Merge from trunk

(bzr r9508.1.89)

26 files changed, 423 insertions, 90 deletions

diff --git a/src/ui/widget/CMakeLists.txt b/src/ui/widget/CMakeLists.txt
deleted file mode 100644
index ffc94c299..000000000
--- a/src/ui/widget/CMakeLists.txt
+++ /dev/null
@@ -1,40 +0,0 @@
-SET(ui_widget_SRC
-button.cpp
-color-picker.cpp
-color-preview.cpp
-combo-text.cpp
-dock.cpp
-dock-item.cpp
-entity-entry.cpp
-entry.cpp
-filter-effect-chooser.cpp
-handlebox.cpp
-icon-widget.cpp
-imageicon.cpp
-imagetoggler.cpp
-labelled.cpp
-licensor.cpp
-notebook-page.cpp
-object-composite-settings.cpp
-page-sizer.cpp
-panel.cpp
-point.cpp
-preferences-widget.cpp
-random.cpp
-registered-widget.cpp
-registry.cpp
-rendering-options.cpp
-rotateable.cpp
-ruler.cpp
-scalar.cpp
-scalar-unit.cpp
-selected-style.cpp
-spin-slider.cpp
-style-subject.cpp
-style-swatch.cpp
-svg-canvas.cpp
-tolerance-slider.cpp
-toolbox.cpp
-unit-menu.cpp
-zoom-status.cpp
-)
diff --git a/src/ui/widget/Makefile_insert b/src/ui/widget/Makefile_insert
index b6069631b..bd23b6782 100644
--- a/src/ui/widget/Makefile_insert
+++ b/src/ui/widget/Makefile_insert
@@ -66,6 +66,8 @@ ink_common_sources +=	\
 	ui/widget/scalar.h		\
 	ui/widget/selected-style.h	\
 	ui/widget/selected-style.cpp	\
+	ui/widget/spinbutton.h	\
+	ui/widget/spinbutton.cpp	\
 	ui/widget/spin-slider.h		\
 	ui/widget/spin-slider.cpp	\
 	ui/widget/style-subject.h	\
diff --git a/src/ui/widget/combo-text.cpp b/src/ui/widget/combo-text.cpp
index 7706f7c29..43428adb8 100644
--- a/src/ui/widget/combo-text.cpp
+++ b/src/ui/widget/combo-text.cpp
@@ -23,7 +23,7 @@
 #endif
 
 #include "combo-text.h"
-#include <gtk/gtkcombobox.h>
+#include <gtk/gtk.h>
 
 ComboText::ComboText()
     : Gtk::ComboBox()
diff --git a/src/ui/widget/dock-item.cpp b/src/ui/widget/dock-item.cpp
index 72a20c385..87f4d0840 100644
--- a/src/ui/widget/dock-item.cpp
+++ b/src/ui/widget/dock-item.cpp
@@ -262,7 +262,7 @@ DockItem::present()
 void
 DockItem::grab_focus()
 {
-    if (GTK_WIDGET_REALIZED (_gdl_dock_item)) {
+    if (gtk_widget_get_realized (_gdl_dock_item)) {
 
         // make sure the window we're in is present
         Gtk::Widget *toplevel = getWidget().get_toplevel();
diff --git a/src/ui/widget/entity-entry.cpp b/src/ui/widget/entity-entry.cpp
index e191a9360..e62eb009c 100644
--- a/src/ui/widget/entity-entry.cpp
+++ b/src/ui/widget/entity-entry.cpp
@@ -25,6 +25,7 @@
 #include "sp-object.h"
 #include "rdf.h"
 #include "ui/widget/registry.h"
+#include "sp-root.h"
 
 #include "entity-entry.h"
 
@@ -87,8 +88,8 @@ void EntityLineEntry::update(SPDocument *doc)
 {
     const char *text = rdf_get_work_entity (doc, _entity);
     // If RDF title is not set, get the document's <title> and set the RDF:
-    if ( !text && !strcmp(_entity->name, "title") && doc->root ) {
-        text = doc->root->title();
+    if ( !text && !strcmp(_entity->name, "title") && doc->getRoot() ) {
+        text = doc->getRoot()->title();
         rdf_set_work_entity(doc, _entity, text);
     }
     static_cast<Gtk::Entry*>(_packable)->set_text (text ? text : "");
@@ -133,8 +134,8 @@ void EntityMultiLineEntry::update(SPDocument *doc)
 {
     const char *text = rdf_get_work_entity (doc, _entity);
     // If RDF title is not set, get the document's <title> and set the RDF:
-    if ( !text && !strcmp(_entity->name, "title") && doc->root ) {
-        text = doc->root->title();
+    if ( !text && !strcmp(_entity->name, "title") && doc->getRoot() ) {
+        text = doc->getRoot()->title();
         rdf_set_work_entity(doc, _entity, text);
     }
     Gtk::ScrolledWindow *s = static_cast<Gtk::ScrolledWindow*>(_packable);
diff --git a/src/ui/widget/object-composite-settings.h b/src/ui/widget/object-composite-settings.h
index 76538d6a7..8ef31a889 100644
--- a/src/ui/widget/object-composite-settings.h
+++ b/src/ui/widget/object-composite-settings.h
@@ -17,7 +17,7 @@
 #include <gtkmm/alignment.h>
 #include <gtkmm/adjustment.h>
 #include <gtkmm/label.h>
-#include <gtkmm/spinbutton.h>
+#include "ui/widget/spinbutton.h"
 #include <gtkmm/scale.h>
 
