {
 }
 
 pie.bind('ButtonPress-1', proc{|w, x, y|
-	     priv[:x] = x
-	     priv[:y] = y
-	     priv[:pie_in] = (w.winfo_width/1.8 > x)
-	     priv[:angle]  = w[:angle]
-	     priv[:origin] = w[:origin]
-	 }, '%W %x %y')
+             priv[:x] = x
+             priv[:y] = y
+             priv[:pie_in] = (w.winfo_width/1.8 > x)
+             priv[:angle]  = w[:angle]
+             priv[:origin] = w[:origin]
+         }, '%W %x %y')
 
 pie.bind('B1-Motion', proc{|w, x, y|
-	   if priv[:pie_in]
-	     w.configure(:angle=>priv[:angle] + (priv[:y] - y)/3, 
-			 :origin=>(priv[:origin] + 
-				   ((w.winfo_height/2.2 > y)? -1: 1) * 
-				   (priv[:x] - x)/3) % 360)
-	   end
-	 }, '%W %x %y')
+           if priv[:pie_in]
+             w.configure(:angle=>priv[:angle] + (priv[:y] - y)/3, 
+                         :origin=>(priv[:origin] + 
+                                   ((w.winfo_height/2.2 > y)? -1: 1) * 
+                                   (priv[:x] - x)/3) % 360)
+           end
+         }, '%W %x %y')
 
 Tk.mainloop
diff --git a/ext/tk/sample/tkextlib/vu/vu.rb b/ext/tk/sample/tkextlib/vu/vu.rb
index df9a7f38a..d078ae16f 100644
--- a/ext/tk/sample/tkextlib/vu/vu.rb
+++ b/ext/tk/sample/tkextlib/vu/vu.rb
@@ -10,13 +10,13 @@ puts "Show off barchart and dial widgets"
 speed = TkVariable.new(0)
 
 dial = Tk::Vu::Dial.new(:resolution=>0.001, :from=>-0.1, :to=>0.1, 
-			:showvalue=>true, :minortickinterval=>0.01, 
-			:tickinterval=>0.1, :radius=>50, :label=>"Dial", 
-			:beginangle=>-20, :endangle=>260, :dialcolor=>'red3', 
-			:active=>'red2', :variable=>speed)
+                        :showvalue=>true, :minortickinterval=>0.01, 
+                        :tickinterval=>0.1, :radius=>50, :label=>"Dial", 
+                        :beginangle=>-20, :endangle=>260, :dialcolor=>'red3', 
+                        :active=>'red2', :variable=>speed)
 
 bar = Tk::Vu::Bargraph.new(:from=>0, :to=>100, :relief=>:groove, 
-			   :border=>2, :label=>"Bar Chart")
+                           :border=>2, :label=>"Bar Chart")
 
 #######################################
 
@@ -30,24 +30,24 @@ def rand_bool
 end
 
 update = TkTimer.new(200, -1, proc{
-		       if (rand() - 0.5 + speed.numeric * 3) > 0
-			 current += 1
-		       else
-			 current -= 1
-		       end
-		       bar.set(current)
-		       if current < green
-			 current = 100 if current <= 0
-			 bar[:barcolor] = 'green'
-		       elsif current < blue
-			 bar[:barcolor] = 'blue'
-		       elsif current < purple
-			 bar[:barcolor] = 'purple'
-		       else
-			 bar[:barcolor] = 'red'
-			 current = 0 if current >= 100
-		       end
-		     })
+                       if (rand() - 0.5 + speed.numeric * 3) > 0
+                         current += 1
+                       else
+                         current -= 1
+                       end
+                       bar.set(current)
+                       if current < green
+                         current = 100 if current <= 0
+                         bar[:barcolor] = 'green'
+                       elsif current < blue
+                         bar[:barcolor] = 'blue'
+                       elsif current < purple
+                         bar[:barcolor] = 'purple'
+                       else
+                         bar[:barcolor] = 'red'
+                         current = 0 if current >= 100
+                       end
+                     })
 
 #######################################
 
@@ -61,7 +61,7 @@ Tk.grid('x', nobar, :sticky=>:ew, :padx=>4, :pady=>4)
 Tk.grid(quit, '-', '-', :sticky=>:ew, :padx=>4, :pady=>4)
 Tk.root.grid_columnconfigure(2, :weight=>1)
 Tk.root.grid_rowconfigure(1, :weight=>1)
-		       
+                       
 #######################################
 
 Tk.mainloop