Canvas: clip region rounding and catch negative size.

[simgear.git] / simgear / canvas / CanvasEventVisitor.hxx

diff --git a/simgear/canvas/CanvasEventVisitor.hxx b/simgear/canvas/CanvasEventVisitor.hxx
index 9b1fe810ee65511ca705f2bd46721cfc0a7f499a..a82f09281d7bec9511c7b1e84ee36f73e6185570 100644 (file)
--- a/simgear/canvas/CanvasEventVisitor.hxx
+++ b/simgear/canvas/CanvasEventVisitor.hxx
@@ -38,9 +38,17 @@ namespace canvas
         TRAVERSE_DOWN
       };
 
+      /**
+       *
+       * @param mode
+       * @param pos     Mouse position
+       * @param delta   Mouse movement since last mouse move event
+       * @param root    Element to dispatch events to if no element is hit
+       */
       EventVisitor( TraverseMode mode,
                     const osg::Vec2f& pos,
-                    const osg::Vec2f& delta );
+                    const osg::Vec2f& delta,
+                    const ElementPtr& root = ElementPtr() );
       virtual ~EventVisitor();
       virtual bool traverse(Element& el);
       virtual bool apply(Element& el);
@@ -51,6 +59,7 @@ namespace canvas
 
       TraverseMode          _traverse_mode;
       EventPropagationPath  _target_path;
+      ElementPtr            _root;
 
   };