Move GIMP widgets to their own folder

(bzr r15043.1.2)

10 files changed, 2665 insertions, 40 deletions

diff --git a/src/widgets/CMakeLists.txt b/src/widgets/CMakeLists.txt
index 47ffe82ac..b2071af4e 100644
--- a/src/widgets/CMakeLists.txt
+++ b/src/widgets/CMakeLists.txt
@@ -1,24 +1,25 @@
+add_subdirectory(gimp)
 
 set(widgets_SRC
 	button.cpp
-	  arc-toolbar.cpp
-	  box3d-toolbar.cpp
-	  calligraphy-toolbar.cpp
-	  connector-toolbar.cpp
-	  dropper-toolbar.cpp
-	  eraser-toolbar.cpp
-	  lpe-toolbar.cpp
-	  measure-toolbar.cpp
-	  mesh-toolbar.cpp
-	  node-toolbar.cpp
-	  pencil-toolbar.cpp
-	  rect-toolbar.cpp
-	  spiral-toolbar.cpp
-	  spray-toolbar.cpp
-	  star-toolbar.cpp
-	  text-toolbar.cpp
-	  tweak-toolbar.cpp
-	  zoom-toolbar.cpp		
+	arc-toolbar.cpp
+	box3d-toolbar.cpp
+	calligraphy-toolbar.cpp
+	connector-toolbar.cpp
+	dropper-toolbar.cpp
+	eraser-toolbar.cpp
+	lpe-toolbar.cpp
+	measure-toolbar.cpp
+	mesh-toolbar.cpp
+	node-toolbar.cpp
+	pencil-toolbar.cpp
+	rect-toolbar.cpp
+	spiral-toolbar.cpp
+	spray-toolbar.cpp
+	star-toolbar.cpp
+	text-toolbar.cpp
+	tweak-toolbar.cpp
+	zoom-toolbar.cpp		
 	dash-selector.cpp
 	desktop-widget.cpp
 	eek-preview.cpp
@@ -40,7 +41,6 @@ set(widgets_SRC
 	ink-toggle-action.cpp
 	ink-tool-menu-action.cpp
 	paint-selector.cpp
-	ruler.cpp
 	select-toolbar.cpp
 	sp-attribute-widget.cpp
 	sp-color-selector.cpp
@@ -59,24 +59,24 @@ set(widgets_SRC
 	# -------
 	# Headers
 	button.h
-	  arc-toolbar.h
-	  box3d-toolbar.h
-	  calligraphy-toolbar.h
-	  connector-toolbar.h
-	  dropper-toolbar.h
-	  eraser-toolbar.h
-	  lpe-toolbar.h
-	  measure-toolbar.h
-	  mesh-toolbar.h
-	  node-toolbar.h
-	  pencil-toolbar.h
-	  rect-toolbar.h
-	  spiral-toolbar.h
-	  spray-toolbar.h
-	  star-toolbar.h
-	  text-toolbar.h
-	  tweak-toolbar.h
-	  zoom-toolbar.h	
+	arc-toolbar.h
+	box3d-toolbar.h
+	calligraphy-toolbar.h
+	connector-toolbar.h
+	dropper-toolbar.h
+	eraser-toolbar.h
+	lpe-toolbar.h
+	measure-toolbar.h
+	mesh-toolbar.h
+	node-toolbar.h
+	pencil-toolbar.h
+	rect-toolbar.h
+	spiral-toolbar.h
+	spray-toolbar.h
+	star-toolbar.h
+	text-toolbar.h
+	tweak-toolbar.h
+	zoom-toolbar.h	
 	dash-selector.h
 	desktop-widget.h
 	eek-preview.h
@@ -99,7 +99,6 @@ set(widgets_SRC
         ink-toggle-action.h
         ink-tool-menu-action.h
 	paint-selector.h
-	ruler.h
 	select-toolbar.h
 	sp-attribute-widget.h
 	sp-color-selector.h
diff --git a/src/widgets/desktop-widget.cpp b/src/widgets/desktop-widget.cpp
index aa485498e..bd72560c6 100644
--- a/src/widgets/desktop-widget.cpp
+++ b/src/widgets/desktop-widget.cpp
@@ -57,7 +57,7 @@
 
 // We're in the "widgets" directory, so no need to explicitly prefix these:
 #include "button.h"
-#include "ruler.h"
+#include "gimp/ruler.h"
 #include "spinbutton-events.h"
 #include "spw-utilities.h"
 #include "toolbox.h"
diff --git a/src/widgets/ege-adjustment-action.cpp b/src/widgets/ege-adjustment-action.cpp
index 8fef21741..6678d1e5a 100644
--- a/src/widgets/ege-adjustment-action.cpp
+++ b/src/widgets/ege-adjustment-action.cpp
@@ -47,7 +47,7 @@
 
 #include "icon-size.h"
 #include "widgets/ege-adjustment-action.h"
-#include "ui/widget/gimpspinscale.h"
+#include "gimp/gimpspinscale.h"
 #include "ui/icon-names.h"
 
 
diff --git a/src/widgets/gimp/CMakeLists.txt b/src/widgets/gimp/CMakeLists.txt
new file mode 100644
index 000000000..7b3e834e3
--- /dev/null
+++ b/src/widgets/gimp/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(gimpwidgets_SRC
+	gimpcolorwheel.c
+	gimpspinscale.c
+	ruler.cpp
+
+	# -------
+	# Headers
+	gimpcolorwheel.h
+	gimpspinscale.h
+	ruler.h
+)
+
+add_inkscape_source("${gimpwidgets_SRC}")
diff --git a/src/widgets/gimp/gimpcolorwheel.c b/src/widgets/gimp/gimpcolorwheel.c
new file mode 100644
index 000000000..212391497
--- /dev/null
+++ b/src/widgets/gimp/gimpcolorwheel.c
@@ -0,0 +1,1467 @@
+/* HSV color selector for GTK+
+ *
+ * Copyright (C) 1999 The Free Software Foundation
+ *
+ * Authors: Simon Budig <Simon.Budig@unix-ag.org> (original code)
+ *          Federico Mena-Quintero <federico@gimp.org> (cleanup for GTK+)
+ *          Jonathan Blandford <jrb@redhat.com> (cleanup for GTK+)
+ *          Michael Natterer <mitch@gimp.org> (ported back to GIMP)
+ *
+ * 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 1997-2000.  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/.
+ */
+
+/*
+ * This widget was adopted by Inkscape by Alex Valavanis <valavanisalex@gmail.com>
+ * on 2013-01-08.  Last merges with GIMP code were applied using the following
+ * commits from the GIMP git repository at 
+ * http://git.gnome.org/browse/gimp/tree/modules/gimpcolorwheel.c
+ *
+ * Gtk+ 2 code merge: commit 632c5 (2013-01-06)
+ * Gtk+ 3 code merge: commit bcfc6, gtk3-port branch (2013-01-06)
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "gimpcolorwheel.h"
+#include <math.h>
+
+
+/* Default ring fraction */
+#define DEFAULT_FRACTION 0.1
+
+/* Default width/height */
+#define DEFAULT_SIZE 100
+
+/* Default ring width */
+#define DEFAULT_RING_WIDTH 10
+
+
+/* Dragging modes */
+typedef enum
+{
+  DRAG_NONE,
+  DRAG_H,
+  DRAG_SV
+} DragMode;
+
+/* Private part of the GimpColorWheel structure */
+typedef struct
+{
+  /* Color value */
+  gdouble h;
+  gdouble s;
+  gdouble v;
+
+  /* ring_width is this fraction of size */
+  gdouble ring_fraction;
+
+  /* Size and ring width */
+  gint size;
+  gint ring_width;
+
+  /* Window for capturing events */
+  GdkWindow *window;
+
+  /* Dragging mode */
+  DragMode mode;
+
+  guint focus_on_ring : 1;
+} GimpColorWheelPrivate;
+
+enum
+{
+  CHANGED,
+  MOVE,
+  LAST_SIGNAL
+};
+
+static void     gimp_color_wheel_map            (GtkWidget          *widget);
+static void     gimp_color_wheel_unmap          (GtkWidget          *widget);
+static void     gimp_color_wheel_realize        (GtkWidget          *widget);
+static void     gimp_color_wheel_unrealize      (GtkWidget          *widget);
+static void     gimp_color_wheel_size_allocate  (GtkWidget          *widget,
+                                                 GtkAllocation      *allocation);
+static gboolean gimp_color_wheel_button_press   (GtkWidget          *widget,
+                                                 GdkEventButton     *event);
+static gboolean gimp_color_wheel_button_release (GtkWidget          *widget,
+                                                 GdkEventButton     *event);
+static gboolean gimp_color_wheel_motion         (GtkWidget          *widget,
+                                                 GdkEventMotion     *event);
+static gboolean gimp_color_wheel_draw           (GtkWidget          *widget,
+                                                 cairo_t            *cr);
+static void     gimp_color_wheel_get_preferred_width (GtkWidget     *widget,
+		                                 gint               *minimum_width,
+						 gint               *natural_width);
+static void     gimp_color_wheel_get_preferred_height (GtkWidget    *widget,
+		                                 gint               *minimum_height,
+						 gint               *natural_height);
+static gboolean gimp_color_wheel_grab_broken    (GtkWidget          *widget,
+                                                 GdkEventGrabBroken *event);
+static gboolean gimp_color_wheel_focus          (GtkWidget          *widget,
+                                                 GtkDirectionType    direction);
+static void     gimp_color_wheel_move           (GimpColorWheel     *wheel,
+                                                 GtkDirectionType    dir);
+
+
+static guint wheel_signals[LAST_SIGNAL];
+
+G_DEFINE_TYPE (GimpColorWheel, gimp_color_wheel, GTK_TYPE_WIDGET)
+
+#define parent_class gimp_color_wheel_parent_class
+
+
+static void
+gimp_color_wheel_class_init (GimpColorWheelClass *class)
+{
+  GObjectClass        *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass      *widget_class = GTK_WIDGET_CLASS (class);
+  GimpColorWheelClass *wheel_class  = GIMP_COLOR_WHEEL_CLASS (class);
+  GtkBindingSet       *binding_set;
+
+  widget_class->map                  = gimp_color_wheel_map;
+  widget_class->unmap                = gimp_color_wheel_unmap;
+  widget_class->realize              = gimp_color_wheel_realize;
+  widget_class->unrealize            = gimp_color_wheel_unrealize;
+  widget_class->size_allocate        = gimp_color_wheel_size_allocate;
+  widget_class->button_press_event   = gimp_color_wheel_button_press;
+  widget_class->button_release_event = gimp_color_wheel_button_release;
+  widget_class->motion_notify_event  = gimp_color_wheel_motion;
+  widget_class->get_preferred_width  = gimp_color_wheel_get_preferred_width;
+  widget_class->get_preferred_height = gimp_color_wheel_get_preferred_height;
+  widget_class->draw                 = gimp_color_wheel_draw;
+  widget_class->focus                = gimp_color_wheel_focus;
+  widget_class->grab_broken_event    = gimp_color_wheel_grab_broken;
+
+  wheel_class->move                  = gimp_color_wheel_move;
+
+  wheel_signals[CHANGED] =
+    g_signal_new ("changed",
+                  G_OBJECT_CLASS_TYPE (object_class),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpColorWheelClass, changed),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+
+  wheel_signals[MOVE] =
+    g_signal_new ("move",
+                  G_OBJECT_CLASS_TYPE (object_class),
