reviewed by: Matthias Clasen <mclasen@redhat.com>

2007-05-19  Bastien Nocera  <hadess@hadess.net>

	reviewed by: Matthias Clasen <mclasen@redhat.com>

	* gtk/Makefile.am:
	* gtk/gtk.h:
	* gtk/gtk.symbols:
	* gtk/gtkscalebutton.[ch]: Add the GtkScaleButton widget,
	a button that pops up a scale when pressed

2007-05-19  Bastien Nocera  <hadess@hadess.net>

	* POTFILES.in: Add scale button to the list

2007-05-20  Bastien Nocera  <hadess@hadess.net>

	* gtk/gtk-docs.sgml:
	* gtk/gtk-sections.txt: add the GtkScaleButton widget
	to the docs


svn path=/trunk/; revision=17876

5 files changed, 1355 insertions, 0 deletions

diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 3097d2054..0f514e80a 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -259,6 +259,7 @@ gtk_public_h_sources =          \
 	gtkrecentmanager.h 	\
 	gtkruler.h		\
 	gtkscale.h		\
+	gtkscalebutton.h	\
 	gtkscrollbar.h		\
 	gtkscrolledwindow.h	\
 	gtkselection.h		\
@@ -533,6 +534,7 @@ gtk_base_c_sources =            \
 	gtkrecentmanager.c 	\
 	gtkruler.c		\
 	gtkscale.c		\
+	gtkscalebutton.c	\
 	gtkscrollbar.c		\
 	gtkscrolledwindow.c	\
 	gtkselection.c		\
diff --git a/gtk/gtk.h b/gtk/gtk.h
index 1fa2d0c8f..d0ab19586 100644
--- a/gtk/gtk.h
+++ b/gtk/gtk.h
@@ -150,6 +150,7 @@
 #include <gtk/gtkrecentmanager.h>
 #include <gtk/gtkruler.h>
 #include <gtk/gtkscale.h>
+#include <gtk/gtkscalebutton.h>
 #include <gtk/gtkscrollbar.h>
 #include <gtk/gtkscrolledwindow.h>
 #include <gtk/gtkselection.h>
diff --git a/gtk/gtk.symbols b/gtk/gtk.symbols
index 86b985763..3bcd95b42 100644
--- a/gtk/gtk.symbols
+++ b/gtk/gtk.symbols
@@ -3234,6 +3234,18 @@ gtk_scale_set_value_pos
 #endif
 #endif
 
+#if IN_HEADER(__GTK_SCALE_BUTTON_H__)
+#if IN_FILE(__GTK_SCALE_BUTTON_C__)
+gtk_scale_button_get_type G_GNUC_CONST
+gtk_scale_button_get_value
+gtk_scale_button_new
+gtk_scale_button_set_icons
+gtk_scale_button_set_value
+gtk_scale_button_get_adjustment
+gtk_scale_button_set_adjustment
+#endif
+#endif
+
 #if IN_HEADER(__GTK_SCROLLBAR_H__)
 #if IN_FILE(__GTK_SCROLLBAR_C__)
 gtk_scrollbar_get_type G_GNUC_CONST
diff --git a/gtk/gtkscalebutton.c b/gtk/gtkscalebutton.c
new file mode 100644
index 000000000..307a253df
--- /dev/null
+++ b/gtk/gtkscalebutton.c
@@ -0,0 +1,1246 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2005 Ronald S. Bultje
+ * Copyright (C) 2006, 2007 Christian Persch
+ * Copyright (C) 2006 Jan Arne Petersen
+ * Copyright (C) 2005-2007 Red Hat, Inc.
+ *
+ * Authors:
+ * - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * - Bastien Nocera <bnocera@redhat.com>
+ * - Jan Arne Petersen <jpetersen@jpetersen.org>
+ * - Christian Persch <chpe@svn.gnome.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GTK+ Team and others 2007.  See the AUTHORS
+ * file for a list of people on the GTK+ Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
+ */
+
+#include <config.h>
+
+#define _GNU_SOURCE
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "gtkmain.h"
+#include "gtkintl.h"
+#include "gtkrange.h"
+#include "gtkbindings.h"
+#include "gtkscale.h"
+#include "gtkvscale.h"
+#include "gtkframe.h"
+#include "gtkvbox.h"
+#include "gtkwindow.h"
+#include "gtkmarshalers.h"
+#include "gtkstock.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gdk/gdkkeysyms.h>
+#include "gtkscalebutton.h"
+
+#define SCALE_SIZE 100
+#define CLICK_TIMEOUT 250
+
+enum {
+  VALUE_CHANGED,
+  POPUP,
+  POPDOWN,
+  LAST_SIGNAL
+};
+
+enum {
+  PROP_0,
+  PROP_VALUE,
+  PROP_SIZE,
+  PROP_ADJUSTMENT
+};
+
+struct _GtkScaleButtonPrivate {
+  GtkWidget *dock, *scale, *image;
+  GtkIconSize size;
+  guint click_id;
+  gdouble direction;
+  guint32 pop_time;
+  gchar **icon_list;
+  gint click_timeout;
+  guint timeout : 1;
+} _GtkScaleButtonPrivate;
+
+static void	gtk_scale_button_class_init	(GtkScaleButtonClass *klass);
+static void	gtk_scale_button_init		(GtkScaleButton      *button);
+static void	gtk_scale_button_dispose	(GObject             *object);
+static void	gtk_scale_button_set_property	(GObject             *object,
+						 guint                prop_id,
