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copied!<pre><code>/* (c) 2010 Virgoptrex. Feel Free to use. Leave credits intact */ #include gtk/gtk.h gint t=0; gboolean expose_event_callback (GtkWidget *widget, GdkEventExpose *event, gpointer data) { //g_object_ref_sink (widget->window); // gdk_drawable_ref (widget->window); gdk_draw_arc (widget->window, widget->style->fg_gc[GTK_WIDGET_STATE (widget)], TRUE, 0, 0, widget->allocation.width, widget->allocation.height, 0, 64 * 18*t); //gdk_drawable_unref (widget->window); return TRUE; } static gboolean time_handler(GtkWidget *widget) { gtk_widget_queue_draw(GTK_WIDGET(widget)); if (t<20) { t++; } else if (t >=20) { t=0; } printf("hello %d\n",t); return TRUE; } int main( int argc, char *argv[] ) { GtkWidget *window; GtkWidget *aspect_frame; GtkWidget *drawing_area; gtk_init (&argc, &argv); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_title (GTK_WINDOW (window), "Aspect Frame"); g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL); gtk_container_set_border_width (GTK_CONTAINER (window), 10); /* Create an aspect_frame and add it to our toplevel window */ aspect_frame = gtk_aspect_frame_new ("2x1", /* label */ 0.5, /* center x */ 0.5, /* center y */ 2, /* xsize/ysize = 2 */ FALSE /* ignore child's aspect */); gtk_container_add (GTK_CONTAINER (window), aspect_frame); gtk_widget_show (aspect_frame); /* Now add a child widget to the aspect frame */ drawing_area = gtk_drawing_area_new (); /* Ask for a 200x200 window, but the AspectFrame will give us a 200x100 * window since we are forcing a 2x1 aspect ratio */ gtk_widget_set_size_request (drawing_area, 200, 200); gtk_container_add (GTK_CONTAINER (aspect_frame), drawing_area); gtk_widget_show (drawing_area); g_signal_connect (G_OBJECT (drawing_area), "expose_event", G_CALLBACK (expose_event_callback), NULL); g_timeout_add(100, (GSourceFunc) time_handler, (gpointer)drawing_area); gtk_widget_show (window); gtk_main (); return 0; } </code></pre>

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