/***************************************************************************
 *   Copyright by (C) 2004 by Garrett Potts                                *
 *   Copyright by (C) 2009 by Jack R                                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#ifndef OSSIMPLANETWIDGET_H
#define OSSIMPLANETWIDGET_H

#include <QtOpenGL/QGLWidget>

#include <ossimPlanet/ossimPlanetViewer.h>
#include <osgViewer/Viewer>


class ossimOsgMainFormController;

class OssimPlanetQgisGlWidget : public QGLWidget
{
  Q_OBJECT
public:
  OssimPlanetQgisGlWidget( QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0 );
  OssimPlanetQgisGlWidget( const QGLFormat & format, QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0 );
  virtual ~OssimPlanetQgisGlWidget();

  osgViewer::GraphicsWindow* getGraphicsWindow() { return theGraphicsWindow.get(); }
  const osgViewer::GraphicsWindow* getGraphicsWindow() const { return theGraphicsWindow.get(); }

  void setMouseNavigationFlag(bool flag);
  bool getMouseNavigationFlag()const;

  virtual void dropEvent ( QDropEvent * event );
  virtual void dragEnterEvent(QDragEnterEvent *event);

protected slots:

  void doIdleAnimationFrame();

signals:
  void signalMouseMoveEvent(QMouseEvent* event);
  void signalMousePressEvent(QMouseEvent* event);
  void signalMouseReleaseEvent(QMouseEvent* event);
  void signalMouseDoubleClickEvent(QMouseEvent* event);
  void signalViewPositionChangedLatLonHgtHPR(double lat, double lon, double height,
                                             double heading, double pitch, double roll);
  void signalDropEvent(QDropEvent * event);
  void signalDragEnterEvent(QDragEnterEvent *event);

protected:
  void init();
  virtual void frameIfNeeded()=0;
  virtual void resizeGL( int width, int height );
  virtual void keyPressEvent( QKeyEvent* event );
  virtual void keyReleaseEvent( QKeyEvent* event );
  virtual void mousePressEvent( QMouseEvent* event );
  virtual void mouseReleaseEvent( QMouseEvent* event );
  virtual void mouseMoveEvent( QMouseEvent* event );
  osgGA::GUIEventAdapter::KeySymbol qtKeyToOsg(QKeyEvent * e)const;
  void addModifiers(osg::ref_ptr<osgGA::EventQueue> eventQueue, Qt::KeyboardModifiers modifier);

  osg::ref_ptr<osgViewer::GraphicsWindowEmbedded> theGraphicsWindow;
  bool         theMouseNavigationFlag;
  bool thePassAllUnhandledEventsFlag;
};

class OssimPlanetQgisViewer : public ossimPlanetViewer, public OssimPlanetQgisGlWidget
{
public:
  OssimPlanetQgisViewer(QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0);
  OssimPlanetQgisViewer( const QGLFormat & format, QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0 );
  virtual void paintGL();

  virtual void requestRedraw();
  virtual void requestContinuousUpdate(bool needed=true);
  virtual void frameIfNeeded();
  virtual void mouseMoveEvent( QMouseEvent* event );
  virtual void updateTraversal();
protected:
  QTimer *timer();    // Ensures that qtimer_ exists

  OpenThreads::ReentrantMutex theDrawMutex;
  bool theRequestRedrawFlag;
  bool theRequestContinuousUpdateFlag;
  int theTimerInterval;
  osg::Matrixd theCurrentViewMatrix;
  osg::Matrixd theCurrentViewMatrixInverse;
  osg::Vec3d   theCurrentViewLlh;
  osg::Vec3d   theCurrentViewHpr;
private:
  QTimer *theQTimer;	// This  should always be accessed via the timer() method
};

#endif // OSSIMPLANETWIDGET_H