ImageViewWidget.h

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#ifndef IMAGEVIEWWIDGET_H
#define IMAGEVIEWWIDGET_H
 
#include <QMainWindow>
#include <QScrollBar>
#include <QWidget>
#include "AbstractCharacterBasedApplication.h"
 
class FileDiffWidget;
 
class FileDiffSliderWidget;
 
class ImageViewWidget : public QWidget {
    Q_OBJECT
private:
    struct Private;
    Private *m;
 
    bool isValidImage() const;
    QSize imageSize() const;
 
    QSizeF imageScrollRange() const;
    void internalScrollImage(double x, double y);
    void scrollImage(double x, double y);
    void setImageScale(double scale);
    QBrush getTransparentBackgroundBrush();
    bool hasFocus() const;
    void setScrollBarRange(QScrollBar *h, QScrollBar *v);
    void updateScrollBarRange();
protected:
    QMainWindow *mainwindow();
    void resizeEvent(QResizeEvent *) override;
    void paintEvent(QPaintEvent *) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void wheelEvent(QWheelEvent *) override;
public:
    explicit ImageViewWidget(QWidget *parent = nullptr);
    ~ImageViewWidget() override;
 
    void bind(FileDiffWidget *filediffwidget, QScrollBar *vsb, QScrollBar *hsb);
 
    void clear();
 
    void setImage(std::string mimetype, QByteArray const &ba);
 
    void setLeftBorderVisible(bool f);
 
    void reflectScrollBar();
 
    static QString formatText(const Document::Line &line2);
signals:
    void scrollByWheel(int lines);
};
 
#endif // IMAGEVIEWWIDGET_H