KisClickableGLImageWidget.h

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/*
 *  SPDX-FileCopyrightText: 2019 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KISCLICKABLEGLIMAGEWIDGET_H
#define KISCLICKABLEGLIMAGEWIDGET_H
 
#include <KisGLImageWidget.h>
#include <QScopedPointer>
 
 
class KisClickableGLImageWidget : public KisGLImageWidget
{
    Q_OBJECT
public:
    struct HandlePaintingStrategy {
        virtual void drawHandle(QPainter *p, const QPointF &normalizedPoint, const QRect &rect, bool useOpacity) = 0;
        virtual ~HandlePaintingStrategy() {}
    };
 
    struct VerticalLineHandleStrategy : public HandlePaintingStrategy {
        void drawHandle(QPainter *p, const QPointF &normalizedPoint, const QRect &rect, bool useOpacity) override;
    };
 
    struct CircularHandleStrategy : public HandlePaintingStrategy {
        void drawHandle(QPainter *p, const QPointF &normalizedPoint, const QRect &rect, bool useOpacity) override;
    };
 
public:
    KisClickableGLImageWidget(QWidget *parent = nullptr);
    KisClickableGLImageWidget(const KisSurfaceColorSpaceWrapper &colorSpace,
                              QWidget *parent = nullptr);
    ~KisClickableGLImageWidget();
 
    void setHandlePaintingStrategy(HandlePaintingStrategy *strategy);
    void setUseHandleOpacity(bool value);
 
    QPointF normalizedPos() const;
    void setNormalizedPos(const QPointF &pos, bool update = true);
 
    void paintEvent(QPaintEvent *event) override;
 
    void mousePressEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
 
Q_SIGNALS:
    void selected(const QPointF &normalizedPos);
 
private:
    QPointF normalizePoint(const QPointF &pos) const;
 
private:
    QPointF m_normalizedClickPoint;
    QScopedPointer<HandlePaintingStrategy> m_handleStrategy;
    bool m_useHandleOpacity = true;
};
 
#endif // KISCLICKABLEGLIMAGEWIDGET_H