[pygtk] manipulate image from a gtk.Button

[Augusto Roccasalva]

El día Tue, 27 Nov 2007 05:56:52 -0800 (PST)
awalter1 <alain.walter en thalesgroup.com> escribió:

> 
> the button.set_image (newImage) has no effect !
> 
> Matí­as Alejandro Torres wrote:
> > 
> > awalter1 escribió:
> >> At the creation of the button, I use :
> >> image = gtk.Image()
> >> image.set_from_stock (gtk.STOCK_ADD, gtk.ICON_SIZE_BUTTON)
> >> button = gtk.Button()
> >> button.add (image)	
> >> On the 'changed' callback, I need to change the stock item to
> >> STOCK_REMOVE
> >> and the next time to STOCK_ADD.
> >>   
> > Maybe if you set the image with the set_image method,
> > 
> > image = gtk.Image()
> > image.set_from_stock (gtk.STOCK_ADD, gtk.ICON_SIZE_BUTTON)
> > button = gtk.Button()
> > button.set_image (image)
> > 
> > And when you want to change the image,
> > 
> > button.set_image (newImage)
> > 
> > If you can't use the set_image method, you'll have to keep a reference to
> > the image you want to remove, remove it, add it to the container, and hide
> > and show the button.
> > 

This work for me:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import gtk

win = gtk.Window()
image_add = gtk.Image()
image_rem = gtk.Image()
b = gtk.Button()

image_add.set_from_stock(gtk.STOCK_ADD, gtk.ICON_SIZE_BUTTON)
image_rem.set_from_stock(gtk.STOCK_REMOVE, gtk.ICON_SIZE_BUTTON)

def on_clicked(button):
    state = button.get_data('state')
    if state == '+':
        button.set_image(image_rem)
        button.set_data('state', '-')
    elif state == '-':
        button.set_image(image_add)
        button.set_data('state', '+')
    else:
        raise ValueError("unknown state :(")


# setup initial state
b.set_image(image_add)
b.set_data('state', '+')

# connect signals
b.connect('clicked', on_clicked)
win.connect('delete-event', gtk.main_quit)

win.add(b)
win.show_all()
gtk.main()

Regards
--Augusto