 #include <glibmm/ustring.h>
@@ -47,7 +47,7 @@ private:
     Gtk::Label      _opacity_label;
     Gtk::Adjustment _opacity_adjustment;
     Gtk::HScale     _opacity_hscale;
-    Gtk::SpinButton _opacity_spin_button;
+    Inkscape::UI::Widget::SpinButton _opacity_spin_button;
 
     StyleSubject *_subject;
 
diff --git a/src/ui/widget/page-sizer.cpp b/src/ui/widget/page-sizer.cpp
index f306b9eea..672e1415b 100644
--- a/src/ui/widget/page-sizer.cpp
+++ b/src/ui/widget/page-sizer.cpp
@@ -422,7 +422,7 @@ PageSizer::setDim (double w, double h, bool changeList)
         // The origin for the user is in the lower left corner; this point should remain stationary when
         // changing the page size. The SVG's origin however is in the upper left corner, so we must compensate for this
         Geom::Translate const vert_offset(Geom::Point(0, (old_height - h)));
-        SP_GROUP(SP_ROOT(doc->root))->translateChildItems(vert_offset);
+        doc->getRoot()->translateChildItems(vert_offset);
         DocumentUndo::done(doc, SP_VERB_NONE, _("Set page size"));
     }
 
diff --git a/src/ui/widget/panel.cpp b/src/ui/widget/panel.cpp
index b3c8ce376..3e0c27587 100644
--- a/src/ui/widget/panel.cpp
+++ b/src/ui/widget/panel.cpp
@@ -22,7 +22,7 @@
 #include <gtkmm/dialog.h> // for Gtk::RESPONSE_*
 #include <gtkmm/stock.h>
 
-#include <gtk/gtkiconfactory.h>
+#include <gtk/gtk.h>
 
 #include "panel.h"
 #include "icon-size.h"
diff --git a/src/ui/widget/preferences-widget.cpp b/src/ui/widget/preferences-widget.cpp
index afcaa338e..68faa3c66 100644
--- a/src/ui/widget/preferences-widget.cpp
+++ b/src/ui/widget/preferences-widget.cpp
@@ -227,7 +227,6 @@ void PrefSpinButton::init(Glib::ustring const &prefs_path,
 
     this->set_range (lower, upper);
     this->set_increments (step_increment, 0);
-    this->set_numeric();
     this->set_value (value);
     this->set_width_chars(6);
     if (is_int)
@@ -256,6 +255,45 @@ void PrefSpinButton::on_value_changed()
     }
 }
 
+void PrefSpinUnit::init(Glib::ustring const &prefs_path,
+              double lower, double upper, double step_increment,
+              double default_value, UnitType unit_type, Glib::ustring const &default_unit)
+{
+    _prefs_path = prefs_path;
+    _is_percent = (unit_type == UNIT_TYPE_DIMENSIONLESS);
+
+    resetUnitType(unit_type);
+    setUnit(default_unit);
+    setRange (lower, upper); /// @fixme  this disregards changes of units
+    setIncrements (step_increment, 0);
+    if (step_increment < 0.1) {
+        setDigits(4);
+    } else {
+        setDigits(2);
+    }
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    double value = prefs->getDoubleLimited(prefs_path, default_value, lower, upper);
+    Glib::ustring unitstr = prefs->getUnit(prefs_path);
+    if (unitstr.length() == 0) {
+        unitstr = default_unit;
+        // write the assumed unit to preferences:
+        prefs->setDoubleUnit(_prefs_path, value, unitstr);
+    }
+    setValue(value, unitstr);
+
+    signal_value_changed().connect_notify(sigc::mem_fun(*this, &PrefSpinUnit::on_my_value_changed));
+}
+
+void PrefSpinUnit::on_my_value_changed()
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (getWidget()->is_visible()) //only take action if user changed value
+    {
+        prefs->setDoubleUnit(_prefs_path, getValue(getUnit().abbr), getUnit().abbr);
+    }
+}
+
 const double ZoomCorrRuler::textsize = 7;
 const double ZoomCorrRuler::textpadding = 5;
 
diff --git a/src/ui/widget/preferences-widget.h b/src/ui/widget/preferences-widget.h
index 6c7f9ce4a..6caab11ae 100644
--- a/src/ui/widget/preferences-widget.h
+++ b/src/ui/widget/preferences-widget.h
@@ -17,7 +17,7 @@
 #include <vector>
 #include <gtkmm/table.h>
 #include <gtkmm/comboboxtext.h>
-#include <gtkmm/spinbutton.h>
+#include "ui/widget/spinbutton.h"
 #include <gtkmm/tooltips.h>
 #include <gtkmm/treeview.h>
 #include <gtkmm/radiobutton.h>
@@ -32,6 +32,8 @@
 
