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/demos-en/puzzle.rb | 134 ++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 jni/ruby/ext/tk/sample/demos-en/puzzle.rb

(limited to 'jni/ruby/ext/tk/sample/demos-en/puzzle.rb')

diff --git a/jni/ruby/ext/tk/sample/demos-en/puzzle.rb b/jni/ruby/ext/tk/sample/demos-en/puzzle.rb
new file mode 100644
index 0000000..f16414a
--- /dev/null
+++ b/jni/ruby/ext/tk/sample/demos-en/puzzle.rb
@@ -0,0 +1,134 @@
+# 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)
+}
+
+base_frame = TkFrame.new($puzzle_demo).pack(:fill=>:both, :expand=>true)
+
+# label
+msg = TkLabel.new(base_frame) {
+  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(base_frame) {|frame|
+  TkButton.new(frame) {
+    text 'Dismiss'
+    command proc{
+      tmppath = $puzzle_demo
+      $puzzle_demo = nil
+      tmppath.destroy
+    }
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+  TkButton.new(frame) {
+    text 'Show Code'
+    command proc{showCode 'puzzle'}
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
+
+# frame
+
+# Special trick: select a darker color for the space by creating a
+# scrollbar widget and using its trough color.
+begin
+  if Tk.windowingsystem() == 'aqua'
+    frameWidth  = 168
+    frameHeight = 168
+  elsif Tk.default_widget_set == :Ttk
+    frameWidth  = 148
+    frameHeight = 124
+  else
+    frameWidth  = 120
+    frameHeight = 120
+  end
+rescue
+  frameWidth  = 120
+  frameHeight = 120
+end
+
+# depend_on_button_width = true
+depend_on_button_width = false
+
+s = TkScrollbar.new(base_frame)
+base = TkFrame.new(base_frame) {
+  width  frameWidth
+  height frameHeight
+  borderwidth 2
+  relief 'sunken'
+  bg s['troughcolor']
+}
+s.destroy
+base.pack('side'=>'top', 'padx'=>'1c', 'pady'=>'1c')
+
+def def_puzzleswitch_proc(w, num)
+  proc{puzzleSwitch w, num}
+end
+
+$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
+  $ypos[num] = (i / 4) * 0.25
+  TkButton.new(base) {|w|
+    relief 'raised'
+    text num
+    highlightthickness 0
+    command def_puzzleswitch_proc(w, num)
+    if depend_on_button_width && (w.winfo_reqwidth * 4 > base.width)
+      base.width = w.winfo_reqwidth * 4
+    end
+  }.place('relx'=>$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
+
-- 
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