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[gnome-control-center] shell: Add animated notebook

commit 74aa98b7c81b5a59577f2180352efdbce7235bcd
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Apr 30 19:24:14 2012 +0100

    shell: Add animated notebook
    
    Powered by gtk-clutter.

 configure.ac          |    2 +-
 shell/Makefile.am     |    7 +
 shell/TODO            |    4 +
 shell/cc-notebook.c   |  466 +++++++++++++++++++++++++++++++++++++++++++++++++
 shell/cc-notebook.h   |   69 ++++++++
 shell/test-notebook.c |   92 ++++++++++
 6 files changed, 639 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index beab7cf..a4528d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,7 +91,7 @@ COMMON_MODULES="gtk+-3.0 >= $GTK_REQUIRED_VERSION
 PKG_CHECK_MODULES(LIBGNOME_CONTROL_CENTER, $COMMON_MODULES)
 PKG_CHECK_MODULES(LIBLANGUAGE, $COMMON_MODULES gnome-desktop-3.0 fontconfig)
 PKG_CHECK_MODULES(LIBSHORTCUTS, $COMMON_MODULES x11)
-PKG_CHECK_MODULES(SHELL, $COMMON_MODULES libgnome-menu-3.0 gio-unix-2.0 x11)
+PKG_CHECK_MODULES(SHELL, $COMMON_MODULES libgnome-menu-3.0 gio-unix-2.0 x11 clutter-gtk-1.0)
 PKG_CHECK_MODULES(BACKGROUND_PANEL, $COMMON_MODULES libxml-2.0 gnome-desktop-3.0
                   gdk-pixbuf-2.0 >= $GDKPIXBUF_REQUIRED_VERSION)
 PKG_CHECK_MODULES(DATETIME_PANEL, $COMMON_MODULES
diff --git a/shell/Makefile.am b/shell/Makefile.am
index 58117f8..d59ba3a 100644
--- a/shell/Makefile.am
+++ b/shell/Makefile.am
@@ -19,6 +19,8 @@ gnome_control_center_SOURCES =			\
 	cc-shell-log.h				\
 	gnome-control-center.c			\
 	gnome-control-center.h			\
+	cc-notebook.c				\
+	cc-notebook.h				\
 	shell-search-renderer.c			\
 	shell-search-renderer.h			\
 	cc-shell-category-view.c		\
@@ -67,6 +69,11 @@ directory_in_files = gnomecc.directory.in
 directory_DATA = $(directory_in_files:.directory.in=.directory)
 @INTLTOOL_DIRECTORY_RULE@
 
+noinst_PROGRAMS = test-notebook
+test_notebook_SOURCES = test-notebook.c cc-notebook.c cc-notebook.h
+test_notebook_CFLAGS = $(SHELL_CFLAGS)
+test_notebook_LDADD = $(SHELL_LIBS)
+
 EXTRA_DIST =					\
 	$(ui_DATA)				\
 	gnome-control-center.desktop.in.in	\
diff --git a/shell/TODO b/shell/TODO
new file mode 100644
index 0000000..10a6ddb
--- /dev/null
+++ b/shell/TODO
@@ -0,0 +1,4 @@
+- Make transitions between pages always be contiguous
+  the children list order affects the paint order - so you can use set_child_above_sibling/set_child_below_sibling
+- Add a scroll direction to the animation
+  (back to parent to the left, to a child to the right)
diff --git a/shell/cc-notebook.c b/shell/cc-notebook.c
new file mode 100644
index 0000000..da6e9cf
--- /dev/null
+++ b/shell/cc-notebook.c
@@ -0,0 +1,466 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright  2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Written by:
+ *      Bastien Nocera <hadess hadess net>
+ *      Emmanuele Bassi <ebassi linux intel com>
+ */
+
+#include "config.h"
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include "cc-notebook.h"
+
+#define GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CC_TYPE_NOTEBOOK, CcNotebookPrivate))
+
+/*
+ * Structure:
+ *
+ *   Notebook
+ *   +---- GtkClutterEmbed
+ *         +---- ClutterStage
+ *               +---- ClutterScrollActor:scroll
+ *                     +---- ClutterActor:bin
+ *                           +---- ClutterActor:frame<ClutterBinLayout>
+ *                                 +---- GtkClutterActor:embed<GtkWidget>
+ *
+ * the frame element is needed to make the GtkClutterActor contents fill the allocation
