qt-everywhere-src-5.14.1/qtquickcontrols/src/extras/Private/qquickmousethief_p.h

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#ifndef MOUSETHIEF_H
#define MOUSETHIEF_H

#include <QObject>
#include <QPointer>
#include <QtQuick/QQuickItem>

class QQuickMouseThief : public QObject
{
    Q_OBJECT
    Q_PROPERTY(bool receivedPressEvent READ receivedPressEvent
        WRITE setReceivedPressEvent NOTIFY receivedPressEventChanged)
public:
    explicit QQuickMouseThief(QObject *parent = 0);

    bool receivedPressEvent() const;
    void setReceivedPressEvent(bool receivedPressEvent);

    Q_INVOKABLE void grabMouse(QQuickItem *item);
    Q_INVOKABLE void ungrabMouse();
    Q_INVOKABLE void acceptCurrentEvent();
signals:
    /*!
        Coordinates are relative to the window of mItem.
    */
    void pressed(int mouseX, int mouseY);

    void released(int mouseX, int mouseY);

    void clicked(int mouseX, int mouseY);

    void touchUpdate(int mouseX, int mouseY);

    void receivedPressEventChanged();

    void handledEventChanged();
protected:
    bool eventFilter(QObject *obj, QEvent *event);
private slots:
    void itemWindowChanged(QQuickWindow *window);
private:
    void emitPressed(const QPointF &pos);
    void emitReleased(const QPointF &pos);
    void emitClicked(const QPointF &pos);

    QPointer<QQuickItem> mItem;
    bool mReceivedPressEvent;
    bool mAcceptCurrentEvent;
};

#endif // MOUSETHIEF_H