#pragma once

#include <QGraphicsView>
#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QMouseEvent>

#include "lp_qt_utils.h"

class LP_QT_UTILS_EXPORT lp_img_viewer : public QGraphicsView
{
    Q_OBJECT

public:
    lp_img_viewer(QGraphicsScene *scene, QWidget *parent = 0);
    lp_img_viewer(QWidget *parent = 0);
    virtual ~lp_img_viewer();

    QGraphicsPixmapItem* setImage(QImage& img);
    void fitInWindow();

signals:
    void sigScaled(qreal scale);

protected:
    virtual void wheelEvent(QWheelEvent *evt) override;
    virtual void closeEvent(QCloseEvent *evt) override;
    virtual void showEvent(QShowEvent *event) override;
private:
    void init();
    void scaleImage(qreal scale);
private:
    QGraphicsPixmapItem* img_item_ptr_{ nullptr };
    QSize origin_img_size_;
    QImage* img_ptr_{ nullptr };
    qreal scale_{ 1.0 };
};