* renewal Ruby/Tk

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6237 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/sample/binding_sample.rb

@@ -0,0 +1,87 @@
+#!/usr/bin/env ruby
+
+require 'tk'
+
+class Button_clone < TkLabel
+  def initialize(*args)
+    @command = nil
+
+    if args[-1].kind_of?(Hash)
+      keys = _symbolkey2str(args.pop)
+      @command = keys.delete('command')
+
+      keys['highlightthickness'] = 1 unless keys.key?('highlightthickness')
+      keys['padx'] = '3m' unless keys.key?('padx')
+      keys['pady'] = '1m' unless keys.key?('pady')
+      keys['relief'] = 'raised' unless keys.key?('relief')
+
+      args.push(keys)
+    end
+
+    super(*args)
+
+    @press = false
+
+    self.bind('Enter', proc{self.background(self.activebackground)})
+    self.bind('Leave', proc{
+		@press = false
+		self.background(self.highlightbackground)
+		self.relief('raised')
+	      })
+
+    self.bind('ButtonPress-1', proc{@press = true; self.relief('sunken')})
+    self.bind('ButtonRelease-1', proc{
+		self.relief('raised')
+		@command.call if @press && @command
+		@press = false
+	      })
+  end
+
+  def command(cmd = Proc.new)
+    @command = cmd
+  end
+
+  def invoke
+    if @command
+      @command.call 
+    else
+      ''
+    end
+  end
+end
+
+TkLabel.new(:text=><<EOT).pack
+This is a sample of 'event binding'.
+The first button is a normal button widget.
+And the second one is a normal label widget 
+but with some bindings like a button widget.
+EOT
+
+lbl = TkLabel.new(:foreground=>'red').pack(:pady=>3)
+
+v = TkVariable.new(0)
+
+TkFrame.new{|f|
+  TkLabel.new(f, :text=>'click count : ').pack(:side=>:left)
+  TkLabel.new(f, :textvariable=>v).pack(:side=>:left)
+}.pack
+
+TkButton.new(:text=>'normal Button widget', 
+	     :command=>proc{
+	       puts 'button is clicked!!'
+	       lbl.text 'button is clicked!!'
+	       v.numeric += 1
+	     }){
+  pack(:fill=>:x, :expand=>true)
+}
+
+Button_clone.new(:text=>'Label with Button binding', 
+		 :command=>proc{
+		   puts 'label is clicked!!'
+		   lbl.text 'label is clicked!!'
+		   v.numeric += 1
+		 }){
+  pack(:fill=>:x, :expand=>true)
+}
+
+Tk.mainloop