Re: Setting the background color of a GtkFixed

[Olexiy Avramchenko <olexiy ctech cn ua>]

Tapan Satpathy Ansuman-A19108 wrote:

> Hi,
>
> I want to create a Frame in which I can put many child widgets.
>
> For that I create a Frame and put a GtkFixed inside this. I want to add some colours dynamically to the 
> Parent Frame. But gtk_widget_modify_bg(...) doesn't seem to be working on GtkFixed.
>
> Is there any method to do so? Or should I use some other widget instead of GtkFixed ?
>  
Hello, the one possible solution is to use expose-event callback for the 
fixed container, like this:
static gboolean
fixed_expose_event (GtkWidget *widget, GdkEventExpose *event)
{
       gint i,n;
       GdkRectangle *rects;

       gdk_region_get_rectangles(event->region, &rects, &n);
       for (i=0; i<n; i++)
               gdk_draw_rectangle(
                                       widget->window,
                                       
widget->style->bg_gc[GTK_STATE_NORMAL],
                                       TRUE,
                                       rects[i].x,     rects[i].y,
                                       rects[i].width, rects[i].height
               );

       return FALSE;
}

It uses background pixel value for the GTK_STATE_NORMAL, so you can use 
call gtk_widget_modify_bg() function for changing background colour 
(remember that this function wants allocated colour, with real pixel value).
*NOTE* callback _must_ return FALSE or you'll see no container's children.

   Olexiy