Add some utility functions for dealing with widget hierarchy

[libs/gltk.git] / source / widget.h

diff --git a/source/widget.h b/source/widget.h
index 5c81b8056e6f409641095b2303513a95eff4d3ae..dfef4ba7128be3b1a3e099addc5b7720a943ad8e 100644 (file)
--- a/source/widget.h
+++ b/source/widget.h
@@ -68,6 +68,8 @@ public:
        void set_geometry(const Geometry &);
        const Geometry &get_geometry() const { return geom; }
 
+       void map_coords_to_ancestor(int &, int &, const Widget &) const;
+
 protected:
        /** Sets the widget's parent Container.  The widget must be unparented when
        calling this function with a non-null parameter. */
@@ -75,6 +77,16 @@ protected:
 public:
        Container *get_parent() const { return parent; }
 
+       /** Finds the closest ancestor of a specific type. */
+       template<typename T>
+       T *find_ancestor() const
+       {
+               for(Widget *w=parent; w; w=w->get_parent())
+                       if(T *tw = dynamic_cast<T *>(w))
+                               return tw;
+               return 0;
+       }
+
        /** Sets the widget style.  The name of the resource to be looked up is
        constructed by concatenating the widget class and the style name with a
        dash. */