+ */
+
+struct _CcNotebookPrivate
+{
+        GtkWidget *embed;
+
+        ClutterActor *stage;
+        ClutterActor *scroll;
+        ClutterActor *bin;
+
+        int last_width;
+
+        GtkWidget *selected_page;
+        GList *pages; /* GList of GtkWidgets */
+};
+
+enum
+{
+        PROP_0,
+        PROP_CURRENT_PAGE,
+        LAST_PROP
+};
+
+static GParamSpec *obj_props[LAST_PROP] = { NULL, };
+
+G_DEFINE_TYPE (CcNotebook, cc_notebook, GTK_TYPE_BOX)
+
+static void
+cc_notebook_get_property (GObject    *gobject,
+                          guint       prop_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
+{
+        CcNotebookPrivate *priv = CC_NOTEBOOK (gobject)->priv;
+
+        switch (prop_id) {
+        case PROP_CURRENT_PAGE:
+                g_value_set_pointer (value, priv->selected_page);
+                break;
+
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
+        }
+}
+
+static void
+cc_notebook_set_property (GObject      *gobject,
+			  guint         prop_id,
+			  const GValue *value,
+			  GParamSpec   *pspec)
+{
+        CcNotebook *self = CC_NOTEBOOK (gobject);
+
+        switch (prop_id) {
+        case PROP_CURRENT_PAGE:
+                cc_notebook_select_page (self, g_value_get_pointer (value));
+                break;
+
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
+        }
+}
+
+static GtkSizeRequestMode
+cc_notebook_get_request_mode (GtkWidget *widget)
+{
+	CcNotebook *notebook;
+	GtkWidget *target;
+
+	notebook = CC_NOTEBOOK (widget);
+
+	target = notebook->priv->selected_page ? notebook->priv->selected_page : notebook->priv->embed;
+
+	return gtk_widget_get_request_mode (target);
+}
+
+static void
+cc_notebook_get_preferred_height (GtkWidget       *widget,
+				  gint            *minimum_height,
+				  gint            *natural_height)
+{
+	CcNotebook *notebook;
+	GList *l;
+
+	notebook = CC_NOTEBOOK (widget);
+
+	if (notebook->priv->selected_page == NULL) {
+		gtk_widget_get_preferred_height (notebook->priv->selected_page, minimum_height, natural_height);
+		return;
+	}
+
+	*minimum_height = 0;
+	*natural_height = 0;
+	for (l = notebook->priv->pages; l != NULL; l = l->next) {
+		GtkWidget *page = l->data;
+		int page_min, page_nat;
+
+		gtk_widget_get_preferred_height (page, &page_min, &page_nat);
+		*minimum_height = MAX(page_min, *minimum_height);
+		*natural_height = MAX(page_nat, *natural_height);
+	}
+}
+
+static void
+cc_notebook_get_preferred_width_for_height (GtkWidget       *widget,
+					    gint             height,
+					    gint            *minimum_width,
+					    gint            *natural_width)
+{
+	CcNotebook *notebook;
+	GList *l;
+
+	notebook = CC_NOTEBOOK (widget);
+
+	if (notebook->priv->selected_page == NULL) {
+		gtk_widget_get_preferred_width_for_height (notebook->priv->selected_page, height, minimum_width, natural_width);
+		return;
+	}
+
+	*minimum_width = 0;
+	*natural_width = 0;
+	for (l = notebook->priv->pages; l != NULL; l = l->next) {
+		GtkWidget *page = l->data;
+		int page_min, page_nat;
+
+		gtk_widget_get_preferred_width_for_height (page, height, &page_min, &page_nat);
+		*minimum_width = MAX(page_min, *minimum_width);
+		*natural_width = MAX(page_nat, *natural_width);
+	}
+}
+
+static void
+cc_notebook_get_preferred_width (GtkWidget       *widget,
+				 gint            *minimum_width,
+				 gint            *natural_width)
+{
+	CcNotebook *notebook;
+	GList *l;
+
+	notebook = CC_NOTEBOOK (widget);
+
+	if (notebook->priv->selected_page == NULL) {