+						 const GValue        *value,
+						 GParamSpec          *pspec);
+static void	gtk_scale_button_get_property	(GObject             *object,
+						 guint                prop_id,
+						 GValue              *value,
+						 GParamSpec          *pspec);
+static gboolean	gtk_scale_button_scroll		(GtkWidget           *widget,
+						 GdkEventScroll      *event);
+static void gtk_scale_button_screen_changed	(GtkWidget           *widget,
+						 GdkScreen           *previous_screen);
+static gboolean	gtk_scale_button_press		(GtkWidget           *widget,
+						 GdkEventButton      *event);
+static gboolean gtk_scale_button_key_release	(GtkWidget           *widget,
+    						 GdkEventKey         *event);
+static void gtk_scale_button_popup_from_bindings (GtkWidget *widget);
+static void gtk_scale_button_popdown_from_bindings (GtkWidget *widget);
+static gboolean cb_dock_button_press		(GtkWidget           *widget,
+						 GdkEventButton      *event,
+						 gpointer             user_data);
+static gboolean cb_dock_key_release		(GtkWidget           *widget,
+						 GdkEventKey         *event,
+						 gpointer             user_data);
+static gboolean cb_button_press			(GtkWidget           *widget,
+						 GdkEventButton      *event,
+						 gpointer             user_data);
+static gboolean cb_button_release		(GtkWidget           *widget,
+						 GdkEventButton      *event,
+						 gpointer             user_data);
+static void cb_dock_grab_notify			(GtkWidget           *widget,
+						 gboolean             was_grabbed,
+						 gpointer             user_data);
+static gboolean cb_dock_grab_broken_event	(GtkWidget           *widget,
+						 gboolean             was_grabbed,
+						 gpointer             user_data);
+static void cb_scale_grab_notify		(GtkWidget           *widget,
+						 gboolean             was_grabbed,
+						 gpointer             user_data);
+static void gtk_scale_button_update_icon	(GtkScaleButton      *button);
+static void gtk_scale_button_scale_value_changed(GtkRange            *range);
+
+/* see below for scale definitions */
+static GtkWidget *gtk_scale_button_scale_new	(GtkScaleButton      *button,
+						 gdouble              min,
+						 gdouble              max,
+						 gdouble              step);
+
+static GtkButtonClass *parent_class = NULL;
+static guint signals[LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (GtkScaleButton, gtk_scale_button, GTK_TYPE_BUTTON)
+
+static void
+gtk_scale_button_class_init (GtkScaleButtonClass *klass)
+{
+  GtkBindingSet *binding_set;
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->dispose = gtk_scale_button_dispose;
+  gobject_class->set_property = gtk_scale_button_set_property;
+  gobject_class->get_property = gtk_scale_button_get_property;
+  widget_class->button_press_event = gtk_scale_button_press;
+  widget_class->key_release_event = gtk_scale_button_key_release;
+  widget_class->scroll_event = gtk_scale_button_scroll;
+  widget_class->screen_changed = gtk_scale_button_screen_changed;
+
+  g_object_class_install_property (gobject_class,
+				   PROP_VALUE,
+				   g_param_spec_double ("value",
+							P_("Value"),
+							P_("The value of the scale"),
+							-G_MAXDOUBLE,
+							G_MAXDOUBLE,
+							0,
+							G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+				   PROP_SIZE,
+				   g_param_spec_enum ("size",
+						      P_("Icon size"),
+						      P_("The icon size"),
+						      GTK_TYPE_ICON_SIZE,
+						      GTK_ICON_SIZE_SMALL_TOOLBAR,
+						      G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_ADJUSTMENT,
+                                   g_param_spec_object ("adjustment",
+							P_("Adjustment"),
+							P_("The GtkAdjustment that contains the current value of this scale button object"),
+                                                        GTK_TYPE_ADJUSTMENT,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * GtkScaleButton::value-changed:
+   * @button: the object that received the signal
+   *
+   * Emitted when the value field has changed.
