kis_draggable_tool_button.h

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/*
 *  SPDX-FileCopyrightText: 2015 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef __KIS_DRAGGABLE_TOOL_BUTTON_H
#define __KIS_DRAGGABLE_TOOL_BUTTON_H
 
#include <QToolButton>
 
 
class KisDraggableToolButton : public QToolButton
{
    Q_OBJECT
public:
    KisDraggableToolButton(QWidget *parent);
    ~KisDraggableToolButton() override;
 
    void mousePressEvent(QMouseEvent *e) override;
    void mouseMoveEvent(QMouseEvent *e) override;
 
    void beginDrag(const QPoint &pos);
    int continueDrag(const QPoint &pos);
    int movementDelta(const QPoint &pos);
 
private:
    qreal tangent();
 
Q_SIGNALS:
    void offsetChanged(int offset);
    void valueChanged(int delta);
 
private:
    Qt::Orientation m_orientation;
    QPoint m_startPoint;
    QPoint m_lastPosition;
};
 
#endif /* __KIS_DRAGGABLE_TOOL_BUTTON_H */