From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/ext/tk/sample/binding_sample.rb | 87 ++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 jni/ruby/ext/tk/sample/binding_sample.rb

(limited to 'jni/ruby/ext/tk/sample/binding_sample.rb')

diff --git a/jni/ruby/ext/tk/sample/binding_sample.rb b/jni/ruby/ext/tk/sample/binding_sample.rb
new file mode 100644
index 0000000..3c2eb5e
--- /dev/null
+++ b/jni/ruby/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
-- 
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