[gtkmm] Widget: Add get/set_clip().

[Murray Cumming <murrayc src gnome org>]

commit e8aadd138109c4d979ae0be4dbdeba089c685709
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Sep 15 21:05:10 2014 +0200

    Widget: Add get/set_clip().

 gtk/src/widget.ccg |    8 ++++++++
 gtk/src/widget.hg  |   15 +++++++++++++++
 2 files changed, 23 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/widget.ccg b/gtk/src/widget.ccg
index 1453189..61510c1 100644
--- a/gtk/src/widget.ccg
+++ b/gtk/src/widget.ccg
@@ -480,6 +480,14 @@ void Widget::set_window(const Glib::RefPtr<Gdk::Window>& window)
     window->reference(); // gtk_widget_set_window does not add a ref.
 }
 
+Allocation Widget::get_clip() const
+{
+  Allocation allocation;
+  gtk_widget_get_clip(const_cast<GtkWidget*>(gobj()), allocation.gobj());
+  return allocation;
+}
+
+
 Allocation Widget::get_allocation() const
 {
   Allocation allocation;
diff --git a/gtk/src/widget.hg b/gtk/src/widget.hg
index 0568db2..8361f98 100644
--- a/gtk/src/widget.hg
+++ b/gtk/src/widget.hg
@@ -292,6 +292,21 @@ public:
 #m4 _CONVERSION(`const Allocation&',`const GdkRectangle*',`($3).gobj()')
   _WRAP_METHOD(void set_allocation(const Allocation& allocation), gtk_widget_set_allocation)
 
+  _WRAP_METHOD(void set_clip(const Allocation& clip), gtk_widget_set_clip)
+  
+  /** Retrieves the widget’s clip area.
+   *
+   * The clip area is the area in which all of the widget's drawing will
+   * happen. Other toolkits call it the bounding box.
+   *
+   * Historically, in GTK+ the clip area has been equal to the allocation
+   * retrieved via get_allocation().
+   *
+   * @newin{3,14}
+   */
+  Allocation get_clip() const;
+  _IGNORE(gtk_widget_get_clip)
+
   _WRAP_METHOD(Container* get_parent(), gtk_widget_get_parent)
   _WRAP_METHOD(const Container* get_parent() const, gtk_widget_get_parent, constversion)