canvas::Text: add heightForWidth method.

[simgear.git] / simgear / canvas / layout / NasalWidget.hxx

diff --git a/simgear/canvas/layout/NasalWidget.hxx b/simgear/canvas/layout/NasalWidget.hxx
index e07ffb5389d034a6099e1151b771ef0f970695de..1fc4446a1cdd1e961d6b11b41a70a49b453ef3f5 100644 (file)
--- a/simgear/canvas/layout/NasalWidget.hxx
+++ b/simgear/canvas/layout/NasalWidget.hxx
@@ -40,6 +40,7 @@ namespace canvas
     public:
 
       typedef boost::function<void (nasal::Me, const SGRecti&)> SetGeometryFunc;
+      typedef boost::function<int (nasal::Me, int)> HeightForWidthFunc;
 
       /**
        *
@@ -51,11 +52,17 @@ namespace canvas
       virtual void setGeometry(const SGRecti& geom);
 
       void setSetGeometryFunc(const SetGeometryFunc& func);
+      void setHeightForWidthFunc(const HeightForWidthFunc& func);
+      void setMinimumHeightForWidthFunc(const HeightForWidthFunc& func);
 
       void setSizeHint(const SGVec2i& s);
       void setMinimumSize(const SGVec2i& s);
       void setMaximumSize(const SGVec2i& s);
 
+      virtual bool hasHeightForWidth() const;
+      virtual int heightForWidth(int w) const;
+      virtual int minimumHeightForWidth(int w) const;
+
       /**
        * @param ns  Namespace to register the class interface
        */
@@ -63,6 +70,11 @@ namespace canvas
 
     protected:
       SetGeometryFunc       _set_geometry;
+      HeightForWidthFunc    _height_for_width,
+                            _min_height_for_width;
+
+      int callHeightForWidthFunc( const HeightForWidthFunc& hfw,
+                                  int w ) const;
 
       virtual SGVec2i sizeHintImpl() const;
       virtual SGVec2i minimumSizeImpl() const;