KisLongPressEventFilter.h

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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef __KISLONGPRESSEVENTFILTER_H
#define __KISLONGPRESSEVENTFILTER_H
#include <QObject>
#include <QPoint>
#include <QPointer>
#include <QWidget>
 
class QMouseEvent;
class QScroller;
class QTimer;
 
class KisLongPressEventFilter : public QObject
{
    Q_OBJECT
public:
    static constexpr char ENABLED_PROPERTY[] = "KRITA_LONG_PRESS";
 
    explicit KisLongPressEventFilter(QObject *parent = nullptr);
 
    bool eventFilter(QObject *watched, QEvent *event) override;
 
private:
    static constexpr int MINIMUM_DELAY = 100;
    static constexpr int MINIMUM_DISTANCE = 0;
 
    bool handleMousePress(QWidget *target, const QMouseEvent *me);
    bool handleMouseMove(const QMouseEvent *me);
    void flush();
    void cancel();
 
    bool isWithinDistance(const QPoint &globalPos) const;
 
    int getKineticScrollDelay(QWidget *target) const;
    static const QScroller *searchScroller(QWidget *target);
 
    void triggerLongPress();
 
    static bool isContextMenuTarget(QWidget *target);
    static bool isLongPressableWidget(QWidget *target);
 
    QTimer *m_timer;
    long long m_distanceSquared = 0LL;
    QPoint m_pressLocalPos;
    QPoint m_pressGlobalPos;
    QPointer<QWidget> m_target;
#ifdef Q_OS_ANDROID
    int m_longPressTimeout;
#endif
    bool m_handlingEvent = false;
};
 
#endif