import gtk
import hildon

def enable_zoom_cb(window):
	window.window.property_change(gtk.gdk.atom_intern("_HILDON_ZOOM_KEY_ATOM"), gtk.gdk.atom_intern("INTEGER"), 32, gtk.gdk.PROP_MODE_REPLACE, [1]);

def enable_zoom_keys(window):
	if window.flags() & gtk.REALIZED:
        	enable_zoom_cb(window)
	else:
		window.connect("realize", enable_zoom_cb)


def key_press_handler(widget, event):
	if event.keyval in [hildon.KEY_DECREASE, hildon.KEY_INCREASE]:
		hildon.hildon_banner_show_information(widget, "None", "A zoom key hit")
		return True
	return False

window = hildon.Window()
enable_zoom_keys(window)
window.connect("key-press-event", key_press_handler)
window.show_all()
gtk.main()