 #include "ui/widget/color-picker.h"
 #include "ui/widget/unit-menu.h"
+#include "ui/widget/spinbutton.h"
+#include "ui/widget/scalar-unit.h"
 
 namespace Inkscape {
 namespace UI {
@@ -68,7 +70,7 @@ protected:
     void on_toggled();
 };
 
-class PrefSpinButton : public Gtk::SpinButton
+class PrefSpinButton : public SpinButton
 {
 public:
     void init(Glib::ustring const &prefs_path,
@@ -81,6 +83,21 @@ protected:
     void on_value_changed();
 };
 
+class PrefSpinUnit : public ScalarUnit
+{
+public:
+    PrefSpinUnit() : ScalarUnit("", "") {};
+
+    void init(Glib::ustring const &prefs_path,
+              double lower, double upper, double step_increment,
+              double default_value,
+              UnitType unit_type, Glib::ustring const &default_unit);
+protected:
+    Glib::ustring _prefs_path;
+    bool _is_percent;
+    void on_my_value_changed();
+};
+
 class ZoomCorrRuler : public Gtk::DrawingArea {
 public:
     ZoomCorrRuler(int width = 100, int height = 20);
@@ -116,7 +133,7 @@ private:
     void on_spinbutton_value_changed();
     void on_unit_changed();
 
-    Gtk::SpinButton _sb;
+    Inkscape::UI::Widget::SpinButton _sb;
     UnitMenu        _unit;
     Gtk::HScale     _slider;
     ZoomCorrRuler   _ruler;
@@ -134,7 +151,7 @@ private:
     void on_spinbutton_value_changed();
     
     Glib::ustring _prefs_path;
-    Gtk::SpinButton _sb;
+    Inkscape::UI::Widget::SpinButton _sb;
     Gtk::HScale     _slider;
     bool freeze; // used to block recursive updates of slider and spinbutton
 };
diff --git a/src/ui/widget/random.cpp b/src/ui/widget/random.cpp
index 02201be12..3dcf09cb5 100644
--- a/src/ui/widget/random.cpp
+++ b/src/ui/widget/random.cpp
@@ -25,6 +25,8 @@
 
 #include <glibmm/i18n.h>
 
+#include <gtkmm/button.h>
+
 namespace Inkscape {
 namespace UI {
 namespace Widget {
diff --git a/src/ui/widget/ruler.cpp b/src/ui/widget/ruler.cpp
index a220a54ad..c6ac3a381 100644
--- a/src/ui/widget/ruler.cpp
+++ b/src/ui/widget/ruler.cpp
@@ -108,7 +108,7 @@ Ruler::on_button_press_event(GdkEventButton *evb)
         _dragging = true;
         sp_repr_set_boolean(repr, "showguides", TRUE);
         sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
-        _guide = sp_guideline_new(_dt->guides, event_dt, _horiz_f ? Geom::Point(0.,1.) : Geom::Point(1.,0.));
+        _guide = sp_guideline_new(_dt->guides, NULL, event_dt, _horiz_f ? Geom::Point(0.,1.) : Geom::Point(1.,0.));
         sp_guideline_set_color(SP_GUIDELINE(_guide), _dt->namedview->guidehicolor);
         (void) get_window()->pointer_grab(false,
                         Gdk::BUTTON_RELEASE_MASK |
diff --git a/src/ui/widget/scalar-unit.cpp b/src/ui/widget/scalar-unit.cpp
index 6209d40e0..1c0fdff68 100644
--- a/src/ui/widget/scalar-unit.cpp
+++ b/src/ui/widget/scalar-unit.cpp
@@ -27,6 +27,7 @@
 #endif
 
 #include "scalar-unit.h"
+#include "spinbutton.h"
 
 namespace Inkscape {
 namespace UI {
@@ -65,9 +66,45 @@ ScalarUnit::ScalarUnit(Glib::ustring const &label, Glib::ustring const &tooltip,
     }
     _unit_menu->signal_changed()
             .connect_notify(sigc::mem_fun(*this, &ScalarUnit::on_unit_changed));
+
+    static_cast<SpinButton*>(_widget)->setUnitMenu(_unit_menu);
+
+    lastUnits = _unit_menu->getUnitAbbr();
 }
 
