Fix for 1014988 : Add gimp spin scale widget

(bzr r11690)

5 files changed, 1534 insertions, 0 deletions

diff --git a/src/ui/widget/Makefile_insert b/src/ui/widget/Makefile_insert
index 8589f16b0..bbda64648 100644
--- a/src/ui/widget/Makefile_insert
+++ b/src/ui/widget/Makefile_insert
@@ -19,6 +19,8 @@ ink_common_sources +=	\
 	ui/widget/entry.h        \
 	ui/widget/filter-effect-chooser.h \
 	ui/widget/filter-effect-chooser.cpp \
+	ui/widget/gimpspinscale.c      \
+	ui/widget/gimpspinscale.h        \
 	ui/widget/frame.cpp      \
 	ui/widget/frame.h        \
 	ui/widget/imageicon.cpp		\
@@ -62,6 +64,8 @@ ink_common_sources +=	\
 	ui/widget/selected-style.cpp	\
 	ui/widget/spinbutton.h	\
 	ui/widget/spinbutton.cpp	\
+	ui/widget/spin-scale.h		\
+	ui/widget/spin-scale.cpp	\
 	ui/widget/spin-slider.h		\
 	ui/widget/spin-slider.cpp	\
 	ui/widget/style-subject.h	\
diff --git a/src/ui/widget/gimpspinscale.c b/src/ui/widget/gimpspinscale.c
new file mode 100644
index 000000000..1b7ac7bfe
--- /dev/null
+++ b/src/ui/widget/gimpspinscale.c
@@ -0,0 +1,1089 @@
+/* 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
+#if WITH_GTKMM_3_0
+  ,TARGET_NONE
+#endif
+} 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);
+
+#if WITH_GTKMM_3_0
+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);
+#else
+static void       gimp_spin_scale_size_request   (GtkWidget        *widget,
+                                                  GtkRequisition   *requisition);
+
+static gboolean   gimp_spin_scale_expose         (GtkWidget        *widget,
+                                                  GdkEventExpose   *event);
+#endif
+
+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;
+#if WITH_GTKMM_3_0
+  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;
+#else
+  widget_class->size_request         = gimp_spin_scale_size_request;
+  widget_class->expose_event         = gimp_spin_scale_expose;
+#endif
+  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_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);
+
+  switch (property_id)
+    {
+    case PROP_LABEL:
+      g_free (private->label);
+      private->label = g_value_dup_string (value);
+      if (private->layout)
+        {
+          g_object_unref (private->layout);
+          private->layout = NULL;
+        }
+      gtk_widget_queue_resize (GTK_WIDGET (object));
+      break;
+
+    case PROP_FOCUS_WIDGET:
+    {
+        /* TODO unhook prior */
+        private->focusWidget = (GtkWidget*)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);
+
+  switch (property_id)
+    {
+    case PROP_LABEL:
+      g_value_set_string (value, private->label);
+      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
+#if WITH_GTKMM_3_0
+gimp_spin_scale_get_preferred_width (GtkWidget *widget,
+                                     gint      *minimum_width,
+                                     gint      *natural_width)
+#else
+gimp_spin_scale_size_request (GtkWidget      *widget,
+                              GtkRequisition *requisition)
+#endif
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+  GtkStyle             *style   = gtk_widget_get_style (widget);
+  PangoContext         *context = gtk_widget_get_pango_context (widget);
+  PangoFontMetrics     *metrics;
+
+#if WITH_GTKMM_3_0
+  GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget,
+                                                          minimum_width,
+                                                          natural_width);
+#else
+  gint                  height;
+  GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
+#endif
+
+  metrics = pango_context_get_metrics (context, style->font_desc,
+                                       pango_context_get_language (context));
+