+                  G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+                  G_STRUCT_OFFSET (GimpColorWheelClass, move),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__ENUM,
+                  G_TYPE_NONE, 1,
+                  GTK_TYPE_DIRECTION_TYPE);
+
+  binding_set = gtk_binding_set_by_class (class);
+
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_Up, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_UP);
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Up, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_UP);
+
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_Down, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_DOWN);
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Down, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_DOWN);
+
+
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_Right, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_RIGHT);
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Right, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_RIGHT);
+
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_Left, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_LEFT);
+  gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Left, 0,
+                                "move", 1,
+                                G_TYPE_ENUM, GTK_DIR_LEFT);
+
+  g_type_class_add_private (object_class, sizeof (GimpColorWheelPrivate));
+}
+
+static void
+gimp_color_wheel_init (GimpColorWheel *wheel)
+{
+  GimpColorWheelPrivate *priv;
+
+  priv = G_TYPE_INSTANCE_GET_PRIVATE (wheel, GIMP_TYPE_COLOR_WHEEL,
+                                      GimpColorWheelPrivate);
+
+  wheel->priv = priv;
+
+  gtk_widget_set_has_window (GTK_WIDGET (wheel), FALSE);
+  gtk_widget_set_can_focus (GTK_WIDGET (wheel), TRUE);
+
+  priv->ring_fraction = DEFAULT_FRACTION;
+  priv->size          = DEFAULT_SIZE;
+  priv->ring_width    = DEFAULT_RING_WIDTH;
+}
+
+static void
+gimp_color_wheel_map (GtkWidget *widget)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+
+  GTK_WIDGET_CLASS (parent_class)->map (widget);
+
+  gdk_window_show (priv->window);
+}
+
+static void
+gimp_color_wheel_unmap (GtkWidget *widget)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+
+  gdk_window_hide (priv->window);
+
+  GTK_WIDGET_CLASS (parent_class)->unmap (widget);
+}
+
+static void
+gimp_color_wheel_realize (GtkWidget *widget)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  GtkAllocation          allocation;
+  GdkWindowAttr          attr;
+  gint                   attr_mask;
+  GdkWindow             *parent_window;
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  gtk_widget_set_realized (widget, TRUE);
+
+  attr.window_type = GDK_WINDOW_CHILD;
+  attr.x           = allocation.x;
+  attr.y           = allocation.y;
+  attr.width       = allocation.width;
+  attr.height      = allocation.height;
+  attr.wclass      = GDK_INPUT_ONLY;
+  attr.event_mask  = (gtk_widget_get_events (widget) |
+                      GDK_KEY_PRESS_MASK      |
+                      GDK_BUTTON_PRESS_MASK   |
+                      GDK_BUTTON_RELEASE_MASK |
+                      GDK_POINTER_MOTION_MASK |
+                      GDK_ENTER_NOTIFY_MASK   |
+                      GDK_LEAVE_NOTIFY_MASK);
+
+  attr_mask = GDK_WA_X | GDK_WA_Y;
+
+  parent_window = gtk_widget_get_parent_window (widget);
+
+  gtk_widget_set_window (widget, parent_window);
+  g_object_ref (parent_window);
+
+  priv->window = gdk_window_new (parent_window, &attr, attr_mask);
+  gdk_window_set_user_data (priv->window, wheel);
+}
+
+static void
+gimp_color_wheel_unrealize (GtkWidget *widget)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+
+  gdk_window_set_user_data (priv->window, NULL);
+  gdk_window_destroy (priv->window);
+  priv->window = NULL;
+
+  GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
+}
+
+static void
+gimp_color_wheel_get_preferred_width (GtkWidget *widget,
+                                      gint      *minimum_width,
+				      gint      *natural_width)
+{
+  gint focus_width;
+  gint focus_pad;
+
+  gtk_widget_style_get (widget,
+                        "focus-line-width", &focus_width,
+                        "focus-padding", &focus_pad,
+                        NULL);
+  
+  *minimum_width = *natural_width = DEFAULT_SIZE + 2 * (focus_width + focus_pad);
+}
+
+static void
+gimp_color_wheel_get_preferred_height (GtkWidget *widget,
+                                       gint      *minimum_height,
+				       gint      *natural_height)
+{
+  gint focus_width;
+  gint focus_pad;
+
+  gtk_widget_style_get (widget,
+                        "focus-line-width", &focus_width,
+                        "focus-padding", &focus_pad,
+                        NULL);
+  
+  *minimum_height = *natural_height = DEFAULT_SIZE + 2 * (focus_width + focus_pad);
+}
+
+static void
+gimp_color_wheel_size_allocate (GtkWidget     *widget,
+                                GtkAllocation *allocation)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  gint                   focus_width;
+  gint                   focus_pad;
+
+  gtk_widget_set_allocation (widget, allocation);
+
+  gtk_widget_style_get (widget,
+                        "focus-line-width", &focus_width,
+                        "focus-padding",    &focus_pad,
+                        NULL);
+
+  priv->size = MIN (allocation->width  - 2 * (focus_width + focus_pad),
+                    allocation->height - 2 * (focus_width + focus_pad));
+
+  priv->ring_width = priv->size * priv->ring_fraction;
+
+  if (gtk_widget_get_realized (widget))
+    gdk_window_move_resize (priv->window,
+                            allocation->x,
+                            allocation->y,
+                            allocation->width,
+                            allocation->height);
+}
+
+
+/* Utility functions */
+
+#define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
+
+/* Converts from HSV to RGB */
+static void
+hsv_to_rgb (gdouble *h,
+            gdouble *s,
+            gdouble *v)
+{
+  gdouble hue, saturation, value;
+  gdouble f, p, q, t;
+
+  if (*s == 0.0)
+    {
+      *h = *v;
+      *s = *v;
+      *v = *v; /* heh */
+    }
+  else
+    {
+      hue = *h * 6.0;
+      saturation = *s;
+      value = *v;
+
+      if (hue == 6.0)
+        hue = 0.0;
+
+      f = hue - (int) hue;
+      p = value * (1.0 - saturation);
+      q = value * (1.0 - saturation * f);
+      t = value * (1.0 - saturation * (1.0 - f));
+
+      switch ((int) hue)
+        {
+        case 0:
+          *h = value;
+          *s = t;
+          *v = p;
+          break;
+
+        case 1:
+          *h = q;
+          *s = value;
+          *v = p;
+          break;
+
+        case 2:
+          *h = p;
+          *s = value;
+          *v = t;
+          break;
+
+        case 3:
+          *h = p;
+          *s = q;
+          *v = value;
+          break;
+
+        case 4:
+          *h = t;
+          *s = p;
+          *v = value;
+          break;
+
+        case 5:
+          *h = value;
+          *s = p;
+          *v = q;
+          break;
+
+        default:
+          g_assert_not_reached ();
+        }
+    }
+}
+
+/* Computes the vertices of the saturation/value triangle */
+static void
+compute_triangle (GimpColorWheel *wheel,
+                  gint           *hx,
+                  gint           *hy,
+                  gint           *sx,
+                  gint           *sy,
+                  gint           *vx,
+                  gint           *vy)
+{
+  GimpColorWheelPrivate *priv = wheel->priv;
+  GtkAllocation          allocation;
+  gdouble                center_x;
+  gdouble                center_y;
+  gdouble                inner, outer;
+  gdouble                angle;
+
+  gtk_widget_get_allocation (GTK_WIDGET (wheel), &allocation);
+
+  center_x = allocation.width / 2.0;
+  center_y = allocation.height / 2.0;
+
+  outer = priv->size / 2.0;
+  inner = outer - priv->ring_width;
+  angle = priv->h * 2.0 * G_PI;
+
+  *hx = floor (center_x + cos (angle) * inner + 0.5);
+  *hy = floor (center_y - sin (angle) * inner + 0.5);
+  *sx = floor (center_x + cos (angle + 2.0 * G_PI / 3.0) * inner + 0.5);
+  *sy = floor (center_y - sin (angle + 2.0 * G_PI / 3.0) * inner + 0.5);
+  *vx = floor (center_x + cos (angle + 4.0 * G_PI / 3.0) * inner + 0.5);
+  *vy = floor (center_y - sin (angle + 4.0 * G_PI / 3.0) * inner + 0.5);
+}
+
+/* Computes whether a point is inside the hue ring */
+static gboolean
+is_in_ring (GimpColorWheel *wheel,
+            gdouble         x,
+            gdouble         y)
+{
+  GimpColorWheelPrivate *priv = wheel->priv;
+  GtkAllocation          allocation;
+  gdouble                dx, dy, dist;
+  gdouble                center_x;
+  gdouble                center_y;
+  gdouble                inner, outer;
+
+  gtk_widget_get_allocation (GTK_WIDGET (wheel), &allocation);
+
+  center_x = allocation.width / 2.0;
+  center_y = allocation.height / 2.0;
+
+  outer = priv->size / 2.0;
+  inner = outer - priv->ring_width;
+
+  dx = x - center_x;
+  dy = center_y - y;
+  dist = dx * dx + dy * dy;
+
+  return (dist >= inner * inner && dist <= outer * outer);
+}
+
+/* Computes a saturation/value pair based on the mouse coordinates */
+static void
+compute_sv (GimpColorWheel *wheel,
+            gdouble         x,
+            gdouble         y,
+            gdouble        *s,
