From: 7stud -- <bbxx789_05ss@...>
Date: 2008-04-14T14:00:09+09:00
Subject: Re: ruby/tk and loop delay

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
> visible. Not each card being displayed.  I need a little direction
> on implementing such a loop
> 
> thanks
> 
> 
> 
> shuffle.command do
>    52.times do
>               |i|
> 
>               nr = rand(56)
>               nm = rand(56)
>               io = newhash[nr]
>               im = newhash[nm]
>  #            Tk.after(100) {
>               place[nr].image  io
>               newhash[nm] = io
>               place[nr].image im
>               newhash[nr] = im
>  #             }
>             end
> 
> end

Are you not supposed to use sleep() for some reason?  This works for me:

require 'tk'

def do_press(e)
  widget = e.widget

  x = e.x
  y = e.y

  10.times do
    x += 10
    TkcLine.new(widget, x, y, x+100, y+100)
    widget.update
    sleep(2)
  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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