moved widgets/sp-color-slider to ui/widget/color-slider

(bzr r13341.6.2)

4 files changed, 1111 insertions, 0 deletions

diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 7d80f1e36..883ba3427 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -109,6 +109,7 @@ set(ui_SRC
 	widget/button.cpp
 	widget/color-picker.cpp
 	widget/color-preview.cpp
+	widget/color-slider.cpp
 	widget/dock-item.cpp
 	widget/dock.cpp
 	widget/entity-entry.cpp
@@ -270,6 +271,7 @@ set(ui_SRC
 	widget/button.h
 	widget/color-picker.h
 	widget/color-preview.h
+	widget/color-slider.h
 	widget/combo-enums.h
 	widget/dock-item.h
 	widget/dock.h
diff --git a/src/ui/widget/Makefile_insert b/src/ui/widget/Makefile_insert
index 608dd5334..6deaf6671 100644
--- a/src/ui/widget/Makefile_insert
+++ b/src/ui/widget/Makefile_insert
@@ -10,6 +10,8 @@ ink_common_sources +=	\
 	ui/widget/color-picker.h        \
 	ui/widget/color-preview.cpp     \
 	ui/widget/color-preview.h       \
+	ui/widget/color-slider.cpp      \
+	ui/widget/color-slider.h       \
 	ui/widget/combo-enums.h \
 	ui/widget/dock.h		\
 	ui/widget/dock.cpp		\
diff --git a/src/ui/widget/color-slider.cpp b/src/ui/widget/color-slider.cpp
new file mode 100644
index 000000000..430239f00
--- /dev/null
+++ b/src/ui/widget/color-slider.cpp
@@ -0,0 +1,961 @@
+/**
+ * @file
+ * A slider with colored background - implementation.
+ */
+/* Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2001-2002 Lauris Kaplinski
+ *
+ * This code is in public domain
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "color-slider.h"
+
+#include <gtk/gtk.h>
+#include <gdkmm/screen.h>
+#include <gdkmm/general.h>
+#include <gtkmm/adjustment.h>
+
+#include "widgets/sp-color-scales.h"
+#include "preferences.h"
+
+static const gint SLIDER_WIDTH = 96;
+static const gint SLIDER_HEIGHT = 8;
+static const gint ARROW_SIZE = 7;
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+ColorSlider::ColorSlider(Gtk::Adjustment* adjustment)
+    : _dragging(false)
+    , _adjustment(NULL)
+    , _value(0.0)
+    , _oldvalue(0.0)
+    , _mapsize(0)
+    , _map(NULL)
+{
+    _c0[0] = 0x00;
+    _c0[1] = 0x00;
+    _c0[2] = 0x00;
+    _c0[3] = 0xff;
+
+    _cm[0] = 0xff;
+    _cm[1] = 0x00;
+    _cm[2] = 0x00;
+    _cm[3] = 0xff;
+
+    _c0[0] = 0xff;
+    _c0[1] = 0xff;
+    _c0[2] = 0xff;
+    _c0[3] = 0xff;
+
+    _b0 = 0x5f;
+    _b1 = 0xa0;
+    _bmask = 0x08;
+
+    set_adjustment(adjustment);
+}
+
+ColorSlider::~ColorSlider() {
+    if (_adjustment) {
+        //TODO: disconnect all connections
+        delete _adjustment;
+        _adjustment = NULL;
+    }
+}
+
+void ColorSlider::on_realize() {
+    set_realized();
+
+    if(!_refGdkWindow)
+    {
+      GdkWindowAttr attributes;
+      gint attributes_mask;
+      Gtk::Allocation allocation = get_allocation();
+
+      memset(&attributes, 0, sizeof(attributes));
+      attributes.x = allocation.get_x();
+      attributes.y = allocation.get_y();
+      attributes.width = allocation.get_width();
+      attributes.height = allocation.get_height();
+      attributes.window_type = GDK_WINDOW_CHILD;
+      attributes.wclass = GDK_INPUT_OUTPUT;
+      attributes.visual = gdk_screen_get_system_visual(gdk_screen_get_default());
+#if !GTK_CHECK_VERSION(3,0,0)
+      attributes.colormap = gdk_screen_get_system_colormap(gdk_screen_get_default());
+#endif
+      attributes.event_mask = get_events ();
+      attributes.event_mask |= (Gdk::EXPOSURE_MASK |
+                                Gdk::BUTTON_PRESS_MASK |
+                                Gdk::BUTTON_RELEASE_MASK |
+                                Gdk::POINTER_MOTION_MASK |
+                                Gdk::ENTER_NOTIFY_MASK |
+                                Gdk::LEAVE_NOTIFY_MASK);
+
+#if GTK_CHECK_VERSION(3,0,0)
+      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+#else
+      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
+#endif
+
+      _refGdkWindow = Gdk::Window::create(get_parent_window(), &attributes,
+              attributes_mask);
+      set_window(_refGdkWindow);
+      _refGdkWindow->set_user_data(gobj());
