qelectrotech-source-mirror/sources/qetgraphicsitem/qetshapeitem.cpp

/*
    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/>.
*/
#include "qetshapeitem.h"
#include "createdxf.h"
#include "diagram.h"
#include "qet.h"
#include "shapegraphicsitempropertieswidget.h"
#include "PropertiesEditor/propertieseditordialog.h"
#include "QPropertyUndoCommand/qpropertyundocommand.h"
#include "QetGraphicsItemModeler/qetgraphicshandlerutility.h"
#include "qetxml.h"
#include "diagramview.h"
#include "qeticons.h"

/**
    @brief QetShapeItem::QetShapeItem
    Constructor of shape item. point 1 and 2 must be in scene coordinate
    @param p1 first point
    @param p2 second point
    @param type type of item (line, rectangle, ellipse)
    @param parent parent item
*/
QetShapeItem::QetShapeItem(QPointF p1, QPointF p2, ShapeType type, QGraphicsItem *parent) :
    QetGraphicsItem(parent),
    m_shapeType(type),
    m_P1 (p1),
    m_P2 (p2),
    m_hovered(false)
{
    if (type == Polygon) m_polygon << m_P1 << m_P2;
    setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemSendsGeometryChanges);
    setAcceptHoverEvents(true);
    m_pen.setStyle(Qt::SolidLine);
        //ensure handlers are always above this item
    connect(this, &QetShapeItem::zChanged, [this]()
    {
        for(QetGraphicsHandlerItem *qghi : m_handler_vector)
            qghi->setZValue(this->zValue()+1);
    });

    m_insert_point = new QAction(tr("Ajouter un point"), this);
    m_insert_point->setIcon(QET::Icons::Add);
    connect(m_insert_point, &QAction::triggered, this, &QetShapeItem::insertPoint);
    m_remove_point = new QAction(tr("Supprimer ce point"), this);
    m_remove_point->setIcon(QET::Icons::Remove);
    connect(m_remove_point, &QAction::triggered, this, &QetShapeItem::removePoint);

}

QetShapeItem::~QetShapeItem()
{
    if(!m_handler_vector.isEmpty())
        qDeleteAll(m_handler_vector);
}

/**
    @brief QetShapeItem::setPen
    Set the pen to use for draw the shape
    @param pen
*/
void QetShapeItem::setPen(const QPen &pen)
{
    if (m_pen == pen) return;
    m_pen = pen;
    update();
    emit penChanged();
}

/**
    @brief QetShapeItem::setBrush
    Set the brush to use for the fill the shape
    @param brush
*/
void QetShapeItem::setBrush(const QBrush &brush)
{
    if (m_brush == brush) return;
    m_brush = brush;
    update();
    emit brushChanged();
}

/**
    @brief QetShapeItem::setP2
    Set the second point of this item.
    If this item is a polyline,
    the last point of the polyline is replaced by P2.
    @param P2
*/
void QetShapeItem::setP2(const QPointF &P2)
{
    if (m_shapeType == Polygon && m_polygon.last() != P2)
    {
        prepareGeometryChange();
        m_polygon.replace(m_polygon.size()-1, P2);
    }
    else if (P2 != m_P2)
    {
        prepareGeometryChange();
        m_P2 = P2;
    }
}

/**
    @brief QetShapeItem::setLine
    Set item geometry to line (only available for line shape)
    @param line
    @return  : true when shape is a Line, else false
*/
bool QetShapeItem::setLine(const QLineF &line)
{
    if (Q_UNLIKELY(m_shapeType != Line)) return false;
    prepareGeometryChange();
    m_P1 = line.p1();
    m_P2 = line.p2();
    adjusteHandlerPos();
    return true;
}

/**
    @brief QetShapeItem::setRect
    Set this item geometry to rect (only available if shape is a rectangle or an ellipse)
    @param rect : new rect
    @return  : true when shape is rectangle or ellipse, else false
*/
bool QetShapeItem::setRect(const QRectF &rect)
{
    if (Q_LIKELY(m_shapeType == Rectangle || m_shapeType == Ellipse))
    {
        prepareGeometryChange();
        m_P1 = rect.topLeft();
        m_P2 = rect.bottomRight();
        adjusteHandlerPos();
        return true;
    }

    return false;
}

/**
    @brief QetShapeItem::setPolygon
    Set this item geometry to polygon (only available if shape is a polyline)
    @param polygon : new polygon
    @return true if item is polygon, else false
*/
bool QetShapeItem::setPolygon(const QPolygonF &polygon)
{
    if (Q_UNLIKELY(m_shapeType != Polygon)) {
        return false;
    }
    prepareGeometryChange();
    m_polygon = polygon;
    adjusteHandlerPos();
    return true;
}

