qgimanager.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 "qgimanager.h"

QGIManager::QGIManager(QGraphicsScene *sc) :
    scene(sc),
    destroy_qgi_on_delete(true)
{
}

QGIManager::~QGIManager(){
    if (!destroy_qgi_on_delete) return;
    foreach(QGraphicsItem *qgi, qgi_manager.keys()) {
        if (!scene -> items().contains(qgi)) delete qgi;
    }
}

void QGIManager::manage(QGraphicsItem *qgi) {
    if (qgi -> parentItem()) return;
    if (qgi_manager.contains(qgi)) ++ qgi_manager[qgi];
    else qgi_manager.insert(qgi, 1);
}

void QGIManager::release(QGraphicsItem *qgi) {
    if (!qgi_manager.contains(qgi)) return;
    -- qgi_manager[qgi];
    if (qgi_manager[qgi] <= 0 && !(scene -> items().contains(qgi))) {
        delete qgi;
        qgi_manager.remove(qgi);
    }
}

void QGIManager::manage(const QList<QGraphicsItem *> &qgis) {
    foreach(QGraphicsItem *qgi, qgis) manage(qgi);
}

void QGIManager::release(const QList<QGraphicsItem *> &qgis) {
    foreach(QGraphicsItem *qgi, qgis) release(qgi);
}

void QGIManager::setDestroyQGIOnDelete(bool b) {
    destroy_qgi_on_delete = b;
}

bool QGIManager::manages(QGraphicsItem *qgi) const {
    return(qgi_manager.contains(qgi));
}