7 files changed, 19 insertions, 1 deletions
diff --git a/ext/tk/sample/tkextlib/bwidget/LICENSE.orig b/ext/tk/sample/tkextlib/bwidget/LICENSE.orig
index 4238e4387..0c4c16fe4 100644
--- a/ext/tk/sample/tkextlib/bwidget/LICENSE.orig
+++ b/ext/tk/sample/tkextlib/bwidget/LICENSE.orig
@@ -5,7 +5,7 @@
   ###  Original Tcl source files are not include in this directry,   ###
   ###  because of all of them are rewrited to Ruby files.            ###
   ###  However, the bitmap data files ('bwidgtet.xbm' and 'x1.xbm')  ###
-  ###  included in this directory are referd from BWidget source     ###
+  ###  included in this directory are quoted from BWidget source     ###
   ###  archive. So, those bitmaps are under the following license.   ###
   ######################################################################
 
diff --git a/ext/tk/sample/tkextlib/bwidget/basic.rb b/ext/tk/sample/tkextlib/bwidget/basic.rb
index 09a29b99a..f622c142e 100644
--- a/ext/tk/sample/tkextlib/bwidget/basic.rb
+++ b/ext/tk/sample/tkextlib/bwidget/basic.rb
@@ -1,6 +1,9 @@
 #
 #  basic demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoBasic
   @@var   = TkVariable.new_hash
diff --git a/ext/tk/sample/tkextlib/bwidget/dnd.rb b/ext/tk/sample/tkextlib/bwidget/dnd.rb
index 9938b4b09..fd6cc40dd 100644
--- a/ext/tk/sample/tkextlib/bwidget/dnd.rb
+++ b/ext/tk/sample/tkextlib/bwidget/dnd.rb
@@ -1,6 +1,9 @@
 #
 #  dnd demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoDnD
   def self.create(nb)
diff --git a/ext/tk/sample/tkextlib/bwidget/manager.rb b/ext/tk/sample/tkextlib/bwidget/manager.rb
index 2935a2651..65bbe0f9e 100644
--- a/ext/tk/sample/tkextlib/bwidget/manager.rb
+++ b/ext/tk/sample/tkextlib/bwidget/manager.rb
@@ -1,6 +1,9 @@
 #
 #  manager demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoManager
   @@progress    = TkVariable.new(false)
diff --git a/ext/tk/sample/tkextlib/bwidget/select.rb b/ext/tk/sample/tkextlib/bwidget/select.rb
index e25ab5c35..a04d8da48 100644
--- a/ext/tk/sample/tkextlib/bwidget/select.rb
+++ b/ext/tk/sample/tkextlib/bwidget/select.rb
@@ -1,6 +1,9 @@
 #
 #  select demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoSelect
   @@var = TkVariable.new_hash
diff --git a/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb b/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
index 758924951..1ed84e21a 100644
--- a/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
+++ b/ext/tk/sample/tkextlib/bwidget/tmpldlg.rb
@@ -1,6 +1,9 @@
 #
 #  templdlg demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoDialog
   @@tmpl      = TkVariable.new_hash
diff --git a/ext/tk/sample/tkextlib/bwidget/tree.rb b/ext/tk/sample/tkextlib/bwidget/tree.rb
index 0d9fc3805..9bfa4f3cc 100644
--- a/ext/tk/sample/tkextlib/bwidget/tree.rb
+++ b/ext/tk/sample/tkextlib/bwidget/tree.rb
@@ -1,6 +1,9 @@
 #
 #  templdlg demo  ---  called from demo.rb
 #
+unless Object.const_defined?('DemoVar')
+  fail RuntimeError, "This is NOT a stand alone script. This script is called from 'demo.rb'. "
+end
 
 module DemoTree
   @@count = 0