Re: Motion picture with gdkpixbuf

["Samuel Cormier-Iijima" <sciyoshi gmail com>]

On 10/8/06, Kim Jongha <kim jongha gmail com> wrote:
> Greeting,
> I want to move a picture with gdkpixbuf when I press some key.
>
> It's hard to explain , but when I press some key, I want some image to
> move from position 1 to position 2, just like a motion picture .
>
> -----           ------
> | 2 |           |  1 |
> -----           -------
>
> Anyway I moved the image to position 2, but It's not a motion picture.
> As time goes by, The image was just moved from 1 to 2
>
> core part of my code below:
>
> da = gtk_drawing_area_new();
> while(i<50)
> {
>   gdk_pixbuf_copy_area(background, 0,0,back_width, back_height, frame, 0,0);
>   /*of course r1.x value is decrease by 1 */
>   if(gdk_rectangle_intersect(&r1, &r2, &dest);
>   {
>      gdk_pixbuf_composite(....)
>   }
>
>   gtk_widget_queue_draw(da);
>
>    g_usleep(50);
> }
>
> Does somebody help me?

I'm assuming this is in a key-pressed callback - in that case, you
would have to use gdk_threads_enter ()and gdk_threads_leave() (I
think...). However, a much cleaner solution (instead of the while
loop) would be to add a timeout function that moves the image...

Samuel
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