+
+      style_attach();
+    }
+}
+
+void ColorSlider::on_unrealize() {
+    _refGdkWindow.reset();
+
+    Gtk::Widget::on_unrealize();
+}
+
+void ColorSlider::on_size_request(Gtk::Requisition* requisition) {
+    GtkStyle *style = gtk_widget_get_style(gobj());
+    requisition->width = SLIDER_WIDTH + style->xthickness * 2;
+    requisition->height = SLIDER_HEIGHT + style->ythickness * 2;
+}
+
+//TODO: GTK3 prefferred width/height
+
+void ColorSlider::on_size_allocate(Gtk::Allocation& allocation) {
+    if (get_realized()) {
+        _refGdkWindow->move_resize(allocation.get_x(), allocation.get_y(),
+                allocation.get_width(), allocation.get_height());
+    }
+}
+
+//TODO: if not GTK3
+bool ColorSlider::on_expose_event(GdkEventExpose* event) {
+    bool result = false;
+
+    if (get_is_drawable()) {
+        Cairo::RefPtr<Cairo::Context> cr = _refGdkWindow->create_cairo_context();
+        result = on_draw(cr);
+    }
+    return result;
+}
+
+bool ColorSlider::on_button_press_event(GdkEventButton *event) {
+    //TODO: implementation
+    return false;
+}
+
+bool ColorSlider::on_button_release_event(GdkEventButton *event) {
+    //TODO: implementation
+    return false;
+}
+
+bool ColorSlider::on_motion_notify_event(GdkEventMotion *event) {
+    //TODO: implementation
+    return false;
+}
+
+void ColorSlider::set_adjustment(Gtk::Adjustment* /*adjustment*/) {
+    //TODO: implementation
+}
+
+void ColorSlider::set_colors(guint32 start, guint32 min, guint32 end) {
+
+}
+
+void ColorSlider::set_map(const guchar *map) {
+
+}
+
+void ColorSlider::set_background(guint dark, guint light, guint size) {
+
+}
+
+bool ColorSlider::on_draw(const Cairo::RefPtr<Cairo::Context>& cr) {
+    return false;
+}
+
+}//namespace Widget
+}//namespace UI
+}//namespace Inkscape
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+enum {
+	GRABBED,
+	DRAGGED,
+	RELEASED,
+	CHANGED,
+	LAST_SIGNAL
+};
+
+static void sp_color_slider_class_init (SPColorSliderClass *klass);
+static void sp_color_slider_init (SPColorSlider *slider);
+static void sp_color_slider_dispose(GObject *object);
+
+static void sp_color_slider_realize (GtkWidget *widget);
+static void sp_color_slider_size_request (GtkWidget *widget, GtkRequisition *requisition);
+
+#if GTK_CHECK_VERSION(3,0,0)
+static void sp_color_slider_get_preferred_width(GtkWidget *widget, 
+                                                   gint *minimal_width,
+						   gint *natural_width);
+
+static void sp_color_slider_get_preferred_height(GtkWidget *widget, 
+                                                    gint *minimal_height,
+						    gint *natural_height);
+#else
+static gboolean sp_color_slider_expose(GtkWidget *widget, GdkEventExpose *event);
+#endif
+
+static void sp_color_slider_size_allocate (GtkWidget *widget, GtkAllocation *allocation);
+
+static gboolean sp_color_slider_draw(GtkWidget *widget, cairo_t *cr);
+
+static gint sp_color_slider_button_press (GtkWidget *widget, GdkEventButton *event);
+static gint sp_color_slider_button_release (GtkWidget *widget, GdkEventButton *event);
+static gint sp_color_slider_motion_notify (GtkWidget *widget, GdkEventMotion *event);
+
+static void sp_color_slider_adjustment_changed (GtkAdjustment *adjustment, SPColorSlider *slider);
+static void sp_color_slider_adjustment_value_changed (GtkAdjustment *adjustment, SPColorSlider *slider);
+
+static const guchar *sp_color_slider_render_gradient (gint x0, gint y0, gint width, gint height,
+						      gint c[], gint dc[], guint b0, guint b1, guint mask);
+static const guchar *sp_color_slider_render_map (gint x0, gint y0, gint width, gint height,
+						 guchar *map, gint start, gint step, guint b0, guint b1, guint mask);
+
+static GtkWidgetClass *parent_class;
+static guint slider_signals[LAST_SIGNAL] = {0};
+
+GType
+sp_color_slider_get_type (void)
+{
+	static GType type = 0;
+	if (!type) {
+		GTypeInfo info = {
+			sizeof (SPColorSliderClass),
+			NULL, NULL,
+			(GClassInitFunc) sp_color_slider_class_init,
+			NULL, NULL,
+			sizeof (SPColorSlider),