+            gdouble        *v)
+{
+  GtkAllocation allocation;
+  gint          ihx, ihy, isx, isy, ivx, ivy;
+  gdouble       hx, hy, sx, sy, vx, vy;
+  gdouble       center_x;
+  gdouble       center_y;
+
+  gtk_widget_get_allocation (GTK_WIDGET (wheel), &allocation);
+
+  compute_triangle (wheel, &ihx, &ihy, &isx, &isy, &ivx, &ivy);
+
+  center_x = allocation.width / 2.0;
+  center_y = allocation.height / 2.0;
+
+  hx = ihx - center_x;
+  hy = center_y - ihy;
+  sx = isx - center_x;
+  sy = center_y - isy;
+  vx = ivx - center_x;
+  vy = center_y - ivy;
+  x -= center_x;
+  y = center_y - y;
+
+  if (vx * (x - sx) + vy * (y - sy) < 0.0)
+    {
+      *s = 1.0;
+      *v = (((x - sx) * (hx - sx) + (y - sy) * (hy-sy))
+            / ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy)));
+
+      if (*v < 0.0)
+        *v = 0.0;
+      else if (*v > 1.0)
+        *v = 1.0;
+    }
+  else if (hx * (x - sx) + hy * (y - sy) < 0.0)
+    {
+      *s = 0.0;
+      *v = (((x - sx) * (vx - sx) + (y - sy) * (vy - sy))
+            / ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy)));
+
+      if (*v < 0.0)
+        *v = 0.0;
+      else if (*v > 1.0)
+        *v = 1.0;
+    }
+  else if (sx * (x - hx) + sy * (y - hy) < 0.0)
+    {
+      *v = 1.0;
+      *s = (((x - vx) * (hx - vx) + (y - vy) * (hy - vy)) /
+            ((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy)));
+
+      if (*s < 0.0)
+        *s = 0.0;
+      else if (*s > 1.0)
+        *s = 1.0;
+    }
+  else
+    {
+      *v = (((x - sx) * (hy - vy) - (y - sy) * (hx - vx))
+            / ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx)));
+
+      if (*v<= 0.0)
+        {
+          *v = 0.0;
+          *s = 0.0;
+        }
+      else
+        {
+          if (*v > 1.0)
+            *v = 1.0;
+
+          if (fabs (hy - vy) < fabs (hx - vx))
+            *s = (x - sx - *v * (vx - sx)) / (*v * (hx - vx));
+          else
+            *s = (y - sy - *v * (vy - sy)) / (*v * (hy - vy));
+
+          if (*s < 0.0)
+            *s = 0.0;
+          else if (*s > 1.0)
+            *s = 1.0;
+        }
+    }
+}
+
+/* Computes whether a point is inside the saturation/value triangle */
+static gboolean
+is_in_triangle (GimpColorWheel *wheel,
+                gdouble         x,
+                gdouble         y)
+{
+  gint    hx, hy, sx, sy, vx, vy;
+  gdouble det, s, v;
+
+  compute_triangle (wheel, &hx, &hy, &sx, &sy, &vx, &vy);
+
+  det = (vx - sx) * (hy - sy) - (vy - sy) * (hx - sx);
+
+  s = ((x - sx) * (hy - sy) - (y - sy) * (hx - sx)) / det;
+  v = ((vx - sx) * (y - sy) - (vy - sy) * (x - sx)) / det;
+
+  return (s >= 0.0 && v >= 0.0 && s + v <= 1.0);
+}
+
+/* Computes a value based on the mouse coordinates */
+static double
+compute_v (GimpColorWheel *wheel,
+           gdouble         x,
+           gdouble         y)
+{
+  GtkAllocation allocation;
+  gdouble       center_x;
+  gdouble       center_y;
+  gdouble       dx, dy;
+  gdouble       angle;
+
+  gtk_widget_get_allocation (GTK_WIDGET (wheel), &allocation);
+
+  center_x = allocation.width / 2.0;
+  center_y = allocation.height / 2.0;
+
+  dx = x - center_x;
+  dy = center_y - y;
+
+  angle = atan2 (dy, dx);
+  if (angle < 0.0)
+    angle += 2.0 * G_PI;
+
+  return angle / (2.0 * G_PI);
+}
+
+static void
+set_cross_grab (GimpColorWheel *wheel,
+                guint32         time)
+{
+  GimpColorWheelPrivate *priv = wheel->priv;
+  GdkCursor             *cursor;
+
+  cursor =
+    gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (wheel)),
+                                GDK_CROSSHAIR);
+
+  gdk_device_grab (gtk_get_current_event_device(),
+		   priv->window,
+		   GDK_OWNERSHIP_NONE,
+		   FALSE,
+		   GDK_POINTER_MOTION_MASK      |
+		   GDK_POINTER_MOTION_HINT_MASK |
+		   GDK_BUTTON_RELEASE_MASK,
+		   cursor, time);
+  g_object_unref (cursor);
+}
+
+static gboolean gimp_color_wheel_grab_broken(GtkWidget *widget, GdkEventGrabBroken *event)
+{
+    (void)event;
+    GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+    GimpColorWheelPrivate *priv  = wheel->priv;
+
+    priv->mode = DRAG_NONE;
+
+    return TRUE;
+}
+
+static gboolean
+gimp_color_wheel_button_press (GtkWidget      *widget,
+                               GdkEventButton *event)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  gdouble                x, y;
+
+  if (priv->mode != DRAG_NONE || event->button != 1)
+    return FALSE;
+
+  x = event->x;
+  y = event->y;
+
+  if (is_in_ring (wheel, x, y))
+    {
+      priv->mode = DRAG_H;
+      set_cross_grab (wheel, event->time);
+
+      gimp_color_wheel_set_color (wheel,
+                                  compute_v (wheel, x, y),
+                                  priv->s,
+                                  priv->v);
+
+      gtk_widget_grab_focus (widget);
+      priv->focus_on_ring = TRUE;
+
+      return TRUE;
+    }
+
+  if (is_in_triangle (wheel, x, y))
+    {
+      gdouble s, v;
+
+      priv->mode = DRAG_SV;
+      set_cross_grab (wheel, event->time);
+
+      compute_sv (wheel, x, y, &s, &v);
+      gimp_color_wheel_set_color (wheel, priv->h, s, v);
+
+      gtk_widget_grab_focus (widget);
+      priv->focus_on_ring = FALSE;
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_color_wheel_button_release (GtkWidget      *widget,
+                                 GdkEventButton *event)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  DragMode               mode;
+  gdouble                x, y;
+
+  if (priv->mode == DRAG_NONE || event->button != 1)
+    return FALSE;
+
+  /* Set the drag mode to DRAG_NONE so that signal handlers for "catched"
+   * can see that this is the final color state.
+   */
+
+  mode = priv->mode;
+  priv->mode = DRAG_NONE;
+
+  x = event->x;
+  y = event->y;
+
+  if (mode == DRAG_H)
+    {
+      gimp_color_wheel_set_color (wheel,
+                                  compute_v (wheel, x, y), priv->s, priv->v);
+    }
+  else if (mode == DRAG_SV)
+    {
+      gdouble s, v;
+
+      compute_sv (wheel, x, y, &s, &v);
+      gimp_color_wheel_set_color (wheel, priv->h, s, v);
+    }
+  else
+    g_assert_not_reached ();
+
+  gdk_device_ungrab (gtk_get_current_event_device(),
+                     event->time);
+
+  return TRUE;
+}
+
+static gboolean
+gimp_color_wheel_motion (GtkWidget      *widget,
+                         GdkEventMotion *event)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  gdouble                x, y;
+
+  if (priv->mode == DRAG_NONE)
+    return FALSE;
+
+  gdk_event_request_motions (event);
+  x = event->x;
+  y = event->y;
+
+  if (priv->mode == DRAG_H)
+    {
+      gimp_color_wheel_set_color (wheel,
+                                  compute_v (wheel, x, y), priv->s, priv->v);
+      return TRUE;
+    }
+  else if (priv->mode == DRAG_SV)
+    {
+      gdouble s, v;
+
+      compute_sv (wheel, x, y, &s, &v);
+      gimp_color_wheel_set_color (wheel, priv->h, s, v);
+      return TRUE;
+    }
+
+  g_assert_not_reached ();
+
+  return FALSE;
+}
+
+
+/* Redrawing */
+
+/* Paints the hue ring */
+static void
+paint_ring (GimpColorWheel *wheel,
+            cairo_t        *cr)
+{
+  GtkWidget             *widget = GTK_WIDGET (wheel);
+  GimpColorWheelPrivate *priv   = wheel->priv;
+  gint                   width, height;
+  gint                   xx, yy;
+  gdouble                dx, dy, dist;
+  gdouble                center_x;
+  gdouble                center_y;
+  gdouble                inner, outer;
+  guint32               *buf, *p;
+  gdouble                angle;
+  gdouble                hue;
+  gdouble                r, g, b;
+  cairo_surface_t       *source;
+  cairo_t               *source_cr;
+  gint                   stride;
+
+  width  = gtk_widget_get_allocated_width  (widget);
+  height = gtk_widget_get_allocated_height (widget);
+
+  center_x = width  / 2.0;
+  center_y = height / 2.0;
+
+  outer = priv->size / 2.0;
+  inner = outer - priv->ring_width;
+
+  /* Create an image initialized with the ring colors */
+
+  stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
+  buf = g_new (guint32, height * stride / 4);
+
+  for (yy = 0; yy < height; yy++)
+    {
+      p = buf + yy * width;
+      dy = -(yy - center_y);
+
+      for (xx = 0; xx < width; xx++)
+        {
+          dx = xx - center_x;
+
+          dist = dx * dx + dy * dy;
+          if (dist < ((inner-1) * (inner-1)) || dist > ((outer+1) * (outer+1)))
+            {
+              *p++ = 0;
+              continue;
+            }
+
+          angle = atan2 (dy, dx);
+          if (angle < 0.0)
+            angle += 2.0 * G_PI;
+
+          hue = angle / (2.0 * G_PI);
+
+          r = hue;
+          g = 1.0;
+          b = 1.0;
+          hsv_to_rgb (&r, &g, &b);
+
+          *p++ = (((int)floor (r * 255 + 0.5) << 16) |
+                  ((int)floor (g * 255 + 0.5) << 8) |
+                  (int)floor (b * 255 + 0.5));
+        }
+    }
+
+  source = cairo_image_surface_create_for_data ((unsigned char *)buf,
+                                                CAIRO_FORMAT_RGB24,
+                                                width, height, stride);
+
+  /* Now draw the value marker onto the source image, so that it
+   * will get properly clipped at the edges of the ring
+   */
+  source_cr = cairo_create (source);
+
+  r = priv->h;
+  g = 1.0;
+  b = 1.0;
+  hsv_to_rgb (&r, &g, &b);
+