+		gtk_widget_get_preferred_height (notebook->priv->selected_page, minimum_width, natural_width);
+		return;
+	}
+
+	*minimum_width = 0;
+	*natural_width = 0;
+	for (l = notebook->priv->pages; l != NULL; l = l->next) {
+		GtkWidget *page = l->data;
+		int page_min, page_nat;
+
+		gtk_widget_get_preferred_width (page, &page_min, &page_nat);
+		*minimum_width = MAX(page_min, *minimum_width);
+		*natural_width = MAX(page_nat, *natural_width);
+	}
+}
+
+static void
+cc_notebook_get_preferred_height_for_width (GtkWidget       *widget,
+					    gint             width,
+					    gint            *minimum_height,
+					    gint            *natural_height)
+{
+	CcNotebook *notebook;
+	GList *l;
+
+	notebook = CC_NOTEBOOK (widget);
+
+	if (notebook->priv->selected_page == NULL) {
+		gtk_widget_get_preferred_height_for_width (notebook->priv->selected_page, width, minimum_height, natural_height);
+		return;
+	}
+
+	*minimum_height = 0;
+	*natural_height = 0;
+	for (l = notebook->priv->pages; l != NULL; l = l->next) {
+		GtkWidget *page = l->data;
+		int page_min, page_nat;
+
+		gtk_widget_get_preferred_height_for_width (page, width, &page_min, &page_nat);
+		*minimum_height = MAX(page_min, *minimum_height);
+		*natural_height = MAX(page_nat, *natural_height);
+	}
+}
+
+static void
+cc_notebook_class_init (CcNotebookClass *klass)
+{
+        GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+        g_type_class_add_private (klass, sizeof (CcNotebookPrivate));
+
+        obj_props[PROP_CURRENT_PAGE] =
+                g_param_spec_pointer (g_intern_static_string ("current-page"),
+				      "Current Page",
+				      "The currently selected page widget",
+				      G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+
+        gobject_class->get_property = cc_notebook_get_property;
+        gobject_class->set_property = cc_notebook_set_property;
+        g_object_class_install_properties (gobject_class, LAST_PROP, obj_props);
+
+	widget_class->get_request_mode = cc_notebook_get_request_mode;
+	widget_class->get_preferred_height = cc_notebook_get_preferred_height;
+	widget_class->get_preferred_width_for_height = cc_notebook_get_preferred_width_for_height;
+	widget_class->get_preferred_width = cc_notebook_get_preferred_width;
+	widget_class->get_preferred_height_for_width = cc_notebook_get_preferred_height_for_width;
+}
+
+static void
+on_embed_size_allocate (GtkWidget     *embed,
+                        GtkAllocation *allocation,
+                        CcNotebook  *self)
+{
+        ClutterActorIter iter;
+        ClutterActor *child;
+        ClutterActor *frame;
+        float page_w, page_h;
+        float offset = 0.f;
+        ClutterPoint pos;
+
+        if (self->priv->selected_page == NULL)
+		return;
+
+        page_w = allocation->width;
+        page_h = allocation->height;
+
+        clutter_actor_iter_init (&iter, self->priv->bin);
+        while (clutter_actor_iter_next (&iter, &child)) {
+                clutter_actor_set_x (child, offset);
+                clutter_actor_set_size (child, page_w, page_h);
+
+                offset += page_w;
+        }
+
+	/* This stops the non-animated scrolling from happening
+	 * if we're still scrolling there */
+	if (self->priv->last_width == allocation->width)
+		return;
+
+        self->priv->last_width = allocation->width;
+
+	frame = g_object_get_data (G_OBJECT (self->priv->selected_page),
+				   "cc-notebook-frame");
+
+        pos.y = 0;
+        pos.x = clutter_actor_get_x (frame);
+        clutter_scroll_actor_scroll_to_point (CLUTTER_SCROLL_ACTOR (self->priv->scroll), &pos);
+}
