77 lines
2.7 KiB
Ruby
77 lines
2.7 KiB
Ruby
#
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# text widget peering demo (called by 'widget')
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#
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# based on Tcl/Tk8.5.0 widget demos
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if defined?($textpeer_demo) && $textpeer_demo
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$textpeer_demo.destroy
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$textpeer_demo = nil
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end
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# demo toplevel widget
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$textpeer_demo = TkToplevel.new {|w|
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title("Text Wdget Peering Demonstration")
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iconname("textpeer")
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positionWindow(w)
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}
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base_frame = TkFrame.new($textpeer_demo).pack(:fill=>:both, :expand=>true)
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count = [0]
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## Define a widget that we peer from; it won't ever actually be shown though
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first = TkText.new(base_frame, :widgetname=>"text#{count[0] += 1}")
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first.insert :end,"This is a coupled pair of text widgets; they are peers to "
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first.insert :end,"each other. They have the same underlying data model, but "
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first.insert :end,"can show different locations, have different current edit "
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first.insert :end,"locations, and have different selections. You can also "
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first.insert :end,"create additional peers of any of these text widgets using "
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first.insert :end,"the Make Peer button beside the text widget to clone, and "
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first.insert :end,"delete a particular peer widget using the Delete Peer "
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first.insert :end,"button."
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Tk.update_idletasks ## for 'first' widget
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## Procedures to make and kill clones; most of this is just so that the demo
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## looks nice...
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def makeClone(count, win, txt)
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cnt = (count[0] += 1)
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peer = TkText::Peer.new(txt, win, :widgetname=>"text#{cnt}")
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sbar = TkScrollbar.new(win, :widgetname=>"sb#{cnt}")
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peer.yscrollbar sbar
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b1 = TkButton.new(win, :widgetname=>"clone#{cnt}", :text=>'Make Peer',
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:command=>proc{makeClone(count, win, peer)})
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b2 = TkButton.new(win, :widgetname=>"kill#{cnt}", :text=>'Delete Peer',
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:command=>proc{killClone(win, cnt)})
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row = cnt * 2
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TkGrid.configure(peer, sbar, b1, :sticky=>'nsew', :row=>row)
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TkGrid.configure('^', '^', b2, :sticky=>'nsew', :row=>(row+=1))
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TkGrid.configure(b1, b2, :sticky=>'new')
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TkGrid.rowconfigure(win, b2, :weight=>1)
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end
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def killClone(win, cnt)
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Tk.destroy("#{win.path}.text#{cnt}", "#{win.path}.sb#{cnt}",
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"#{win.path}.clone#{cnt}", "#{win.path}.kill#{cnt}")
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end
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## Now set up the GUI
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makeClone(count, base_frame, first)
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makeClone(count, base_frame, first)
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first.destroy
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## See Code / Dismiss buttons
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TkFrame.new(base_frame){|f|
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TkButton.new(f, :text=>'Dismiss', :width=>15, :command=>proc{
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$textpeer_demo.destroy
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$textpeer_demo = nil
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}).pack(:side=>:left, :expand=>true)
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TkButton.new(f, :text=>'See Code', :width=>15, :command=>proc{
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showCode 'textpeer'
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}).pack(:side=>:left, :expand=>true)
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TkGrid.configure(f, '-', '-', :sticky=>'ew', :row=>5000)
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}
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TkGrid.columnconfigure(base_frame, 0, :weight=>1)
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