Mouse wheel zoom

Author: pka

src/plugins/globe/globe_plugin.cpp

@@ -117,17 +117,13 @@ void GlobePlugin::run()
   // The MapNode will render the Map object in the scene graph.
   mMapNode = new osgEarth::MapNode( map );
 
+  viewer.setSceneData( mMapNode );
+
   // Set a home viewpoint
   manip->setHomeViewpoint(
     osgEarthUtil::Viewpoint( osg::Vec3d( -90, 0, 0 ), 0.0, -90.0, 4e7 ),
     1.0 );
 
-  viewer.setSceneData( mMapNode );
-
-  manip->getSettings()->bindMouseDoubleClick(
-      osgEarthUtil::EarthManipulator::ACTION_GOTO,
-      osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON );
-
   // add our fly-to handler
   viewer.addEventHandler(new FlyToExtentHandler( manip, mQGisIface ));
 

src/plugins/globe/qgsosgviewer.cpp

@@ -87,6 +87,11 @@ void QgsGLWidgetAdapter::mouseMoveEvent( QMouseEvent* event )
 }
 
 
+void QgsGLWidgetAdapter::wheelEvent(QWheelEvent *event)
+{
+    _gw->getEventQueue()->mouseScroll((event->delta()>0) ? osgGA::GUIEventAdapter::SCROLL_UP : osgGA::GUIEventAdapter::SCROLL_DOWN);
+}
+
 // int mainAdapterWidget(QApplication& a, osg::ArgumentParser& arguments)
 // {
 //     // load the scene.

src/plugins/globe/qgsosgviewer.h

@@ -48,6 +48,7 @@ class QgsGLWidgetAdapter : public QGLWidget
         virtual void mousePressEvent( QMouseEvent* event );
         virtual void mouseReleaseEvent( QMouseEvent* event );
         virtual void mouseMoveEvent( QMouseEvent* event );
+        virtual void wheelEvent( QWheelEvent * event );
 
         osg::ref_ptr<osgViewer::GraphicsWindowEmbedded> _gw;
 };