+
+static void
+cc_notebook_init (CcNotebook *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, CC_TYPE_NOTEBOOK, CcNotebookPrivate);
+
+        self->priv->embed = gtk_clutter_embed_new ();
+        gtk_widget_push_composite_child ();
+        gtk_container_add (GTK_CONTAINER (self), self->priv->embed);
+        gtk_widget_pop_composite_child ();
+        g_signal_connect (self->priv->embed, "size-allocate", G_CALLBACK (on_embed_size_allocate), self);
+        gtk_widget_show (self->priv->embed);
+
+        self->priv->stage = gtk_clutter_embed_get_stage (GTK_CLUTTER_EMBED (self->priv->embed));
+
+        self->priv->scroll = clutter_scroll_actor_new ();
+        clutter_scroll_actor_set_scroll_mode (CLUTTER_SCROLL_ACTOR (self->priv->scroll),
+                                                CLUTTER_SCROLL_HORIZONTALLY);
+        clutter_actor_add_constraint (self->priv->scroll, clutter_bind_constraint_new (self->priv->stage, CLUTTER_BIND_SIZE, 0.f));
+        clutter_actor_add_child (self->priv->stage, self->priv->scroll);
+
+        self->priv->bin = clutter_actor_new ();
+        clutter_actor_add_child (self->priv->scroll, self->priv->bin);
+
+        self->priv->selected_page = NULL;
+        gtk_widget_set_name (GTK_WIDGET (self), "GtkBox");
+}
+
+GtkWidget *
+cc_notebook_new (void)
+{
+        return g_object_new (CC_TYPE_NOTEBOOK, NULL);
+}
+
+static void
+_cc_notebook_select_page (CcNotebook *self,
+			  GtkWidget  *widget,
+			  int         index)
+{
+        ClutterPoint pos;
+
+        g_return_if_fail (CC_IS_NOTEBOOK (self));
+        g_return_if_fail (GTK_IS_WIDGET (widget));
+
+        pos.y = 0;
+        pos.x = self->priv->last_width * index;
+
+        clutter_actor_save_easing_state (self->priv->scroll);
+        clutter_actor_set_easing_duration (self->priv->scroll, 500);
+
+        clutter_scroll_actor_scroll_to_point (CLUTTER_SCROLL_ACTOR (self->priv->scroll), &pos);
+
+	clutter_actor_restore_easing_state (self->priv->scroll);
+
+        /* Remember the last selected page */
+        self->priv->selected_page = widget;
+
+        g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_CURRENT_PAGE]);
+}
+
+void
+cc_notebook_select_page (CcNotebook *self,
+                         GtkWidget  *widget)
+{
+	int i, n_children;
+	GList *children, *l;
+	ClutterActor *frame;
+	gboolean found;
+
+        if (widget == self->priv->selected_page)
+		return;
+
+	found = FALSE;
+	frame = g_object_get_data (G_OBJECT (widget), "cc-notebook-frame");
+
+        n_children = clutter_actor_get_n_children (self->priv->bin);
+        children = clutter_actor_get_children (self->priv->bin);
+        for (i = 0, l = children; i < n_children; i++, l = l->next) {
+		if (frame == l->data) {
+			_cc_notebook_select_page (self, widget, i);
+			found = TRUE;
+			break;
+		}
+	}
+	g_list_free (children);
+	if (found == FALSE)
+		g_warning ("Could not find widget '%p' in CcNotebook '%p'", widget, self);
+}
+
+void
+cc_notebook_add_page (CcNotebook *self,
+                      GtkWidget  *widget)
+{
+        ClutterActor *frame;
+        ClutterActor *embed;
+        int res;
+
+        g_return_if_fail (CC_IS_NOTEBOOK (self));
+        g_return_if_fail (GTK_IS_WIDGET (widget));
+
+        frame = clutter_actor_new ();
+        clutter_actor_set_layout_manager (frame, clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_FILL,
+                                                                         CLUTTER_BIN_ALIGNMENT_FILL));
+
+        embed = gtk_clutter_actor_new_with_contents (widget);
