#ifndef __lpImgViewer_h_
#define __lpImgViewer_h_

#include <QGraphicsView>
#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QLabel>

class lpImgViewer : public QGraphicsView
{
	Q_OBJECT
public:
	lpImgViewer(QGraphicsScene *scene, QWidget *parent = 0);
	lpImgViewer(QWidget* parent = 0);
	~lpImgViewer(){
		if (mpImg)
			delete mpImg;
	}

	QGraphicsPixmapItem* setImg(QImage& img);
	void setInfoLabel(QLabel* ipLabel){ mpInfoLabel = ipLabel; }

	virtual void wheelEvent(QWheelEvent *evt);
	virtual void mouseMoveEvent(QMouseEvent *evt);
    virtual void resizeEvent(QResizeEvent* evt);
	virtual void mouseReleaseEvent(QMouseEvent *evt);
    virtual void closeEvent(QCloseEvent *evt);
	virtual void clear();

signals:
	void imgScaled(QTransform tf, QPointF center);
	void imgMoved(QPointF pos);
	void pixelSelected(QPoint pos);

public slots:
	void scaleImg(QTransform tf, QPointF center);
	void moveImg(QPointF pos);
	void selectPixel(QPoint pos);

private:
	QGraphicsPixmapItem* mpImgItem;
	QSize mImgOriSize;
	QLabel* mpInfoLabel;
	QImage* mpImg;
	QGraphicsScene* lpScene{ nullptr };
	void scaleImg2(qreal scale);
};

#endif