+#if WITH_GTKMM_3_0
+#else
+  height = PANGO_PIXELS (pango_font_metrics_get_ascent (metrics) +
+                         pango_font_metrics_get_descent (metrics));
+
+  if (private->appearanceMode == APPEARANCE_COMPACT) {
+      requisition->height += 1;
+  } else {
+      requisition->height += height;
+  }
+
+#endif
+
+
+  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));
+
+#if WITH_GTKMM_3_0
+      *minimum_width += char_pixels * 3;
+      *natural_width += char_pixels * 3;
+#else
+      /* ~3 chars for the ellipses */
+      requisition->width += char_pixels * 3;
+#endif
+
+    }
+
+  pango_font_metrics_unref (metrics);
+}
+
+#if WITH_GTKMM_3_0
+static void
+gimp_spin_scale_get_preferred_height (GtkWidget *widget,
+                                      gint      *minimum_height,
+                                      gint      *natural_height)
+{
+  GtkStyle         *style   = gtk_widget_get_style (widget);
+  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, style->font_desc,
+                                       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);
+}
+#endif
+
+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
+
+#if WITH_GTKMM_3_0
+    gimp_spin_scale_draw (GtkWidget *widget, cairo_t   *cr)
+#else
+    gimp_spin_scale_expose (GtkWidget      *widget, GdkEventExpose *event)
+#endif
+{
+  GimpSpinScalePrivate *private = GET_PRIVATE (widget);
+  GtkStyle             *style   = gtk_widget_get_style (widget);
+
+
+#if WITH_GTKMM_3_0
+    GtkAllocation         allocation;
+
+    cairo_save (cr);
+    GTK_WIDGET_CLASS (parent_class)->draw (widget, cr);
+    cairo_restore (cr);
+
+    gtk_widget_get_allocation (widget, &allocation);
+
+
+#else
+    cairo_t              *cr;
+    gint                  w;
+
+    GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
+
+    cr = gdk_cairo_create (event->window);
+    gdk_cairo_region (cr, event->region);
+    cairo_clip (cr);
+
+    w = gdk_window_get_width (event->window);
+
+#endif
+
+    cairo_set_line_width (cr, 1.0);
+
+
+#if WITH_GTKMM_3_0
+      if (private->label)
+      {
+          GdkRectangle   text_area;
+          gint           minimum_width;
+          gint           natural_width;
+#else
+      if (private->label  &&
+          gtk_widget_is_drawable (widget) &&
+          event->window == gtk_entry_get_text_window (GTK_ENTRY (widget)))
+      {
+          GtkRequisition requisition;
+          GtkAllocation  allocation;
+#endif
+
+      PangoRectangle logical;
+      gint           layout_offset_x;
+      gint           layout_offset_y;
+
+#if WITH_GTKMM_3_0
+      gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area);
+
+      GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget,
+                                                               &minimum_width,
+                                                               &natural_width);
+#else
+      GTK_WIDGET_CLASS (parent_class)->size_request (widget, &requisition);
+      gtk_widget_get_allocation (widget, &allocation);
+#endif
+
+      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 *
+#if WITH_GTKMM_3_0
+                              (allocation.width - minimum_width + 10));
+#else
+                              (allocation.width - requisition.width + 10));
+#endif
+      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)
+#if WITH_GTKMM_3_0
+          layout_offset_x = text_area.x + text_area.width - logical.width - 4;
+#else
+          layout_offset_x = w - logical.width - 4;
+#endif
+      else
+        layout_offset_x = 4;
+
+      layout_offset_x -= logical.x;
+
+#if WITH_GTKMM_3_0
+      cairo_move_to (cr, layout_offset_x, text_area.y + layout_offset_y-3);
+#else
+      cairo_move_to (cr, layout_offset_x, layout_offset_y-3);
