31 lines
654 B
Ruby
31 lines
654 B
Ruby
#!/usr/bin/env ruby
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require 'tk'
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TkLabel.new(:text=>"Please click the bottom frame").pack
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f = TkFrame.new(:width=>400, :height=>100, :background=>'yellow',
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:relief=>'ridge', :borderwidth=>5).pack
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# TkPack.propagate(f, false) # <== important!!
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f.pack_propagate(false) # <== important!!
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list = (1..3).collect{|n|
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TkButton.new(f, :text=>"button#{'-X'*n}"){
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command proc{
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puts "button#{'-X'*n}"
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self.unpack
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}
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}
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}
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list.unshift(nil)
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f.bind('1', proc{
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w = list.shift
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w.unpack if w
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list.push(w)
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list[0].pack(:expand=>true, :anchor=>:center) if list[0]
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})
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Tk.mainloop
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