+  if (INTENSITY (r, g, b) > 0.5)
+    cairo_set_source_rgb (source_cr, 0.0, 0.0, 0.0);
+  else
+    cairo_set_source_rgb (source_cr, 1.0, 1.0, 1.0);
+
+  cairo_move_to (source_cr, center_x, center_y);
+  cairo_line_to (source_cr,
+                 center_x + cos (priv->h * 2.0 * G_PI) * priv->size / 2,
+                 center_y - sin (priv->h * 2.0 * G_PI) * priv->size / 2);
+  cairo_stroke (source_cr);
+  cairo_destroy (source_cr);
+
+  /* Draw the ring using the source image */
+
+  cairo_save (cr);
+
+  cairo_set_source_surface (cr, source, 0, 0);
+  cairo_surface_destroy (source);
+
+  cairo_set_line_width (cr, priv->ring_width);
+  cairo_new_path (cr);
+  cairo_arc (cr,
+             center_x, center_y,
+             priv->size / 2.0 - priv->ring_width / 2.0,
+             0, 2 * G_PI);
+  cairo_stroke (cr);
+
+  cairo_restore (cr);
+
+  g_free (buf);
+}
+
+/* Converts an HSV triplet to an integer RGB triplet */
+static void
+get_color (gdouble  h,
+           gdouble  s,
+           gdouble  v,
+           gint    *r,
+           gint    *g,
+           gint    *b)
+{
+  hsv_to_rgb (&h, &s, &v);
+
+  *r = floor (h * 255 + 0.5);
+  *g = floor (s * 255 + 0.5);
+  *b = floor (v * 255 + 0.5);
+}
+
+#define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t))
+
+#define LERP(a, b, v1, v2, i) (((v2) - (v1) != 0)                                       \
+                               ? ((a) + ((b) - (a)) * ((i) - (v1)) / ((v2) - (v1)))     \
+                               : (a))
+
+/* Number of pixels we extend out from the edges when creating
+ * color source to avoid artifacts
+ */
+#define PAD 3
+
+/* Paints the HSV triangle */
+static void
+paint_triangle (GimpColorWheel *wheel,
+                cairo_t        *cr,
+                gboolean        draw_focus)
+{
+  GtkWidget             *widget = GTK_WIDGET (wheel);
+  GimpColorWheelPrivate *priv   = wheel->priv;
+  gint                   hx, hy, sx, sy, vx, vy; /* HSV vertices */
+  gint                   x1, y1, r1, g1, b1; /* First vertex in scanline order */
+  gint                   x2, y2, r2, g2, b2; /* Second vertex */
+  gint                   x3, y3, r3, g3, b3; /* Third vertex */
+  gint                   t;
+  guint32               *buf, *p, c;
+  gint                   xl, xr, rl, rr, gl, gr, bl, br; /* Scanline data */
+  gint                   xx, yy;
+  gint                   x_interp, y_interp;
+  gint                   x_start, x_end;
+  cairo_surface_t       *source;
+  gdouble                r, g, b;
+  gint                   stride;
+  gint                   width, height;
+  GtkStyleContext       *context;
+
+  width  = gtk_widget_get_allocated_width  (widget);
+  height = gtk_widget_get_allocated_height (widget);
+
+  /* Compute triangle's vertices */
+
+  compute_triangle (wheel, &hx, &hy, &sx, &sy, &vx, &vy);
+
+  x1 = hx;
+  y1 = hy;
+  get_color (priv->h, 1.0, 1.0, &r1, &g1, &b1);
+
+  x2 = sx;
+  y2 = sy;
+  get_color (priv->h, 1.0, 0.0, &r2, &g2, &b2);
+
+  x3 = vx;
+  y3 = vy;
+  get_color (priv->h, 0.0, 1.0, &r3, &g3, &b3);
+
+  if (y2 > y3)
+    {
+      SWAP (x2, x3, t);
+      SWAP (y2, y3, t);
+      SWAP (r2, r3, t);
+      SWAP (g2, g3, t);
+      SWAP (b2, b3, t);
+    }
+
+  if (y1 > y3)
+    {
+      SWAP (x1, x3, t);
+      SWAP (y1, y3, t);
+      SWAP (r1, r3, t);
+      SWAP (g1, g3, t);
+      SWAP (b1, b3, t);
+    }
+
+  if (y1 > y2)
+    {
+      SWAP (x1, x2, t);
+      SWAP (y1, y2, t);
+      SWAP (r1, r2, t);
+      SWAP (g1, g2, t);
+      SWAP (b1, b2, t);
+    }
+
+  /* Shade the triangle */
+
+  stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
+  buf = g_new (guint32, height * stride / 4);
+
+  for (yy = 0; yy < height; yy++)
+    {
+      p = buf + yy * width;
+
+      if (yy >= y1 - PAD && yy < y3 + PAD)
+        {
+          y_interp = CLAMP (yy, y1, y3);
+
+          if (y_interp < y2)
+            {
+              xl = LERP (x1, x2, y1, y2, y_interp);
+
+              rl = LERP (r1, r2, y1, y2, y_interp);
+              gl = LERP (g1, g2, y1, y2, y_interp);
+              bl = LERP (b1, b2, y1, y2, y_interp);
+            }
+          else
+            {
+              xl = LERP (x2, x3, y2, y3, y_interp);
+
+              rl = LERP (r2, r3, y2, y3, y_interp);
+              gl = LERP (g2, g3, y2, y3, y_interp);
+              bl = LERP (b2, b3, y2, y3, y_interp);
+            }
+
+          xr = LERP (x1, x3, y1, y3, y_interp);
+
+          rr = LERP (r1, r3, y1, y3, y_interp);
+          gr = LERP (g1, g3, y1, y3, y_interp);
+          br = LERP (b1, b3, y1, y3, y_interp);
+
+          if (xl > xr)
+            {
+              SWAP (xl, xr, t);
+              SWAP (rl, rr, t);
+              SWAP (gl, gr, t);
+              SWAP (bl, br, t);
+            }
+
+          x_start = MAX (xl - PAD, 0);
+          x_end = MIN (xr + PAD, width);
+          x_start = MIN (x_start, x_end);
+
+          c = (rl << 16) | (gl << 8) | bl;
+
+          for (xx = 0; xx < x_start; xx++)
+            *p++ = c;
+
+          for (; xx < x_end; xx++)
+            {
+              x_interp = CLAMP (xx, xl, xr);
+
+              *p++ = ((LERP (rl, rr, xl, xr, x_interp) << 16) |
+                      (LERP (gl, gr, xl, xr, x_interp) << 8) |
+                      LERP (bl, br, xl, xr, x_interp));
+            }
+
+          c = (rr << 16) | (gr << 8) | br;
+
+          for (; xx < width; xx++)
+            *p++ = c;
+        }
+    }
+
+  source = cairo_image_surface_create_for_data ((unsigned char *)buf,
+                                                CAIRO_FORMAT_RGB24,
+                                                width, height, stride);
+
+  /* Draw a triangle with the image as a source */
+
+  cairo_set_source_surface (cr, source, 0, 0);
+  cairo_surface_destroy (source);
+
+  cairo_move_to (cr, x1, y1);
+  cairo_line_to (cr, x2, y2);
+  cairo_line_to (cr, x3, y3);
+  cairo_close_path (cr);
+  cairo_fill (cr);
+
+  g_free (buf);
+
+  /* Draw value marker */
+
+  xx = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5);
+  yy = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5);
+
+  r = priv->h;
+  g = priv->s;
+  b = priv->v;
+  hsv_to_rgb (&r, &g, &b);
+
+  context = gtk_widget_get_style_context (widget);
+
+  gtk_style_context_save (context);
+
+  if (INTENSITY (r, g, b) > 0.5)
+    {
+      gtk_style_context_add_class (context, "light-area-focus");
+      cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+    }
+  else
+    {
+      gtk_style_context_add_class (context, "dark-area-focus");
+      cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+    }
+
+#define RADIUS 4
+#define FOCUS_RADIUS 6
+
+  cairo_new_path (cr);
+  cairo_arc (cr, xx, yy, RADIUS, 0, 2 * G_PI);
+  cairo_stroke (cr);
+
+  /* Draw focus outline */
+
+  if (draw_focus && ! priv->focus_on_ring)
+    {
+      gint focus_width;
+      gint focus_pad;
+
+      gtk_widget_style_get (widget,
+                            "focus-line-width", &focus_width,
+                            "focus-padding",    &focus_pad,
+                            NULL);
+
+      gtk_render_focus (context, cr,
+                        xx - FOCUS_RADIUS - focus_width - focus_pad,
+                        yy - FOCUS_RADIUS - focus_width - focus_pad,
+                        2 * (FOCUS_RADIUS + focus_width + focus_pad),
+                        2 * (FOCUS_RADIUS + focus_width + focus_pad));
+    }
+
+  gtk_style_context_restore (context);
+}
+
+static gboolean
+gimp_color_wheel_draw (GtkWidget *widget,
+                       cairo_t   *cr)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+  gboolean               draw_focus;
+
+  draw_focus = gtk_widget_has_visible_focus (widget);
+
+  paint_ring (wheel, cr);
+  paint_triangle (wheel, cr, draw_focus);
+
+  if (draw_focus && priv->focus_on_ring)
+    {
+      GtkStyleContext *context = gtk_widget_get_style_context (widget);
+
+      gtk_render_focus (context, cr, 0, 0,
+                        gtk_widget_get_allocated_width (widget),
+                        gtk_widget_get_allocated_height (widget));
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_color_wheel_focus (GtkWidget        *widget,
+                        GtkDirectionType  dir)
+{
+  GimpColorWheel        *wheel = GIMP_COLOR_WHEEL (widget);
+  GimpColorWheelPrivate *priv  = wheel->priv;
+
+  if (!gtk_widget_has_focus (widget))
+    {
+      if (dir == GTK_DIR_TAB_BACKWARD)
+        priv->focus_on_ring = FALSE;
+      else
+        priv->focus_on_ring = TRUE;
+
+      gtk_widget_grab_focus (widget);
+      return TRUE;
+    }
+
+  switch (dir)
+    {
+    case GTK_DIR_UP:
+      if (priv->focus_on_ring)
+        return FALSE;
+      else
+        priv->focus_on_ring = TRUE;
+      break;
+
+    case GTK_DIR_DOWN:
+      if (priv->focus_on_ring)
+        priv->focus_on_ring = FALSE;
+      else
+        return FALSE;
+      break;
+
+    case GTK_DIR_LEFT:
+    case GTK_DIR_TAB_BACKWARD:
+      if (priv->focus_on_ring)
+        return FALSE;
+      else
+        priv->focus_on_ring = TRUE;
+      break;
+
+    case GTK_DIR_RIGHT:
+    case GTK_DIR_TAB_FORWARD:
+      if (priv->focus_on_ring)
+        priv->focus_on_ring = FALSE;
+      else
+        return FALSE;
+      break;
+    }
+
+  gtk_widget_queue_draw (widget);
+
+  return TRUE;
+}
+
+/**
+ * gimp_color_wheel_new:
+ *
+ * Creates a new HSV color selector.
