1 files changed, 56 insertions, 0 deletions
diff --git a/ext/tk/sample/tkextlib/vu/pie.rb b/ext/tk/sample/tkextlib/vu/pie.rb
new file mode 100644
index 000000000..a567f840a
--- /dev/null
+++ b/ext/tk/sample/tkextlib/vu/pie.rb
@@ -0,0 +1,56 @@
+#!/usr/bin/env ruby
+
+require 'tk'
+require 'tkextlib/vu/pie'
+
+pie = Tk::Vu::Pie.new(:label=>"My Revolving Budget"){
+  itemconfigure('Welfare',   :value=>3.004)
+  itemconfigure('Military',  :value=>7.006)
+  itemconfigure('Transport', :value=>1.6, :explode=>15)
+  itemconfigure('Parks',     :value=>0.9)
+  itemconfigure('Schools',   :value=>2)
+  itemconfigure('Debt',      :value=>4,   :explode=>10)
+
+  configure(:angle=>10, :origin=>90, :shadow=>10)
+}
+
+spin = TkTimer.new(60, -1, proc{|obj|
+  pie.configure(:origin=>pie[:origin] + 1)
+})
+
+f = TkFrame.new
+fast_btn = TkButton.new(f, :text=>"Spin Faster", :command=>proc{spin.start})
+slow_btn = TkButton.new(f, :text=>"Spin Slower", :command=>proc{spin.stop})
+quit_btn = TkButton.new(f, :text=>"Exit", :command=>proc{exit})
+
+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)
+
+Tk.root.grid_columnconfigure(0, :weight=>1)
+Tk.root.grid_rowconfigure(0, :weight=>1)
+
+priv = { 
+  :x=>0, :y=>0, :pie_in=>false, :angle=>pie[:angle], :origin=>pie[:origin]
+}
+
+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')
+
+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')
+
+Tk.mainloop