 /**
+ * Construct a ScalarUnit
+ *
+ * \param label      Label.
+ * \param tooltip    Tooltip text.
+ * \param take_unitmenu  Use the unitmenu from this parameter.
+ * \param suffix     Suffix, placed after the widget (defaults to "").
+ * \param icon       Icon filename, placed before the label (defaults to "").
+ * \param mnemonic   Mnemonic toggle; if true, an underscore (_) in the label
+ *                   indicates the next character should be used for the
+ *                   mnemonic accelerator key (defaults to true).
+ */
+ScalarUnit::ScalarUnit(Glib::ustring const &label, Glib::ustring const &tooltip,
+                       ScalarUnit &take_unitmenu,
+                       Glib::ustring const &suffix,
+                       Glib::ustring const &icon,
+                       bool mnemonic)
+    : Scalar(label, tooltip, suffix, icon, mnemonic),
+      _unit_menu(take_unitmenu._unit_menu),
+      _hundred_percent(0),
+      _absolute_is_increment(false),
+      _percentage_is_increment(false)
+{
+    _unit_menu->signal_changed()
+            .connect_notify(sigc::mem_fun(*this, &ScalarUnit::on_unit_changed));
+
+    static_cast<SpinButton*>(_widget)->setUnitMenu(_unit_menu);
+
+    lastUnits = _unit_menu->getUnitAbbr();
+}
+
+
+/**
  * Initializes the scalar based on the settings in _unit_menu.
  * Requires that _unit_menu has already been initialized.
  */
@@ -93,6 +130,22 @@ ScalarUnit::setUnit(Glib::ustring const &unit) {
     return true;
 }
 
+/** Adds the unit type to the ScalarUnit widget */
+void
+ScalarUnit::setUnitType(UnitType unit_type) {
+    g_assert(_unit_menu != NULL);
+    _unit_menu->setUnitType(unit_type);
+    lastUnits = _unit_menu->getUnitAbbr();
+}
+
+/** Resets the unit type for the ScalarUnit widget */
+void
+ScalarUnit::resetUnitType(UnitType unit_type) {
+    g_assert(_unit_menu != NULL);
+    _unit_menu->resetUnitType(unit_type);
+    lastUnits = _unit_menu->getUnitAbbr();
+}
+
 /** Gets the object for the currently selected unit */
 Unit
 ScalarUnit::getUnit() const {
@@ -115,6 +168,19 @@ ScalarUnit::setValue(double number, Glib::ustring const &units) {
     Scalar::setValue(number);
 }
 
+/** Convert and sets the number only and keeps the current unit.  */
+void
+ScalarUnit::setValueKeepUnit(double number, Glib::ustring const &units) {
+    g_assert(_unit_menu != NULL);
+    if (units == "") {
+        // set the value in the default units
+        Scalar::setValue(number);
+    } else {
+        double conversion = _unit_menu->getConversion(units);
+        Scalar::setValue(number / conversion);
+    }
+}
+
 /** Sets the number only */
 void
 ScalarUnit::setValue(double number) {
@@ -134,6 +200,15 @@ ScalarUnit::getValue(Glib::ustring const &unit_name) const {
     }
 }
 
+/** Grab focus, and select the text that is in the entry field.
+ */
+void
+ScalarUnit::grabFocusAndSelectEntry() {
+    _widget->grab_focus();
+    static_cast<SpinButton*>(_widget)->select_region(0, 20);
+}
+
+
 void
 ScalarUnit::setHundredPercent(double number)
 {
diff --git a/src/ui/widget/scalar-unit.h b/src/ui/widget/scalar-unit.h
index d8b2edbd5..ed3728e69 100644
--- a/src/ui/widget/scalar-unit.h
+++ b/src/ui/widget/scalar-unit.h
@@ -32,6 +32,11 @@ public:
                Glib::ustring const &icon = "",
                UnitMenu *unit_menu = NULL,
                bool mnemonic = true);
+    ScalarUnit(Glib::ustring const &label, Glib::ustring const &tooltip,
+               ScalarUnit &take_unitmenu,
+               Glib::ustring const &suffix = "",
+               Glib::ustring const &icon = "",
+               bool mnemonic = true);
 
     void      initScalar(double min_value, double max_value);
 
@@ -40,9 +45,14 @@ public:
     double    getValue(Glib::ustring const &units) const;
 
     bool      setUnit(Glib::ustring const &units);
+    void      setUnitType(UnitType unit_type);
+    void      resetUnitType(UnitType unit_type);
     void      setValue(double number, Glib::ustring const &units);
+    void      setValueKeepUnit(double number, Glib::ustring const &units);
     void      setValue(double number);
 