+ *
+ * Return value: A newly-created HSV color selector.
+ *
+ * Since: 2.14
+ */
+GtkWidget*
+gimp_color_wheel_new (void)
+{
+  return g_object_new (GIMP_TYPE_COLOR_WHEEL, NULL);
+}
+
+/**
+ * gimp_color_wheel_set_color:
+ * @hsv: An HSV color selector
+ * @h: Hue
+ * @s: Saturation
+ * @v: Value
+ *
+ * Sets the current color in an HSV color selector.
+ * Color component values must be in the [0.0, 1.0] range.
+ *
+ * Since: 2.14
+ */
+void
+gimp_color_wheel_set_color (GimpColorWheel *wheel,
+                            gdouble         h,
+                            gdouble         s,
+                            gdouble         v)
+{
+  GimpColorWheelPrivate *priv;
+
+  g_return_if_fail (GIMP_IS_COLOR_WHEEL (wheel));
+  g_return_if_fail (h >= 0.0 && h <= 1.0);
+  g_return_if_fail (s >= 0.0 && s <= 1.0);
+  g_return_if_fail (v >= 0.0 && v <= 1.0);
+
+  priv = wheel->priv;
+
+  if(h == 0.0 && s == 0.0) {
+    h = priv->h;
+  }
+
+  priv->h = h;
+  priv->s = s;
+  priv->v = v;
+
+  g_signal_emit (wheel, wheel_signals[CHANGED], 0);
+
+  gtk_widget_queue_draw (GTK_WIDGET (wheel));
+}
+
+/**
+ * gimp_color_wheel_get_color:
+ * @hsv: An HSV color selector
+ * @h: (out): Return value for the hue
+ * @s: (out): Return value for the saturation
+ * @v: (out): Return value for the value
+ *
+ * Queries the current color in an HSV color selector.
+ * Returned values will be in the [0.0, 1.0] range.
+ *
+ * Since: 2.14
+ */
+void
+gimp_color_wheel_get_color (GimpColorWheel *wheel,
+                            gdouble        *h,
+                            gdouble        *s,
+                            gdouble        *v)
+{
+  GimpColorWheelPrivate *priv;
+
+  g_return_if_fail (GIMP_IS_COLOR_WHEEL (wheel));
+
+  priv = wheel->priv;
+
+  if (h) *h = priv->h;
+  if (s) *s = priv->s;
+  if (v) *v = priv->v;
+}
+
+/**
+ * gimp_color_wheel_set_ring_fraction:
+ * @ring: A wheel color selector
+ * @fraction: Ring fraction
+ *
+ * Sets the ring fraction of a wheel color selector.
+ *
+ * Since: GIMP 2.10
+ */
+void
+gimp_color_wheel_set_ring_fraction (GimpColorWheel *hsv,
+                                    gdouble         fraction)
+{
+  GimpColorWheelPrivate *priv;
+
+  g_return_if_fail (GIMP_IS_COLOR_WHEEL (hsv));
+
+  priv = hsv->priv;
+
+  priv->ring_fraction = CLAMP (fraction, 0.01, 0.99);
+
+  gtk_widget_queue_draw (GTK_WIDGET (hsv));
+}
+
+/**
+ * gimp_color_wheel_get_ring_fraction:
+ * @ring: A wheel color selector
+ *
+ * Returns value: The ring fraction of the wheel color selector.
+ *
+ * Since: GIMP 2.10
+ */
+gdouble
+gimp_color_wheel_get_ring_fraction (GimpColorWheel *wheel)
+{
+  GimpColorWheelPrivate *priv;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_WHEEL (wheel), DEFAULT_FRACTION);
+
+  priv = wheel->priv;
+
+  return priv->ring_fraction;
+}
+
+/**
+ * gimp_color_wheel_is_adjusting:
+ * @hsv: A #GimpColorWheel
+ *
+ * An HSV color selector can be said to be adjusting if multiple rapid
+ * changes are being made to its value, for example, when the user is
+ * adjusting the value with the mouse. This function queries whether
+ * the HSV color selector is being adjusted or not.
+ *
+ * Return value: %TRUE if clients can ignore changes to the color value,
+ *     since they may be transitory, or %FALSE if they should consider
+ *     the color value status to be final.
+ *
+ * Since: 2.14
+ */
+gboolean
+gimp_color_wheel_is_adjusting (GimpColorWheel *wheel)
+{
+  GimpColorWheelPrivate *priv;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_WHEEL (wheel), FALSE);
+
+  priv = wheel->priv;
+
+  return priv->mode != DRAG_NONE;
+}
+
+static void
+gimp_color_wheel_move (GimpColorWheel   *wheel,
+                       GtkDirectionType  dir)
+{
+  GimpColorWheelPrivate *priv = wheel->priv;
+  gdouble                hue, sat, val;
+  gint                   hx, hy, sx, sy, vx, vy; /* HSV vertices */
+  gint                   x, y; /* position in triangle */
+
+  hue = priv->h;
+  sat = priv->s;
+  val = priv->v;
+
+  compute_triangle (wheel, &hx, &hy, &sx, &sy, &vx, &vy);
+
+  x = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5);
+  y = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5);
+
+#define HUE_DELTA 0.002
+  switch (dir)
+    {
+    case GTK_DIR_UP:
+      if (priv->focus_on_ring)
+        hue += HUE_DELTA;
+      else
+        {
+          y -= 1;
+          compute_sv (wheel, x, y, &sat, &val);
+        }
+      break;
+
+    case GTK_DIR_DOWN:
+      if (priv->focus_on_ring)
+        hue -= HUE_DELTA;
+      else
+        {
+          y += 1;
+          compute_sv (wheel, x, y, &sat, &val);
+        }
+      break;
+
+    case GTK_DIR_LEFT:
+      if (priv->focus_on_ring)
+        hue += HUE_DELTA;
+      else
+        {
+          x -= 1;
+          compute_sv (wheel, x, y, &sat, &val);
+        }
+      break;
+
+    case GTK_DIR_RIGHT:
+      if (priv->focus_on_ring)
+        hue -= HUE_DELTA
+          ;
+      else
+        {
+          x += 1;
+          compute_sv (wheel, x, y, &sat, &val);
+        }
+      break;
+
+    default:
+      /* we don't care about the tab directions */
+      break;
+    }
+
+  /* Wrap */
+  if (hue < 0.0)
+    hue = 1.0;
+  else if (hue > 1.0)
+    hue = 0.0;
+
+  gimp_color_wheel_set_color (wheel, hue, sat, val);
+}
diff --git a/src/widgets/gimp/gimpcolorwheel.h b/src/widgets/gimp/gimpcolorwheel.h
new file mode 100644
index 000000000..016fb593f
--- /dev/null
+++ b/src/widgets/gimp/gimpcolorwheel.h
@@ -0,0 +1,95 @@
+/* HSV color selector for GTK+
+ *
+ * Copyright (C) 1999 The Free Software Foundation
+ *
+ * Authors: Simon Budig <Simon.Budig@unix-ag.org> (original code)
+ *          Federico Mena-Quintero <federico@gimp.org> (cleanup for GTK+)
+ *          Jonathan Blandford <jrb@redhat.com> (cleanup for GTK+)
+ *
+ * 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 1997-2000.  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 __GIMP_COLOR_WHEEL_H__
+#define __GIMP_COLOR_WHEEL_H__
+
+G_BEGIN_DECLS
+
+#define GIMP_TYPE_COLOR_WHEEL            (gimp_color_wheel_get_type ())
+#define GIMP_COLOR_WHEEL(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_COLOR_WHEEL, GimpColorWheel))
+#define GIMP_COLOR_WHEEL_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_WHEEL, GimpColorWheelClass))
+#define GIMP_IS_COLOR_WHEEL(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_COLOR_WHEEL))
+#define GIMP_IS_COLOR_WHEEL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_WHEEL))
+#define GIMP_COLOR_WHEEL_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_WHEEL, GimpColorWheelClass))
+
+
+typedef struct _GimpColorWheel      GimpColorWheel;
+typedef struct _GimpColorWheelClass GimpColorWheelClass;
+
+struct _GimpColorWheel
+{
+  GtkWidget parent_instance;
+
+  /* Private data */
+  gpointer priv;
+};
+
+struct _GimpColorWheelClass
+{
+  GtkWidgetClass parent_class;
+
+  /* Notification signals */
+  void (* changed) (GimpColorWheel   *wheel);
+
+  /* Keybindings */
+  void (* move)    (GimpColorWheel   *wheel,
+                    GtkDirectionType  type);
+
+  /* Padding for future expansion */
+  void (*_gimp_reserved1) (void);
+  void (*_gimp_reserved2) (void);
+  void (*_gimp_reserved3) (void);
+  void (*_gimp_reserved4) (void);
+};
+
+
+GType       gimp_color_wheel_get_type          (void) G_GNUC_CONST;
+GtkWidget * gimp_color_wheel_new               (void);
+
+void        gimp_color_wheel_set_color         (GimpColorWheel *wheel,
+                                                double          h,
+                                                double          s,
+                                                double          v);
+void        gimp_color_wheel_get_color         (GimpColorWheel *wheel,
+                                                gdouble        *h,
+                                                gdouble        *s,
+                                                gdouble        *v);
+
+void        gimp_color_wheel_set_ring_fraction (GimpColorWheel *wheel,
+                                                gdouble         fraction);
+gdouble     gimp_color_wheel_get_ring_fraction (GimpColorWheel *wheel);
+
+gboolean    gimp_color_wheel_is_adjusting      (GimpColorWheel *wheel);
+
+G_END_DECLS
+
+#endif /* __GIMP_COLOR_WHEEL_H__ */
diff --git a/src/widgets/gimp/gimpspinscale.c b/src/widgets/gimp/gimpspinscale.c
new file mode 100644
index 000000000..8d8c6c935
--- /dev/null
+++ b/src/widgets/gimp/gimpspinscale.c
@@ -0,0 +1,969 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpspinscale.c
+ * Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
+ *               2012 Øyvind Kolås    <pippin@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <math.h>
+#include <string.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "gimpspinscale.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_LABEL,
+  PROP_FOCUS_WIDGET
+};
+
+typedef enum
+{
+  TARGET_NUMBER,
+  TARGET_UPPER,
+  TARGET_LOWER,
+  TARGET_NONE
+} SpinScaleTarget;
+
+typedef enum
+{
+  APPEARANCE_FULL = 1,  /* Full size suitable for tablets */
+  APPEARANCE_COMPACT, /* Compact, suitable for desktops with mouse control */
+} SpinScaleAppearance;
+
+typedef struct _GimpSpinScalePrivate GimpSpinScalePrivate;
+
+struct _GimpSpinScalePrivate
+{
+  gchar       *label;
+
+  gboolean     scale_limits_set;
+  gdouble      scale_lower;
+  gdouble      scale_upper;
+  gdouble      gamma;
+
+  PangoLayout *layout;
+  gboolean     changing_value;
+  gboolean     relative_change;
+  gdouble      start_x;
+  gdouble      start_value;
+
+  GtkWidget*   focusWidget;
+  gboolean     transferFocus;
+  SpinScaleAppearance appearanceMode;
+};
+
+#define GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
+                                                       GIMP_TYPE_SPIN_SCALE, \
+                                                       GimpSpinScalePrivate))
+
+
+static void       gimp_spin_scale_dispose        (GObject          *object);
+static void       gimp_spin_scale_finalize       (GObject          *object);
+static void       gimp_spin_scale_set_property   (GObject          *object,