+			0,
+			(GInstanceInitFunc) sp_color_slider_init,
+			NULL
+		};
+		type = g_type_register_static (GTK_TYPE_WIDGET, "SPColorSlider", &info, (GTypeFlags)0);
+	}
+	return type;
+}
+
+static void sp_color_slider_class_init(SPColorSliderClass *klass)
+{
+	GObjectClass   *object_class = G_OBJECT_CLASS(klass);
+	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
+
+	parent_class = GTK_WIDGET_CLASS(g_type_class_peek_parent(klass));
+
+	slider_signals[GRABBED] = g_signal_new ("grabbed",
+						  G_TYPE_FROM_CLASS(object_class),
+						  (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE),
+						  G_STRUCT_OFFSET (SPColorSliderClass, grabbed),
+						  NULL, NULL,
+						  g_cclosure_marshal_VOID__VOID,
+						  G_TYPE_NONE, 0);
+	slider_signals[DRAGGED] = g_signal_new ("dragged",
+						  G_TYPE_FROM_CLASS(object_class),
+						  (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE),
+						  G_STRUCT_OFFSET (SPColorSliderClass, dragged),
+						  NULL, NULL,
+						  g_cclosure_marshal_VOID__VOID,
+						  G_TYPE_NONE, 0);
+	slider_signals[RELEASED] = g_signal_new ("released",
+						  G_TYPE_FROM_CLASS(object_class),
+						  (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE),
+						  G_STRUCT_OFFSET (SPColorSliderClass, released),
+						  NULL, NULL,
+						  g_cclosure_marshal_VOID__VOID,
+						  G_TYPE_NONE, 0);
+	slider_signals[CHANGED] = g_signal_new ("changed",
+						  G_TYPE_FROM_CLASS(object_class),
+						  (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE),
+						  G_STRUCT_OFFSET (SPColorSliderClass, changed),
+						  NULL, NULL,
+						  g_cclosure_marshal_VOID__VOID,
+						  G_TYPE_NONE, 0);
+
+	object_class->dispose = sp_color_slider_dispose;
+
+	widget_class->realize = sp_color_slider_realize;
+#if GTK_CHECK_VERSION(3,0,0)
+	widget_class->get_preferred_width = sp_color_slider_get_preferred_width;
+	widget_class->get_preferred_height = sp_color_slider_get_preferred_height;
+  	widget_class->draw = sp_color_slider_draw; 
+#else
+	widget_class->size_request = sp_color_slider_size_request;
+	widget_class->expose_event = sp_color_slider_expose;
+#endif
+	widget_class->size_allocate = sp_color_slider_size_allocate;
+/*  	widget_class->draw_focus = sp_color_slider_draw_focus; */
+/*  	widget_class->draw_default = sp_color_slider_draw_default; */
+
+	widget_class->button_press_event = sp_color_slider_button_press;
+	widget_class->button_release_event = sp_color_slider_button_release;
+	widget_class->motion_notify_event = sp_color_slider_motion_notify;
+}
+
+static void
+sp_color_slider_init (SPColorSlider *slider)
+{
+	/* We are widget with window */
+	gtk_widget_set_has_window (GTK_WIDGET(slider), TRUE);
+
+	slider->dragging = FALSE;
+
+	slider->adjustment = NULL;
+	slider->value = 0.0;
+
+	slider->c0[0] = 0x00;
+	slider->c0[1] = 0x00;
+	slider->c0[2] = 0x00;
+	slider->c0[3] = 0xff;
+
+	slider->cm[0] = 0xff;
+	slider->cm[1] = 0x00;
+	slider->cm[2] = 0x00;
+	slider->cm[3] = 0xff;
+
+	slider->c1[0] = 0xff;
+	slider->c1[1] = 0xff;
+	slider->c1[2] = 0xff;
+	slider->c1[3] = 0xff;
+
+	slider->b0 = 0x5f;
+	slider->b1 = 0xa0;
+	slider->bmask = 0x08;
+
+	slider->map = NULL;
+}
+
+static void sp_color_slider_dispose(GObject *object)
+{
+	SPColorSlider *slider = SP_COLOR_SLIDER (object);
+
+	if (slider->adjustment) {
+		g_signal_handlers_disconnect_matched (G_OBJECT (slider->adjustment), G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, slider);
+		g_object_unref (slider->adjustment);
+		slider->adjustment = NULL;
+	}
+
+	if ((G_OBJECT_CLASS(parent_class))->dispose)
+		(* (G_OBJECT_CLASS(parent_class))->dispose) (object);
+}
+
+static void
+sp_color_slider_realize (GtkWidget *widget)
+{
+	GdkWindowAttr attributes;
+	gint attributes_mask;
+	GtkAllocation allocation;
+
+	gtk_widget_get_allocation(widget, &allocation);
+	gtk_widget_set_realized (widget, TRUE);
+
+	attributes.window_type = GDK_WINDOW_CHILD;
+	attributes.x = allocation.x;
+	attributes.y = allocation.y;
+	attributes.width = allocation.width;
+	attributes.height = allocation.height;
+	attributes.wclass = GDK_INPUT_OUTPUT;
