DYTSrouce/src/scene/ui/ZoomManager.h

#ifndef Zoom_H_
#define Zoom_H_

#include "BackGroundWidget.h"
#include "CompositeHandle.h"
#include "CompositeWidget.h"
#include "ZoomWidget.h"
#include "ZoomHandle.h"

#include <QObject>
#include <QVariant>

class ZoomManager : public osg::Referenced {
public:
    ZoomManager(class OEScene* oeScene);
    ~ZoomManager(void);

    void ResetCanvasPosition(double x, double y);
    void SendZoom();

    osgWidget::Canvas* GetCanvasZoom() {
        return _canvasZoom;
    }
	osgWidget::Widget* GetBar() const {
		return _bar;
	}

    void AttachViewUI(class OsgViewUI* ui);
    //
    //signals:
    //	void signalZoom(QVariant var);

protected:
    void slotZoom();

private:
    osgWidget::Canvas* _canvasZoom;

    osgWidget::Widget* _lessen;
    osgWidget::Widget* _enlargement;
    osgWidget::Widget* _zoomBackground;
    osgWidget::Widget* _bar;
    osgWidget::Widget* _bar_;
    osgWidget::Widget* _zoomBackground_shadow;

    int _zoomNum[1];

    class OEScene* oeScene_;

public:
    enum STATE {
        MOUSE_PUSH,
        MOUSE_RELEASE,
        MOUSE_LEAVE,
        MOUSE_OVER,
        MOUSE_DRAG,
        DEFAULT
    };

    STATE	state;
    double	zoom;
};

#endif