+    void      grabFocusAndSelectEntry();
+
     void      setHundredPercent(double number);
     void      setAbsoluteIsIncrement(bool value);
     void      setPercentageIsIncrement(bool value);
diff --git a/src/ui/widget/scalar.cpp b/src/ui/widget/scalar.cpp
index 26a1f6541..6ada379fb 100644
--- a/src/ui/widget/scalar.cpp
+++ b/src/ui/widget/scalar.cpp
@@ -18,6 +18,7 @@
 
 
 #include "scalar.h"
+#include "spinbutton.h"
 
 namespace Inkscape {
 namespace UI {
@@ -37,10 +38,9 @@ Scalar::Scalar(Glib::ustring const &label, Glib::ustring const &tooltip,
                Glib::ustring const &suffix,
                Glib::ustring const &icon,
                bool mnemonic)
-    : Labelled(label, tooltip, new Gtk::SpinButton(), suffix, icon, mnemonic),
+    : Labelled(label, tooltip, new SpinButton(), suffix, icon, mnemonic),
       setProgrammatically(false)
 {
-    static_cast<Gtk::SpinButton*>(_widget)->set_numeric();
 }
 
 /**
@@ -59,10 +59,9 @@ Scalar::Scalar(Glib::ustring const &label, Glib::ustring const &tooltip,
                Glib::ustring const &suffix,
                Glib::ustring const &icon,
                bool mnemonic)
-    : Labelled(label, tooltip, new Gtk::SpinButton(0.0, digits), suffix, icon, mnemonic),
+    : Labelled(label, tooltip, new SpinButton(0.0, digits), suffix, icon, mnemonic),
       setProgrammatically(false)
 {
-    static_cast<Gtk::SpinButton*>(_widget)->set_numeric();
 }
 
 /**
@@ -83,10 +82,9 @@ Scalar::Scalar(Glib::ustring const &label, Glib::ustring const &tooltip,
                Glib::ustring const &suffix,
                Glib::ustring const &icon,
                bool mnemonic)
-    : Labelled(label, tooltip, new Gtk::SpinButton(adjust, 0.0, digits), suffix, icon, mnemonic),
+    : Labelled(label, tooltip, new SpinButton(adjust, 0.0, digits), suffix, icon, mnemonic),
       setProgrammatically(false)
 {
-    static_cast<Gtk::SpinButton*>(_widget)->set_numeric();
 }
 
 /** Fetches the precision of the spin buton */
@@ -94,7 +92,7 @@ unsigned
 Scalar::getDigits() const
 {
     g_assert(_widget != NULL);
-    return static_cast<Gtk::SpinButton*>(_widget)->get_digits();
+    return static_cast<SpinButton*>(_widget)->get_digits();
 }
 
 /** Gets the current step ingrement used by the spin button */
@@ -103,7 +101,7 @@ Scalar::getStep() const
 {
     g_assert(_widget != NULL);
     double step, page;
-    static_cast<Gtk::SpinButton*>(_widget)->get_increments(step, page);
+    static_cast<SpinButton*>(_widget)->get_increments(step, page);
     return step;
 }
 
@@ -113,7 +111,7 @@ Scalar::getPage() const
 {
     g_assert(_widget != NULL);
     double step, page;
-    static_cast<Gtk::SpinButton*>(_widget)->get_increments(step, page);
+    static_cast<SpinButton*>(_widget)->get_increments(step, page);
     return page;
 }
 
@@ -123,7 +121,7 @@ Scalar::getRangeMin() const
 {
     g_assert(_widget != NULL);
     double min, max;
-    static_cast<Gtk::SpinButton*>(_widget)->get_range(min, max);
+    static_cast<SpinButton*>(_widget)->get_range(min, max);
     return min;
 }
 
@@ -133,7 +131,7 @@ Scalar::getRangeMax() const
 {
     g_assert(_widget != NULL);
     double min, max;
-    static_cast<Gtk::SpinButton*>(_widget)->get_range(min, max);
+    static_cast<SpinButton*>(_widget)->get_range(min, max);
     return max;
 }
 
@@ -142,7 +140,7 @@ double
 Scalar::getValue() const
 {
     g_assert(_widget != NULL);
-    return static_cast<Gtk::SpinButton*>(_widget)->get_value();
+    return static_cast<SpinButton*>(_widget)->get_value();
 }
 
 /** Get the value spin_button represented as an integer. */
@@ -150,7 +148,7 @@ int
 Scalar::getValueAsInt() const
 {
     g_assert(_widget != NULL);
-    return static_cast<Gtk::SpinButton*>(_widget)->get_value_as_int();
+    return static_cast<SpinButton*>(_widget)->get_value_as_int();
 }
 
 
@@ -159,7 +157,7 @@ void
 Scalar::setDigits(unsigned digits)
 {
     g_assert(_widget != NULL);
-    static_cast<Gtk::SpinButton*>(_widget)->set_digits(digits);
+    static_cast<SpinButton*>(_widget)->set_digits(digits);
 }
 
