partline.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_LINE_H
#define PART_LINE_H
 
#include "customelementgraphicpart.h"
#include "qet.h"
 
class QPropertyUndoCommand;
class QetGraphicsHandlerItem;
 
class PartLine : public CustomElementGraphicPart
{
                Q_OBJECT
 
                Q_PROPERTY(Qet::EndType end1 READ firstEndType WRITE setFirstEndType)
                Q_PROPERTY(Qet::EndType end2 READ secondEndType WRITE setSecondEndType)
                Q_PROPERTY(qreal length1 READ firstEndLength WRITE setFirstEndLength)
                Q_PROPERTY(qreal length2 READ secondEndLength WRITE setSecondEndLength)
                Q_PROPERTY(QLineF line READ line WRITE setLine)
 
                // constructors, destructor
        public:
                PartLine(QETElementEditor *, QGraphicsItem * = nullptr);
                ~PartLine() override;
        private:
                PartLine(const PartLine &);
 
        signals:
                void lineChanged();
                void firstEndTypeChanged();
                void secondEndTypeChanged();
                void firstEndLengthChanged();
                void secondEndLengthChanged();
 
        
        // methods
        public:
                enum { Type = UserType + 1104 };
        
                int type() const override { return Type; }
                void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget * = nullptr) override;
                QString name() const override { return(QObject::tr("ligne", "element part name")); }
                QString xmlName() const override { return(QString("line")); }
                const QDomElement toXml(QDomDocument &) const override;
                void fromXml(const QDomElement &) override;
                virtual QPointF sceneP1() const;
                virtual QPointF sceneP2() const;
                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;
                static uint requiredLengthForEndType(const Qet::EndType &);
                static QList<QPointF> fourEndPoints(const QPointF &, const QPointF &, const qreal &);
 
                QLineF line() const;
                void setLine(const QLineF &line);
                Qet::EndType firstEndType() const {return first_end;}
                void setFirstEndType(const Qet::EndType &et);
                Qet::EndType secondEndType() const {return second_end;}
                void setSecondEndType(const Qet::EndType &et);
                qreal firstEndLength() const {return first_length;}
                void setFirstEndLength(const qreal &l);
                qreal secondEndLength() const {return second_length;}
                void setSecondEndLength(const qreal &l);
 
        protected:
                QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
                bool sceneEventFilter(QGraphicsItem *watched, QEvent *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();
                
                QPainterPath path() const;
                QList<QPointF> fourShapePoints() const;
                QRectF firstEndCircleRect() const;
                QRectF secondEndCircleRect() const;
                void debugPaint(QPainter *);
 
                /*****************/
                Qet::EndType first_end;
                qreal        first_length;
 
                Qet::EndType second_end;
                qreal        second_length;
                QList<QPointF> saved_points_;
                QLineF m_line;
                int m_vector_index = -1;
                QPropertyUndoCommand *m_undo_command;
                QVector<QetGraphicsHandlerItem *> m_handler_vector;
};
#endif