ccpdfscrollarea.h

#ifndef CCPDFSCROLLAREA_H
#define CCPDFSCROLLAREA_H
 
#include "ccpdfviewer.h"
#include <QGestureEvent>
#include <QScrollArea>
#include <QTouchEvent>
 
class CCPdfScrollArea : public QScrollArea {
    Q_OBJECT
public:
    explicit CCPdfScrollArea(QWidget* parent = nullptr)
        : QScrollArea(parent) {
        setAttribute(Qt::WA_AcceptTouchEvents);
        grabGesture(Qt::PinchGesture);
    }
 
signals:
    void indicate_zoom(CCPdfViewer::ZoomDirection);
 
protected:
    void mousePressEvent(QMouseEvent* event) override;
 
    void mouseReleaseEvent(QMouseEvent* event) override;
 
    void mouseMoveEvent(QMouseEvent* event) override;
 
    void handleGestureEvent(QGestureEvent* event);
 
private:
    bool is_usr_clicked { false }; 
    QPoint prev_point; 
};
 
#endif // CCPDFSCROLLAREA_H