+   *
+   * Since: 2.12
+   *
+   */
+  signals[VALUE_CHANGED] =
+    g_signal_new (I_("value-changed"),
+		  G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (GtkScaleButtonClass, value_changed),
+		  NULL, NULL,
+		  _gtk_marshal_VOID__DOUBLE,
+		  G_TYPE_NONE, 1, G_TYPE_DOUBLE);
+  signals[POPUP] =
+    _gtk_binding_signal_new (I_("popup"),
+			     G_OBJECT_CLASS_TYPE (klass),
+			     G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			     G_CALLBACK (gtk_scale_button_popup_from_bindings),
+			     NULL, NULL,
+			     g_cclosure_marshal_VOID__VOID,
+			     G_TYPE_NONE, 0);
+  signals[POPDOWN] =
+    _gtk_binding_signal_new (I_("popdown"),
+			     G_OBJECT_CLASS_TYPE (klass),
+			     G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			     G_CALLBACK (gtk_scale_button_popdown_from_bindings),
+			     NULL, NULL,
+			     g_cclosure_marshal_VOID__VOID,
+			     G_TYPE_NONE, 0);
+
+  /* Key bindings */
+  binding_set = gtk_binding_set_by_class (widget_class);
+
+  gtk_binding_entry_add_signal (binding_set, GDK_space, 0,
+				"popup", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_Return, 0,
+				"popup", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_ISO_Enter, 0,
+				"popup", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_KP_Enter, 0,
+				"popup", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_Escape, 0,
+				"popdown", 0);
+}
+
+static void
+gtk_scale_button_init (GtkScaleButton *button)
+{
+  GtkWidget *frame, *box;
+  GtkScaleButtonPrivate *priv;
+
+  button->priv = g_new0 (GtkScaleButtonPrivate, 1);
+  priv = button->priv;
+
+  priv->timeout = FALSE;
+  priv->click_id = 0;
+  priv->click_timeout = CLICK_TIMEOUT;
+
+  gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+  gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
+
+  /* image */
+  priv->image = gtk_image_new ();
+  gtk_container_add (GTK_CONTAINER (button), priv->image);
+  gtk_widget_show_all (priv->image);
+
+  /* window */
+  priv->dock = gtk_window_new (GTK_WINDOW_POPUP);
+  g_signal_connect (priv->dock, "button-press-event",
+		    G_CALLBACK (cb_dock_button_press), button);
+  g_signal_connect (priv->dock, "key-release-event",
+		    G_CALLBACK (cb_dock_key_release), button);
+  g_signal_connect (priv->dock, "grab-notify",
+		    G_CALLBACK (cb_dock_grab_notify), button);
+  g_signal_connect (priv->dock, "grab-broken-event",
+		    G_CALLBACK (cb_dock_grab_broken_event), button);
+  gtk_window_set_decorated (GTK_WINDOW (priv->dock), FALSE);
+
+  /* frame */
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
+  gtk_container_add (GTK_CONTAINER (priv->dock), frame);
+  box = gtk_vbox_new (FALSE, 0);
+  gtk_container_add (GTK_CONTAINER (frame), box);
+
+  /* + */
+  button->plus_button = gtk_button_new_with_label ("+");
+  gtk_button_set_relief (GTK_BUTTON (button->plus_button), GTK_RELIEF_NONE);
+  g_signal_connect (button->plus_button, "button-press-event",
+		    G_CALLBACK (cb_button_press), button);
+  g_signal_connect (button->plus_button, "button-release-event",
+		    G_CALLBACK (cb_button_release), button);
+  gtk_box_pack_start (GTK_BOX (box), button->plus_button, TRUE, FALSE, 0);
+
+  /* scale */
+  priv->scale = gtk_scale_button_scale_new (button, 0., 100., 2.);
+  gtk_widget_set_size_request (priv->scale, -1, SCALE_SIZE);
+  gtk_scale_set_draw_value (GTK_SCALE (priv->scale), FALSE);
+  gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
+  gtk_box_pack_start (GTK_BOX (box), priv->scale, TRUE, FALSE, 0);
+  g_signal_connect (priv->scale, "grab-notify",
+		    G_CALLBACK (cb_scale_grab_notify), button);
+
+  /* - */
+  button->minus_button = gtk_button_new_with_label ("-");
+  gtk_button_set_relief (GTK_BUTTON (button->minus_button), GTK_RELIEF_NONE);
+  g_signal_connect (button->minus_button, "button-press-event",
+		   G_CALLBACK (cb_button_press), button);
+  g_signal_connect (button->minus_button, "button-release-event",
+		    G_CALLBACK (cb_button_release), button);
+  gtk_box_pack_start (GTK_BOX (box), button->minus_button, TRUE, FALSE, 0);
+
+  /* set button text and size */
+  priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
+  gtk_scale_button_update_icon (button);
+}
+
+static void
+gtk_scale_button_set_property (GObject       *object,
+			       guint          prop_id,
+			       const GValue  *value,
+			       GParamSpec    *pspec)
+{
+  GtkScaleButton *button;
+
+  button = GTK_SCALE_BUTTON (object);
+
+  switch (prop_id)
+    {
+    case PROP_VALUE:
+      gtk_scale_button_set_value (button, g_value_get_double (value));
+      break;
+    case PROP_SIZE:
+      {
+	GtkIconSize size;
+	size = g_value_get_enum (value);
+	if (button->priv->size != size)
+	  {
+	    button->priv->size = size;
+	    gtk_scale_button_update_icon (button);
+	  }
+      }
+      break;
+    case PROP_ADJUSTMENT:
+      gtk_scale_button_set_adjustment (button, g_value_get_object (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void 
+gtk_scale_button_get_property (GObject     *object,
+			       guint        prop_id,
+			       GValue      *value,
+			       GParamSpec  *pspec)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+
+  button = GTK_SCALE_BUTTON (object);
+  priv = button->priv;
+
+  switch (prop_id)
+    {
+    case PROP_VALUE:
+      g_value_set_float (value, gtk_scale_button_get_value (button));
+      break;
+    case PROP_SIZE:
+      g_value_set_enum (value, priv->size);
+      break;
+    case PROP_ADJUSTMENT:
+      g_value_set_object (value, gtk_scale_button_get_adjustment (button));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_scale_button_dispose (GObject *object)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+
+  button = GTK_SCALE_BUTTON (object);
+
+  priv = button->priv;
+
+  if (priv && priv->dock)
+    {
+      gtk_widget_destroy (priv->dock);
+      priv->dock = NULL;
+    }
+
+  if (priv && priv->click_id != 0)
+    {
+      g_source_remove (priv->click_id);
+      priv->click_id = 0;
+    }
+
+  if (priv && priv->icon_list)
+    {
+      g_strfreev (priv->icon_list);
+      priv->icon_list = NULL;
+    }
+
+  g_free (priv);
+  button->priv = NULL;
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+/**
+ * gtk_scale_button_new
+ * @size: a stock icon size
+ * @lower: the minimum value of the scale (usually 0)
+ * @upper: the maximum value of the scale (usually 100)
+ * @step_increment: the stepping of value when a scroll-wheel event,
+ * or up/down arrow event occurs (usually 2)
+ * @icons: a %NULL-terminated array of icon names, or %NULL if
+ * you want to set the list later with gtk_scale_button_set_icons(). See
+ * gtk_scale_button_set_icons() for details.
