slaveelement.cpp

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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/>.
*/
#include "slaveelement.h"
#include "diagramposition.h"
#include "qetapp.h"
#include "diagram.h"
#include "dynamicelementtextitem.h"

SlaveElement::SlaveElement(const ElementsLocation &location, QGraphicsItem *qgi, int *state) :
    Element(location, qgi, state, Element::Slave)
{
    m_xref_item = nullptr;
}

SlaveElement::~SlaveElement() {
    unlinkAllElements();
}

void SlaveElement::linkToElement(Element *elmt)
{
        // check if element is master and if isn't already linked
    if (elmt->linkType() == Master && !connected_elements.contains(elmt))
    {
        if(!isFree())
            unlinkAllElements();

        connected_elements << elmt;

        elmt -> linkToElement(this);
        emit linkedElementChanged();
    }
}

void SlaveElement::unlinkAllElements()
{
        // if this element is free no need to do something
    if (!isFree())
    {
        foreach(Element *elmt, connected_elements)
            unlinkElement(elmt);
        emit linkedElementChanged();
    }
}

void SlaveElement::unlinkElement(Element *elmt)
{
        //Ensure elmt is linked to this element
    if (connected_elements.contains(elmt))
    {
        connected_elements.removeOne(elmt);

        elmt -> unlinkElement  (this) ;
        elmt -> setHighlighted (false);
        emit linkedElementChanged();
    }
}