+#endif
+
+      gdk_cairo_set_source_color (cr,
+                                  &style->text[gtk_widget_get_state (widget)]);
+
+      pango_cairo_show_layout (cr, private->layout);
+    }
+
+#if WITH_GTKMM_3_0
+#else
+  cairo_destroy (cr);
+#endif
+
+  return FALSE;
+}
+
+#if WITH_GTKMM_3_0
+/* 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;
+}
+#endif
+
+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);
+
+#if WITH_GTKMM_3_0
+  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;
+#else
+  if (x > layout_x && x < layout_x + logical.width &&
+      y > layout_y && y < layout_y + logical.height)
+    {
+      return TARGET_NUMBER;
+    }
+
+  else if (y > allocation.height / 2)
+    {
+      return TARGET_LOWER;
+    }
+  return TARGET_UPPER;
+#endif
+}
+
+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;
+#if WITH_GTKMM_3_0
+#else
+#endif
+#if WITH_GTKMM_3_0
+  GdkRectangle          text_area;
+  gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area);
+  gimp_spin_scale_get_limits (GIMP_SPIN_SCALE (widget), &lower, &upper);
+#else
+  GdkWindow *text_window = gtk_entry_get_text_window (GTK_ENTRY (widget));
+  gint                  width;
+
+  gimp_spin_scale_get_limits (GIMP_SPIN_SCALE (widget), &lower, &upper);
+  width = gdk_window_get_width (text_window);
+
+#endif
+
+
+  if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+#if WITH_GTKMM_3_0
+      x = text_area.width - x;
+#else
+      x = width - x;
+#endif
+
+
+  if (private->relative_change)
+    {
+      gdouble diff;
+      gdouble step;
+
+
+#if WITH_GTKMM_3_0
+      step = (upper - lower) / text_area.width / 10.0;
+#else
+      step = (upper - lower) / width / 10.0;
+#endif
+      if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+
+#if WITH_GTKMM_3_0
+        diff = x - (text_area.width - private->start_x);
+#else
+        diff = x - (width - private->start_x);
+#endif
+      else
+        diff = x - private->start_x;
+
+      value = (private->start_value + diff * step);
+    }
+  else
+    {
+      gdouble fraction;
+
+
+#if WITH_GTKMM_3_0
+      fraction = x / (gdouble) text_area.width;
+#else
+      fraction = x / (gdouble) width;
+#endif
+      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;
+
+#if WITH_GTKMM_3_0
+  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;
+    }
+#else
+  if (event->window == gtk_entry_get_text_window (GTK_ENTRY (widget)))
+    {
+      switch (gimp_spin_scale_get_target (widget, event->x, event->y))
+        {
+        case TARGET_UPPER:
+          private->changing_value = TRUE;
+
+          gtk_widget_grab_focus (widget);
+
+          gimp_spin_scale_change_value (widget, event->x);
+
+          return TRUE;
+
+        case TARGET_LOWER:
+          private->changing_value = TRUE;
+
+          gtk_widget_grab_focus (widget);
+
+          private->relative_change = TRUE;
+          private->start_x = event->x;
+          private->start_value = gtk_adjustment_get_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)));
+
+          return TRUE;
+
+        default:
+          break;
+        }
+    }
+#endif
+
+  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);
+#if WITH_GTKMM_3_0
+  gint                  x, y;
+
+  gimp_spin_scale_event_to_widget_coords (widget, event->window,
+                                          event->x, event->y,
+                                          &x, &y);
+#endif
+
+  if (private->changing_value)
+    {
+      private->changing_value = FALSE;
+#if WITH_GTKMM_3_0
+      gimp_spin_scale_change_value (widget, x);
+#else
+      gimp_spin_scale_change_value (widget, event->x);
+#endif
+      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);
+#if WITH_GTKMM_3_0
+  gint                  x, y;
+