+        g_object_set_data (G_OBJECT (widget), "cc-notebook-frame", frame);
+        clutter_actor_add_child (frame, embed);
+        gtk_widget_show (widget);
+
+        res = clutter_actor_get_n_children (self->priv->bin);
+        clutter_actor_insert_child_at_index (self->priv->bin, frame, res);
+
+        self->priv->pages = g_list_prepend (self->priv->pages, widget);
+
+        if (self->priv->selected_page == NULL)
+		_cc_notebook_select_page (self, widget, res);
+
+        gtk_widget_queue_resize (GTK_WIDGET (self));
+}
+
+void
+cc_notebook_remove_page (CcNotebook *self,
+                         GtkWidget  *widget)
+{
+        ClutterActorIter iter;
+        ClutterActor *child, *frame, *selected_frame;
+        int index;
+        gboolean found_current;
+        ClutterPoint pos;
+
+        g_return_if_fail (CC_IS_NOTEBOOK (self));
+        g_return_if_fail (GTK_IS_WIDGET (widget));
+        g_return_if_fail (widget != self->priv->selected_page);
+
+        found_current = FALSE;
+        frame = g_object_get_data (G_OBJECT (widget), "cc-notebook-frame");
+        selected_frame = g_object_get_data (G_OBJECT (self->priv->selected_page), "cc-notebook-frame");
+
+	index = 0;
+        clutter_actor_iter_init (&iter, self->priv->bin);
+        while (clutter_actor_iter_next (&iter, &child)) {
+                if (frame == child) {
+			clutter_actor_iter_remove (&iter);
+                        break;
+                } else if (selected_frame == child) {
+			found_current = TRUE;
+		}
+
+		index++;
+        }
+
+        self->priv->pages = g_list_remove (self->priv->pages, widget);
+        gtk_widget_queue_resize (GTK_WIDGET (self));
+
+	/* The current page is before the one we removed, so no
+	 * need to shift the scroll view */
+        if (found_current)
+		return;
+
+        pos.y = 0;
+        pos.x = self->priv->last_width * index;
+        clutter_scroll_actor_scroll_to_point (CLUTTER_SCROLL_ACTOR (self->priv->scroll), &pos);
+}
+
+GtkWidget *
+cc_notebook_get_selected_page (CcNotebook *self)
+{
+        g_return_val_if_fail (CC_IS_NOTEBOOK (self), NULL);
+
+        return self->priv->selected_page;
+}
diff --git a/shell/cc-notebook.h b/shell/cc-notebook.h
new file mode 100644
index 0000000..508d54a
--- /dev/null
+++ b/shell/cc-notebook.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright  2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Written by:
+ *      Bastien Nocera <hadess hadess net>
+ */
+
+#ifndef _CC_NOTEBOOK_H_
+#define _CC_NOTEBOOK_H_
+
+#include <gtk/gtk.h>
+#include <clutter-gtk/clutter-gtk.h>
+
+G_BEGIN_DECLS
+
+#define CC_TYPE_NOTEBOOK                (cc_notebook_get_type ())
+#define CC_NOTEBOOK(obj)                (G_TYPE_CHECK_INSTANCE_CAST ((obj), CC_TYPE_NOTEBOOK, CcNotebook))
+#define CC_IS_NOTEBOOK(obj)             (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CC_TYPE_NOTEBOOK))
+#define CC_NOTEBOOK_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST ((klass), CC_TYPE_NOTEBOOK, CcNotebookClass))
+#define CC_IS_NOTEBOOK_CLASS(klass)     (G_TYPE_CHECK_CLASS_TYPE ((klass), CC_TYPE_NOTEBOOK))
+#define CC_NOTEBOOK_GET_CLASS(obj)      (G_TYPE_INSTANCE_GET_CLASS ((obj), CC_TYPE_NOTEBOOK, CcNotebookClass))
+
+typedef struct _CcNotebook            CcNotebook;
+typedef struct _CcNotebookPrivate     CcNotebookPrivate;
+typedef struct _CcNotebookClass       CcNotebookClass;
+
+struct _CcNotebook
+{
+        GtkBox parent_class;
+
+        CcNotebookPrivate *priv;
+};
+
+struct _CcNotebookClass
+{
+        GtkBoxClass parent_class;
+};
+
