added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 124 insertions, 0 deletions

diff --git a/trunk/ext/tk/sample/demos-en/plot.rb b/trunk/ext/tk/sample/demos-en/plot.rb
new file mode 100644
index 0000000000..628c9df584
--- /dev/null
+++ b/trunk/ext/tk/sample/demos-en/plot.rb
@@ -0,0 +1,124 @@
+# plot.rb
+#
+# This demonstration script creates a canvas widget showing a 2-D
+# plot with data points that can be dragged with the mouse.
+#
+# 2-D plot widget demo (called by 'widget')
+#
+
+# toplevel widget
+if defined?($plot_demo) && $plot_demo
+  $plot_demo.destroy 
+  $plot_demo = nil
+end
+
+# demo toplevel widget
+$plot_demo = TkToplevel.new {|w|
+  title("Plot Demonstration")
+  iconname("Plot")
+  positionWindow(w)
+}
+
+base_frame = TkFrame.new($plot_demo).pack(:fill=>:both, :expand=>true)
+
+# label
+TkLabel.new(base_frame, 'font'=>$font, 'wraplength'=>'4i', 'justify'=>'left', 
+            'text'=>"This window displays a canvas widget containing a simple 2-dimensional plot.  You can doctor the data by dragging any of the points with mouse button 1."){
+  pack('side'=>'top')
+}
+
+# frame
+$plot_buttons = TkFrame.new(base_frame) {|frame|
+  TkButton.new(frame) {
+    text 'Dismiss'
+    command proc{
+      tmppath = $plot_demo
+      $plot_demo = nil
+      tmppath.destroy
+    }
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+  TkButton.new(frame) {
+    text 'Show Code'
+    command proc{showCode 'plot'}
+  }.pack('side'=>'left', 'expand'=>'yes')
+}
+$plot_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
+
+# font 
+plotFont = '-*-Helvetica-Medium-R-Normal--*-180-*-*-*-*-*-*'
+
+# canvas 
+$plot_canvas = TkCanvas.new(base_frame,'relief'=>'raised','width'=>450,'height'=>300)
+$plot_canvas.pack('side'=>'top', 'fill'=>'x')
+
+# plot 
+TkcLine.new($plot_canvas, 100, 250, 400, 250, 'width'=>2)
+TkcLine.new($plot_canvas, 100, 250, 100,  50, 'width'=>2)
+TkcText.new($plot_canvas, 225, 20, 
+            'text'=>"A Simple Plot", 'font'=>plotFont, 'fill'=>'brown')
+
+(0..10).each {|i|
+  x = 100 + (i * 30)
+  TkcLine.new($plot_canvas, x, 250, x, 245, 'width'=>2)
+  TkcText.new($plot_canvas, x, 254, 
+              'text'=>10*i, 'font'=>plotFont, 'anchor'=>'n')
+}
+(0..5).each {|i|
+  y = 250 - (i * 40)
+  TkcLine.new($plot_canvas, 100, y, 105, y, 'width'=>2)
+  TkcText.new($plot_canvas, 96, y, 
+              'text'=>"#{i*50}.0", 'font'=>plotFont, 'anchor'=>'e')
+}
+
+for xx, yy in [[12,56],[20,94],[33,98],[32,120],[61,180],[75,160],[98,223]]
+  x = 100 + (3*xx)
+  y = 250 - (4*yy)/5
+  item = TkcOval.new($plot_canvas, x-6, y-6, x+6, y+6, 
+                     'width'=>1, 'outline'=>'black', 'fill'=>'SkyBlue2')
+  item.addtag 'point'
+end
+
+$plot_canvas.itembind('point', 'Any-Enter', 
+                      proc{$plot_canvas.itemconfigure 'current','fill','red'})
+$plot_canvas.itembind('point', 'Any-Leave', 
+                      proc{$plot_canvas.itemconfigure 'current','fill','SkyBlue2'})
+$plot_canvas.itembind('point', '1', 
+                      proc{|x,y| plotDown $plot_canvas,x,y}, "%x %y")
+$plot_canvas.itembind('point', 'ButtonRelease-1', 
+                      proc{$plot_canvas.dtag 'selected'})
+$plot_canvas.bind('B1-Motion', 
+                  proc{|x,y| plotMove $plot_canvas,x,y}, "%x %y")
+
+$plot = {'lastX'=>0, 'lastY'=>0}
+
+# plotDown --
+# This method is invoked when the mouse is pressed over one of the 
+# data points.  It sets up state to allow the point to be dragged.
+#
+# Arguments:
+# w -           The canvas window.
+# x, y -        The coordinates of the mouse press.
+
+def plotDown (w, x, y)
+  w.dtag 'selected'
+  w.addtag_withtag 'selected', 'current'
+  w.raise 'current'
+  $plot['lastX'] = x
+  $plot['lastY'] = y
+end
+
+# plotMove --
+# This method is invoked during mouse motion events.  It drags the
+# current item.
+#
+# Arguments:
+# w -           The canvas window.
+# x, y -        The coordinates of the mouse.
+
+def plotMove (w, x, y)
+  w.move 'selected', x - $plot['lastX'], y - $plot['lastY']
+  $plot['lastX'] = x
+  $plot['lastY'] = y
+end
+