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

[David Sillou <silloudavid yahoo fr>]

David Sillou wrote:

> 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
>
>
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Hi,
After verification, it seems that I get the same error even if my custom 
widget's window is mapped before passing it to xine' functions...


-->The error was 'BadDrawable (invalid Pixmap or Window parameter)'.
 (Details: serial 12 error_code 9 request_code 55 minor_code 0)

When i call the exactly same init code in a button_cliked event handler 
, all works fine.

I don't understand where the problem is now...

DAve.