ConcentricEllipseAssistant.h

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/*
 * SPDX-FileCopyrightText: 2008 Cyrille Berger <cberger@cberger.net>
 * SPDX-FileCopyrightText: 2010 Geoffry Song <goffrie@gmail.com>
 * SPDX-FileCopyrightText: 2017 Scott Petrovic <scottpetrovic@gmail.com>
 *
 *  SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
#ifndef _CONCENTRIC_ELLIPSE_ASSISTANT_H_
#define _CONCENTRIC_ELLIPSE_ASSISTANT_H_
 
#include "kis_painting_assistant.h"
#include "Ellipse.h"
#include <QLineF>
#include <QObject>
 
#include "kritaassistanttool_export.h"
 
class KRITAASSISTANTTOOL_EXPORT ConcentricEllipseAssistant
    : public KisPaintingAssistant
{
public:
    ConcentricEllipseAssistant();
    KisPaintingAssistantSP clone(QMap<KisPaintingAssistantHandleSP, KisPaintingAssistantHandleSP> &handleMap) const override;
 
    QPointF adjustPosition(const QPointF& point, const QPointF& strokeBegin, const bool snapToAny, qreal moveThresholdPt) override;
    void adjustLine(QPointF &point, QPointF& strokeBegin) override;
 
    QPointF getDefaultEditorPosition() const override;
    int numHandles() const override { return 3; }
    bool isAssistantComplete() const override;
 
    void transform(const QTransform &transform) override;
 
 
protected:
    QRect boundingRect() const override;
    void drawAssistant(QPainter& gc, const QRectF& updateRect, const KisCoordinatesConverter* converter, bool cached, KisCanvas2* canvas, bool assistantVisible=true, bool previewVisible=true) override;
    void drawCache(QPainter& gc, const KisCoordinatesConverter *converter,  bool assistantVisible=true) override;
private:
    QPointF project(const QPointF& pt, const QPointF& strokeBegin) const;
    mutable Ellipse m_ellipse;
    mutable Ellipse m_extraEllipse;
    explicit ConcentricEllipseAssistant(const ConcentricEllipseAssistant &rhs, QMap<KisPaintingAssistantHandleSP, KisPaintingAssistantHandleSP> &handleMap);
};
 
class KRITAASSISTANTTOOL_EXPORT ConcentricEllipseAssistantFactory
    : public KisPaintingAssistantFactory
{
public:
    ConcentricEllipseAssistantFactory();
    ~ConcentricEllipseAssistantFactory() override;
    QString id() const override;
    QString name() const override;
    KisPaintingAssistant* createPaintingAssistant() const override;
};
 
#endif