/* Overlay * * Stack widgets in static positions over a main widget */ #include GtkWidget * do_overlay (GtkWidget *do_widget) { static GtkWidget *window = NULL; if (!window) { GtkWidget *view; GtkWidget *sw; GtkWidget *overlay; GtkWidget *entry; GtkWidget *label; window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_screen (GTK_WINDOW (window), gtk_widget_get_screen (do_widget)); gtk_window_set_default_size (GTK_WINDOW (window), 450, 450); g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window); gtk_window_set_title (GTK_WINDOW (window), "Overlay"); gtk_container_set_border_width (GTK_CONTAINER (window), 0); view = gtk_text_view_new (); sw = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_container_add (GTK_CONTAINER (sw), view); overlay = gtk_overlay_new (); gtk_container_add (GTK_CONTAINER (overlay), sw); gtk_container_add (GTK_CONTAINER (window), overlay); entry = gtk_entry_new (); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); gtk_widget_set_halign (entry, GTK_ALIGN_END); gtk_widget_set_valign (entry, GTK_ALIGN_END); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_END); gtk_widget_set_valign (label, GTK_ALIGN_END); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_START); gtk_widget_set_valign (entry, GTK_ALIGN_END); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_START); gtk_widget_set_valign (label, GTK_ALIGN_END); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_END); gtk_widget_set_valign (entry, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_END); gtk_widget_set_valign (label, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_START); gtk_widget_set_valign (entry, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_START); gtk_widget_set_valign (label, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_END); gtk_widget_set_valign (entry, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_END); gtk_widget_set_valign (label, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_START); gtk_widget_set_valign (entry, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_START); gtk_widget_set_valign (label, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_CENTER); gtk_widget_set_valign (entry, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_CENTER); gtk_widget_set_valign (label, GTK_ALIGN_START); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 20); gtk_widget_set_margin_end (label, 20); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_CENTER); gtk_widget_set_valign (entry, GTK_ALIGN_END); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_CENTER); gtk_widget_set_valign (label, GTK_ALIGN_END); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_set_margin_start (label, 10); gtk_widget_set_margin_end (label, 10); gtk_widget_set_margin_top (label, 5); gtk_widget_set_margin_bottom (label, 5); entry = gtk_entry_new (); gtk_widget_set_halign (entry, GTK_ALIGN_CENTER); gtk_widget_set_valign (entry, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), entry); label = gtk_label_new ("Hello world"); gtk_widget_set_halign (label, GTK_ALIGN_CENTER); gtk_widget_set_valign (label, GTK_ALIGN_CENTER); gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label); gtk_widget_show_all (overlay); } if (!gtk_widget_get_visible (window)) { gtk_widget_show (window); } else { gtk_widget_destroy (window); window = NULL; } return window; }