/**
    @brief QetShapeItem::setClosed
    Close this item, have effect only if this item is a polygon.
    @param close
*/
void QetShapeItem::setClosed(bool close)
{
    if (m_shapeType == Polygon && close != m_closed)
    {
        prepareGeometryChange();
        m_closed = close;
        emit closeChanged();
    }
}

void QetShapeItem::setXRadius(qreal X)
{
    m_xRadius = X;
    update();
    adjusteHandlerPos();
    emit XRadiusChanged();
}

void QetShapeItem::setYRadius(qreal Y)
{
    m_yRadius = Y;
    update();
    adjusteHandlerPos();
    emit YRadiusChanged();
}

/**
    @brief QetShapeItem::pointCount
    @return the number of point in the polygon
*/
int QetShapeItem::pointsCount() const
{
    return m_polygon.size();
}

/**
    @brief QetShapeItem::setNextPoint
    Add a new point to the curent polygon
    @param P the new point.
*/
void QetShapeItem::setNextPoint(QPointF P)
{
    prepareGeometryChange();
    m_polygon.append(Diagram::snapToGrid(P));
}

/**
    @brief QetShapeItem::removePoints
    Number of point to remove on the polygon
    If number is superior to number of polygon points-2,
    all points of polygon will be removed except
    the first two (minimum point for the polygon);
*/
void QetShapeItem::removePoints(int number)
{
    if (pointsCount() == 2 || number < 1) return;
    if ((pointsCount()-2) < number)
        number = pointsCount() - 2;

    int i = 0;
    do
    {
        i++;
        prepareGeometryChange();
        m_polygon.pop_back();
        setTransformOriginPoint(boundingRect().center());

    } while (i < number);
}

/**
    @brief QetShapeItem::boundingRect
    @return the bounding rect of this item
*/
QRectF QetShapeItem::boundingRect() const
{
    return shape().boundingRect().adjusted(-6, -6, 6, 6);
}

/**
    @brief QetShapeItem::shape
    @return the shape of this item
*/
QPainterPath QetShapeItem::shape() const
{
    QPainterPath path;

    switch (m_shapeType)
    {
        case Line:
            path.moveTo(m_P1);
            path.lineTo(m_P2);
            break;
        case Rectangle:
            path.addRoundedRect(
                        QRectF(m_P1, m_P2),
                        m_xRadius,
                        m_yRadius);
            break;
        case Ellipse:
            path.addEllipse(QRectF(m_P1, m_P2));
            break;
        case Polygon:
            path.addPolygon(m_polygon);
            if (m_closed) {
                path.closeSubpath();
            }
            break;
    }

    QPainterPathStroker pps;
    pps.setWidth(m_hovered? m_pen.widthF()+10 : m_pen.widthF());
    pps.setJoinStyle(Qt::RoundJoin);
    path = pps.createStroke(path);

    return (path);
}

/**
    @brief QetShapeItem::paint
    Paint this item
    @param painter
    @param option
    @param widget
*/
void QetShapeItem::paint(
        QPainter *painter,
        const QStyleOptionGraphicsItem *option,
        QWidget *widget)
{
    Q_UNUSED(option)
    Q_UNUSED(widget)

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing, true);
    painter->setPen(m_pen);
    painter->setBrush(m_brush);

