libosgearth-dev 2.4.0+dfsg-6 / usr / include / osgEarthQt / TerrainProfileWidget

/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
#ifndef OSGEARTHQT_TERRAINPROFILEWIDGET_H
#define OSGEARTHQT_TERRAINPROFILEWIDGET_H 1

#include <osgEarthQt/Actions>
#include <osgEarthQt/Common>
#include <osgEarthQt/DataManager>
#include <osgEarthQt/TerrainProfileGraph>

#include <osgEarth/Map>
#include <osgEarthAnnotation/FeatureNode>
#include <osgEarthAnnotation/PlaceNode>
#include <osgEarthFeatures/Feature>

#include <QFrame>
#include <QHBoxLayout>
#include <QPushButton>
#include <QVBoxLayout>
#include <QWidget>

namespace osgEarth { namespace QtGui
{
    /**
     * Widget that displays a TerrainProfileGraph and provides interactive
     * query and zoom controls.
     */     
    class OSGEARTHQT_EXPORT TerrainProfileWidget : public QFrame
    {
    Q_OBJECT

    public:
      TerrainProfileWidget(osg::Group* root, osgEarth::MapNode* mapNode);

      virtual ~TerrainProfileWidget();

      void setActiveView(osgViewer::View* view);

      void setActiveViews(const ViewVector& views);

      void setStartEnd(const GeoPoint& start, const GeoPoint& end);

      void updatePosition(double lat, double lon, const std::string& text);

    public:
      void notifyTerrainProfileChanged() { emit onNotifyTerrainProfileChanged(); }

    signals:
        void onNotifyTerrainProfileChanged();

    private slots:
      void onCaptureToggled(bool checked);
      void onUndoZoom();
      void onTerrainProfileChanged();

    protected:  
      void initialize();
      void addView(osgViewer::View* view);
      void removeViews();
      void refreshViews();
      void hideEvent(QHideEvent* e);
      void showEvent(QShowEvent* e);

    private:

      struct StartEndPair
      {
        GeoPoint start;
        GeoPoint end;

        StartEndPair(GeoPoint profileStart, GeoPoint profileEnd)
        {
          start = profileStart;
          end = profileEnd;
        }
      };

      void drawProfileLine();

      osg::ref_ptr<osg::Group>                                _root;
      osg::ref_ptr<osgEarth::MapNode>                         _mapNode;
      ViewVector                                              _views;
      osg::ref_ptr<osgEarth::Util::TerrainProfileCalculator>  _calculator;
      TerrainProfileGraph*                                    _graph;
      QAction*                                                _captureAction;
      QAction*                                                _undoZoomAction;
      osg::ref_ptr<osgGA::GUIEventHandler>                    _guiHandler;
      std::vector<StartEndPair>                               _profileStack;
      osg::ref_ptr<osgEarth::Annotation::FeatureNode>         _lineNode;
      osgEarth::Symbology::Style                              _lineStyle;
      osg::ref_ptr<osgEarth::Annotation::PlaceNode>           _markerNode;
      osg::ref_ptr<osg::Image>                                _markerImage;
      osgEarth::Symbology::Style                              _placeStyle;
    };


    /**
     * Event handler for entering a new terrain profile line.
     */
    struct TerrainProfileMouseHandler : public osgGA::GUIEventHandler
    {
      TerrainProfileMouseHandler(osgEarth::MapNode* mapNode, osg::Group* root, TerrainProfileWidget* profileWidget)
        : _mapNode(mapNode), _root(root), _profileWidget(profileWidget), _capturing(false), _startValid(false), _mouseDown(false)
      {
        //Define a style for the line
        osgEarth::Symbology::LineSymbol* ls = _lineStyle.getOrCreateSymbol<osgEarth::Symbology::LineSymbol>();
        ls->stroke()->color() = osgEarth::Symbology::Color::Yellow;
        ls->stroke()->width() = 2.0f;
        ls->tessellation() = 20;
        _lineStyle.getOrCreate<osgEarth::Symbology::AltitudeSymbol>()->clamping() = osgEarth::Symbology::AltitudeSymbol::CLAMP_TO_TERRAIN;
      }

