#ifndef MAPCAVAS_H
#define MAPCAVAS_H

#include "QGraphicsView"
#include "qlabel.h"
#include <QVector>

class RasterImageLayer;

class MapTool;

class Mapcavas : public QGraphicsView
{
	Q_OBJECT

public:
	Mapcavas(QWidget* pParent = NULL);
	~Mapcavas();


	void DisplayFrameNumber(int frameNumber);


	void mousePressEvent(QMouseEvent *event);
	void mouseMoveEvent(QMouseEvent *event);
	void mouseReleaseEvent(QMouseEvent *event);
	void mouseDoubleClickEvent(QMouseEvent *event);

	void SetImage(QPixmap *image);
	bool HasImage();
	void ensureSceneVisible();

	void updateCrosshair(double sceneX, double sceneY);
	void removeCrosshair();

	void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
	void scaling(qreal scaleFactor);

	void zoomIn();  // 放大
	void zoomOut();  // 缩小
	void zoom(float scaleFactor); // 缩放 - scaleFactor缩放的比例因子

	// 平移速度
	void setTranslateSpeed(qreal speed);
	qreal translateSpeed() const;

	// 缩放的增量
	void setZoomDelta(qreal delta);
	qreal zoomDelta() const;

	// set raster image layer and refresh map
	void setImageLayer(RasterImageLayer* layer);
	void freshmap();

	RasterImageLayer* imageLayer() const;

	// MapTool management
	void setMapTool(MapTool* tool);
	void unsetMapTool(MapTool* tool);
	MapTool* mapTool() const;

protected:
	QGraphicsScene *m_qtGraphicsScene;
private:
	QGraphicsPixmapItem *m_GraphicsPixmapItemHandle;
	QLabel *m_framNumberLabel;//显示实时采集到的帧数

	RasterImageLayer* m_imageLayer = nullptr; // associated raster image layer
	MapTool* m_mapTool = nullptr;         // current active map tool

	qreal m_translateSpeed;  // 平移速度
	qreal m_zoomDelta;  // 缩放的增量
	bool m_bMouseTranslate;  // 平移标识
	QPoint m_lastMousePos;  // 鼠标最后按下的位置
	qreal m_scale;  // 缩放值

	double m_CrosshairHalfLen = 10.0;
	QGraphicsLineItem* m_hLine = nullptr;  // horizontal line
	QGraphicsLineItem* m_vLine = nullptr;  // vertical line


signals:
	void leftMouseButtonPressed(int, int, QVector<double>, QVector<double>);
};
#endif