+ *
+ * Creates a #GtkScaleButton, with a range between lower and upper, with
+ * a stepping of step_increment.
+ *
+ * Return value: a new #GtkScaleButton
+ *
+ * Since: 2.12
+ */
+GtkWidget *
+gtk_scale_button_new (GtkIconSize   size,
+		      gdouble       lower,
+		      gdouble       upper,
+		      gdouble       step_increment,
+		      const gchar **icons)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+
+  button = g_object_new (GTK_TYPE_SCALE_BUTTON, NULL);
+  priv = button->priv;
+
+  if (icons != NULL)
+    gtk_scale_button_set_icons (button, icons);
+
+  gtk_range_set_range (GTK_RANGE (priv->scale), lower, upper);
+  gtk_range_set_increments (GTK_RANGE (priv->scale),
+			    step_increment,
+			    10 * step_increment);
+
+  if (priv->size != size)
+    {
+      priv->size = size;
+      gtk_scale_button_update_icon (button);
+    }
+
+  return GTK_WIDGET (button);
+}
+
+/**
+ * gtk_scale_button_get_value
+ * @button: a #GtkScaleButton
+ *
+ * Gets the current value of the scale button.
+ *
+ * Return value: current value of the scale button
+ *
+ * Since: 2.12
+ */
+gdouble
+gtk_scale_button_get_value (GtkScaleButton * button)
+{
+  GtkScaleButtonPrivate *priv;
+
+  g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
+
+  priv = button->priv;
+
+  return gtk_range_get_value (GTK_RANGE (priv->scale));
+}
+
+/**
+ * gtk_scale_button_set_value
+ * @button: a #GtkScaleButton
+ * @value: new value of the scale button
+ *
+ * Sets the current value of the scale; if the value is outside the minimum or 
+ * maximum range values, it will be clamped to fit inside them. The scale button 
+ * emits the "value_changed" signal if the value changes.
+ *
+ * Since: 2.12
+ */
+void
+gtk_scale_button_set_value (GtkScaleButton *button,
+			    gdouble         value)
+{
+  GtkScaleButtonPrivate *priv;
+
+  g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
+
+  priv = button->priv;
+
+  gtk_range_set_value (GTK_RANGE (priv->scale), value);
+}
+
+/**
+ * gtk_scale_button_set_icons
+ * @button: a #GtkScaleButton
+ * @icons: a %NULL-terminated array of icon names
+ *
+ * Sets the icons to be used by the scale button. The first item in the array 
+ * will be used in the button when the current value is the lowest value, the 
+ * second item for the highest value. All the subsequent icons will be used for 
+ * all the other values, spread evenly over the range of values.
+ *
+ * If there's only one icon in the @icons array, it will be used for all the
+ * values. If only two icons are in the @icons array, the first one will be
+ * used for the bottom 50% of the scale, and the second one for the top 50%.
+ * So it is recommended to use at least 3 icons so that the #GtkScaleButton
+ * reflects the current value of the scale better for the users.
+ *
+ * Since 2.12
+ */
+void
+gtk_scale_button_set_icons (GtkScaleButton  *button,
+			    const gchar    **icons)
+{
+  GtkScaleButtonPrivate *priv;
+
+  g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
+  g_return_if_fail (icons != NULL);
+  g_return_if_fail (icons[0] != NULL);
+
+  priv = button->priv;
+
+  g_strfreev (priv->icon_list);
+  priv->icon_list = g_strdupv ((gchar **) icons);
+  gtk_scale_button_update_icon (button);
+}
+
+/**
+ * gtk_scale_button_get_adjustment
+ * @button: a #GtkScaleButton
+ *
+ * Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
+ * See gtk_range_get_adjustment() for details.
+ *
+ * Since: 2.12
+ */
+GtkAdjustment*
+gtk_scale_button_get_adjustment	(GtkScaleButton *button)
+{
+  GtkRange *range;
+
+  g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
+
+  range = GTK_RANGE (button->priv->scale);
+  g_return_val_if_fail (range != NULL, NULL);
+
+  return gtk_range_get_adjustment (range);
+}
+
+/**
+ * gtk_scale_button_set_adjustment
+ * @button: a #GtkScaleButton
+ * @adjustment: a #GtkAdjustment
+ *
+ * Sets the #GtkAdjustment to be used as a model for the #GtkScaleButton's scale.
+ * See gtk_range_set_adjustment() for details.
+ *
+ * Since: 2.12
+ */
+void
+gtk_scale_button_set_adjustment	(GtkScaleButton *button,
+				 GtkAdjustment  *adjustment)
+{
+  g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
+  g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+  gtk_range_set_adjustment (GTK_RANGE (button->priv->scale),
+			    adjustment);
+}
+
+/*
+ * button callbacks.