      void setCapturing(bool capturing)
      {
        _capturing = capturing;
      }

      bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa )
      {
        if (_capturing)
        {
          if ( ea.getEventType() == osgGA::GUIEventAdapter::PUSH )
          {
            if (ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON)
            {
              _mouseDown = true;
              _xDown = ea.getX();
              _yDown = ea.getY();
              aa.requestRedraw();
            }
          }
          else if (ea.getEventType() == osgGA::GUIEventAdapter::RELEASE)
          {
            if (ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON)
            {
              if (_mouseDown && _xDown == ea.getX() && _yDown == ea.getY())
              {
                osg::Vec3d world;
                if ( _mapNode->getTerrain()->getWorldCoordsUnderMouse( aa.asView(), ea.getX(), ea.getY(), world ))
                {
                  osgEarth::GeoPoint mapPoint;
                  mapPoint.fromWorld( _mapNode->getMapSRS(), world );
                  //_mapNode->getMap()->worldPointToMapPoint( world, mapPoint );

                  if (!_startValid)
                  {
                    _start = mapPoint.vec3d();
                    _end = mapPoint.vec3d();
                    _startValid = true;
                  }
                  else
                  {
                    _end = mapPoint.vec3d();
                    _startValid = false;

                    _profileWidget->setStartEnd(GeoPoint(_mapNode->getMapSRS(), _start.x(), _start.y()),
                                                GeoPoint(_mapNode->getMapSRS(), _end.x(), _end.y()));
                  }

                  updateDisplay();
                }
              }

              _mouseDown = false;
              aa.requestRedraw();
            }
          }
          else if (ea.getEventType() == osgGA::GUIEventAdapter::MOVE)
          {
            if (_startValid)
            {
              osg::Vec3d world;
              if (_mapNode->getTerrain()->getWorldCoordsUnderMouse(aa.asView(), ea.getX(), ea.getY(), world))
              {
                osgEarth::GeoPoint mapPoint;
                mapPoint.fromWorld( _mapNode->getMapSRS(), world );
                //_mapNode->getMap()->worldPointToMapPoint( world, mapPoint );
                _end = mapPoint.vec3d();

                updateDisplay();
                aa.requestRedraw();
              }
            }
          }
        }

        return false;
      }

      void updateDisplay()
      {
        if (!_startValid)
        {
          if (_featureNode.valid())
          {
            _root->removeChild( _featureNode.get() );
            _featureNode = 0L;
          }

          return;
        }

        osgEarth::Symbology::LineString* line = new osgEarth::Symbology::LineString();
        line->push_back( _start );
        line->push_back( _end );

        osgEarth::Features::Feature* feature = new osgEarth::Features::Feature(line, _mapNode->getMapSRS());
        feature->geoInterp() = osgEarth::GEOINTERP_GREAT_CIRCLE;    
        feature->style() = _lineStyle;

        if (!_featureNode.valid())
        {
          _featureNode = new osgEarth::Annotation::FeatureNode( _mapNode, feature );
          _featureNode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
          _root->addChild( _featureNode.get() );
        }
        else
        {
          _featureNode->setFeature(feature);
        }
      }

      
      osg::ref_ptr<osgEarth::MapNode>  _mapNode;
      osg::Group* _root;
      TerrainProfileWidget* _profileWidget;
      osg::ref_ptr<osgEarth::Annotation::FeatureNode> _featureNode;
      osgEarth::Symbology::Style _lineStyle;
      osg::Vec3d _start;
      osg::Vec3d _end;
      bool _capturing;
      bool _startValid;
      bool _mouseDown;
      float _xDown, _yDown;
    };
} }

#endif // OSGEARTHQT_TERRAINPROFILEWIDGET_H