+                                                  guint             property_id,
+                                                  const GValue     *value,
+                                                  GParamSpec       *pspec);
+static void       gimp_spin_scale_get_property   (GObject          *object,
+                                                  guint             property_id,
+                                                  GValue           *value,
+                                                  GParamSpec       *pspec);
+
+static void       gimp_spin_scale_style_set      (GtkWidget        *widget,
+                                                  GtkStyle         *prev_style);
+
+static void       gimp_spin_scale_get_preferred_width  (GtkWidget        *widget,
+                                                        gint             *minimum_width,
+                                                        gint             *natural_width);
+static void       gimp_spin_scale_get_preferred_height (GtkWidget        *widget,
+                                                        gint             *minimum_width,
+                                                        gint             *natural_width);
+static gboolean   gimp_spin_scale_draw (GtkWidget *widget,
+                                              cairo_t   *cr);
+
+static gboolean   gimp_spin_scale_button_press   (GtkWidget        *widget,
+                                                  GdkEventButton   *event);
+static gboolean   gimp_spin_scale_button_release (GtkWidget        *widget,
+                                                  GdkEventButton   *event);
+static gboolean   gimp_spin_scale_motion_notify  (GtkWidget        *widget,
+                                                  GdkEventMotion   *event);
+static gboolean   gimp_spin_scale_leave_notify   (GtkWidget        *widget,
+                                                  GdkEventCrossing *event);
+static gboolean   gimp_spin_scale_keypress( GtkWidget *widget,
+                                                GdkEventKey *event);
+
+static void       gimp_spin_scale_defocus( GtkSpinButton *spin_button );
+
+static void       gimp_spin_scale_value_changed  (GtkSpinButton    *spin_button);
+
+
+G_DEFINE_TYPE (GimpSpinScale, gimp_spin_scale, GTK_TYPE_SPIN_BUTTON);
+
+#define parent_class gimp_spin_scale_parent_class
+
+
+static void
+gimp_spin_scale_class_init (GimpSpinScaleClass *klass)
+{
+  GObjectClass       *object_class      = G_OBJECT_CLASS (klass);
+  GtkWidgetClass     *widget_class      = GTK_WIDGET_CLASS (klass);
+  GtkSpinButtonClass *spin_button_class = GTK_SPIN_BUTTON_CLASS (klass);
+
+  object_class->dispose              = gimp_spin_scale_dispose;
+  object_class->finalize             = gimp_spin_scale_finalize;
+  object_class->set_property         = gimp_spin_scale_set_property;
+  object_class->get_property         = gimp_spin_scale_get_property;
+
+  widget_class->style_set            = gimp_spin_scale_style_set;
+  widget_class->get_preferred_width  = gimp_spin_scale_get_preferred_width;
+  widget_class->get_preferred_height = gimp_spin_scale_get_preferred_height;
+  widget_class->draw                 = gimp_spin_scale_draw;
+  widget_class->button_press_event   = gimp_spin_scale_button_press;
+  widget_class->button_release_event = gimp_spin_scale_button_release;
+  widget_class->motion_notify_event  = gimp_spin_scale_motion_notify;
+  widget_class->leave_notify_event   = gimp_spin_scale_leave_notify;
+  widget_class->key_press_event      = gimp_spin_scale_keypress;
+
+  spin_button_class->value_changed   = gimp_spin_scale_value_changed;
+
+  g_object_class_install_property (object_class, PROP_LABEL,
+                                   g_param_spec_string ("label", NULL, NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  g_type_class_add_private (klass, sizeof (GimpSpinScalePrivate));
+}
+
+static void
+gimp_spin_scale_init (GimpSpinScale *scale)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (scale);
+
+  gtk_widget_add_events (GTK_WIDGET (scale),
+                         GDK_BUTTON_PRESS_MASK   |
+                         GDK_BUTTON_RELEASE_MASK |
+                         GDK_POINTER_MOTION_MASK |
+                         GDK_BUTTON1_MOTION_MASK |
+                         GDK_LEAVE_NOTIFY_MASK);
+
+  gtk_entry_set_alignment (GTK_ENTRY (scale), 1.0);
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (scale), TRUE);
+
+  private->gamma = 1.0;
+  private->focusWidget = NULL;
+  private->transferFocus = FALSE;
+  private->appearanceMode = APPEARANCE_COMPACT;
+}
+
+static void
+gimp_spin_scale_dispose (GObject *object)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (object);
+
+  if (private->layout)
+    {
+      g_object_unref (private->layout);
+      private->layout = NULL;
+    }
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_spin_scale_finalize (GObject *object)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (object);
+
+  if (private->label)
+    {
+      g_free (private->label);
+      private->label = NULL;
+    }
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_spin_scale_set_property (GObject      *object,
+                              guint         property_id,
+                              const GValue *value,
+                              GParamSpec   *pspec)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (object);
+  GimpSpinScale        *scale   = GIMP_SPIN_SCALE (object);
+
+  switch (property_id)
+    {
+    case PROP_LABEL:
+      gimp_spin_scale_set_label (scale, g_value_get_string (value));
+      break;
+
+    case PROP_FOCUS_WIDGET:
+      {
+        /* TODO unhook prior */
+        private->focusWidget = GTK_WIDGET (g_value_get_pointer (value));
+      }
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_spin_scale_get_property (GObject    *object,
+                              guint       property_id,
+                              GValue     *value,
+                              GParamSpec *pspec)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (object);
+  GimpSpinScale        *scale   = GIMP_SPIN_SCALE (object);
+
+  switch (property_id)
+    {
+    case PROP_LABEL:
+      g_value_set_string (value, gimp_spin_scale_get_label (scale));
+      break;
+
+    case PROP_FOCUS_WIDGET:
+      g_value_set_pointer (value, private->focusWidget);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+
+void
+gimp_spin_scale_set_focuswidget( GtkWidget *scale, GtkWidget* widget )
+{
+    GimpSpinScalePrivate *private = GET_PRIVATE (scale);
+
+    /* TODO unhook prior */
+
+    private->focusWidget = widget;
+}
+
+void
+gimp_spin_scale_set_appearance( GtkWidget *widget, const gchar *appearance)
+{
+    GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+
+    if ( strcmp("full", appearance) == 0 ) {
+        private->appearanceMode = APPEARANCE_FULL;
+    } else if ( strcmp("compact", appearance) == 0 ) {
+        private->appearanceMode = APPEARANCE_COMPACT;
+    }
+}
+
+static void
+gimp_spin_scale_get_preferred_width (GtkWidget *widget,
+                                     gint      *minimum_width,
+                                     gint      *natural_width)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+  PangoContext         *context = gtk_widget_get_pango_context (widget);
+  PangoFontMetrics     *metrics;
+
+  GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget,
+                                                        minimum_width,
+                                                        natural_width);
+
+  metrics = pango_context_get_metrics (context,
+                                       pango_context_get_font_description (context),
+                                       pango_context_get_language (context));
+
+  if (private->label)
+    {
+      gint char_width;
+      gint digit_width;
+      gint char_pixels;
+
+      char_width = pango_font_metrics_get_approximate_char_width (metrics);
+      digit_width = pango_font_metrics_get_approximate_digit_width (metrics);
+      char_pixels = PANGO_PIXELS (MAX (char_width, digit_width));
+
+      /* ~3 chars for the ellipse */
+      *minimum_width += char_pixels * 3;
+      *natural_width += char_pixels * 3;
+    }
+
+  pango_font_metrics_unref (metrics);
+}
+
+static void
+gimp_spin_scale_get_preferred_height (GtkWidget *widget,
+                                      gint      *minimum_height,
+                                      gint      *natural_height)
+{
+  PangoContext     *context = gtk_widget_get_pango_context (widget);
+  PangoFontMetrics *metrics;
+  //gint              height;
+
+  GTK_WIDGET_CLASS (parent_class)->get_preferred_height (widget,
+                                                         minimum_height,
+                                                         natural_height);
+
+  metrics = pango_context_get_metrics (context,
+                                       pango_context_get_font_description (context),
+                                       pango_context_get_language (context));
+
+  //height = PANGO_PIXELS (pango_font_metrics_get_ascent (metrics) +
+  //                       pango_font_metrics_get_descent (metrics));
+
+  *minimum_height += 1;
+  *natural_height += 1;
+
+  pango_font_metrics_unref (metrics);
+}
+
+static void
+gimp_spin_scale_style_set (GtkWidget *widget,
+                           GtkStyle  *prev_style)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
+
+  if (private->layout)
+    {
+      g_object_unref (private->layout);
+      private->layout = NULL;
+    }
+}
+
+
+static gboolean
+    gimp_spin_scale_draw (GtkWidget *widget,
+                          cairo_t   *cr)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+  GtkStyleContext      *style   = gtk_widget_get_style_context(widget);
+  GtkAllocation         allocation;
+  GdkRGBA               color;
+
+  cairo_save (cr);
+  GTK_WIDGET_CLASS (parent_class)->draw (widget, cr);
+  cairo_restore (cr);
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  cairo_set_line_width (cr, 1.0);
+
+  if (private->label)
+    {
