navigationHandler.h

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/*******************************************************************************
** Copyright (c) 2003 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: navigationHandler.h,v $ $Revision: 1.19 $ $State: Exp $
*******************************************************************************/


#ifndef NAVIGATIONHANDLER_H_
#define NAVIGATIONHANDLER_H_

#include "tmqt/eventHandler.h"
#include "vrfGuiCore/menuItems.h"

#include <QtCore/QPoint>
#include <QtCore/QTimer>

class DtTMViewportExtents;
class DtExtent;
class DtTMArea;
class DtModelData;


#include "tmEventHandler/tmEventHandlerDefines.h"
class DT_DLL_tmEventHandler DtNavigationHandler : public DtEventHandler
{
   Q_OBJECT

public:
   DtNavigationHandler();
   
   virtual ~DtNavigationHandler();
   
public:
   static DtEventHandler* create(DtEventController* owner, void* usr);

   virtual bool aboutToDraw(DtTMMapArea* area, QPainter* pix);

   virtual bool userDefinedAction(DtUserDefinedType iAction, void* usr);

public slots:
   virtual bool mouseEvent(DtTMMapArea*, QMouseEvent* evnt, const DtPoint& pnt);
   virtual bool keyboardEvent(DtTMMapArea* area, QKeyEvent* evnt);

   virtual void timedPan();

protected:
   virtual bool processNavigationKey(DtTMMapArea* area, int key, int state);

protected:
   virtual void mouseZoom(DtTMMapArea* area, QMouseEvent *e);

   virtual void reorderRectangle(QRect& rect);
   virtual void resizeRectToFitAspectRatio(QRect& r, const double& ratio);
   virtual void resizeRectToFitAspectRatio(DtExtent& ext, DtTMViewportExtents* extents);
   virtual void resizeRectToFitAspectRatioFromCenter(DtExtent& ext, DtTMViewportExtents* extents);
   virtual DtExtent zoom(const DtExtent& ext, double mag) const;

   virtual void zoomToExtent(DtTMMapArea* area);

   virtual DtExtent getZoomExtentRect(DtTMMapArea* area, const DtModelData* d) const;

   virtual void zoomToExtent(DtTMMapArea* area, const QRect& rect);
   virtual DtExtent convertRectToExtent(DtTMMapArea* area, const QRect& rect) const;

   virtual void setCursor(QEvent*);

protected:
   DtUserDefinedType myNavigationDirection;
   QTimer myPanTimer;
   bool myShiftTracking;
   QPoint myMouseBegin;
   QPoint myMouseLast;
   DtTMArea*   myTimerMap;
   int myKey;
   int myState;
   bool myLeftButton;
   bool myMouseShiftMap;
   bool myInMapShiftMode;

   DtPoint  myMapBegin;
   DtPoint  myMapLast;
};

#endif //NAVIGATIONHANDLER_H_