+	attributes.visual = gdk_screen_get_system_visual(gdk_screen_get_default());
+
+#if !GTK_CHECK_VERSION(3,0,0)
+	attributes.colormap = gdk_screen_get_system_colormap(gdk_screen_get_default());
+#endif
+
+	attributes.event_mask = gtk_widget_get_events (widget);
+	attributes.event_mask |= (GDK_EXPOSURE_MASK |
+				  GDK_BUTTON_PRESS_MASK |
+				  GDK_BUTTON_RELEASE_MASK |
+				  GDK_POINTER_MOTION_MASK |
+				  GDK_ENTER_NOTIFY_MASK |
+				  GDK_LEAVE_NOTIFY_MASK);
+#if GTK_CHECK_VERSION(3,0,0)
+	attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+#else
+	attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
+#endif
+
+	gtk_widget_set_window(widget, 
+			gdk_window_new(gtk_widget_get_parent_window(widget), 
+				&attributes, attributes_mask));
+
+	gdk_window_set_user_data(gtk_widget_get_window(widget), widget);
+
+#if !GTK_CHECK_VERSION(3,0,0)
+	// This doesn't do anything in GTK+ 3
+	gtk_widget_set_style(widget, 
+                             gtk_style_attach(gtk_widget_get_style(widget), 
+                             gtk_widget_get_window(widget)));
+#endif
+}
+
+static void
+sp_color_slider_size_request (GtkWidget *widget, GtkRequisition *requisition)
+{
+	GtkStyle *style = gtk_widget_get_style(widget);
+	requisition->width = SLIDER_WIDTH + style->xthickness * 2;
+	requisition->height = SLIDER_HEIGHT + style->ythickness * 2;
+}
+
+#if GTK_CHECK_VERSION(3,0,0)
+static void sp_color_slider_get_preferred_width(GtkWidget *widget, gint *minimal_width, gint *natural_width)
+{
+	GtkRequisition requisition;
+	sp_color_slider_size_request(widget, &requisition);
+	*minimal_width = *natural_width = requisition.width;
+}
+
+static void sp_color_slider_get_preferred_height(GtkWidget *widget, gint *minimal_height, gint *natural_height)
+{
+	GtkRequisition requisition;
+	sp_color_slider_size_request(widget, &requisition);
+	*minimal_height = *natural_height = requisition.height;
+}
+#endif
+
+static void
+sp_color_slider_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
+{
+	gtk_widget_set_allocation(widget, allocation);
+
+	if (gtk_widget_get_realized (widget)) {
+		/* Resize GdkWindow */
+		gdk_window_move_resize(gtk_widget_get_window(widget), 
+				allocation->x, allocation->y, 
+				allocation->width, allocation->height);
+	}
+}
+
+#if !GTK_CHECK_VERSION(3,0,0)
+static gboolean sp_color_slider_expose(GtkWidget *widget, GdkEventExpose * /*event*/)
+{
+	gboolean result = FALSE;
+
+	if (gtk_widget_is_drawable(widget)) {
+		GdkWindow *window = gtk_widget_get_window(widget);
+		cairo_t *cr = gdk_cairo_create(window);
+		result = sp_color_slider_draw(widget, cr);
+		cairo_destroy(cr);
+	}
+
+	return result;
+}
+#endif
+
+static gint
+sp_color_slider_button_press (GtkWidget *widget, GdkEventButton *event)
+{
+	SPColorSlider *slider;
+
+	slider = SP_COLOR_SLIDER (widget);
+
+	if (event->button == 1) {
+		GtkAllocation allocation;
+		gtk_widget_get_allocation(widget, &allocation);
+		gint cx, cw;
+		cx = gtk_widget_get_style(widget)->xthickness;
+		cw = allocation.width - 2 * cx;
+		g_signal_emit (G_OBJECT (slider), slider_signals[GRABBED], 0);
+		slider->dragging = TRUE;
+		slider->oldvalue = slider->value;
+		ColorScales::setScaled( slider->adjustment, CLAMP ((gfloat) (event->x - cx) / cw, 0.0, 1.0) );
+		g_signal_emit (G_OBJECT (slider), slider_signals[DRAGGED], 0);
+
+#if GTK_CHECK_VERSION(3,0,0)
+		gdk_device_grab(gdk_event_get_device(reinterpret_cast<GdkEvent *>(event)),
+				gtk_widget_get_window(widget), 
+				GDK_OWNERSHIP_NONE,
+				FALSE,
+				static_cast<GdkEventMask>(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK),
+				NULL,
+				event->time);
+#else		
+		gdk_pointer_grab(gtk_widget_get_window(widget), FALSE,
+				  static_cast<GdkEventMask>(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK),
+				  NULL, NULL, event->time);
+#endif
+	}
+
+	return FALSE;
+}
+
+static gint
+sp_color_slider_button_release (GtkWidget *widget, GdkEventButton *event)
+{
+	SPColorSlider *slider;
+
+	slider = SP_COLOR_SLIDER (widget);
+
+	if (event->button == 1) {
+
+#if GTK_CHECK_VERSION(3,0,0)