 /** Sets the step and page increments for the spin button
@@ -169,7 +167,7 @@ void
 Scalar::setIncrements(double step, double /*page*/)
 {
     g_assert(_widget != NULL);
-    static_cast<Gtk::SpinButton*>(_widget)->set_increments(step, 0);
+    static_cast<SpinButton*>(_widget)->set_increments(step, 0);
 }
 
 /** Sets the minimum and maximum range allowed for the spin button */
@@ -177,7 +175,7 @@ void
 Scalar::setRange(double min, double max)
 {
     g_assert(_widget != NULL);
-    static_cast<Gtk::SpinButton*>(_widget)->set_range(min, max);
+    static_cast<SpinButton*>(_widget)->set_range(min, max);
 }
 
 /** Sets the value of the spin button */
@@ -186,14 +184,14 @@ Scalar::setValue(double value)
 {
     g_assert(_widget != NULL);
     setProgrammatically = true; // callback is supposed to reset back, if it cares
-    static_cast<Gtk::SpinButton*>(_widget)->set_value(value);
+    static_cast<SpinButton*>(_widget)->set_value(value);
 }
 
 /** Manually forces an update of the spin button */
 void
 Scalar::update() {
     g_assert(_widget != NULL);
-    static_cast<Gtk::SpinButton*>(_widget)->update();
+    static_cast<SpinButton*>(_widget)->update();
 }
 
 
@@ -202,7 +200,7 @@ Scalar::update() {
 Glib::SignalProxy0<void>
 Scalar::signal_value_changed()
 {
-    return static_cast<Gtk::SpinButton*>(_widget)->signal_value_changed();
+    return static_cast<SpinButton*>(_widget)->signal_value_changed();
 }
 
 
diff --git a/src/ui/widget/scalar.h b/src/ui/widget/scalar.h
index 6de128edb..7142ba93f 100644
--- a/src/ui/widget/scalar.h
+++ b/src/ui/widget/scalar.h
@@ -15,9 +15,6 @@
 #ifndef INKSCAPE_UI_WIDGET_SCALAR_H
 #define INKSCAPE_UI_WIDGET_SCALAR_H
 
-#include <gtkmm/adjustment.h>
-#include <gtkmm/spinbutton.h>
-
 #include "labelled.h"
 
 namespace Inkscape {
diff --git a/src/ui/widget/selected-style.cpp b/src/ui/widget/selected-style.cpp
index 50476dc65..ae8cd564e 100644
--- a/src/ui/widget/selected-style.cpp
+++ b/src/ui/widget/selected-style.cpp
@@ -14,7 +14,7 @@
 # include <config.h>
 #endif
 
-#include <gtk/gtkdnd.h>
+#include <gtk/gtk.h>
 
 #include "selected-style.h"
 
diff --git a/src/ui/widget/selected-style.h b/src/ui/widget/selected-style.h
index e74d5b1ae..0caa7fe4c 100644
--- a/src/ui/widget/selected-style.h
+++ b/src/ui/widget/selected-style.h
@@ -21,7 +21,7 @@
 #include <gtkmm/menu.h>
 #include <gtkmm/menuitem.h>
 #include <gtkmm/adjustment.h>
-#include <gtkmm/spinbutton.h>
+#include "ui/widget/spinbutton.h"
 
 #include <stddef.h>
 #include <sigc++/sigc++.h>
@@ -138,7 +138,7 @@ protected:
 
     Gtk::EventBox _opacity_place;
     Gtk::Adjustment _opacity_adjustment;
-    Gtk::SpinButton _opacity_sb;
+    Inkscape::UI::Widget::SpinButton _opacity_sb;
 
     Gtk::Label _na[2];
     Glib::ustring __na[2];
diff --git a/src/ui/widget/spin-slider.cpp b/src/ui/widget/spin-slider.cpp
index faafc63b4..259b057aa 100644
--- a/src/ui/widget/spin-slider.cpp
+++ b/src/ui/widget/spin-slider.cpp
@@ -90,11 +90,11 @@ Gtk::HScale& SpinSlider::get_scale()
     return _scale;
 }
 
-const Gtk::SpinButton& SpinSlider::get_spin_button() const
+const Inkscape::UI::Widget::SpinButton& SpinSlider::get_spin_button() const
 {
     return _spin;
 }
-Gtk::SpinButton& SpinSlider::get_spin_button()
+Inkscape::UI::Widget::SpinButton& SpinSlider::get_spin_button()
 {
     return _spin;
 }
diff --git a/src/ui/widget/spin-slider.h b/src/ui/widget/spin-slider.h
index a4d0aa9d6..703c5d896 100644
--- a/src/ui/widget/spin-slider.h
+++ b/src/ui/widget/spin-slider.h
@@ -15,7 +15,7 @@
 #include <gtkmm/adjustment.h>
 #include <gtkmm/box.h>
 #include <gtkmm/scale.h>
-#include <gtkmm/spinbutton.h>
+#include "spinbutton.h"
 #include "attr-widget.h"
 
 namespace Inkscape {
@@ -42,8 +42,8 @@ public:
     const Gtk::HScale& get_scale() const;
     Gtk::HScale& get_scale();
 