+      GdkRectangle   text_area;
+      gint           minimum_width;
+      gint           natural_width;
+      PangoRectangle logical;
+      gint           layout_offset_x;
+      gint           layout_offset_y;
+      GtkStateFlags  state;
+      GdkRGBA        text_color;
+      GdkRGBA        bar_text_color;
+      gdouble        progress_fraction;
+      gint           progress_x;
+      gint           progress_y;
+      gint           progress_width;
+      gint           progress_height;
+
+      gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area);
+
+      GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget,
+                                                            &minimum_width,
+                                                            &natural_width);
+
+      if (! private->layout)
+        {
+          private->layout = gtk_widget_create_pango_layout (widget,
+                                                            private->label);
+          pango_layout_set_ellipsize (private->layout, PANGO_ELLIPSIZE_END);
+        }
+
+      pango_layout_set_width (private->layout,
+                              PANGO_SCALE *
+                              (allocation.width - minimum_width));
+      pango_layout_get_pixel_extents (private->layout, NULL, &logical);
+
+      gtk_entry_get_layout_offsets (GTK_ENTRY (widget), NULL, &layout_offset_y);
+
+      if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+          layout_offset_x = text_area.x + text_area.width - logical.width - 4;
+      else
+        layout_offset_x = 4;
+
+      layout_offset_x -= logical.x;
+
+      state = gtk_widget_get_state_flags (widget);
+
+      gtk_style_context_get_color (style, state, &text_color);
+
+      gtk_style_context_save (style);
+      gtk_style_context_add_class (style, GTK_STYLE_CLASS_PROGRESSBAR);
+      gtk_style_context_get_color (style, state, &bar_text_color);
+      gtk_style_context_restore (style);
+
+      progress_fraction = gtk_entry_get_progress_fraction (GTK_ENTRY (widget));
+
+      if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+        {
+          progress_fraction = 1.0 - progress_fraction;
+
+          progress_x      = text_area.width * progress_fraction;
+          progress_y      = 0;
+          progress_width  = text_area.width - progress_x;
+          progress_height = text_area.height;
+        }
+      else
+        {
+          progress_x      = 0;
+          progress_y      = 0;
+          progress_width  = text_area.width * progress_fraction;
+          progress_height = text_area.height;
+        }
+
+      cairo_save (cr);
+
+      cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+      cairo_rectangle (cr, 0, 0, text_area.width, text_area.height);
+      cairo_rectangle (cr, progress_x, progress_y,
+                       progress_width, progress_height);
+      cairo_clip (cr);
+      cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
+
+      cairo_move_to (cr, layout_offset_x, text_area.y + layout_offset_y-3);
+      gdk_cairo_set_source_rgba (cr, &text_color);
+      pango_cairo_show_layout (cr, private->layout);
+      cairo_restore (cr);
+
+      cairo_rectangle (cr, progress_x, progress_y,
+                       progress_width, progress_height);
+      cairo_clip (cr);
+
+      cairo_move_to (cr, layout_offset_x, text_area.y + layout_offset_y-3);
+      gdk_cairo_set_source_rgba (cr, &bar_text_color);
+      pango_cairo_show_layout (cr, private->layout);
+    }
+
+  return FALSE;
+}
+
+/* Returns TRUE if a translation should be done */
+static gboolean
+gtk_widget_get_translation_to_window (GtkWidget *widget,
+                                      GdkWindow *window,
+                                      int       *x,
+                                      int       *y)
+{
+  GdkWindow *w, *widget_window;
+
+  if (!gtk_widget_get_has_window (widget))
+    {
+      GtkAllocation allocation;
+
+      gtk_widget_get_allocation (widget, &allocation);
+
+      *x = -allocation.x;
+      *y = -allocation.y;
+    }
+  else
+    {
+      *x = 0;
+      *y = 0;
+    }
+
+  widget_window = gtk_widget_get_window (widget);
+
+  for (w = window; w && w != widget_window; w = gdk_window_get_parent (w))
+    {
+      int wx, wy;
+      gdk_window_get_position (w, &wx, &wy);
+      *x += wx;
+      *y += wy;
+    }
+
+  if (w == NULL)
+    {
+      *x = 0;
+      *y = 0;
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+static void
+gimp_spin_scale_event_to_widget_coords (GtkWidget *widget,
+                                        GdkWindow *window,
+                                        gdouble    event_x,
+                                        gdouble    event_y,
+                                        gint      *widget_x,
+                                        gint      *widget_y)
+{
+  gint tx, ty;
+
+  if (gtk_widget_get_translation_to_window (widget, window, &tx, &ty))
+    {
+      event_x += tx;
+      event_y += ty;
+    }
+
+  *widget_x = event_x;
+  *widget_y = event_y;
+}
+
+static SpinScaleTarget
+gimp_spin_scale_get_target (GtkWidget *widget,
+                            gdouble    x,
+                            gdouble    y)
+{
+  GtkAllocation   allocation;
+  PangoRectangle  logical;
+  gint            layout_x;
+  gint            layout_y;
+
+  gtk_widget_get_allocation (widget, &allocation);
+  gtk_entry_get_layout_offsets (GTK_ENTRY (widget), &layout_x, &layout_y);
+  pango_layout_get_pixel_extents (gtk_entry_get_layout (GTK_ENTRY (widget)),
+                                  NULL, &logical);
+
+  GdkRectangle    text_area;
+  gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area);
+
+    if (x >= text_area.x && x < text_area.width &&
+        y >= text_area.y && y < text_area.height)
+       {
+        x -= text_area.x;
+        y -= text_area.y;
+
+        if (x > layout_x && x < layout_x + logical.width &&
+            y > layout_y && y < layout_y + logical.height)
+          {
+            return TARGET_NUMBER;
+          }
+        else if (y > text_area.height / 2)
+          {
+            return TARGET_LOWER;
+          }
+
+        return TARGET_UPPER;
+      }
+
+    return TARGET_NONE;
+}
+
+static void
+gimp_spin_scale_get_limits (GimpSpinScale *scale,
+                            gdouble       *lower,
+                            gdouble       *upper)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (scale);
+
+  if (private->scale_limits_set)
+    {
+      *lower = private->scale_lower;
+      *upper = private->scale_upper;
+    }
+  else
+    {
+      GtkSpinButton *spin_button = GTK_SPIN_BUTTON (scale);
+      GtkAdjustment *adjustment  = gtk_spin_button_get_adjustment (spin_button);
+
+      *lower = gtk_adjustment_get_lower (adjustment);
+      *upper = gtk_adjustment_get_upper (adjustment);
+    }
+}
+
+static void
+gimp_spin_scale_change_value (GtkWidget *widget,
+                              gdouble    x)
+{
+  GimpSpinScalePrivate *private     = GET_PRIVATE (widget);
+  GtkSpinButton        *spin_button = GTK_SPIN_BUTTON (widget);
+  GtkAdjustment        *adjustment  = gtk_spin_button_get_adjustment (spin_button);
+  gdouble               lower;
+  gdouble               upper;
+  gdouble               value;
+  GdkRectangle          text_area;
+  gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area);
+  gimp_spin_scale_get_limits (GIMP_SPIN_SCALE (widget), &lower, &upper);
+
+  if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+      x = text_area.width - x;
+
+  if (private->relative_change)
+    {
+      gdouble diff;
+      gdouble step;
+
+      step = (upper - lower) / text_area.width / 10.0;
+      if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+        diff = x - (text_area.width - private->start_x);
+      else
+        diff = x - private->start_x;
+
+      value = (private->start_value + diff * step);
+    }
+  else
+    {
+      gdouble fraction;
+
+      fraction = x / (gdouble) text_area.width;
+      if (fraction > 0.0)
+        fraction = pow (fraction, private->gamma);
+
+      value = fraction * (upper - lower) + lower;
+    }
+
+  gtk_adjustment_set_value (adjustment, value);
+}
+
+static gboolean
+gimp_spin_scale_button_press (GtkWidget      *widget,
+                              GdkEventButton *event)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+
+  private->changing_value  = FALSE;
+  private->relative_change = FALSE;
+
+  gint                  x, y;
+  gimp_spin_scale_event_to_widget_coords (widget, event->window,
+                                           event->x, event->y,
+                                           &x, &y);
+  switch (gimp_spin_scale_get_target (widget, x, y))
+    {
+    case TARGET_UPPER:
+      private->changing_value = TRUE;
+
+      gtk_widget_grab_focus (widget);
+
+      gimp_spin_scale_change_value (widget, x);
+
+      return TRUE;
+
+    case TARGET_LOWER:
+      private->changing_value = TRUE;
+
+      gtk_widget_grab_focus (widget);
+
+      private->relative_change = TRUE;
+      private->start_x = x;
+      private->start_value = gtk_adjustment_get_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)));
+
+      return TRUE;
+
+    default:
+      break;
+    }
+
+  return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event);
+}
+
+static gboolean
+gimp_spin_scale_button_release (GtkWidget      *widget,
+                                GdkEventButton *event)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+  gint                  x, y;
+
+  gimp_spin_scale_event_to_widget_coords (widget, event->window,
+                                          event->x, event->y,
+                                          &x, &y);
+
+  if (private->changing_value)
+    {
+      private->changing_value = FALSE;
+      gimp_spin_scale_change_value (widget, x);
+      return TRUE;
+    }
+
+  return GTK_WIDGET_CLASS (parent_class)->button_release_event (widget, event);
+}
+
+static gboolean
+gimp_spin_scale_motion_notify (GtkWidget      *widget,
+                               GdkEventMotion *event)
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+
