partline.h

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/*
    Copyright 2006-2019 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