From: Frank Murphy <fjm_maillists@...>
Date: 2002-05-08T05:45:58+09:00
Subject: Ruby/GTK with no window movement updates


  I'm just starting to play around with Ruby, especially with it's 
GTK bindings. But I'm having a problem being able to move a window 
from within the ruby script.

  What I want to do is when the "move World" button is pressed, to 
move the window to 0,0, then sleep for a small while, then move to 
1,1 up to 50,50. What happens is that I get the "Moving World" output 
all at once, but the window doesn't move. Then the app waits (I 
assume 50 * 0.1 seconds), then I can see the window slide around 
where it should, too fast.

  If I comment out the window movement piece, the stdout seems to 
sleep the right amount.

  I initially put the sleep stuff into a Thread, but I got this same 
problem.

Any ideas?

Frank


---8<---
#!/usr/bin/ruby

require 'gtk'

window = Gtk::Window.new()

button1 = Gtk::Button.new('Move World')
button2 = Gtk::Button.new('Quit')

vbox = Gtk::VBox.new(false, 0)

vbox.pack_start button1, true, true, 0
vbox.pack_start button2, true, true, 0

button1.signal_connect('clicked') {
    0.upto(50) do |i|
        window.set_uposition(i, i)
        print "Moving World\n"
        sleep(0.1)
    end
}

button2.signal_connect('clicked') {
    exit
}

window.set_title 'hello'

window.add vbox
button1.show
button2.show
vbox.show
window.show
Gtk.main