-    const Gtk::SpinButton& get_spin_button() const;
-    Gtk::SpinButton& get_spin_button();
+    const Inkscape::UI::Widget::SpinButton& get_spin_button() const;
+    Inkscape::UI::Widget::SpinButton& get_spin_button();
 
     void set_update_policy(const Gtk::UpdateType);
 
@@ -52,7 +52,7 @@ public:
 private:
     Gtk::Adjustment _adjustment;
     Gtk::HScale _scale;
-    Gtk::SpinButton _spin;
+    Inkscape::UI::Widget::SpinButton _spin;
 };
 
 // Contains two SpinSliders for controlling number-opt-number attributes
diff --git a/src/ui/widget/spinbutton.cpp b/src/ui/widget/spinbutton.cpp
new file mode 100644
index 000000000..32090f96c
--- /dev/null
+++ b/src/ui/widget/spinbutton.cpp
@@ -0,0 +1,129 @@
+/**
+ * \brief SpinButton widget, that allows entry of both '.' and ',' for the decimal, even when in numeric mode.
+ */
+/*
+ * Author:
+ *   Johan B. C. Engelen
+ *
+ * Copyright (C) 2011 Author
+ *
+ * Released under GNU GPL.  Read the file 'COPYING' for more information.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "spinbutton.h"
+
+#include "unit-menu.h"
+#include "util/expression-evaluator.h"
+#include "event-context.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+
+void
+SpinButton::connect_signals() {
+    signal_input().connect(sigc::mem_fun(*this, &SpinButton::on_input));
+    signal_focus_in_event().connect(sigc::mem_fun(*this, &SpinButton::on_my_focus_in_event));
+    signal_key_press_event().connect(sigc::mem_fun(*this, &SpinButton::on_my_key_press_event));
+};
+
+/**
+ * This callback function should try to convert the entered text to a number and write it to newvalue.
+ * It calls a method to evaluate the (potential) mathematical expression.
+ *
+ * @retval false No conversion done, continue with default handler.
+ * @retval true  Conversion successful, don't call default handler. 
+ */
+int
+SpinButton::on_input(double* newvalue)
+{
+    try {
+        Inkscape::Util::GimpEevlQuantity result;
+        if (_unit_menu) {
+            Unit unit = _unit_menu->getUnit();
+            result = Inkscape::Util::gimp_eevl_evaluate (get_text().c_str(), &unit);
+            // check if output dimension corresponds to input unit
+            if (result.dimension != (unit.isAbsolute() ? 1 : 0) ) {
+                throw Inkscape::Util::EvaluatorException("Input dimensions do not match with parameter dimensions.","");
+            }
+        } else {
+            result = Inkscape::Util::gimp_eevl_evaluate (get_text().c_str(), NULL);
+        }
+
+        *newvalue = result.value;
+    }
+    catch(Inkscape::Util::EvaluatorException &e) {
+        g_message ("%s", e.what());
+
+        return false;
+    }
+
+    return true;
+}
+
+/** When focus is obtained, save the value to enable undo later.
+ * @retval false continue with default handler.
+ * @retval true  don't call default handler. 
+*/
+bool
+SpinButton::on_my_focus_in_event(GdkEventFocus* /*event*/)
+{
+    on_focus_in_value = get_value();
+    return false; // do not consume the event
+}
+
+/** Handle specific keypress events, like Ctrl+Z
+ * @retval false continue with default handler.
+ * @retval true  don't call default handler. 
+*/
+bool
+SpinButton::on_my_key_press_event(GdkEventKey* event)
+{
+    switch (get_group0_keyval (event)) {
+    case GDK_Escape:
+        undo();
+        return true; // I consumed the event
+        break;
+    case GDK_z:
+    case GDK_Z:
+        if (event->state & GDK_CONTROL_MASK) {
+            undo();
+            return true; // I consumed the event
+        }
+        break;
+    default:
+        break;
+    }
+
+    return false; // do not consume the event
+}
+
+/**
+ * Undo the editing, by resetting the value upon when the spinbutton got focus.
+ */
+void
+SpinButton::undo()
+{
+    set_value(on_focus_in_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/spinbutton.h b/src/ui/widget/spinbutton.h
new file mode 100644
index 000000000..df913553d
--- /dev/null
+++ b/src/ui/widget/spinbutton.h
@@ -0,0 +1,81 @@
+/**
+ * \brief SpinButton widget, that allows entry of both '.' and ',' for the decimal, even when in numeric mode.
+ */
+/*
+ * Author:
+ *   Johan B. C. Engelen
+ *
+ * Copyright (C) 2011 Author
+ *
+ * Released under GNU GPL.  Read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_SPINBUTTON_H
+#define INKSCAPE_UI_WIDGET_SPINBUTTON_H
+
+#include <gtkmm/spinbutton.h>
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+class UnitMenu;
+
+/**
+ * SpinButton widget, that allows entry of simple math expressions (also units, when linked with UnitMenu).
+ *
+ * Calling "set_numeric()" effectively disables the expression parsing. If no unit menu is linked, all unitlike characters are ignored.
+ */
+class SpinButton : public Gtk::SpinButton
+{
+public:
+  SpinButton(double climb_rate = 0.0, guint digits = 0)
+    : Gtk::SpinButton(climb_rate, digits),
+      _unit_menu(NULL)
+  {
+      connect_signals();
+  };
+  explicit SpinButton(Gtk::Adjustment& adjustment, double climb_rate = 0.0, guint digits = 0)
+    : Gtk::SpinButton(adjustment, climb_rate, digits),
+      _unit_menu(NULL)
+  {
+      connect_signals();
+  };
+
+  virtual ~SpinButton() {};
+
+  void setUnitMenu(UnitMenu* unit_menu) { _unit_menu = unit_menu; };
+
+protected:
+  UnitMenu *_unit_menu; /// Linked unit menu for unit conversion in entered expressions.
+
+  void connect_signals();
+  int on_input(double* newvalue);
+  bool on_my_focus_in_event(GdkEventFocus* event);
+  bool on_my_key_press_event(GdkEventKey* event);
+  void undo();
+
+  double on_focus_in_value;
+
+private:
+  // noncopyable
+  SpinButton(const SpinButton&);
+  SpinButton& operator=(const SpinButton&);
+};
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_WIDGET_SPINBUTTON_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 :
diff --git a/src/ui/widget/toolbox.cpp b/src/ui/widget/toolbox.cpp
index e90a58b6e..5e5f43263 100644
--- a/src/ui/widget/toolbox.cpp
+++ b/src/ui/widget/toolbox.cpp
@@ -14,7 +14,7 @@
 #endif
 
