MapOverviewEngine.h

//
// MapOverviewEngine.h
//
// Copyright (c) 2004-2011 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#pragma once

#include "Terrain.h"
#include "ImageSprite.h"

class MapOverviewEngine : public vtEngine
{
public:
    MapOverviewEngine(vtTerrain *pTerr);
    ~MapOverviewEngine();

    void OnMouse(vtMouseEvent &event);
    void Eval();

    void ShowMapOverview(bool bShow) { m_pMapGroup->SetEnabled(bShow); }
    bool GetShowMapOverview() {return m_pMapGroup->GetEnabled();}
    void SetTerrain(vtTerrain *pTerr);

protected:
    void CreateMapView(vtTerrain *pTerr);
    void RefreshMapView();
    void CreateArrow();

    vtGroup         *m_pMapGroup;
    osg::ref_ptr<vtImageSprite> m_pMapView;
    vtTransform     *m_pArrow;
    vtImagePtr       m_pOwnedImage;

    float   anglePrec;
    int     MapWidth;
    int     MapMargin;
    float   MapRatio;
    float   ratioMapTerrain;
    bool    m_bDown;
};