+		gdk_device_ungrab(gdk_event_get_device(reinterpret_cast<GdkEvent *>(event)),
+                                  gdk_event_get_time(reinterpret_cast<GdkEvent *>(event)));
+#else
+		gdk_pointer_ungrab (event->time);
+#endif
+
+		slider->dragging = FALSE;
+		g_signal_emit (G_OBJECT (slider), slider_signals[RELEASED], 0);
+		if (slider->value != slider->oldvalue) g_signal_emit (G_OBJECT (slider), slider_signals[CHANGED], 0);
+	}
+
+	return FALSE;
+}
+
+static gint
+sp_color_slider_motion_notify (GtkWidget *widget, GdkEventMotion *event)
+{
+	SPColorSlider *slider;
+
+	slider = SP_COLOR_SLIDER (widget);
+
+	if (slider->dragging) {
+		gint cx, cw;
+		GtkAllocation allocation;
+		gtk_widget_get_allocation(widget, &allocation);
+		cx = gtk_widget_get_style(widget)->xthickness;
+		cw = allocation.width - 2 * cx;
+		ColorScales::setScaled( slider->adjustment, CLAMP ((gfloat) (event->x - cx) / cw, 0.0, 1.0) );
+		g_signal_emit (G_OBJECT (slider), slider_signals[DRAGGED], 0);
+	}
+
+	return FALSE;
+}
+
+GtkWidget *sp_color_slider_new(GtkAdjustment *adjustment)
+{
+	SPColorSlider *slider = SP_COLOR_SLIDER(g_object_new(SP_TYPE_COLOR_SLIDER, NULL));
+
+	sp_color_slider_set_adjustment (slider, adjustment);
+
+	return GTK_WIDGET (slider);
+}
+
+void sp_color_slider_set_adjustment(SPColorSlider *slider, GtkAdjustment *adjustment)
+{
+    g_return_if_fail (slider != NULL);
+    g_return_if_fail (SP_IS_COLOR_SLIDER (slider));
+
+    if (!adjustment) {
+        adjustment = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.01, 0.0, 0.0));
+    } else {
+        gtk_adjustment_set_page_increment(adjustment, 0.0);
+        gtk_adjustment_set_page_size(adjustment, 0.0);
+    }
+
+	if (slider->adjustment != adjustment) {
+		if (slider->adjustment) {
+			g_signal_handlers_disconnect_matched (G_OBJECT (slider->adjustment), G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, slider);
+			g_object_unref (slider->adjustment);
+		}
+
+		slider->adjustment = adjustment;
+		g_object_ref (adjustment);
+		g_object_ref_sink (adjustment);
+
+		g_signal_connect (G_OBJECT (adjustment), "changed",
+				    G_CALLBACK (sp_color_slider_adjustment_changed), slider);
+		g_signal_connect (G_OBJECT (adjustment), "value_changed",
+				    G_CALLBACK (sp_color_slider_adjustment_value_changed), slider);
+
+		slider->value = ColorScales::getScaled( adjustment );
+
+		sp_color_slider_adjustment_changed (adjustment, slider);
+	}
+}
+
+void
+sp_color_slider_set_colors (SPColorSlider *slider, guint32 start, guint32 mid, guint32 end)
+{
+	g_return_if_fail (slider != NULL);
+	g_return_if_fail (SP_IS_COLOR_SLIDER (slider));
+
+        // Remove any map, if set
+        slider->map = 0;
+
+	slider->c0[0] = start >> 24;
+	slider->c0[1] = (start >> 16) & 0xff;
+	slider->c0[2] = (start >> 8) & 0xff;
+	slider->c0[3] = start & 0xff;
+
+	slider->cm[0] = mid >> 24;
+	slider->cm[1] = (mid >> 16) & 0xff;
+	slider->cm[2] = (mid >> 8) & 0xff;
+	slider->cm[3] = mid & 0xff;
+
+	slider->c1[0] = end >> 24;
+	slider->c1[1] = (end >> 16) & 0xff;
+	slider->c1[2] = (end >> 8) & 0xff;
+	slider->c1[3] = end & 0xff;
+
+	gtk_widget_queue_draw (GTK_WIDGET (slider));
+}
+
+void
+sp_color_slider_set_map (SPColorSlider *slider, const guchar *map)
+{
+	g_return_if_fail (slider != NULL);
+	g_return_if_fail (SP_IS_COLOR_SLIDER (slider));
+
+	slider->map = const_cast<guchar *>(map);
+
+	gtk_widget_queue_draw (GTK_WIDGET (slider));
+}
+
+void
+sp_color_slider_set_background (SPColorSlider *slider, guint dark, guint light, guint size)
+{
+	g_return_if_fail (slider != NULL);
+	g_return_if_fail (SP_IS_COLOR_SLIDER (slider));
+
+	slider->b0 = dark;
+	slider->b1 = light;
+	slider->bmask = size;
+
+	gtk_widget_queue_draw (GTK_WIDGET (slider));
+}
+
+static void
+sp_color_slider_adjustment_changed (GtkAdjustment */*adjustment*/, SPColorSlider *slider)
+{
+	gtk_widget_queue_draw (GTK_WIDGET (slider));
+}
+
+static void
+sp_color_slider_adjustment_value_changed (GtkAdjustment *adjustment, SPColorSlider *slider)
+{
+	GtkWidget *widget;
+
+	widget = GTK_WIDGET (slider);
+
+	if (slider->value != ColorScales::getScaled( adjustment )) {
