1 files changed, 68 insertions, 0 deletions
diff --git a/ruby_1_8_5/ext/tk/sample/tkextlib/vu/oscilloscope.rb b/ruby_1_8_5/ext/tk/sample/tkextlib/vu/oscilloscope.rb
new file mode 100644
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+++ b/ruby_1_8_5/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