+ */
+
+static gboolean
+gtk_scale_button_scroll (GtkWidget      *widget,
+			 GdkEventScroll *event)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+  GtkAdjustment *adj;
+  gdouble d;
+
+  button = GTK_SCALE_BUTTON (widget);
+  priv = button->priv;
+  adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
+
+  if (event->type != GDK_SCROLL)
+    return FALSE;
+
+  d = gtk_scale_button_get_value (button);
+  if (event->direction == GDK_SCROLL_UP)
+    {
+      d += adj->step_increment;
+      if (d > adj->upper)
+	d = adj->upper;
+    }
+  else
+    {
+      d -= adj->step_increment;
+      if (d < adj->lower)
+	d = adj->lower;
+    }
+  gtk_scale_button_set_value (button, d);
+
+  return TRUE;
+}
+
+static void
+gtk_scale_button_screen_changed (GtkWidget *widget,
+				 GdkScreen *previous_screen)
+{
+  GtkScaleButton *button = (GtkScaleButton *) widget;
+  GtkScaleButtonPrivate *priv;
+  GdkScreen *screen;
+  GValue value = { 0, };
+
+  if (gtk_widget_has_screen (widget) == FALSE)
+    return;
+
+  priv = button->priv;
+
+  screen = gtk_widget_get_screen (widget);
+  g_value_init (&value, G_TYPE_INT);
+  if (gdk_screen_get_setting (screen,
+			      "gtk-double-click-time",
+			      &value) == FALSE)
+    {
+      priv->click_timeout = CLICK_TIMEOUT;
+      return;
+    }
+
+  priv->click_timeout = g_value_get_int (&value);
+}
+
+static gboolean
+gtk_scale_popup (GtkWidget *widget,
+		 GdkEvent  *event,
+		 guint32    time)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+  GtkAdjustment *adj;
+  gint x, y, m, dx, dy, sx, sy, ystartoff;
+  gdouble v;
+  GdkDisplay *display;
+  GdkScreen *screen;
+
+  button = GTK_SCALE_BUTTON (widget);
+  priv = button->priv;
+  adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
+
+  display = gtk_widget_get_display (widget);
+  screen = gtk_widget_get_screen (widget);
+
+  /* position roughly */
+  gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
+
+  gdk_window_get_origin (widget->window, &x, &y);
+  x += widget->allocation.x;
+  y += widget->allocation.y;
+  gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
+  gtk_widget_show_all (priv->dock);
+  gdk_window_get_origin (priv->dock->window, &dx, &dy);
+  dy += priv->dock->allocation.y;
+  gdk_window_get_origin (priv->scale->window, &sx, &sy);
+  sy += priv->scale->allocation.y;
+  ystartoff = sy - dy;
+  priv->timeout = TRUE;
+
+  /* position (needs widget to be shown already) */
+  v = gtk_scale_button_get_value (button) / (adj->upper - adj->lower);
+  x += (widget->allocation.width - priv->dock->allocation.width) / 2;
+  y -= ystartoff;
+  y -= GTK_RANGE (priv->scale)->min_slider_size / 2;
+  m = priv->scale->allocation.height -
+      GTK_RANGE (priv->scale)->min_slider_size;
+  y -= m * (1.0 - v);
+
+  /* Make sure the dock stays inside the monitor */
+  if (event->type == GDK_BUTTON_PRESS)
+    {
+      int monitor;
+      GdkEventButton *button_event = (GdkEventButton *) event;
+      GdkRectangle rect;
+      GtkWidget *d;
+
+      d = GTK_WIDGET (priv->dock);
+      monitor = gdk_screen_get_monitor_at_point (screen,
+						 button_event->x,
+						 button_event->y);
+      gdk_screen_get_monitor_geometry (screen, monitor, &rect);
+
+      y += button_event->y;
+      if (y < rect.y)
+	y = rect.y;
+      else if (y + d->allocation.height > rect.height + rect.y)
+	y = rect.y + rect.height - d->allocation.height;
+
+      if (x < rect.x)
+	x = rect.x;
+      else if (x + d->allocation.width > rect.width - rect.x)
+	x = rect.x + rect.width - d->allocation.width;
+    }
+
+  gtk_window_move (GTK_WINDOW (priv->dock), x, y);
+
+  if (event->type == GDK_BUTTON_PRESS)
+    GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, (GdkEventButton *) event);
+
+  /* grab focus */
+  gtk_grab_add (priv->dock);
+
+  if (gdk_pointer_grab (priv->dock->window, TRUE,
+			GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
+			GDK_POINTER_MOTION_MASK, NULL, NULL, time)
+      != GDK_GRAB_SUCCESS)
+    {
+      gtk_grab_remove (priv->dock);
+      gtk_widget_hide (priv->dock);
+      return FALSE;
+    }
+
+  if (gdk_keyboard_grab (priv->dock->window, TRUE, time) != GDK_GRAB_SUCCESS)
+    {
+      gdk_display_pointer_ungrab (display, time);
+      gtk_grab_remove (priv->dock);
+      gtk_widget_hide (priv->dock);
+      return FALSE;
+    }
+
+  gtk_widget_grab_focus (priv->dock);
+
+  if (event->type == GDK_BUTTON_PRESS)
+    {
+      GdkEventButton *e;
+      GdkEventButton *button_event = (GdkEventButton *) event;
+
+      /* forward event to the slider */
+      e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
+      e->window = priv->scale->window;
+
+      /* position: the X position isn't relevant, halfway will work just fine.