+		gint cx, cy, cw, ch;
+		GtkStyle *style = gtk_widget_get_style(widget);
+		GtkAllocation allocation;
+		gtk_widget_get_allocation(widget, &allocation);
+		cx = style->xthickness;
+		cy = style->ythickness;
+		cw = allocation.width - 2 * cx;
+		ch = allocation.height - 2 * cy;
+		if ((gint) (ColorScales::getScaled( adjustment ) * cw) != (gint) (slider->value * cw)) {
+			gint ax, ay;
+			gfloat value;
+			value = slider->value;
+			slider->value = ColorScales::getScaled( adjustment );
+			ax = (int)(cx + value * cw - ARROW_SIZE / 2 - 2);
+			ay = cy;
+			gtk_widget_queue_draw_area (widget, ax, ay, ARROW_SIZE + 4, ch);
+			ax = (int)(cx + slider->value * cw - ARROW_SIZE / 2 - 2);
+			ay = cy;
+			gtk_widget_queue_draw_area (widget, ax, ay, ARROW_SIZE + 4, ch);
+		} else {
+			slider->value = ColorScales::getScaled( adjustment );
+		}
+	}
+}
+
+static gboolean sp_color_slider_draw(GtkWidget *widget, cairo_t *cr)
+{
+	SPColorSlider *slider = SP_COLOR_SLIDER(widget);
+	
+	gboolean colorsOnTop = Inkscape::Preferences::get()->getBool("/options/workarounds/colorsontop", false);
+	
+	GtkAllocation allocation;
+	gtk_widget_get_allocation(widget, &allocation);
+	
+#if GTK_CHECK_VERSION(3,0,0)
+	GtkStyleContext *context = gtk_widget_get_style_context(widget);
+#else
+	GdkWindow *window = gtk_widget_get_window(widget);
+	GtkStyle *style = gtk_widget_get_style(widget);
+#endif
+
+        // Draw shadow
+        if (colorsOnTop) {
+#if GTK_CHECK_VERSION(3,0,0)
+            gtk_render_frame(context,
+                             cr,
+			     0, 0,
+			     allocation.width, allocation.height);
+#else
+            gtk_paint_shadow( style, window,
+                              gtk_widget_get_state(widget), GTK_SHADOW_IN,
+                              NULL, widget, "colorslider",
+                              0, 0,
+                              allocation.width, allocation.height);
+#endif
+        }
+
+	/* Paintable part of color gradient area */
+	GdkRectangle carea;
+
+#if GTK_CHECK_VERSION(3,0,0)
+	GtkBorder padding;
+	
+	gtk_style_context_get_padding(context,
+                                      gtk_widget_get_state_flags(widget),
+                                      &padding);
+
+	carea.x = padding.left;
+	carea.y = padding.top;
+#else
+	carea.x = style->xthickness;
+	carea.y = style->ythickness;
+#endif
+
+	carea.width = allocation.width - 2 * carea.x;
+	carea.height = allocation.height - 2 * carea.y;
+
+	if (slider->map) {
+		/* Render map pixelstore */
+		gint d = (1024 << 16) / carea.width;
+		gint s = 0;
+
+		const guchar *b = sp_color_slider_render_map(0, 0, carea.width, carea.height,
+                                                             slider->map, s, d,
+                                                             slider->b0, slider->b1, slider->bmask);
+
+		if (b != NULL && carea.width > 0) {
+			GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB,
+					0, 8, carea.width, carea.height, carea.width * 3, NULL, NULL);
+
+			gdk_cairo_set_source_pixbuf(cr, pb, carea.x, carea.y);
+			cairo_paint(cr);
+			g_object_unref(pb);
+		}
+
+	} else {
+		gint c[4], dc[4];
+
+		/* Render gradient */
+
+		// part 1: from c0 to cm
+		if (carea.width > 0) {
+			for (gint i = 0; i < 4; i++) {
+				c[i] = slider->c0[i] << 16;
+				dc[i] = ((slider->cm[i] << 16) - c[i]) / (carea.width/2);
+			}
+			guint wi = carea.width/2;
+			const guchar *b = sp_color_slider_render_gradient(0, 0, wi, carea.height,
+                                                                          c, dc, slider->b0, slider->b1, slider->bmask);
+
+			/* Draw pixelstore 1 */
+			if (b != NULL && wi > 0) {
+				GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB,
+						0, 8, wi, carea.height, wi * 3, NULL, NULL);
+
+				gdk_cairo_set_source_pixbuf(cr, pb, carea.x, carea.y);
+				cairo_paint(cr);
+				g_object_unref(pb);
+			}
+		}
+
+		// part 2: from cm to c1
+ 		if (carea.width > 0) {
+			for (gint i = 0; i < 4; i++) {
+				c[i] = slider->cm[i] << 16;
+				dc[i] = ((slider->c1[i] << 16) - c[i]) / (carea.width/2);
