kis_constrained_rect.h

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/*
 *  SPDX-FileCopyrightText: 2014 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef __KIS_CONSTRAINED_RECT_H
#define __KIS_CONSTRAINED_RECT_H
 
#include <QObject>
#include <QRect>
 
 
 
class KisConstrainedRect : public QObject
{
    Q_OBJECT
 
public:
    enum HandleType {
        None = 0,
        UpperLeft,
        UpperRight,
        LowerLeft,
        LowerRight,
        Upper,
        Lower,
        Left,
        Right,
        Inside,
        Creation
    };
 
public:
    KisConstrainedRect();
    ~KisConstrainedRect() override;
 
    void setRectInitial(const QRect &rect);
    void setCropRect(const QRect &cropRect);
 
    bool centered() const;
    void setCentered(bool value);
 
    bool canGrow() const;
    void setCanGrow(bool value);
 
    QRect rect() const;
 
    qreal ratio() const;
 
    void moveHandle(HandleType handle, const QPoint &offset, const QRect &oldRect);
    QPointF handleSnapPoint(HandleType handle, const QPointF &cursorPos);
 
    void setRatio(qreal value);
    void setOffset(const QPoint &offset);
    void setWidth(int value);
    void setHeight(int value);
 
    bool widthLocked() const;
    void setWidthLocked(bool value);
 
    bool heightLocked() const;
    void setHeightLocked(bool value);
 
    bool ratioLocked() const;
    void setRatioLocked(bool value);
 
    void normalize();
 
Q_SIGNALS:
    void sigValuesChanged();
    void sigLockValuesChanged();
 
private:
 
    int widthFromHeightUnsignedRatio(int height, qreal ratio, int oldWidth) const;
    int heightFromWidthUnsignedRatio(int width, qreal ratio, int oldHeight) const;
 
    void assignNewSize(const QSize &newSize);
    void storeRatioSafe(const QSize &newSize);
private:
    bool m_centered {false};
    bool m_canGrow {true};
    QRect m_rect;
    qreal m_ratio {1.0};
 
    bool m_widthLocked {false};
    bool m_heightLocked {false};
    bool m_ratioLocked {false};
 
    QRect m_cropRect;
};
 
#endif /* __KIS_CONSTRAINED_RECT_H */