        //Draw hovered shadow
    if (m_hovered)
    {
        painter->save();
        QColor color(Qt::darkBlue);
        color.setAlpha(50);
        painter -> setBrush (QBrush (color));
        painter -> setPen   (Qt::NoPen);
        painter -> drawPath (shape());
        painter -> restore  ();
    }

    switch (m_shapeType)
    {
    case Line:      painter->drawLine(QLineF(m_P1, m_P2)); break;
    case Rectangle: painter->drawRoundedRect(QRectF(m_P1, m_P2),
                         m_xRadius,
                         m_yRadius); break;
    case Ellipse:   painter->drawEllipse(QRectF(m_P1, m_P2)); break;
    case Polygon:   m_closed ? painter->drawPolygon(m_polygon)
                 : painter->drawPolyline(m_polygon); break;
    }

    painter->restore();
}

/**
    @brief QetShapeItem::hoverEnterEvent
    Handle hover enter event
    @param event
*/
void QetShapeItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
    m_hovered = true;
    QetGraphicsItem::hoverEnterEvent(event);
}

/**
    @brief QetShapeItem::hoverLeaveEvent
    Handle hover leave event
    @param event
*/
void QetShapeItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
    m_hovered = false;
    QetGraphicsItem::hoverLeaveEvent(event);
}

void QetShapeItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    event->ignore();
    QetGraphicsItem::mousePressEvent(event);

    if (event->button() == Qt::LeftButton) {
        switchResizeMode();
        event->accept();
    }
}

/**
    @brief QetShapeItem::itemChange
    @param change
    @param value
    @return
*/
QVariant QetShapeItem::itemChange(QGraphicsItem::GraphicsItemChange change,
                  const QVariant &value)
{
    if (change == ItemSelectedHasChanged)
    {
        if (value.toBool() == true) {
            //If this is selected, wa add handlers.
            addHandler();
        }
        else //Else this is deselected, we remove handlers
        {
            if(!m_handler_vector.isEmpty())
            {
                qDeleteAll(m_handler_vector);
                m_handler_vector.clear();
            }
            m_resize_mode = 1;
        }
    }
    else if (change == ItemPositionHasChanged) {
        adjusteHandlerPos();
    }
    else if (change == ItemSceneHasChanged)
    {
        if (!scene()) //This is removed from scene, then we deselect this, and so, the handlers is also removed.
        {
            setSelected(false);
        }
    }

    return QGraphicsItem::itemChange(change, value);
}

/**
    @brief QetShapeItem::sceneEventFilter
    @param watched
    @param event
    @return
*/
bool QetShapeItem::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
{
        //Watched must be an handler
    if(watched->type() == QetGraphicsHandlerItem::Type)
    {
        QetGraphicsHandlerItem *qghi = qgraphicsitem_cast<QetGraphicsHandlerItem *>(watched);

        if(m_handler_vector.contains(qghi)) //Handler must be in m_vector_index, then we can start resize
        {
            m_vector_index = m_handler_vector.indexOf(qghi);
            if (m_vector_index != -1)
            {
                if(event->type() == QEvent::GraphicsSceneMousePress) //Click
                {
                    handlerMousePressEvent();
                    return true;
                }
                else if(event->type() == QEvent::GraphicsSceneMouseMove) //Move
                {
                    handlerMouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
                    return true;
                }
                else if (event->type() == QEvent::GraphicsSceneMouseRelease) //Release
                {
                    handlerMouseReleaseEvent();
                    return true;
                }
            }
        }
    }

    return false;
}

/**
    @brief QetShapeItem::contextMenuEvent
    @param event
*/
void QetShapeItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
{
    m_context_menu_pos = event->pos();

    if (m_shapeType == QetShapeItem::Polygon)
    {
        if (diagram()->selectedItems().isEmpty()) {
            this->setSelected(true);
        }

        if (isSelected() && scene()->selectedItems().size() == 1)
        {
            if (diagram())
            {
                DiagramView *d_view = nullptr;
                for (QGraphicsView *view : diagram()->views())
                {
                    if (view->isActiveWindow())
                    {
                        d_view = dynamic_cast<DiagramView *>(view);
                        if (d_view)
                            continue;
                    }
                }

                if (d_view)
                {
                    QScopedPointer<QMenu> menu(new QMenu());
                    menu.data()->addAction(m_insert_point);

                    if (m_handler_vector.count() > 2)
                    {
                        for (QetGraphicsHandlerItem *qghi : m_handler_vector)
                        {
                            if (qghi->contains(qghi->mapFromScene(event->scenePos())))
                            {
                                menu.data()->addAction(m_remove_point);
                                break;
                            }
                        }
                    }

                    menu.data()->addSeparator();
                    menu.data()->addActions(d_view->contextMenuActions());
                    menu.data()->exec(event->screenPos());
                    event->accept();
                    return;
                }
            }
        }
    }

