Fly to extent handler

qgis · Jul 5, 2011 · 2fa95c4 · 2fa95c4
1 parent 1a7a7ab
commit 2fa95c4
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Showing 3 changed files with 32 additions and 31 deletions.
diff --git a/src/plugins/globe/globe.earth b/src/plugins/globe/globe.earth
@@ -1,8 +1,6 @@
 <map name="QGIS Map" type="geocentric">
 
-    <!--
-    <loading_policy mode="preemptive"/>
-    -->
+    <loading_policy mode="sequential"/>
 
     <image name="world" driver="gdal">
         <url>/usr/share/osgearth/data/world.tif</url>

diff --git a/src/plugins/globe/globe_plugin.cpp b/src/plugins/globe/globe_plugin.cpp
@@ -40,39 +40,12 @@
 #include <osgEarth/Map>
 #include <osgEarth/MapNode>
 #include <osgEarthUtil/EarthManipulator>
-#include <osgEarthUtil/Viewpoint>
 #include <osgEarth/TileSource>
 #include <osgEarthDrivers/gdal/GDALOptions>
 #include <osgEarthDrivers/tms/TMSOptions>
 
 using namespace osgEarth::Drivers;
 
-// some preset viewpoints.
-static osgEarthUtil::Viewpoint VPs[] = {
-    osgEarthUtil::Viewpoint( "Africa",        osg::Vec3d(    0.0,   0.0, 0.0 ), 0.0, -90.0, 10e6 ),
-    osgEarthUtil::Viewpoint( "California",    osg::Vec3d( -121.0,  34.0, 0.0 ), 0.0, -90.0, 6e6 ),
-    osgEarthUtil::Viewpoint( "Europe",        osg::Vec3d(    0.0,  45.0, 0.0 ), 0.0, -90.0, 4e6 ),
-    osgEarthUtil::Viewpoint( "Lech",          osg::Vec3d(  10.14, 47.21, 0.0 ), 0.0, -90.0, 1e4 ),
-    osgEarthUtil::Viewpoint( "Australia",     osg::Vec3d(  135.0, -20.0, 0.0 ), 0.0, -90.0, 2e6 )
-};
-
-// a simple handler that demonstrates the "viewpoint" functionality in 
-// osgEarthUtil::EarthManipulator. Press a number key to fly to a viewpoint.
-struct FlyToViewpointHandler : public osgGA::GUIEventHandler 
-{
-    FlyToViewpointHandler( osgEarthUtil::EarthManipulator* manip ) : _manip(manip) { }
-
-    bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa )
-    {
-        if ( ea.getEventType() == ea.KEYDOWN && ea.getKey() >= '1' && ea.getKey() <= '5' )
-        {
-            _manip->setViewpoint( VPs[ea.getKey()-'1'], 4.0 );
-        }
-        return false;
-    }
-
-    osg::observer_ptr<osgEarthUtil::EarthManipulator> _manip;
-};
 
 //static const char * const sIdent = "$Id: plugin.cpp 9327 2008-09-14 11:18:44Z jef $";
 static const QString sName = QObject::tr( "Globe" );
@@ -156,7 +129,7 @@ void GlobePlugin::run()
       osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON );
 
   // add our fly-to handler
-  viewer.addEventHandler(new FlyToViewpointHandler( manip ));
+  viewer.addEventHandler(new FlyToExtentHandler( manip, mQGisIface ));
 
   // add some stock OSG handlers:
   viewer.addEventHandler(new osgViewer::StatsHandler());
@@ -213,6 +186,19 @@ void GlobePlugin::help()
 {
 }
 
+
+bool FlyToExtentHandler::handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa )
+{
+  if ( ea.getEventType() == ea.KEYDOWN && ea.getKey() == '1' )
+  {
+    QgsPoint center = mQGisIface->mapCanvas()->extent().center();
+    osgEarthUtil::Viewpoint viewpoint( osg::Vec3d(  center.x(), center.y(), 0.0 ), 0.0, -90.0, 1e4 );
+    _manip->setViewpoint( viewpoint, 4.0 );
+  }
+  return false;
+}
+
+
 /**
  * Required extern functions needed  for every plugin
  * These functions can be called prior to creating an instance

diff --git a/src/plugins/globe/globe_plugin.h b/src/plugins/globe/globe_plugin.h
@@ -26,6 +26,7 @@
 #include <QDockWidget>
 #include <osgEarth/MapNode>
 #include <osgEarth/MapLayer>
+#include <osgEarthUtil/EarthManipulator>
 
 class QAction;
 class QToolBar;
@@ -76,4 +77,20 @@ class GlobePlugin : public QObject, public QgisPlugin
     osgEarth::Drivers::QgsOsgEarthTileSource* mTileSource;
 };
 
+
+class FlyToExtentHandler : public osgGA::GUIEventHandler 
+{
+  public:
+    FlyToExtentHandler( osgEarthUtil::EarthManipulator* manip, QgisInterface *qGisIface ) : _manip(manip), mQGisIface(qGisIface) { }
+
+    bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa );
+
+  private:
+    osg::observer_ptr<osgEarthUtil::EarthManipulator> _manip;
+
+    //! Pointer to the QGIS interface object
+    QgisInterface *mQGisIface;
+};
+
+
 #endif // QGS_GLOBE_PLUGIN_H