80 lines
1.9 KiB
Ruby
80 lines
1.9 KiB
Ruby
# vscale.rb
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#
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# This demonstration script shows an example with a vertical scale.
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require "tkcanvas"
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if defined?($vscale_demo) && $vscale_demo
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$vscale_demo.destroy
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$vscale_demo = nil
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end
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$vscale_demo = TkToplevel.new {|w|
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title("Vertical Scale Demonstration")
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iconname("vscale")
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}
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positionWindow($vscale_demo)
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base_frame = TkFrame.new($vscale_demo).pack(:fill=>:both, :expand=>true)
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msg = TkLabel.new(base_frame) {
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font $font
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wraplength '3.5i'
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justify 'left'
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text "An arrow and a vertical scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the size of the arrow."
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}
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msg.pack('side'=>'top', 'padx'=>'.5c')
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TkFrame.new(base_frame) {|frame|
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TkButton.new(frame) {
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text 'Dismiss'
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command proc {
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tmppath = $vscale_demo
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$vscale_demo = nil
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tmppath.destroy
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}
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}.pack('side'=>'left', 'expand'=>'yes')
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TkButton.new(frame) {
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text 'Show Code'
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command proc { showCode 'vscale' }
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}.pack('side'=>'left', 'expand'=>'yes')
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}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
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def setHeight(w, height)
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height = height + 21
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y2 = height - 30
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if y2 < 21
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y2 = 21
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end
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w.coords 'poly',15,20,35,20,35,y2,45,y2,25,height,5,y2,15,y2,15,20
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w.coords 'line',15,20,35,20,35,y2,45,y2,25,height,5,y2,15,y2,15,20
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end
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TkFrame.new(base_frame) {|frame|
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borderwidth 10
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canvas = TkCanvas.new(frame) {|c|
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width 50
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height 50
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bd 0
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highlightthickness 0
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TkcPolygon.new(c, 0, 0, 1, 1, 2, 2) {
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fill 'SeaGreen3'
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tags 'poly'
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}
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TkcLine.new(c, 0, 0, 1, 1, 2, 2, 0, 0) {
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fill 'black'
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tags 'line'
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}
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}.pack('side'=>'left', 'anchor'=>'nw', 'fill'=>'y')
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scale = TkScale.new(frame) {
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orient 'vertical'
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length 284
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from 0
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to 250
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command proc{|value| setHeight(canvas, value)}
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tickinterval 50
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}.pack('side'=>'left', 'anchor'=>'ne')
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scale.set 75
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}.pack
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