partpolygon.h

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/*
        Copyright 2006-2020 The QElectroTech Team
        This file is part of QElectroTech.
        
        QElectroTech is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 2 of the License, or
        (at your option) any later version.
        
        QElectroTech is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.
        
        You should have received a copy of the GNU General Public License
        along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PART_POLYGON_H
#define PART_POLYGON_H
 
#include <QPolygonF>
#include "customelementgraphicpart.h"
 
class QPropertyUndoCommand;
class QetGraphicsHandlerItem;
class QAction;
 
class PartPolygon : public CustomElementGraphicPart
{
                Q_OBJECT
 
                Q_PROPERTY(bool closed READ isClosed WRITE setClosed)
                Q_PROPERTY(QPolygonF polygon READ polygon WRITE setPolygon)
 
                // constructors, destructor
        public:
                PartPolygon(QETElementEditor *editor, QGraphicsItem *parent = nullptr);
                ~PartPolygon() override;
        
        private:
                PartPolygon(const PartPolygon &);
 
        signals:
                void closedChange();
                void polygonChanged();
 
                // methods
        public:
                enum { Type = UserType + 1105 };
                int type() const override { return Type; }
                void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) override;
 
                QString name() const override { return(QObject::tr("polygone", "element part name")); }
                QString xmlName() const override { return(QString("polygon")); }
                void fromXml(const QDomElement &) override;
                const QDomElement toXml(QDomDocument &) const override;
 
                QPainterPath shape () const override;
                QPainterPath shadowShape() const override;
                QRectF boundingRect() const override;
                bool isUseless() const override;
                QRectF sceneGeometricRect() const override;
 
                void startUserTransformation(const QRectF &) override;
                void handleUserTransformation(const QRectF &, const QRectF &) override;
                QET::ScalingMethod preferredScalingMethod() const override;
 
                QPolygonF polygon () const;
                void setPolygon   (const QPolygonF &polygon);
 
                void addPoint        (const QPointF &point);
                void setLastPoint    (const QPointF &point);
                void removeLastPoint ();        
 
                bool isClosed  () const {return m_closed;}
                void setClosed (bool close);
 
                void setHandlerColor(QPointF pos, const QColor &color) final;
                void resetAllHandlerColor() final;
 
        protected:
                QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
                bool sceneEventFilter(QGraphicsItem *watched, QEvent *event) override;
                void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
        
        private:
                void adjusteHandlerPos();
                void handlerMousePressEvent   (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
                void handlerMouseMoveEvent    (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
                void handlerMouseReleaseEvent (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
                void sceneSelectionChanged ();
                
                void addHandler();
                void removeHandler();
                void insertPoint();
                void removePoint();
                
                
                bool m_closed;
                QList<QPointF> saved_points_;
                QPolygonF m_polygon;
                QPropertyUndoCommand *m_undo_command;
                int m_vector_index = -1;
                QVector<QetGraphicsHandlerItem *> m_handler_vector;
                QAction *m_insert_point,
                                *m_remove_point;
                QPointF m_context_menu_pos;
};
#endif