Re: Where to place init code (in which event handler) needing custom widget's window mapped?

[David Sillou <silloudavid yahoo fr>]

Marco wrote:

> On Wed, 23 Mar 2005 23:40:05 +0100, David Sillou 
> <silloudavid yahoo fr>  wrote:
>
> > Hello,
> > I need to execute various initialization code in a derived widget; 
> > That  code  need to be executed only one time but it also need that 
> > widget's  window is mapped since i need to perform few operation 
> > (xine related  stuff) on that window (GDK object).
> >
> > Could someone please tell me where is the best place to put that code?
>
>
> try on_realize()
> in that function call on_realize() on the parent first and then do 
> your  initialization.
>
> > Is there any available documentation that could help me to have a 
> > better  idea of when and why events are fired in a typical widget's 
> > life (for  example: relation between widget's state and events ) ?  
> > It's rather  difficult to find out in which circumstances events are 
> > fired for a  beginner; Studying xlib (and gtk) helped me  but it 
> > remains obscure to  me.
>
>
> http://developer.gnome.org/doc/GGAD/z57.html
>
> --
> Marco
Thanks for the link.
Concerning on_realize, it's the way i tried to achieve the work 
(including calling base class method before any other thing) but the  
window I create for xine to render to:

m_window = Gdk::Window::create(get_window(), &attributes,GDK_WA_X|GDK_WA_Y);

isn't mapped yet. I verified it by calling:

std::cout <<m_window->is_viewable ()<<std::endl;

and i get a "bad drawable or bad window error" if I execute xine init 
functions (passing the created window as arg).


DAve