idle function

["samuel.berthelot" <samuel berthelot voila fr>]

Hi,
I have 3 glarea in my gtk window. They all display the same thing under 
different view angle. They must be updated when required so I wrote this set 
of idle functions:

gtk_idle_add_priority (GTK_PRIORITY_REDRAW,glarea_draw, glarea1);
gtk_idle_add_priority (GTK_PRIORITY_REDRAW,glarea_draw, glarea2);
gtk_idle_add_priority (GTK_PRIORITY_REDRAW,glarea_draw, glarea3);

where glarea_draw is as follow :

int glarea_draw (GtkWidget* widget, GdkEventExpose* event)
{
        if (event->count > 0)
        {
                return(TRUE);
        }       

        if (gtk_gl_area_make_current(GTK_GL_AREA(widget)))
        {
                glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                glLoadIdentity();
                switch (GPOINTER_TO_INT(gtk_object_get_data(widget, "id"))){
                        case 1: gluLookAt(0.0, 0.0, distance1, 
                                                                        0.0, 0.0, 0.0,  
                                                                        0.0, 1.0, 0.0); 
                                          glRotatef(xrot1,1.0,0.0,0.0);
                                  glRotatef(yrot1,0.0,1.0,0.0);
                                          break;
                
                        case 2: gluLookAt(0.0, 0.0, distance2, 
                                                                        0.0, 0.0, 0.0,  
                                                                        0.0, 1.0, 0.0); 
                                          glRotatef(xrot2,1.0,0.0,0.0);
                                  glRotatef(yrot2,0.0,1.0,0.0);
                                          break;
                                          
                        case 3: gluLookAt(0.0, 0.0, distance3, 
                                                                        0.0, 0.0, 0.0,  
                                                                        0.0, 1.0, 0.0); 
                                          glRotatef(xrot3,1.0,0.0,0.0);
                                  glRotatef(yrot3,0.0,1.0,0.0);
                                          break;
                        
                        default: ;;
                }
     etc etc

}

Now my problem is that when the areas need to be updated, there is a laps of 
time. I mean they are not updated right at the same time.
Does anybody know why ?
(I know glarea are not part of gtk, but it's the same as any other widget 
anyway)
cheers,
Sam

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