    QetGraphicsItem::contextMenuEvent(event);
}

/**
    @brief QetShapeItem::switchResizeMode
*/
void QetShapeItem::switchResizeMode()
{
    if (m_shapeType == Ellipse)
    {
        if (m_resize_mode == 1)
        {
            m_resize_mode = 2;
            for (QetGraphicsHandlerItem *qghi : m_handler_vector) {
                qghi->setColor(Qt::darkGreen);
            }
        }
        else
        {
            m_resize_mode = 1;
            for (QetGraphicsHandlerItem *qghi : m_handler_vector) {
                qghi->setColor(Qt::blue);
            }
        }
    }
    else if (m_shapeType == Rectangle)
    {
        if (m_resize_mode == 1)
        {
            m_resize_mode = 2;
            for (QetGraphicsHandlerItem *qghi : m_handler_vector)
                qghi->setColor(Qt::darkGreen);
        }
        else if (m_resize_mode == 2)
        {
            m_resize_mode = 3;
            qDeleteAll(m_handler_vector);
            m_handler_vector.clear();
            addHandler();
            for (QetGraphicsHandlerItem *qghi : m_handler_vector) {
                qghi->setColor(Qt::magenta);
            }
        }
        else if (m_resize_mode == 3)
        {
            m_resize_mode = 1;
            qDeleteAll(m_handler_vector);
            m_handler_vector.clear();
            addHandler();
            for (QetGraphicsHandlerItem *qghi : m_handler_vector) {
                qghi->setColor(Qt::blue);
            }

        }
    }
}

void QetShapeItem::addHandler()
{
    if (m_handler_vector.isEmpty())
    {
        QVector <QPointF> points_vector;
        switch (m_shapeType)
        {
            case Line:
                points_vector << m_P1 << m_P2;
                break;
            case Rectangle:
                if (m_resize_mode == 3) {
                    points_vector = QetGraphicsHandlerUtility::pointForRadiusRect(QRectF(m_P1, m_P2), m_xRadius, m_yRadius);
                }
                else {
                    points_vector = QetGraphicsHandlerUtility::pointsForRect(QRectF(m_P1, m_P2));
                }
                break;
            case Ellipse:
                points_vector = QetGraphicsHandlerUtility::pointsForRect(QRectF(m_P1, m_P2));
                break;
            case Polygon:
                points_vector = m_polygon;
                break;
        }

        if(!points_vector.isEmpty() && scene())
        {
            m_handler_vector = QetGraphicsHandlerItem::handlerForPoint(mapToScene(points_vector));

            for(QetGraphicsHandlerItem *handler : m_handler_vector)
            {
                handler->setZValue(this->zValue()+1);
                handler->setColor(Qt::blue);
                scene()->addItem(handler);
                handler->installSceneEventFilter(this);
            }
        }
    }
}

/**
    @brief QetShapeItem::adjusteHandlerPos
    Adjust the position of the handler item
*/
void QetShapeItem::adjusteHandlerPos()
{
    if (m_handler_vector.isEmpty()) {
        return;
    }

    QVector <QPointF> points_vector;
    switch (m_shapeType)
    {
        case Line: {
            points_vector << m_P1 << m_P2;
            break;
        }
        case Rectangle: {
            if (m_resize_mode != 3) {
                points_vector = QetGraphicsHandlerUtility::pointsForRect(QRectF(m_P1, m_P2));
            }
            else {
                points_vector = QetGraphicsHandlerUtility::pointForRadiusRect(QRectF(m_P1, m_P2), m_xRadius, m_yRadius);
            }
            break;
        }
        case Ellipse: {
            points_vector = QetGraphicsHandlerUtility::pointsForRect(QRectF(m_P1, m_P2));
            break;
        }
        case Polygon: {
            points_vector = m_polygon;
            break;
        }
    }

