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/**

 * @file ImgViewer.h

 * @brief 图像显示界面

 * @version 1.0

 * @date 2020-04-14

 */

#ifndef IMGVIEWER_H

#define IMGVIEWER_H



#include <QWidget>

#include <QThread>

#include <QString>

#include <QImage>

#include <QPainter>

#include <QCloseEvent> 

#include <QPaintEvent> 

#include <QMouseEvent> 

#include <QWheelEvent> 

#include <QResizeEvent>

#include "TTFdecoder.h"



namespace Ui {

class ImgViewerWindow;

}



class TTFDecodeThread : public QThread

{

    Q_OBJECT



public:

    explicit TTFDecodeThread(QWidget *parent = nullptr,

                             QString ttffilename = nullptr,

                             QString TTFFormat = nullptr,

                             int W = 0, int H = 0, int codepoint = 0);



protected:

    void run();



signals:

    void finsh_signal(QList<SvgInfo> frame_RGB_list,QString str);



private:

    QWidget *window;

    QString ttffilename;

    int W;

    int H;

    int codepoint;

    ttfdecoder_t decoder;

};



class ImgViewer : public QWidget

{

    Q_OBJECT



public:

    explicit ImgViewer(QWidget *parent = nullptr,QWidget *parentWindow = nullptr);

    ~ImgViewer();

    bool setFileList(QStringList filelist,QString TTFFormat, int W, int H, int codepoint);

    bool setFileList_multithreading(QStringList filenamelist, QString TTFFormat, int W, int H, int codepoint);



private slots:

    void reciveimgdata(QList<SvgInfo> img_RGB_list, QString filename);

    void previousImg();

    void nextImg();



protected:

    void closeEvent(QCloseEvent *event);

    void paintEvent(QPaintEvent *event);

    void mouseMoveEvent(QMouseEvent *event);

    void mousePressEvent(QMouseEvent *event);

    void mouseReleaseEvent(QMouseEvent *event);

    void mouseDoubleClickEvent(QMouseEvent *event);

    void wheelEvent(QWheelEvent *event);

    void resizeEvent(QResizeEvent *event);



private:

    void currentImg2scaledImg(SvgInfo &currentImg,QPixmap &QPixmap,const QSize &size);

    void draw_img(QPainter *painter);

    Ui::ImgViewerWindow *ui;

    QWidget *parentWindow;

    bool left_click;



    QList<QList<SvgInfo>> img_list;

    QStringList filelist;



    QList<TTFDecodeThread*> decode_thread;

    QList<TTFDecodeThread*> decode_thread_finsh;



    QList<SvgInfo> currentImg_RGB_list;

    SvgInfo currentImg;

    QPixmap scaled_img;

    QPoint point;

    QPoint startPos;

    QPoint endPos;

    bool flipRGB = false;

};



#endif // IMGVIEWER_H