 #include <gtkmm/radioaction.h>
-#include <gtk/gtkmain.h>
+#include <gtk/gtk.h>
 #include "ui/widget/toolbox.h"
 #include "path-prefix.h"
 
diff --git a/src/ui/widget/unit-menu.cpp b/src/ui/widget/unit-menu.cpp
index b4271762c..362f5d90f 100644
--- a/src/ui/widget/unit-menu.cpp
+++ b/src/ui/widget/unit-menu.cpp
@@ -54,6 +54,27 @@ UnitMenu::setUnitType(UnitType unit_type)
     return true;
 }
 
+/** Removes all unit entries, then adds the unit type to the widget.
+    This extracts the corresponding
+    units from the unit map matching the given type, and appends them
+    to the dropdown widget.  It causes the primary unit for the given
+    unit_type to be selected.  */
+bool
+UnitMenu::resetUnitType(UnitType unit_type) 
+{
+    clear_text();
+
+    return setUnitType(unit_type);
+}
+
+/** Adds a unit, possibly user-defined, to the menu. */
+void
+UnitMenu::addUnit(Unit const& u)
+{
+    _unit_table.addUnit(u, false);
+    append_text(u.abbr);
+}
+
 /** Returns the Unit object corresponding to the current selection
     in the dropdown widget */
 Unit
diff --git a/src/ui/widget/unit-menu.h b/src/ui/widget/unit-menu.h
index 60a9702b4..cf42231ba 100644
--- a/src/ui/widget/unit-menu.h
+++ b/src/ui/widget/unit-menu.h
@@ -28,6 +28,8 @@ public:
     virtual ~UnitMenu();
 
     bool          setUnitType(UnitType unit_type);
+    bool          resetUnitType(UnitType unit_type);
+    void          addUnit(Unit const& u);
 
     bool          setUnit(Glib::ustring const &unit);
 
diff --git a/src/ui/widget/zoom-status.h b/src/ui/widget/zoom-status.h
index 58d595329..85c3eeee1 100644
--- a/src/ui/widget/zoom-status.h
+++ b/src/ui/widget/zoom-status.h
@@ -13,7 +13,7 @@
  */
 
 #include <gtkmm/adjustment.h>
-#include <gtkmm/spinbutton.h>
+#include "ui/widget/spinbutton.h"
 
 struct SPDesktop;
 
@@ -22,7 +22,7 @@ namespace Inkscape {
     namespace UI {
         namespace Widget {
 
-class ZoomStatus : public Gtk::SpinButton
+class ZoomStatus : public Inkscape::UI::Widget::SpinButton
 {
 public:
     ZoomStatus();