Re: idle function parameters

[Melvin Hadasht <melvin hadasht free fr>]

> Hi, 
> I have the following function:
>
> int glarea_draw (GtkWidget* widget, GdkEventExpose* event, gpointer id)
> {
>       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(id)){
>                        do stuff
>             }
>        }
>  }
>
> And I use that:
>
> gtk_idle_add_priority (GTK_PRIORITY_REDRAW,glarea_draw, GINT_TO_POINTER(1));

Did you check the declaration of gtk_idle_add_priority()?
Here it is according to gtk docs:

guint gtk_idle_add_priority( gint priority, GtkFunction function, gpointer data);

where GtkFunction is declared as:

gint (*GtkFunction) (gpointer data).

You glarea_draw is not a GtkFunction, it expects three argumenrs whereas
gtk passes it only the gpointer data as its first argument.

If you need to pass more than one parameter as user_data, use
structures.  You can search the archives about how to pass more than
one parameter. It is a FAQ.