pulp2

static gboolean
glow_timer (gpointer data)
{
  //GdkPixbuf *glowing_screenshot;
  GTimeVal tv;
  gdouble glow_factor, now;

  Applet *applet = (Applet *) data;

  cairo_t *cr; 
  cr = gdk_cairo_create (applet->gdk_window);   


  g_get_current_time (&tv);
  now = (tv.tv_sec * (1.0 * G_USEC_PER_SEC) +
        tv.tv_usec) / G_USEC_PER_SEC;

  if (glow_start_time <= G_MINDOUBLE)
    glow_start_time = now;

	printf ("now: %f\n", now);

   
  glow_factor = fade_opacity * (0.5 - 0.5 * cos ((now - glow_start_time) * M_PI * 2.0 / loop_time));


	printf ("glow_factor: %f\n", glow_factor);
  
  //gdk_window_clear (applet->gdk_window);   or...
	GdkRegion *region;
	region = gdk_drawable_get_clip_region (applet->gdk_window);
	gdk_window_invalidate_region (applet->gdk_window, region, TRUE);
	gdk_window_process_updates (applet->gdk_window, TRUE);
	gdk_region_destroy (region);

  cairo_set_source_rgba (cr, 0.3, 0.3, 1, glow_factor);
  cairo_rectangle (cr, 0, 0, 40, 40);
  cairo_fill (cr);	                    
 

  return TRUE;
}