    if (m_handler_vector.size() == points_vector.size())
    {
        points_vector = mapToScene(points_vector);
        for (int i = 0 ; i < points_vector.size() ; ++i)
            m_handler_vector.at(i)->setPos(points_vector.at(i));
    }
    else
    {
        qDeleteAll(m_handler_vector);
        m_handler_vector.clear();
        addHandler();
    }
}

void QetShapeItem::insertPoint()
{
    if (m_shapeType == QetShapeItem::Polygon)
    {
        QPolygonF new_polygon = QetGraphicsHandlerUtility::polygonForInsertPoint(this->polygon(), m_closed, Diagram::snapToGrid(m_context_menu_pos));

        if(new_polygon != m_polygon)
        {
                //Wrap the undo for avoid to merge the undo commands when user add several points.
            QUndoCommand *undo = new QUndoCommand(tr("Ajouter un point ?? un polygone"));
            new QPropertyUndoCommand(this, "polygon", m_polygon, new_polygon, undo);
            diagram()->undoStack().push(undo);
        }
    }
}

void QetShapeItem::removePoint()
{
    if (m_shapeType != QetShapeItem::Polygon) {
        return;
    }

    if (m_handler_vector.size() == 2) {
        return;
    }

    QPointF point = mapToScene(m_context_menu_pos);
    int index = -1;
    for (int i=0 ; i<m_handler_vector.size() ; i++)
    {
        QetGraphicsHandlerItem *qghi = m_handler_vector.at(i);
        if (qghi->contains(qghi->mapFromScene(point)))
        {
            index = i;
            break;
        }
    }
    if (index > -1 && index<m_handler_vector.count())
    {
        QPolygonF polygon = this->polygon();
        polygon.removeAt(index);

            //Wrap the undo for avoid to merge the undo commands when user add several points.
        QUndoCommand *undo = new QUndoCommand(tr("Supprimer un point d'un polygone"));
        new QPropertyUndoCommand(this, "polygon", this->polygon(), polygon, undo);
        diagram()->undoStack().push(undo);
    }
}

/**
    @brief QetShapeItem::handlerMousePressEvent
    @param qghi
    @param event
*/
void QetShapeItem::handlerMousePressEvent()
{
    m_old_P1 = m_P1;
    m_old_P2 = m_P2;
    m_old_polygon = m_polygon;
    m_old_xRadius = m_xRadius;
    m_old_yRadius = m_yRadius;
    if(m_xRadius == 0 && m_yRadius == 0) {
        m_modifie_radius_equaly = true;
    }
}

/**
    @brief QetShapeItem::handlerMouseMoveEvent
    @param event
*/
void QetShapeItem::handlerMouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    QPointF new_pos = event->scenePos();
    if (event->modifiers() != Qt::ControlModifier)
        new_pos = Diagram::snapToGrid(event->scenePos());
    new_pos = mapFromScene(new_pos);

    switch (m_shapeType)
    {
        case Line:
            prepareGeometryChange();
            m_vector_index == 0 ? m_P1 = new_pos : m_P2 = new_pos;
            adjusteHandlerPos();
            break;

        case Rectangle:
            if (m_resize_mode == 1) {
                setRect(QetGraphicsHandlerUtility::rectForPosAtIndex(QRectF(m_P1, m_P2), new_pos, m_vector_index));
                break;
            }
            else if (m_resize_mode == 2) {
                setRect(QetGraphicsHandlerUtility::mirrorRectForPosAtIndex(QRectF(m_P1, m_P2), new_pos, m_vector_index));
                break;
            }
            else {
                qreal radius = QetGraphicsHandlerUtility::radiusForPosAtIndex(QRectF(m_P1, m_P2), new_pos, m_vector_index);
                if(m_modifie_radius_equaly) {
                    setXRadius(radius);
                    setYRadius(radius);
                }
                else if(m_vector_index == 0) {
                    setXRadius(radius);
                }
                else {
                    setYRadius(radius);
                }
                adjusteHandlerPos();
                break;
            }
        case Ellipse:
            if (m_resize_mode == 1) {
                setRect(QetGraphicsHandlerUtility::rectForPosAtIndex(QRectF(m_P1, m_P2), new_pos, m_vector_index));
                break;
            }
            else {
                setRect(QetGraphicsHandlerUtility::mirrorRectForPosAtIndex(QRectF(m_P1, m_P2), new_pos, m_vector_index));
                break;
            }

        case Polygon:
            prepareGeometryChange();
            m_polygon.replace(m_vector_index, new_pos);
            adjusteHandlerPos();
            break;
    }    //End switch
}