+  gdk_event_request_motions (event);
+
+  gint                  x, y;
+
+  gimp_spin_scale_event_to_widget_coords (widget, event->window,
+                                          event->x, event->y,
+                                          &x, &y);
+
+  if (private->changing_value)
+    {
+      gimp_spin_scale_change_value (widget, x);
+
+      return TRUE;
+    }
+
+  GTK_WIDGET_CLASS (parent_class)->motion_notify_event (widget, event);
+
+  if (! (event->state &
+         (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK))
+      )
+    {
+      GdkDisplay *display = gtk_widget_get_display (widget);
+      GdkCursor  *cursor  = NULL;
+
+      switch (gimp_spin_scale_get_target (widget, x, y))
+        {
+        case TARGET_NUMBER:
+          cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
+          break;
+
+        case TARGET_UPPER:
+          cursor = gdk_cursor_new_for_display (display, GDK_SB_UP_ARROW);
+          break;
+
+        case TARGET_LOWER:
+          cursor = gdk_cursor_new_for_display (display, GDK_SB_H_DOUBLE_ARROW);
+          break;
+
+        default:
+          break;
+        }
+
+      if (cursor)
+        {
+          gdk_window_set_cursor (event->window, cursor);
+          g_object_unref (cursor);
+        }
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_spin_scale_leave_notify (GtkWidget        *widget,
+                              GdkEventCrossing *event)
+{
+  gdk_window_set_cursor (event->window, NULL);
+
+  return GTK_WIDGET_CLASS (parent_class)->leave_notify_event (widget, event);
+}
+
+gboolean gimp_spin_scale_keypress( GtkWidget *widget, GdkEventKey *event)
+{
+    GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+    guint key = 0;
+    gdk_keymap_translate_keyboard_state( gdk_keymap_get_for_display( gdk_display_get_default() ),
+                                         event->hardware_keycode, (GdkModifierType)event->state,
+                                         0, &key, 0, 0, 0 );
+
+    switch ( key ) {
+
+        case GDK_KEY_Escape:
+        case GDK_KEY_Return:
+        case GDK_KEY_KP_Enter:
+        {
+            private->transferFocus = TRUE;
+            gimp_spin_scale_defocus( GTK_SPIN_BUTTON(widget) );
+        }
+        break;
+
+    }
+
+    return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
+}
+
+static void
+gimp_spin_scale_defocus( GtkSpinButton *spin_button )
+{
+    GimpSpinScalePrivate *private = GET_PRIVATE (spin_button);
+
+    if ( private->transferFocus ) {
+        if ( private->focusWidget ) {
+            gtk_widget_grab_focus( private->focusWidget );
+        }
+    }
+}
+
+static void
+gimp_spin_scale_value_changed (GtkSpinButton *spin_button)
+{
+  GtkAdjustment *adjustment = gtk_spin_button_get_adjustment (spin_button);
+  GimpSpinScalePrivate *private = GET_PRIVATE (spin_button);
+  gdouble        lower;
+  gdouble        upper;
+  gdouble        value;
+
+  gimp_spin_scale_get_limits (GIMP_SPIN_SCALE (spin_button), &lower, &upper);
+
+  value = CLAMP (gtk_adjustment_get_value (adjustment), lower, upper);
+
+  gtk_entry_set_progress_fraction (GTK_ENTRY (spin_button),
+                                   pow ((value - lower) / (upper - lower),
+                                        1.0 / private->gamma));
+
+  // TODO - Allow scrollwheel to change value then return focus,
+  // but clicks/keypress should keep focus in the control
+  //if ( gtk_widget_has_focus( GTK_WIDGET(spin_button) ) ) {
+  //    gimp_spin_scale_defocus( spin_button );
+  //}
+}
+
+
+/*  public functions  */
+
+GtkWidget *
+gimp_spin_scale_new (GtkAdjustment *adjustment,
+                     const gchar   *label,
+                     gint           digits)
+{
+  g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
+
+  return g_object_new (GIMP_TYPE_SPIN_SCALE,
+                       "adjustment", adjustment,
+                       "label",      label,
+                       "digits",     digits,
+                       NULL);
+}
+
+void
+gimp_spin_scale_set_label (GimpSpinScale *scale,
+                           const gchar   *label)
+{
+  GimpSpinScalePrivate *private;
+
+  g_return_if_fail (GIMP_IS_SPIN_SCALE (scale));
+
+  private = GET_PRIVATE (scale);
+
+  if (label == private->label)
+    return;
+
+  g_free (private->label);
+  private->label = g_strdup (label);
+
+  if (private->layout)
+    {
+      g_object_unref (private->layout);
+      private->layout = NULL;
+    }
+
+  gtk_widget_queue_resize (GTK_WIDGET (scale));
+
+  g_object_notify (G_OBJECT (scale), "label");
+}
+
+const gchar *
+gimp_spin_scale_get_label (GimpSpinScale *scale)
+{
+  g_return_val_if_fail (GIMP_IS_SPIN_SCALE (scale), NULL);
+
+  return GET_PRIVATE (scale)->label;
+}
+
+void
+gimp_spin_scale_set_scale_limits (GimpSpinScale *scale,
+                                  gdouble        lower,
+                                  gdouble        upper)
+{
+  GimpSpinScalePrivate *private;
+  GtkSpinButton        *spin_button;
+  GtkAdjustment        *adjustment;
+
+  g_return_if_fail (GIMP_IS_SPIN_SCALE (scale));
+
+  private     = GET_PRIVATE (scale);
+  spin_button = GTK_SPIN_BUTTON (scale);
+  adjustment  = gtk_spin_button_get_adjustment (spin_button);
+
+  g_return_if_fail (lower >= gtk_adjustment_get_lower (adjustment));
+  g_return_if_fail (upper <= gtk_adjustment_get_upper (adjustment));
+
+  private->scale_limits_set = TRUE;
+  private->scale_lower      = lower;
+  private->scale_upper      = upper;
+  private->gamma            = 1.0;
+
+  gimp_spin_scale_value_changed (spin_button);
+}
+
+void
+gimp_spin_scale_unset_scale_limits (GimpSpinScale *scale)
+{
+  GimpSpinScalePrivate *private;
+
+  g_return_if_fail (GIMP_IS_SPIN_SCALE (scale));
+
+  private = GET_PRIVATE (scale);
+
+  private->scale_limits_set = FALSE;
+  private->scale_lower      = 0.0;
+  private->scale_upper      = 0.0;
+
+  gimp_spin_scale_value_changed (GTK_SPIN_BUTTON (scale));
+}
+
+gboolean
+gimp_spin_scale_get_scale_limits (GimpSpinScale *scale,
+                                  gdouble       *lower,
+                                  gdouble       *upper)
+{
+  GimpSpinScalePrivate *private;
+
+  g_return_val_if_fail (GIMP_IS_SPIN_SCALE (scale), FALSE);
+
+  private = GET_PRIVATE (scale);
+
+  if (lower)
+    *lower = private->scale_lower;
+
+  if (upper)
+    *upper = private->scale_upper;
+
+  return private->scale_limits_set;
+}
+
+void
+gimp_spin_scale_set_gamma (GimpSpinScale *scale,
+                           gdouble        gamma)
+{
+  GimpSpinScalePrivate *private;
+
+  g_return_if_fail (GIMP_IS_SPIN_SCALE (scale));
+
+  private = GET_PRIVATE (scale);
+
+  private->gamma = gamma;
+
+  gimp_spin_scale_value_changed (GTK_SPIN_BUTTON (scale));
+}
+
+gdouble
+gimp_spin_scale_get_gamma (GimpSpinScale *scale)
+{
+  g_return_val_if_fail (GIMP_IS_SPIN_SCALE (scale), 1.0);
+
+  return GET_PRIVATE(scale)->gamma;
+}
diff --git a/src/widgets/gimp/gimpspinscale.h b/src/widgets/gimp/gimpspinscale.h
new file mode 100644
index 000000000..b42a0faf8
--- /dev/null
+++ b/src/widgets/gimp/gimpspinscale.h
@@ -0,0 +1,82 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpspinscale.h
+ * Copyright (C) 2010  Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_SPIN_SCALE_H__
+#define __GIMP_SPIN_SCALE_H__
+
+#ifndef WITH_GIMP
+#include <gtk/gtk.h>
+#endif
+
+G_BEGIN_DECLS
+
+#define GIMP_TYPE_SPIN_SCALE            (gimp_spin_scale_get_type ())
+#define GIMP_SPIN_SCALE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_SPIN_SCALE, GimpSpinScale))
+#define GIMP_SPIN_SCALE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_SPIN_SCALE, GimpSpinScaleClass))
+#define GIMP_IS_SPIN_SCALE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_SPIN_SCALE))
+#define GIMP_IS_SPIN_SCALE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_SPIN_SCALE))
+#define GIMP_SPIN_SCALE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_SPIN_SCALE, GimpSpinScaleClass))
+
+
+typedef struct _GimpSpinScale      GimpSpinScale;
+typedef struct _GimpSpinScaleClass GimpSpinScaleClass;
+
+struct _GimpSpinScale
+{
+  GtkSpinButton  parent_instance;
+};
+
+struct _GimpSpinScaleClass
+{
+  GtkSpinButtonClass  parent_class;
+};
+
+
+GType         gimp_spin_scale_get_type           (void) G_GNUC_CONST;
+
+GtkWidget   * gimp_spin_scale_new                (GtkAdjustment *adjustment,
+                                                  const gchar   *label,
+                                                  gint           digits);
+
+void          gimp_spin_scale_set_label          (GimpSpinScale *scale,
+                                                  const gchar   *label);
+const gchar * gimp_spin_scale_get_label          (GimpSpinScale *scale);
+
+void          gimp_spin_scale_set_scale_limits   (GimpSpinScale *scale,
+                                                  gdouble        lower,
+                                                  gdouble        upper);
+void          gimp_spin_scale_unset_scale_limits (GimpSpinScale *scale);
+gboolean      gimp_spin_scale_get_scale_limits   (GimpSpinScale *scale,
+                                                  gdouble       *lower,
+                                                  gdouble       *upper);
+
+void          gimp_spin_scale_set_gamma          (GimpSpinScale *scale,
+                                                  gdouble        gamma);
+gdouble       gimp_spin_scale_get_gamma          (GimpSpinScale *scale);
+
+void          gimp_spin_scale_set_focuswidget    (GtkWidget     *scale,
+                                                  GtkWidget     *widget);
+
+void          gimp_spin_scale_set_appearance     (GtkWidget     *scale,
+                                                  const gchar   *appearance);
+
+G_END_DECLS
+
+#endif  /*  __GIMP_SPIN_SCALE_H__  */
diff --git a/src/widgets/ruler.cpp b/src/widgets/gimp/ruler.cpp
index bfb9c9071..bfb9c9071 100644
--- a/src/widgets/ruler.cpp
+++ b/src/widgets/gimp/ruler.cpp
diff --git a/src/widgets/ruler.h b/src/widgets/gimp/ruler.h
index ed529d082..ed529d082 100644
--- a/src/widgets/ruler.h
+++ b/src/widgets/gimp/ruler.h