* (IMPORTANT BUG FIX) scan of event keywords doesn't work on recent

  versions of Tck/Tk
* (bug fix) initialize error of instance variable on TkComposite
* (bug fix) initialize error on encoding-system on MultiTkIp
* (bug fix) trouble on destroying widgets
* (new) add JP and EN version of Ruby/Tk widget demos


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4249 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 111 insertions, 0 deletions

diff --git a/ext/tk/sample/demos-en/puzzle.rb b/ext/tk/sample/demos-en/puzzle.rb
new file mode 100644
index 0000000000..91e4c8c1fb
--- /dev/null
+++ b/ext/tk/sample/demos-en/puzzle.rb
@@ -0,0 +1,111 @@
+# puzzle.rb
+#
+# This demonstration script creates a 15-puzzle game using a collection
+# of buttons.
+#
+# widet demo 'puzzle' (called by 'widget')
+#
+
+# toplevel widget
+if defined?($puzzle_demo) && $puzzle_demo
+  $puzzle_demo.destroy 
+  $puzzle_demo = nil
+end
+
+# demo toplevel widget
+$puzzle_demo = TkToplevel.new {|w|
+  title("15-Puzzle Demonstration")
+  iconname("15-Puzzle")
+  positionWindow(w)
+}
+
+# label
+msg = TkLabel.new($puzzle_demo) {
+  font $font
+  wraplength '4i'
+  justify 'left'
+  text "A 15-puzzle appears below as a collection of buttons.  Click on any of the pieces next to the space, and that piece will slide over the space.  Continue this until the pieces are arranged in numerical order from upper-left to lower-right."
+}
+msg.pack('side'=>'top')
+
+# frame
+TkFrame.new($puzzle_demo) {|frame|
+  TkButton.new(frame) {
+    text 'Dismiss'
+    command proc{
+      tmppath = $puzzle_demo
+      $puzzle_demo = nil
+      tmppath.destroy
+    }
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+  TkButton.new(frame) {
+    text 'Show Code'
+    command proc{showCode 'puzzle'}
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
+
+# frame
+
+# Special trick: select a darker color for the space by creating a
+# scrollbar widget and using its trough color.
+ 
+s = TkScrollbar.new($puzzle_demo)
+base = TkFrame.new($puzzle_demo) {
+  width  120
+  height 120
+  borderwidth 2
+  relief 'sunken'
+  bg s['troughcolor']
+}
+s.destroy
+base.pack('side'=>'top', 'padx'=>'1c', 'pady'=>'1c')
+
+def def_puzzleswitch_proc(w, num)
+  proc{puzzleSwitch w, num}
+end
+
+$xpos = {}
+$ypos = {}
+order = [3,1,6,2,5,7,15,13,4,11,8,9,14,10,12]
+(0..14).each{|i|
+  num = order[i]
+  $xpos[num] = (i % 4) * 0.25
+  $ypos[num] = (i / 4) * 0.25
+  TkButton.new(base) {|w|
+    relief 'raised'
+    text num
+    highlightthickness 0
+    command def_puzzleswitch_proc(w, num)
+  }.place('relx'=>$xpos[num], 'rely'=>$ypos[num], 
+	  'relwidth'=>0.25, 'relheight'=>0.25)
+}
+$xpos['space'] = 0.75
+$ypos['space'] = 0.75
+
+
+# puzzleSwitch --
+# This procedure is invoked when the user clicks on a particular button;
+# if the button is next to the empty space, it moves the button into the
+# empty space.
+
+def puzzleSwitch(w, num)
+  if ( ($ypos[num] >= ($ypos['space'] - 0.01))     \
+      && ($ypos[num] <= ($ypos['space'] + 0.01))   \
+      && ($xpos[num] >= ($xpos['space'] - 0.26))   \
+      && ($xpos[num] <= ($xpos['space'] + 0.26)))  \
+    || (($xpos[num] >= ($xpos['space'] - 0.01))    \
+	&& ($xpos[num] <= ($xpos['space'] + 0.01)) \
+	&& ($ypos[num] >= ($ypos['space'] - 0.26)) \
+	&& ($ypos[num] <= ($ypos['space'] + 0.26)))
+    tmp = $xpos['space']
+    $xpos['space'] = $xpos[num]
+    $xpos[num] = tmp
+    tmp = $ypos['space']
+    $ypos['space'] = $ypos[num]
+    $ypos[num] = tmp
+    w.place('relx'=>$xpos[num], 'rely'=>$ypos[num])
+  end
+end
+