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00d5cc245a
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@158 ebee16cc-31ac-478f-84a7-5cbb03baadba
132 lines
3.6 KiB
C++
132 lines
3.6 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#ifndef QAGGREGATION_H
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#define QAGGREGATION_H
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#include "aggregation_global.h"
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#include <QtCore/QObject>
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#include <QtCore/QList>
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#include <QtCore/QHash>
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#include <QtCore/QReadWriteLock>
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#include <QtCore/QReadLocker>
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namespace Aggregation {
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class AGGREGATION_EXPORT Aggregate : public QObject
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{
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Q_OBJECT
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public:
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Aggregate(QObject *parent = 0);
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virtual ~Aggregate();
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void add(QObject *component);
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void remove(QObject *component);
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template <typename T> T *component() {
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QReadLocker(&lock());
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foreach (QObject *component, m_components) {
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if (T *result = qobject_cast<T *>(component))
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return result;
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}
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return (T *)0;
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}
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template <typename T> QList<T *> components() {
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QReadLocker(&lock());
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QList<T *> results;
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foreach (QObject *component, m_components) {
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if (T *result = qobject_cast<T *>(component)) {
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results << result;
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}
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}
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return results;
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}
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static Aggregate *parentAggregate(QObject *obj);
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static QReadWriteLock &lock();
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private slots:
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void deleteSelf(QObject *obj);
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private:
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static QHash<QObject *, Aggregate *> &aggregateMap();
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QList<QObject *> m_components;
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};
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// get a component via global template function
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template <typename T> T *query(Aggregate *obj)
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{
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if (!obj)
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return (T *)0;
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return obj->template component<T>();
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}
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template <typename T> T *query(QObject *obj)
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{
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if (!obj)
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return (T *)0;
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T *result = qobject_cast<T *>(obj);
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if (!result) {
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QReadLocker(&lock());
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Aggregate *parentAggregation = Aggregate::parentAggregate(obj);
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result = (parentAggregation ? query<T>(parentAggregation) : 0);
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}
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return result;
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}
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// get all components of a specific type via template function
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template <typename T> QList<T *> query_all(Aggregate *obj)
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{
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if (!obj)
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return QList<T *>();
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return obj->template components<T>();
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}
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template <typename T> QList<T *> query_all(QObject *obj)
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{
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if (!obj)
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return QList<T *>();
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QReadLocker(&lock());
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Aggregate *parentAggregation = Aggregate::parentAggregate(obj);
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QList<T *> results;
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if (parentAggregation)
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results = query_all<T>(parentAggregation);
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else if (T *result = qobject_cast<T *>(obj))
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results.append(result);
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return results;
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}
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} // namespace Aggregation
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#endif // QAGGREGATION_H
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