+			}
+			guint wi = carea.width/2;
+			const guchar *b = sp_color_slider_render_gradient(carea.width/2, 0, wi, carea.height,
+					                                  c, dc,
+                                                                          slider->b0, slider->b1, slider->bmask);
+
+			/* Draw pixelstore 2 */
+			if (b != NULL && wi > 0) {
+				GdkPixbuf *pb = gdk_pixbuf_new_from_data (b, GDK_COLORSPACE_RGB,
+						0, 8, wi, carea.height, wi * 3, NULL, NULL);
+
+				gdk_cairo_set_source_pixbuf(cr, pb, carea.width/2 + carea.x, carea.y);
+				cairo_paint(cr);
+
+				g_object_unref(pb);
+			}
+		}
+	}
+
+        /* Draw shadow */
+        if (!colorsOnTop) {
+#if GTK_CHECK_VERSION(3,0,0)
+            gtk_render_frame(context,
+			     cr,
+			     0, 0,
+			     allocation.width, allocation.height);
+#else
+            gtk_paint_shadow( style, window,
+                              gtk_widget_get_state(widget), GTK_SHADOW_IN,
+                              NULL, widget, "colorslider",
+                              0, 0,
+                              allocation.width, allocation.height);
+#endif
+        }
+
+	/* Draw arrow */
+	gint x = (int)(slider->value * (carea.width - 1) - ARROW_SIZE / 2 + carea.x);
+	gint y1 = carea.y;
+	gint y2 = carea.y + carea.height - 1;
+	cairo_set_line_width(cr, 1.0);
+
+	// Define top arrow
+	cairo_move_to(cr, x - 0.5,                y1 + 0.5);
+	cairo_line_to(cr, x + ARROW_SIZE - 0.5,   y1 + 0.5);
+	cairo_line_to(cr, x + (ARROW_SIZE-1)/2.0, y1 + ARROW_SIZE/2.0 + 0.5);
+	cairo_line_to(cr, x - 0.5,                y1 + 0.5);
+
+	// Define bottom arrow
+	cairo_move_to(cr, x - 0.5,                y2 + 0.5);
+	cairo_line_to(cr, x + ARROW_SIZE - 0.5,   y2 + 0.5);
+	cairo_line_to(cr, x + (ARROW_SIZE-1)/2.0, y2 - ARROW_SIZE/2.0 + 0.5);
+	cairo_line_to(cr, x - 0.5,                y2 + 0.5);
+
+	// Render both arrows
+	cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+	cairo_stroke_preserve(cr);
+	cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+	cairo_fill(cr);
+	
+	return FALSE;
+}
+
+/* Colors are << 16 */
+
+static const guchar *
+sp_color_slider_render_gradient (gint x0, gint y0, gint width, gint height,
+				 gint c[], gint dc[], guint b0, guint b1, guint mask)
+{
+	static guchar *buf = NULL;
+	static gint bs = 0;
+	guchar *dp;
+	gint x, y;
+	guint r, g, b, a;
+
+	if (buf && (bs < width * height)) {
+		g_free (buf);
+		buf = NULL;
+	}
+	if (!buf) {
+		buf = g_new (guchar, width * height * 3);
+		bs = width * height;
+	}
+
+	dp = buf;
+	r = c[0];
+	g = c[1];
+	b = c[2];
+	a = c[3];
+	for (x = x0; x < x0 + width; x++) {
+		gint cr, cg, cb, ca;
+		guchar *d;
+		cr = r >> 16;
+		cg = g >> 16;
+		cb = b >> 16;
+		ca = a >> 16;
+		d = dp;
+		for (y = y0; y < y0 + height; y++) {
+			guint bg, fc;
+			/* Background value */
+			bg = ((x & mask) ^ (y & mask)) ? b0 : b1;
+			fc = (cr - bg) * ca;
+			d[0] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			fc = (cg - bg) * ca;
+			d[1] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			fc = (cb - bg) * ca;
+			d[2] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			d += 3 * width;
+		}
+		r += dc[0];
+		g += dc[1];
+		b += dc[2];
+		a += dc[3];
+		dp += 3;
+	}
+
+	return buf;
+}
+
+/* Positions are << 16 */
+
+static const guchar *
+sp_color_slider_render_map (gint x0, gint y0, gint width, gint height,
+			    guchar *map, gint start, gint step, guint b0, guint b1, guint mask)
+{
+	static guchar *buf = NULL;
+	static gint bs = 0;
+	guchar *dp;
+	gint x, y;
+
+	if (buf && (bs < width * height)) {
+		g_free (buf);
+		buf = NULL;
+	}
+	if (!buf) {
+		buf = g_new (guchar, width * height * 3);
+		bs = width * height;
+	}
+
+	dp = buf;
+	for (x = x0; x < x0 + width; x++) {
+		gint cr, cg, cb, ca;
+		guchar *d = dp;
+		guchar *sp = map + 4 * (start >> 16);
+		cr = *sp++;
+		cg = *sp++;
+		cb = *sp++;
+		ca = *sp++;
+		for (y = y0; y < y0 + height; y++) {
+			guint bg, fc;
+			/* Background value */
+			bg = ((x & mask) ^ (y & mask)) ? b0 : b1;
+			fc = (cr - bg) * ca;
