Re: gdk-pixbuf-animation

[Vlad Harchev <hvv hippo ru>]

On Wed, 16 Aug 2000, Ben K wrote:

> this may be the incorrect place to post this, but i'm hoping to get a little 
> help with the gdk_pixbuf_animation functions in gdk-pixbuf.  basically my 
> problem is that i cannot seem to get a good logic structure to implement 
> this in my program.
> 
> my best guess so far is to create a big struct that has the animation, the 
> drawable, and the drawing area in it, al la:
> 
> struct gif {
> GdkPixbufAnimation *foo;
> GdkDrawable *drawable;
> GtkWidget *drawing_area;
> };
> 
> then in main(), i pass the struct to a function called animate(struct gif 
> *ptr), which calls render(struct gif *ptr) on a gtk timeout.  the timeout 
> length varies depending on the length of the frame, accessed with 
> gdk_pixbuf_frame_get_delay_time( gdk_pixbuf_animation_get_frames(ptr)->data 
> )
> 
> this gives me trouble because i end up rendering the pixbuf before the 
> drawing area exists (seg), or i create an expose event on a drawing area 
> with NULL data (seg).

 I think you should connect your timeout function in the signal handler for
"map" event on DrawingArea (i.e. when its GdkWindow is created on X server).
This IMO will solve both of your problems.
 
> please, if anyone could spare a minute do help drag this through my brain, 
> i'd truly appreciate it.
> -bennyk
> 

 Best regards,
  -Vlad