* ext/tk/lib/tcltklib : bug fix

* ext/tk/lib/tk : bug fix and add Tcl/Tk extension support libraries


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6559 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/sample/tkextlib/vu/oscilloscope.rb

@@ -0,0 +1,68 @@
+#!/usr/bin/env ruby
+
+require 'tk'
+require 'tkextlib/vu/charts'
+
+#---USAGE
+info = "...the heart of a Realtime Oscilloscope, where the PCIs
+joystick port gives 4 digtal inputs and 4 analog 8 bit
+values with an resolution of ~1 millisecond (!!!)
+running Realtime Linux.
+<p> creates DEMO.ps
+<B1-Motion> see what happens"
+puts info
+
+#---GEOMETRY
+geo_fr  = [10, 10, 210, 180]
+geo_ch0 = [10, 10, 210,  90]
+geo_ch1 = [10, 90, 210, 180]
+geo_t1  = [15, 88]
+
+#---GUI
+c = TkCanvas.new(:width=>220, :height=>190).pack(:fill=>:both, :expand=>true)
+
+#---background
+TkcRectangle.new(c, geo_fr, :width=>4, :fill=>'aquamarine3', 
+		 :tags=>['osc', 'frbg'])
+
+#---channel 0
+ch0 = Tk::Vu::TkcStripchart.new(c, geo_ch0, 
+				:fill=>'', :jumpscroll=>false, 
+				:outline=>'', :scaleline=>'', 
+				:stripline=>'cyan', :tags=>['osc', 'ch0'])
+
+#---channel 1
+ch1 = Tk::Vu::TkcStripchart.new(c, geo_ch1, 
+				:fill=>'', :jumpscroll=>0, 
+				:outline=>'', :scaleline=>'', 
+				:stripline=>'red', :tags=>['osc', 'ch1'])
+
+#---frame
+TkcRectangle.new(c, geo_fr, :width=>4, :tags=>['osc', 'frfg'])
+
+#---position
+txt1 = TkcText.new(c, geo_t1, :text=>"B1-Motion: X:%X\tY:%Y", 
+		   :anchor=>:nw, :tags=>['osc', 'txt1'])
+
+#---BINDINGS
+c.bind('B1-Motion', proc{|x, y, xx, yy|
+	 ch0[:values] = x
+	 ch1[:values] = y
+	 txt1[:text] = "B1-Motion: X:#{xx}\tY:#{yy}"
+       }, '%x %y %X %Y')
+
+Tk.root.bind('v', proc{
+	       puts ch0[:values].join(' ')
+	       puts ch0[:values].size
+	     })
+
+Tk.root.bind('p', proc{
+	       c.postscript(:file=>'DEMO.ps')
+	       puts "DEMO.ps printed"
+	     })
+
+Tk.root.bind('q', proc{exit})
+
+#####################
+
+Tk.mainloop