+  gimp_spin_scale_event_to_widget_coords (widget, event->window,
+                                          event->x, event->y,
+                                          &x, &y);
+#endif
+
+  if (private->changing_value)
+    {
+#if WITH_GTKMM_3_0
+      gimp_spin_scale_change_value (widget, x);
+#else
+      gimp_spin_scale_change_value (widget, event->x);
+#endif
+
+      return TRUE;
+    }
+
+  GTK_WIDGET_CLASS (parent_class)->motion_notify_event (widget, event);
+
+  if (! (event->state &
+         (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK))
+#if WITH_GTKMM_3_0
+#else
+         && event->window == gtk_entry_get_text_window (GTK_ENTRY (widget))
+#endif
+      )
+    {
+      GdkDisplay *display = gtk_widget_get_display (widget);
+      GdkCursor  *cursor  = NULL;
+
+#if WITH_GTKMM_3_0
+      switch (gimp_spin_scale_get_target (widget, x, y))
+#else
+      switch (gimp_spin_scale_get_target (widget, event->x, event->y))
+#endif
+        {
+        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 WITH_GTKMM_3_0
+      if (cursor)
+        {
+          gdk_window_set_cursor (event->window, cursor);
+          g_object_unref (cursor);
+        }
+#else
+        gdk_window_set_cursor (event->window, cursor);
+        gdk_cursor_unref (cursor);
+#endif
+    }
+
+  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_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_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)
+{
+  GimpSpinScalePrivate *private;
+
+  g_return_val_if_fail (GIMP_IS_SPIN_SCALE (scale), 1.0);
+
+  private = GET_PRIVATE (scale);
+
+  return private->gamma;
+}
+
+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;
+}
diff --git a/src/ui/widget/gimpspinscale.h b/src/ui/widget/gimpspinscale.h
new file mode 100644
index 000000000..ad63625ac
--- /dev/null
+++ b/src/ui/widget/gimpspinscale.h
@@ -0,0 +1,76 @@
+/* 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_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/ui/widget/spin-scale.cpp b/src/ui/widget/spin-scale.cpp
new file mode 100644
index 000000000..00c575568
--- /dev/null
+++ b/src/ui/widget/spin-scale.cpp
@@ -0,0 +1,248 @@
+/*
+ * Author:
+ *
+ * Copyright (C) 2012 Author
+ *
+ * Released under GNU GPL.  Read the file 'COPYING' for more information.
+ */
+
+#include <glib.h>
+#include <glibmm/i18n.h>
+#include <glibmm/stringutils.h>
+#include <gtkmm/adjustment.h>
+
+#include "spin-scale.h"
+#include "ui/widget/gimpspinscale.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+SpinScale::SpinScale(const char* label, double value, double lower, double upper, double step_inc,
+                       double climb_rate, int digits, const SPAttributeEnum a, const char* tip_text)
+    : AttrWidget(a, value)
+{
+
+#if WITH_GTKMM_3_0
+    _adjustment = Gtk::Adjustment::create(value, lower, upper, step_inc);
+    _spinscale = gimp_spin_scale_new (_adjustment->gobj(), label, digits);
+#else
+    _adjustment = new Gtk::Adjustment(value, lower, upper, step_inc);
+    _spinscale = gimp_spin_scale_new (_adjustment->gobj(), label, digits);
+#endif
+
+    signal_value_changed().connect(signal_attr_changed().make_slot());
+
+    pack_start(*Gtk::manage(Glib::wrap(_spinscale)));
+
+    if (tip_text){
+        gtk_widget_set_tooltip_text( _spinscale, tip_text );
+    }
+
+    show_all_children();
+}
+
+SpinScale::SpinScale(const char* label,
+#if WITH_GTKMM_3_0
+       Glib::RefPtr<Gtk::Adjustment> adj,
+#else
+       Gtk::Adjustment *adj,
+#endif
+        int digits, const SPAttributeEnum a, const char* tip_text)
+    : AttrWidget(a, 0.0),
+      _adjustment(adj)
+
+{
+
+    _spinscale = gimp_spin_scale_new (_adjustment->gobj(), label, digits);
+
+    signal_value_changed().connect(signal_attr_changed().make_slot());
+