+       * The vertical position should be *exactly* in the middle of the slider
+       * of the scale; if we don't do that correctly, it'll move from its current
+       * position, which means a position change on-click, which is bad. */
+      e->x = priv->scale->allocation.width / 2;
+      m = priv->scale->allocation.height -
+	GTK_RANGE (priv->scale)->min_slider_size;
+      e->y = ((1.0 - v) * m) + GTK_RANGE (priv->scale)->min_slider_size / 2;
+      gtk_widget_event (priv->scale, (GdkEvent *) e);
+      e->window = button_event->window;
+      gdk_event_free ((GdkEvent *) e);
+    }
+
+  gtk_widget_grab_focus (priv->scale);
+
+  priv->pop_time = time;
+
+  return TRUE;
+}
+
+static gboolean
+gtk_scale_button_press (GtkWidget      *widget,
+			GdkEventButton *event)
+{
+  return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
+}
+
+static void
+gtk_scale_button_popup_from_bindings (GtkWidget *widget)
+{
+  GdkEvent *ev;
+
+  ev = gdk_event_new (GDK_KEY_RELEASE);
+  gtk_scale_popup (widget, ev, GDK_CURRENT_TIME);
+  gdk_event_free (ev);
+}
+
+static gboolean
+gtk_scale_button_key_release (GtkWidget   *widget,
+			      GdkEventKey *event)
+{
+  return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
+}
+
+/* This is called when the grab is broken for
+ * either the dock, or the scale itself */
+static void
+gtk_scale_button_grab_notify (GtkScaleButton *button,
+			      gboolean        was_grabbed)
+{
+  GdkDisplay *display;
+  GtkScaleButtonPrivate *priv;
+
+  if (was_grabbed != FALSE)
+    return;
+
+  priv = button->priv;
+
+  if (gtk_widget_is_ancestor (gtk_grab_get_current (), priv->dock))
+    return;
+
+  display = gtk_widget_get_display (priv->dock);
+  gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
+  gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
+  gtk_grab_remove (priv->dock);
+
+  /* hide again */
+  gtk_widget_hide (priv->dock);
+  priv->timeout = FALSE;
+}
+
+/*
+ * +/- button callbacks.
+ */
+
+static gboolean
+cb_button_timeout (gpointer user_data)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+  GtkAdjustment *adj;
+  gdouble val;
+  gboolean res = TRUE;
+
+  button = GTK_SCALE_BUTTON (user_data);
+  priv = button->priv;
+
+  if (priv->click_id == 0)
+    return FALSE;
+
+  adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
+
+  val = gtk_scale_button_get_value (button);
+  val += priv->direction;
+  if (val <= adj->lower)
+    {
+      res = FALSE;
+      val = adj->lower;
+    }
+  else if (val > adj->upper)
+    {
+      res = FALSE;
+      val = adj->upper;
+    }
+  gtk_scale_button_set_value (button, val);
+
+  if (!res)
+    {
+      g_source_remove (priv->click_id);
+      priv->click_id = 0;
+    }
+
+  return res;
+}
+
+static gboolean
+cb_button_press (GtkWidget      *widget,
+		 GdkEventButton *event,
+		 gpointer        user_data)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+  GtkAdjustment *adj;
+
+  button = GTK_SCALE_BUTTON (user_data);
+  priv = button->priv;
+  adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
+
+  if (priv->click_id != 0)
+    g_source_remove (priv->click_id);
+
+  if (widget == button->plus_button)
+    priv->direction = fabs (adj->page_increment);
+  else
+    priv->direction = - fabs (adj->page_increment);
+
+  priv->click_id = g_timeout_add (priv->click_timeout,
+				  (GSourceFunc) cb_button_timeout, button);
+  cb_button_timeout (button);
+
+  return TRUE;
+}
+
+static gboolean
+cb_button_release (GtkWidget      *widget,
+		   GdkEventButton *event,
+		   gpointer        user_data)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+
+  button = GTK_SCALE_BUTTON (user_data);
+  priv = button->priv;
+
+  if (priv->click_id != 0)
+    {
+      g_source_remove (priv->click_id);
+      priv->click_id = 0;
+    }
+
+  return TRUE;
+}
+
+static void
+cb_dock_grab_notify (GtkWidget *widget,
+		     gboolean   was_grabbed,
+		     gpointer   user_data)
+{
+  GtkScaleButton *button = (GtkScaleButton *) user_data;
+
+  gtk_scale_button_grab_notify (button, was_grabbed);
+}
+
+static gboolean
+cb_dock_grab_broken_event (GtkWidget *widget,
+			   gboolean   was_grabbed,
+			   gpointer   user_data)
+{
+  GtkScaleButton *button = (GtkScaleButton *) user_data;
+
+  gtk_scale_button_grab_notify (button, FALSE);
+
+  return FALSE;
+}
+
+/*
+ * Scale callbacks.