/**
    @brief QetShapeItem::handlerMouseReleaseEvent
    @param qghi
    @param event
*/
void QetShapeItem::handlerMouseReleaseEvent()
{
    m_modifie_radius_equaly = false;

    if (diagram())
    {
        QPropertyUndoCommand *undo = nullptr;
        if ((m_shapeType & (Line | Rectangle | Ellipse)) && ((m_P1 != m_old_P1 || m_P2 != m_old_P2) ||
                                                             (m_old_xRadius != XRadius() || m_old_yRadius != m_yRadius))
            )
        {
            switch(m_shapeType)
            {
                case Line: {
                    undo = new QPropertyUndoCommand(this, "line",QLineF(m_old_P1, m_old_P2), QLineF(m_P1, m_P2));
                    break;
                }
                case Rectangle: {
                    if (m_resize_mode == 1 || m_resize_mode == 2) {
                        undo = new QPropertyUndoCommand(this, "rect",QRectF(m_old_P1, m_old_P2), QRectF(m_P1, m_P2).normalized());
                    }
                    else if (m_resize_mode == 3)
                    {
                        undo = new QPropertyUndoCommand(this, "xRadius", m_old_xRadius, m_xRadius);
                        QPropertyUndoCommand *undo_ = new QPropertyUndoCommand(this, "yRadius", m_old_yRadius, m_yRadius, undo);
                        undo_->setAnimated();
                    }
                    break;
                }
                case Ellipse: {
                    undo = new QPropertyUndoCommand(this, "rect",QRectF(m_old_P1, m_old_P2), QRectF(m_P1, m_P2).normalized());
                    break;
                }
                case Polygon: break;
            }
            if (undo) {
                undo->setAnimated(true, false);
            }
        }
        else if (m_shapeType == Polygon && (m_polygon != m_old_polygon))
            undo = new QPropertyUndoCommand(this, "polygon", m_old_polygon, m_polygon);

        if(undo)
        {
            undo->setText(tr("Modifier %1").arg(name()));
            diagram()->undoStack().push(undo);
        }
    }
}

// TODO: inherit from Propertiesinterface!
/**
    @brief QetShapeItem::fromXml
    Build this item from the xml description
    @param e element where is stored this item
    @return true if load success
*/
bool QetShapeItem::fromXml(const QDomElement &e)
{
    if (e.tagName() != "shape") return (false);

    is_movable_ = (e.attribute("is_movable").toInt());
    m_closed = e.attribute("closed", "0").toInt();
    m_pen = QETXML::penFromXml(e.firstChildElement("pen"));
    m_brush = QETXML::brushFromXml(e.firstChildElement("brush"));

    QString type = e.attribute("type");
#if TODO_LIST
#pragma message("@TODO Compatibility for version older than N??4075, shape type was stored with an int")
#endif
        //@TODO Compatibility for version older than N??4075, shape type was stored with an int
    if (type.size() == 1)
    {
        switch(e.attribute("type","0").toInt())
        {
            case 0: m_shapeType = Line;      break;
            case 1: m_shapeType = Rectangle; break;
            case 2: m_shapeType = Ellipse;   break;
            case 3: m_shapeType = Polygon;  break;
        }
    }
        //For version after N??4075, shape is stored with a string
    else
    {
        QMetaEnum me = metaObject()->enumerator(metaObject()->indexOfEnumerator("ShapeType"));
        m_shapeType = QetShapeItem::ShapeType(me.keysToValue(type.toStdString().data()));
    }

    if (m_shapeType != Polygon)
    {
        m_P1.setX(e.attribute("x1", nullptr).toDouble());
        m_P1.setY(e.attribute("y1", nullptr).toDouble());
        m_P2.setX(e.attribute("x2", nullptr).toDouble());
        m_P2.setY(e.attribute("y2", nullptr).toDouble());

