File indexing completed on 2024-06-23 04:25:59

 /*
  * 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 _PERSPECTIVE_ASSISTANT_H_
 #define _PERSPECTIVE_ASSISTANT_H_
 
 #include "kis_abstract_perspective_grid.h"
 #include "kis_painting_assistant.h"
 #include <QObject>
 #include <QPolygonF>
 #include <QLineF>
 #include <QTransform>
 
 #include <PerspectiveBasedAssistantHelper.h>
 
 class PerspectiveAssistant : public KisAbstractPerspectiveGrid, public KisPaintingAssistant
 {
     Q_OBJECT
 public:
     PerspectiveAssistant(QObject * parent = 0);
     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;
     void endStroke() override;
 
     QPointF getDefaultEditorPosition() const override;
     int numHandles() const override { return 4; }
     void drawAssistant(QPainter& gc, const QRectF& updateRect, const KisCoordinatesConverter* converter, bool cached = true,KisCanvas2* canvas=0, bool assistantVisible=true, bool previewVisible=true) override;
 
     bool contains(const QPointF& point) const override;
     qreal distance(const QPointF& point) const override;
     bool isActive() const override;
 
     int subdivisions() const;
     void setSubdivisions(int subdivisions);
 
     bool isAssistantComplete() const override;
 
     void saveCustomXml(QXmlStreamWriter *xml) override;
     bool loadCustomXml(QXmlStreamReader *xml) override;
 
 protected:
     void drawCache(QPainter& gc, const KisCoordinatesConverter *converter,  bool assistantVisible=true) override;
 private:
     QPointF project(const QPointF& pt, const QPointF& strokeBegin, const bool snapToAnyDirection, qreal moveThresholdPt);
     // creates the convex hull, returns false if it's not a quadrilateral
     // finds the transform from perspective coordinates (a unit square) to the document
     bool getTransform(QPolygonF& polyOut, QTransform& transformOut) const;
     explicit PerspectiveAssistant(const PerspectiveAssistant &rhs, QMap<KisPaintingAssistantHandleSP, KisPaintingAssistantHandleSP> &handleMap);
 
     // The number of subdivisions to draw
     int m_subdivisions {8};
     // which direction to snap to (in transformed coordinates)
     QLineF m_snapLine;
     // cached information
     mutable QTransform m_cachedTransform;
     mutable QPolygonF m_cachedPolygon;
     mutable QPointF m_cachedPoints[4];
     mutable bool m_cacheValid {false};
 
     mutable PerspectiveBasedAssistantHelper::CacheData m_cache;
 
 };
 
 class PerspectiveAssistantFactory : public KisPaintingAssistantFactory
 {
 public:
     PerspectiveAssistantFactory();
     ~PerspectiveAssistantFactory() override;
     QString id() const override;
     QString name() const override;
     KisPaintingAssistant* createPaintingAssistant() const override;
 };
 
 #endif