+ */
+
+static void
+gtk_scale_button_release_grab (GtkScaleButton *button,
+			       GdkEventButton *event)
+{
+  GdkEventButton *e;
+  GdkDisplay *display;
+  GtkScaleButtonPrivate *priv;
+
+  priv = button->priv;
+
+  /* ungrab focus */
+  display = gtk_widget_get_display (GTK_WIDGET (button));
+  gdk_display_keyboard_ungrab (display, event->time);
+  gdk_display_pointer_ungrab (display, event->time);
+  gtk_grab_remove (priv->dock);
+
+  /* hide again */
+  gtk_widget_hide (priv->dock);
+  priv->timeout = FALSE;
+
+  e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
+  e->window = GTK_WIDGET (button)->window;
+  e->type = GDK_BUTTON_RELEASE;
+  gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
+  e->window = event->window;
+  gdk_event_free ((GdkEvent *) e);
+}
+
+static gboolean
+cb_dock_button_press (GtkWidget      *widget,
+		      GdkEventButton *event,
+		      gpointer        user_data)
+{
+  GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
+
+  if (event->type == GDK_BUTTON_PRESS)
+    {
+      gtk_scale_button_release_grab (button, event);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static void
+gtk_scale_button_popdown_from_bindings (GtkWidget *widget)
+{
+  GtkScaleButton *button;
+  GtkScaleButtonPrivate *priv;
+  GdkDisplay *display;
+
+  button = GTK_SCALE_BUTTON (widget);
+  priv = button->priv;
+
+  /* ungrab focus */
+  display = gtk_widget_get_display (widget);
+  gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
+  gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
+  gtk_grab_remove (priv->dock);
+
+  /* hide again */
+  gtk_widget_hide (priv->dock);
+  priv->timeout = FALSE;
+}
+
+static gboolean
+cb_dock_key_release (GtkWidget   *widget,
+		     GdkEventKey *event,
+		     gpointer     user_data)
+{
+  if (event->keyval == GDK_Escape)
+    {
+      gtk_scale_button_popdown_from_bindings (GTK_WIDGET (user_data));
+      return TRUE;
+    }
+
+  if (!gtk_bindings_activate_event (GTK_OBJECT (widget), event))
+    {
+      /* The popup hasn't managed the event, pass onto the button */
+      gtk_bindings_activate_event (GTK_OBJECT (user_data), event);
+    }
+
+  return TRUE;
+}
+
+static void
+cb_scale_grab_notify (GtkWidget *widget,
+		      gboolean   was_grabbed,
+		      gpointer   user_data)
+{
+  GtkScaleButton *button = (GtkScaleButton *) user_data;
+
+  gtk_scale_button_grab_notify (button, was_grabbed);
+}
+
+/*
+ * Scale stuff.
+ */
+
+#define GTK_TYPE_SCALE_BUTTON_SCALE \
+  (gtk_scale_button_scale_get_type ())
+#define GTK_SCALE_BUTTON_SCALE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, \
+			       GtkScaleButtonScale))
+
+typedef struct _GtkScaleButtonScaleClass {
+  GtkVScaleClass parent_class;
+} GtkScaleButtonScaleClass;
+
+typedef struct _GtkScaleButtonScale {
+  GtkVScale parent;
+  GtkScaleButton *button;
+} GtkScaleButtonScale;
+
+static GType	gtk_scale_button_scale_get_type	  (void);
+static void	gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass);
+static gboolean	gtk_scale_button_scale_press	  (GtkWidget                *widget,
+						   GdkEventButton           *event);
+static gboolean gtk_scale_button_scale_release	  (GtkWidget                *widget,
+						   GdkEventButton           *event);
+
+static GtkVScaleClass *scale_parent_class = NULL;
+
+G_DEFINE_TYPE (GtkScaleButtonScale, gtk_scale_button_scale, GTK_TYPE_VSCALE)
+
+static void
+gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
+{
+  GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
+  GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
+
+  scale_parent_class = g_type_class_peek_parent (klass);
+
+  gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
+  gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
+  gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
+}
+
+static void
+gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
+{
+}
+
+static GtkWidget *
+gtk_scale_button_scale_new (GtkScaleButton *button,
+			    gdouble         min,
+			    gdouble         max,
+			    gdouble         step)
+{
+  GtkScaleButtonScale *scale;
+  GtkScaleButtonPrivate *priv;
+  GtkObject *adj;
+
+  priv = button->priv;
+  scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE, NULL);
+  adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
+  gtk_range_set_adjustment (GTK_RANGE (scale), GTK_ADJUSTMENT (adj));
+  scale->button = button;
+
+  return GTK_WIDGET (scale);
+}
+
+static gboolean
+gtk_scale_button_scale_press (GtkWidget      *widget,
+			      GdkEventButton *event)
+{
+  GtkScaleButtonScale *scale;
+  GtkScaleButtonPrivate *priv;
+
+  scale = GTK_SCALE_BUTTON_SCALE (widget);
+  priv = scale->button->priv;
+
+  /* the scale will grab input; if we have input grabbed, all goes
+   * horribly wrong, so let's not do that. */
+  gtk_grab_remove (priv->dock);
+
+  return GTK_WIDGET_CLASS (scale_parent_class)->button_press_event (widget, event);
+}
+
+static gboolean
+gtk_scale_button_scale_release (GtkWidget      *widget,
+				GdkEventButton *event)
+{
+  GtkScaleButtonScale *scale;
+  GtkScaleButtonPrivate *priv;
+  gboolean res;
+
+  scale = GTK_SCALE_BUTTON_SCALE (widget);
+  priv = scale->button->priv;
+
+  if (priv->timeout)
+    {
+      /* if we did a quick click, leave the window open; else, hide it */
+      if (event->time > priv->pop_time + priv->click_timeout)
+        {
+	  gtk_scale_button_release_grab (scale->button, event);
+	  GTK_WIDGET_CLASS (scale_parent_class)->button_release_event (widget, event);
+	  return TRUE;
+	}
+      priv->timeout = FALSE;
+    }
+