+    pack_start(*Gtk::manage(Glib::wrap(_spinscale)));
+
+    if (tip_text){
+        gtk_widget_set_tooltip_text( _spinscale, tip_text );
+    }
+
+    show_all_children();
+}
+
+Glib::ustring SpinScale::get_as_attribute() const
+{
+    const double val = _adjustment->get_value();
+
+    //if(_spin.get_digits() == 0)
+    //    return Glib::Ascii::dtostr((int)val);
+    //else
+        return Glib::Ascii::dtostr(val);
+}
+
+void SpinScale::set_from_attribute(SPObject* o)
+{
+    const gchar* val = attribute_value(o);
+    if(val)
+        _adjustment->set_value(Glib::Ascii::strtod(val));
+    else
+        _adjustment->set_value(get_default()->as_double());
+}
+
+Glib::SignalProxy0<void> SpinScale::signal_value_changed()
+{
+    return _adjustment->signal_value_changed();
+}
+
+double SpinScale::get_value() const
+{
+    return _adjustment->get_value();
+}
+
+void SpinScale::set_value(const double val)
+{
+    _adjustment->set_value(val);
+}
+
+void SpinScale::set_focuswidget(GtkWidget *widget)
+{
+    gimp_spin_scale_set_focuswidget(_spinscale, widget);
+}
+
+
+void SpinScale::set_appearance(const gchar* appearance)
+{
+    gimp_spin_scale_set_appearance(_spinscale, appearance);
+}
+
+#if WITH_GTKMM_3_0
+const Glib::RefPtr<Gtk::Adjustment> SpinScale::get_adjustment() const
+#else
+const Gtk::Adjustment *SpinScale::get_adjustment() const
+#endif
+{
+    return _adjustment;
+}
+#if WITH_GTKMM_3_0
+Glib::RefPtr<Gtk::Adjustment> SpinScale::get_adjustment()
+#else
+Gtk::Adjustment *SpinScale::get_adjustment()
+#endif
+{
+    return _adjustment;
+}
+
+
+DualSpinScale::DualSpinScale(const char* label1, const char* label2, double value, double lower, double upper, double step_inc,
+                               double climb_rate, int digits, const SPAttributeEnum a, char* tip_text1, char* tip_text2)
+    : AttrWidget(a),
+      _s1(label1, value, lower, upper, step_inc, climb_rate, digits, SP_ATTR_INVALID, tip_text1),
+      _s2(label2, value, lower, upper, step_inc, climb_rate, digits, SP_ATTR_INVALID, tip_text2),
+      //TRANSLATORS: "Link" means to _link_ two sliders together
+      _link(C_("Sliders", "Link"))
+{
+    signal_value_changed().connect(signal_attr_changed().make_slot());
+
+    _s1.get_adjustment()->signal_value_changed().connect(_signal_value_changed.make_slot());
+    _s2.get_adjustment()->signal_value_changed().connect(_signal_value_changed.make_slot());
+    _s1.get_adjustment()->signal_value_changed().connect(sigc::mem_fun(*this, &DualSpinScale::update_linked));
+
+    _link.signal_toggled().connect(sigc::mem_fun(*this, &DualSpinScale::link_toggled));
+
+    Gtk::VBox* vb = Gtk::manage(new Gtk::VBox);
+    vb->add(_s1);
+    vb->add(_s2);
+    pack_start(*vb);
+    pack_start(_link, false, false);
+    _link.set_active(true);
+
+    show_all();
+}
+
+Glib::ustring DualSpinScale::get_as_attribute() const
+{
+    if(_link.get_active())
+        return _s1.get_as_attribute();
+    else
+        return _s1.get_as_attribute() + " " + _s2.get_as_attribute();
+}
+
+void DualSpinScale::set_from_attribute(SPObject* o)
+{
+    const gchar* val = attribute_value(o);
+    if(val) {
+        // Split val into parts
+        gchar** toks = g_strsplit(val, " ", 2);
+
+        if(toks) {
+            double v1 = 0.0, v2 = 0.0;
+            if(toks[0])
+                v1 = v2 = Glib::Ascii::strtod(toks[0]);
+            if(toks[1])
+                v2 = Glib::Ascii::strtod(toks[1]);
+
+            _link.set_active(toks[1] == 0);
+
+            _s1.get_adjustment()->set_value(v1);
+            _s2.get_adjustment()->set_value(v2);
+
+            g_strfreev(toks);
+        }
+    }
+}
+
+sigc::signal<void>& DualSpinScale::signal_value_changed()
+{
+    return _signal_value_changed;
+}
+
