Hi Everyone,
I'm having some problems getting visibility-notify events from a drawing
area.
The problem is that the "visibility-notify-event" is not emitted by the
drawing area when the notebook page is switched such that the drawing
area becomes obscured by a different page. But it is emitted when it
becomes visible again.
Is this a feature or a bug. It works as expected when the "other" window
is a different application, but does not work when obscured by another
notebook page.
The Code snippet below illustrates this:
#!/usr/bin/env python
import gtk, gobject
def on_visibility_notify(widget,event):
print info, event.state
return True
def main():
win = gtk.Window()
win.set_size_request(200,200)
win.connect("destroy", lambda x: gtk.main_quit())
book = gtk.Notebook()
da = gtk.DrawingArea()
da.add_events(gtk.gdk.VISIBILITY_NOTIFY_MASK)
im = gtk.Image()
book.append_page( da, tab_label=gtk.Label('Drawing Area') )
book.append_page( im, tab_label=gtk.Label('Image') )
da.connect('visibility-notify-event', on_visibility_notify)
win.add(book)
win.show_all()
gtk.main()
if __name__ == '__main__':
main()
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