+  res = GTK_WIDGET_CLASS (scale_parent_class)->button_release_event (widget, event);
+
+  /* the scale will release input; right after that, we *have to* grab
+   * it back so we can catch out-of-scale clicks and hide the popup,
+   * so I basically want a g_signal_connect_after_always(), but I can't
+   * find that, so we do this complex 'first-call-parent-then-do-actual-
+   * action' thingy... */
+  gtk_grab_add (priv->dock);
+
+  return res;
+}
+
+static void
+gtk_scale_button_update_icon (GtkScaleButton *button)
+{
+  GtkScaleButtonPrivate *priv;
+  GtkRange *range;
+  GtkAdjustment *adj;
+  gdouble value;
+  const gchar *name;
+  guint num_icons;
+
+  priv = button->priv;
+
+  if (priv->icon_list == NULL || priv->icon_list[0] == NULL)
+    {
+      gtk_image_set_from_stock (GTK_IMAGE (priv->image),
+				GTK_STOCK_MISSING_IMAGE,
+				priv->size);
+      return;
+    }
+
+  for (num_icons = 0; priv->icon_list[num_icons] != NULL; num_icons++) {}
+
+  /* The 1-icon special case */
+  if (num_icons == 1)
+    {
+      gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
+				    priv->icon_list[0],
+				    priv->size);
+      return;
+    }
+
+  range = GTK_RANGE (priv->scale);
+  adj = gtk_range_get_adjustment (range);
+  value = gtk_scale_button_get_value (button);
+
+  /* The 2-icons special case */
+  if (num_icons == 2)
+    {
+      gdouble limit;
+      limit = (adj->upper - adj->lower) / 2 + adj->lower;
+      if (value < limit)
+	name = priv->icon_list[0];
+      else
+	name = priv->icon_list[1];
+
+      gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
+				    name,
+				    priv->size);
+      return;
+    }
+
+  /* With 3 or more icons */
+  if (value == adj->lower)
+    {
+      name = priv->icon_list[0];
+    }
+  else if (value == adj->upper)
+    {
+      name = priv->icon_list[1];
+    }
+  else
+    {
+      gdouble step;
+      guint i;
+
+      step = (adj->upper - adj->lower) / (num_icons - 2);
+      i = (guint) (value - adj->lower) / step + 2;
+      g_assert (i < num_icons);
+      name = priv->icon_list[i];
+    }
+
+  gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
+				name,
+				priv->size);
+}
+
+static void
+gtk_scale_button_scale_value_changed (GtkRange *range)
+{
+  GtkScaleButtonScale *scale = GTK_SCALE_BUTTON_SCALE (range);
+  GtkScaleButton *button = scale->button;
+  gdouble value;
+
+  value = gtk_range_get_value (range);
+
+  gtk_scale_button_update_icon (button);
+
+  g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
+  g_object_notify (G_OBJECT (button), "value");
+}
+ 
+/*
+ * vim: sw=2 ts=8 cindent noai bs=2
+ */
diff --git a/gtk/gtkscalebutton.h b/gtk/gtkscalebutton.h
new file mode 100644
index 000000000..ee41caf54
--- /dev/null
+++ b/gtk/gtkscalebutton.h
@@ -0,0 +1,94 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2005 Ronald S. Bultje
+ * Copyright (C) 2006, 2007 Christian Persch
+ * Copyright (C) 2006 Jan Arne Petersen
+ * Copyright (C) 2007 Red Hat, Inc.
+ *
+ * Authors:
+ * - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * - Bastien Nocera <bnocera@redhat.com>
+ * - Jan Arne Petersen <jpetersen@jpetersen.org>
+ * - Christian Persch <chpe@svn.gnome.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GTK+ Team and others 2007.  See the AUTHORS
+ * file for a list of people on the GTK+ Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
+ */
+
+#ifndef __GTK_SCALE_BUTTON_H__
+#define __GTK_SCALE_BUTTON_H__
+
+#include <gtk/gtkbutton.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_SCALE_BUTTON                 (gtk_scale_button_get_type ())
+#define GTK_SCALE_BUTTON(obj)                 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON, GtkScaleButton))
+#define GTK_SCALE_BUTTON_CLASS(klass)         (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_SCALE_BUTTON, GtkScaleButtonClass))
+#define GTK_IS_SCALE_BUTTON(obj)              (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON))
+#define GTK_IS_SCALE_BUTTON_CLASS(klass)      (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_SCALE_BUTTON))
+#define GTK_SCALE_BUTTON_GET_CLASS(obj)       (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_SCALE_BUTTON, GtkScaleButtonClass))
+
+typedef struct _GtkScaleButton        GtkScaleButton;
+typedef struct _GtkScaleButtonClass   GtkScaleButtonClass;
+typedef struct _GtkScaleButtonPrivate GtkScaleButtonPrivate;
+
+struct _GtkScaleButtonClass
+{
+  GtkButtonClass parent_class;
+
+  /* signals */
+  void	(* value_changed) (GtkScaleButton *button, gdouble value);
+
+  /* Padding for future expansion */
+  void (*_gtk_reserved1) (void);
+  void (*_gtk_reserved2) (void);
+  void (*_gtk_reserved3) (void);
+  void (*_gtk_reserved4) (void);
+};
+
+struct _GtkScaleButton
+{
+  GtkButton              parent;
+  GtkWidget             *plus_button;
+  GtkWidget             *minus_button;
+  GtkScaleButtonPrivate *priv;
+};
+
+GType		gtk_scale_button_get_type	(void) G_GNUC_CONST;
+GtkWidget*	gtk_scale_button_new		(GtkIconSize     size,
+						 gdouble         min,
+						 gdouble         max,
+						 gdouble         step,
+						 const gchar   **icons);
+void		gtk_scale_button_set_icons	(GtkScaleButton *button,
+						 const gchar  **icons);
+gdouble		gtk_scale_button_get_value	(GtkScaleButton *button);
+void		gtk_scale_button_set_value	(GtkScaleButton *button,
+						 gdouble         value);
+GtkAdjustment*	gtk_scale_button_get_adjustment	(GtkScaleButton *button);
+void		gtk_scale_button_set_adjustment	(GtkScaleButton *button,
+						 GtkAdjustment  *adjustment);
+
+G_END_DECLS
+
+#endif /* __GTK_SCALE_BUTTON_H__ */
+