+			d[0] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			fc = (cg - bg) * ca;
+			d[1] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			fc = (cb - bg) * ca;
+			d[2] = bg + ((fc + (fc >> 8) + 0x80) >> 8);
+			d += 3 * width;
+		}
+		dp += 3;
+		start += step;
+	}
+
+	return buf;
+}
+
diff --git a/src/ui/widget/color-slider.h b/src/ui/widget/color-slider.h
new file mode 100644
index 000000000..d8be7d111
--- /dev/null
+++ b/src/ui/widget/color-slider.h
@@ -0,0 +1,146 @@
+#ifndef __SP_COLOR_SLIDER_H__
+#define __SP_COLOR_SLIDER_H__
+
+/* Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 2001-2002 Lauris Kaplinski
+ *
+ * This code is in public domain
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if GLIBMM_DISABLE_DEPRECATED && HAVE_GLIBMM_THREADS_H
+#include <glibmm/threads.h>
+#endif
+
+#include <gtkmm/widget.h>
+#include <sigc++/signal.h>
+
+namespace Inkscape
+{
+namespace UI
+{
+namespace Widget
+{
+
+/*
+ * A slider with colored background
+ */
+class ColorSlider: public Gtk::Widget {
+public:
+    //if GTK2
+    ColorSlider(Gtk::Adjustment *adjustment);
+    ~ColorSlider();
+
+    void set_adjustment(Gtk::Adjustment *adjustment);
+
+    void set_colors(guint32 start, guint32 mid, guint32 end);
+
+    void set_map(const guchar* map);
+
+    void set_background(guint dark, guint light, guint size);
+
+    sigc::signal<void> signal_grabbed;
+    sigc::signal<void> signal_dragged;
+    sigc::signal<void> signal_released;
+    sigc::signal<void> signal_value_changed;
+
+protected:
+    void on_size_allocate(Gtk::Allocation& allocation);
+    void on_realize();
+    void on_unrealize();
+    bool on_button_press_event(GdkEventButton *event);
+    bool on_button_release_event(GdkEventButton *event);
+    bool on_motion_notify_event(GdkEventMotion *event);
+
+    //if GTK2
+    void on_size_request(Gtk::Requisition* requisition);
+    bool on_expose_event(GdkEventExpose* event);
+    //if GTK3
+    //request mode, get preffered width/height vfunc
+    //endif
+
+    bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr);
+
+    //TODO: on_adjustment_changed method
+    //TODO: on_adjustment value changed method + connection
+
+private:
+    bool _dragging;
+
+    Gtk::Adjustment *_adjustment;
+
+    gfloat _value;
+    gfloat _oldvalue;
+    guchar _c0[4], _cm[4], _c1[4];
+    guchar _b0, _b1;
+    guchar _bmask;
+
+    gint _mapsize;
+    guchar *_map;
+
+    Glib::RefPtr<Gdk::Window> _refGdkWindow;
+};
+
+}//namespace Widget
+}//namespace UI
+}//namespace Inkscape
+
+
+#include <gtk/gtk.h>
+
+#include <glib.h>
+
+
+
+struct SPColorSlider;
+struct SPColorSliderClass;
+
+#define SP_TYPE_COLOR_SLIDER (sp_color_slider_get_type ())
+#define SP_COLOR_SLIDER(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), SP_TYPE_COLOR_SLIDER, SPColorSlider))
+#define SP_COLOR_SLIDER_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), SP_TYPE_COLOR_SLIDER, SPColorSliderClass))
+#define SP_IS_COLOR_SLIDER(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), SP_TYPE_COLOR_SLIDER))
+#define SP_IS_COLOR_SLIDER_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), SP_TYPE_COLOR_SLIDER))
+
+struct SPColorSlider {
+	GtkWidget widget;
+
+	guint dragging : 1;
+
+	GtkAdjustment *adjustment;
+
+	gfloat value;
+	gfloat oldvalue;
+	guchar c0[4], cm[4], c1[4];
+	guchar b0, b1;
+	guchar bmask;
+
+	gint mapsize;
+	guchar *map;
+};
+
+struct SPColorSliderClass {
+	GtkWidgetClass parent_class;
+
+	void (* grabbed) (SPColorSlider *slider);
+	void (* dragged) (SPColorSlider *slider);
+	void (* released) (SPColorSlider *slider);
+	void (* changed) (SPColorSlider *slider);
+};
+
+GType sp_color_slider_get_type (void);
+
+GtkWidget *sp_color_slider_new (GtkAdjustment *adjustment);
+
+void sp_color_slider_set_adjustment (SPColorSlider *slider, GtkAdjustment *adjustment);
+void sp_color_slider_set_colors (SPColorSlider *slider, guint32 start, guint32 mid, guint32 end);
+void sp_color_slider_set_map (SPColorSlider *slider, const guchar *map);
+void sp_color_slider_set_background (SPColorSlider *slider, guint dark, guint light, guint size);
+
+
+
+#endif