From: 7stud -- <bbxx789_05ss@...>
Date: 2008-04-14T15:01:59+09:00
Subject: Re: ruby/tk and loop delay

7stud -- wrote:
> Ed Redman wrote:
>> I am writing a card game in ruby/tk.
>> 
>> I have a Tk_button(shuffle) that shuffles the cards and places them on a
>> canvas.The shuffle works fine but I would like to have a slight delay
>> between between each card being displayed on the canvas. Below is the
>> shuffle buttons command. I would like to delay the loop each time so
>> their is a slight delay. I have tried putting Tk.after(time)
>> { part around the loop} but it just delays the shuffle and is not

Try using the calling the update() method on the widget.  I can't get 
the after() method to work at all: even if I specify 40,000,000 
milliseconds as the delay, all the lines get drawn instantly.

require 'tk'

def do_press(e)
  widget = e.widget
  x = e.x
  y = e.y

  threads = []

  10.times do |i|
    x += 10
    TkcLine.new(widget, x, y, x+100, y+100)

    Tk.after(40000000, proc{widget.update} )
  end

end


root = TkRoot.new {title 'Canvas Test'}
canvas = TkCanvas.new(root)
canvas.pack

canvas.bind('ButtonRelease-1', lambda {|e| do_press(e)})
Tk.mainloop
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