kis_scratch_pad_event_filter.h

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/*
 *  SPDX-FileCopyrightText: 2011 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef __KIS_SCRATCH_PAD_EVENT_FILTER_H
#define __KIS_SCRATCH_PAD_EVENT_FILTER_H
 
#include <QObject>
#include <QTransform>
#include <KoPointerEvent.h>
 
class QWidget;
class KisScratchPad;
 
 
class KisScratchPadEventFilter : public QObject
{
    Q_OBJECT
 
public:
    KisScratchPadEventFilter(QWidget *parent);
    void setWidgetToDocumentTransform(const QTransform &transform);
 
protected:
    bool eventFilter(QObject *obj, QEvent *event) override;
 
private:
    inline QWidget* parentWidget();
    inline KoPointerEvent* createMouseEvent(QEvent *event);
    inline KoPointerEvent* createTabletEvent(QEvent *event);
 
    bool shouldResetWheelDelta(QEvent *event);
 
private:
    QTransform m_widgetToDocument;
    bool m_tabletPressed;
 
    Qt::MouseButton m_pressedButton;
    KisScratchPad *m_scratchPad;
};
 
#endif /* __KIS_SCRATCH_PAD_EVENT_FILTER_H */