        if (m_shapeType == Rectangle)
        {
            setXRadius(e.attribute("rx", "0").toDouble());
            setYRadius(e.attribute("ry", "0").toDouble());
        }
    }
    else {
        for(const QDomElement& de : QET::findInDomElement(e, "points", "point")) {
            m_polygon << QPointF(de.attribute("x", nullptr).toDouble(), de.attribute("y", nullptr).toDouble());
        }
    }
    setZValue(e.attribute("z", QString::number(this->zValue())).toDouble());

    return (true);
}

/**
    @brief QetShapeItem::toXml
    Save this item to xml element
    @param document parent document xml
    @return element xml where is write this item
*/
QDomElement QetShapeItem::toXml(QDomDocument &document) const
{
    QDomElement result = document.createElement("shape");

        //write some attribute
    QMetaEnum me = metaObject()->enumerator(metaObject()->indexOfEnumerator("ShapeType"));
    result.setAttribute("type", me.valueToKey(m_shapeType));
    result.appendChild(QETXML::penToXml(document, m_pen));
    result.appendChild(QETXML::brushToXml(document, m_brush));
    result.setAttribute("is_movable", bool(is_movable_));
    result.setAttribute("closed", bool(m_closed));

    if (m_shapeType != Polygon)
    {
        result.setAttribute("x1", QString::number(mapToScene(m_P1).x()));
        result.setAttribute("y1", QString::number(mapToScene(m_P1).y()));
        result.setAttribute("x2", QString::number(mapToScene(m_P2).x()));
        result.setAttribute("y2", QString::number(mapToScene(m_P2).y()));

        if (m_shapeType == Rectangle)
        {
            QRectF rect(m_P1, m_P2);
            rect = rect.normalized();
            qreal x = m_xRadius;
            if (x > rect.width()/2) {
                x = rect.width()/2;
            }
            qreal y = m_yRadius;
            if (y > rect.height()/2) {
                y = rect.height()/2;
            }

            result.setAttribute("rx", QString::number(m_xRadius));
            result.setAttribute("ry", QString::number(m_yRadius));
        }
    }
    else
    {
        QDomElement points = document.createElement("points");
        for (QPointF p : m_polygon)
        {
            QDomElement point = document.createElement("point");
            QPointF pf = mapToScene(p);
            point.setAttribute("x", QString::number(pf.x()));
            point.setAttribute("y", QString::number(pf.y()));
            points.appendChild(point);
        }
        result.appendChild(points);
    }
    result.setAttribute("z", QString::number(this->zValue()));

    return(result);
}

/**
    @brief QetShapeItem::toDXF
    Draw this element to the dxf document
    @param filepath file path of the the dxf document
    @param pen
    @return true if draw success
*/
bool QetShapeItem::toDXF(const QString &filepath,const QPen &pen)
{

    switch (m_shapeType)
    {
        case Line:
        Createdxf::drawLine(filepath,
            QLineF( mapToScene(m_P1),
                mapToScene(m_P2)),
                Createdxf::dxfColor(pen));
        return true;
        case Rectangle:
        Createdxf::drawRectangle(filepath,
             QRectF(mapToScene(m_P1),
                mapToScene(m_P2)).normalized(),
                Createdxf::dxfColor(pen));
        return true;
        case Ellipse:
        Createdxf::drawEllipse(filepath,
             QRectF(mapToScene(m_P1),
                mapToScene(m_P2)).normalized(),
                Createdxf::dxfColor(pen));
        return true;
    case Polygon:
        Createdxf::drawPolygon(filepath,m_polygon,Createdxf::dxfColor(pen));
        return true;
    default:
        return false;
    }
}

/**
    @brief QetShapeItem::editProperty
    Edit the property of this item
*/
void QetShapeItem::editProperty()
{
    if (diagram() -> isReadOnly()) return;

    PropertiesEditorDialog ped(new ShapeGraphicsItemPropertiesWidget(this), diagram()->views().at(0));
    ped.exec();
}

/**
    @brief QetShapeItem::name
    @return the name of the curent shape.
*/
QString QetShapeItem::name() const
{
    switch (m_shapeType) {
        case Line:        return tr("une ligne");
        case Rectangle:    return tr("un rectangle");
        case Ellipse:    return tr("une ??llipse");
        case Polygon:    return tr("une polyligne");
        default:        return tr("une shape");
    }
}