+GType           cc_notebook_get_type                    (void) G_GNUC_CONST;
+
+GtkWidget *     cc_notebook_new                         (void);
+
+void            cc_notebook_add_page                    (CcNotebook *self,
+                                                         GtkWidget  *widget);
+void            cc_notebook_remove_page                 (CcNotebook *self,
+                                                         GtkWidget  *widget);
+
+void            cc_notebook_select_page                 (CcNotebook *self,
+                                                         GtkWidget  *widget);
+
+GtkWidget *     cc_notebook_get_selected_page           (CcNotebook *self);
+
+G_END_DECLS
+
+#endif /* _CC_NOTEBOOK_H_ */
diff --git a/shell/test-notebook.c b/shell/test-notebook.c
new file mode 100644
index 0000000..a488a8a
--- /dev/null
+++ b/shell/test-notebook.c
@@ -0,0 +1,92 @@
+#include <stdlib.h>
+#include "cc-notebook.h"
+
+#define NUM_PAGES 5
+
+static GHashTable *pages;
+static GtkWidget *notebook;
+
+static void
+goto_page (GtkButton *button,
+	   gpointer   user_data)
+{
+	int target = GPOINTER_TO_INT (user_data);
+	GtkWidget *widget;
+
+	if (target < 1)
+		target = NUM_PAGES;
+	else if (target > NUM_PAGES)
+		target = 1;
+	widget = g_hash_table_lookup (pages, GINT_TO_POINTER (target));
+	cc_notebook_select_page (CC_NOTEBOOK (notebook), widget);
+}
+
+static GtkWidget *
+create_page_contents (int page_num)
+{
+  GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+  char *text = g_strdup_printf ("Page number %d", page_num);
+
+  GtkWidget *hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+
+  GtkWidget *back_button = gtk_button_new_with_label ("â");
+  gtk_widget_set_halign (back_button, GTK_ALIGN_START);
+  gtk_box_pack_start (GTK_BOX (hbox), back_button, FALSE, FALSE, 0);
+  g_signal_connect (G_OBJECT (back_button), "clicked",
+		    G_CALLBACK (goto_page), GINT_TO_POINTER (page_num - 1));
+
+  GtkWidget *fwd_button = gtk_button_new_with_label ("â");
+  gtk_widget_set_halign (fwd_button, GTK_ALIGN_END);
+  gtk_box_pack_end (GTK_BOX (hbox), fwd_button, FALSE, FALSE, 0);
+  g_signal_connect (G_OBJECT (fwd_button), "clicked",
+		    G_CALLBACK (goto_page), GINT_TO_POINTER (page_num + 1));
+
+  GtkWidget *label = gtk_label_new (text);
+
+  gtk_box_pack_end (GTK_BOX (vbox), label, TRUE, TRUE, 0);
+
+  gtk_widget_show_all (vbox);
+  g_object_set_data_full (G_OBJECT (vbox), "display-name", text, g_free);
+
+  g_hash_table_insert (pages, GINT_TO_POINTER (page_num), vbox);
+
+  return vbox;
+}
+
+static void
+on_page_change (CcNotebook *notebook)
+{
+  g_print (G_STRLOC ": Currently selected page: %s\n",
+           (char *) g_object_get_data (G_OBJECT (cc_notebook_get_selected_page (notebook)), "display-name"));
+}
+
+int
+main (int argc, char *argv[])
+{
+  guint i;
+
+  if (gtk_clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
+    return EXIT_FAILURE;
+
+  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+  gtk_widget_show (window);
+
+  notebook = cc_notebook_new ();
+  gtk_container_add (GTK_CONTAINER (window), notebook);
+  g_signal_connect (notebook, "notify::current-page", G_CALLBACK (on_page_change), NULL);
+
+  pages = g_hash_table_new (g_direct_hash, g_direct_equal);
+
+  for (i = 1; i <= NUM_PAGES; i++) {
+    GtkWidget *page = create_page_contents (i);
+    cc_notebook_add_page ((CcNotebook *) notebook, page);
+  }
+
+  gtk_widget_show_all (window);
+
+  gtk_main ();
+
+  return EXIT_SUCCESS;
+}
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