overlay: add initial version of gtkoverlay

2 files changed, 182 insertions, 0 deletions

diff --git a/demos/gtk-demo/Makefile.am b/demos/gtk-demo/Makefile.am
index 46b805a0bf..e4c45538df 100644
--- a/demos/gtk-demo/Makefile.am
+++ b/demos/gtk-demo/Makefile.am
@@ -30,6 +30,7 @@ demos =						\
 	menus.c					\
 	offscreen_window.c			\
 	offscreen_window2.c			\
+	overlay.c				\
 	panes.c					\
 	pickers.c				\
 	pixbufs.c				\
diff --git a/demos/gtk-demo/overlay.c b/demos/gtk-demo/overlay.c
new file mode 100644
index 0000000000..cbddd93cf6
--- /dev/null
+++ b/demos/gtk-demo/overlay.c
@@ -0,0 +1,181 @@
+/* Overlay
+ *
+ * Stack widgets in static positions over a main widget
+ */
+
+#include <gtk/gtk.h>
+
+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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 20);
+      gtk_widget_set_margin_right (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_left (label, 10);
+      gtk_widget_set_margin_right (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;
+}