+const SpinScale& DualSpinScale::get_SpinScale1() const
+{
+    return _s1;
+}
+
+SpinScale& DualSpinScale::get_SpinScale1()
+{
+    return _s1;
+}
+
+const SpinScale& DualSpinScale::get_SpinScale2() const
+{
+    return _s2;
+}
+
+SpinScale& DualSpinScale::get_SpinScale2()
+{
+    return _s2;
+}
+
+/*void DualSpinScale::remove_scale()
+{
+    _s1.remove_scale();
+    _s2.remove_scale();
+}*/
+
+void DualSpinScale::link_toggled()
+{
+    _s2.set_sensitive(!_link.get_active());
+    update_linked();
+}
+
+void DualSpinScale::update_linked()
+{
+    if(_link.get_active())
+        _s2.set_value(_s1.get_value());
+}
+
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+/* 
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
diff --git a/src/ui/widget/spin-scale.h b/src/ui/widget/spin-scale.h
new file mode 100644
index 000000000..a8403307f
--- /dev/null
+++ b/src/ui/widget/spin-scale.h
@@ -0,0 +1,117 @@
+/*
+ * Author:
+ *
+ * Copyright (C) 2012 Author
+ *
+ * Released under GNU GPL.  Read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_SPIN_SCALE_H
+#define INKSCAPE_UI_WIDGET_SPIN_SCALE_H
+
+#include <gtkmm/adjustment.h>
+#include <gtkmm/box.h>
+#include <gtkmm/scale.h>
+#include <gtkmm/togglebutton.h>
+#include "spinbutton.h"
+#include "attr-widget.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+/**
+ * Wrap the gimpspinscale class
+ * A combo widget with label, scale slider, spinbutton and adjustment
+ */
+class SpinScale : public Gtk::HBox, public AttrWidget
+{
+
+public:
+    SpinScale(const char* label, double value, double lower, double upper, double step_inc, double climb_rate,
+	       int digits, const SPAttributeEnum a = SP_ATTR_INVALID, const char* tip_text = NULL);
+
+    SpinScale(const char* label,
+#if WITH_GTKMM_3_0
+       Glib::RefPtr<Gtk::Adjustment> adj,
+#else
+       Gtk::Adjustment *adj,
+#endif
+           int digits, const SPAttributeEnum a = SP_ATTR_INVALID, const char* tip_text = NULL);
+
+    virtual Glib::ustring get_as_attribute() const;
+    virtual void set_from_attribute(SPObject*);
+
+    // Shortcuts to _adjustment
+    Glib::SignalProxy0<void> signal_value_changed();
+    double get_value() const;
+    void set_value(const double);
+    void set_focuswidget(GtkWidget *widget);
+    void set_appearance(const gchar* appearance);
+
+#if WITH_GTKMM_3_0
+    const Glib::RefPtr<Gtk::Adjustment> get_adjustment() const;
+    Glib::RefPtr<Gtk::Adjustment> get_adjustment();
+#else
+    const Gtk::Adjustment *get_adjustment() const;
+    Gtk::Adjustment *get_adjustment();
+#endif
+    
+private:
+#if WITH_GTKMM_3_0
+    Glib::RefPtr<Gtk::Adjustment> _adjustment;
+#else
+    Gtk::Adjustment *_adjustment;
+#endif
+
+    GtkWidget *_spinscale;
+};
+
+
+/**
+ * Contains two SpinScales for controlling number-opt-number attributes.
+ *
+ * @see SpinScale
+ */
+class DualSpinScale : public Gtk::HBox, public AttrWidget
+{
+public:
+    DualSpinScale(const char* label1, const char* label2, double value, double lower, double upper, double step_inc,
+                   double climb_rate, int digits, const SPAttributeEnum, char* tip_text1, char* tip_text2);
+
+    virtual Glib::ustring get_as_attribute() const;
+    virtual void set_from_attribute(SPObject*);
+
+    sigc::signal<void>& signal_value_changed();
+
+    const SpinScale& get_SpinScale1() const;
+    SpinScale& get_SpinScale1();
+
+    const SpinScale& get_SpinScale2() const;
+    SpinScale& get_SpinScale2();
+
+    //void remove_scale();
+private:
+    void link_toggled();
+    void update_linked();
+    sigc::signal<void> _signal_value_changed;
+    SpinScale _s1, _s2;
+    Gtk::ToggleButton _link;
+};
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_WIDGET_SPIN_SCALE_H
+
+/* 
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :