qabstractproxymodel.cpp

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qabstractproxymodel.h"

#ifndef QT_NO_PROXYMODEL

#include "qitemselectionmodel.h"
#include <private/qabstractproxymodel_p.h>
#include <QtCore/QSize>
#include <QtCore/QStringList>


QT_BEGIN_NAMESPACE

//detects the deletion of the source model
void QAbstractProxyModelPrivate::_q_sourceModelDestroyed()
{
    model = QAbstractItemModelPrivate::staticEmptyModel();
}

QAbstractProxyModel::QAbstractProxyModel(QObject *parent)
    :QAbstractItemModel(*new QAbstractProxyModelPrivate, parent)
{
    setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
}

QAbstractProxyModel::QAbstractProxyModel(QAbstractProxyModelPrivate &dd, QObject *parent)
    : QAbstractItemModel(dd, parent)
{
    setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
}

QAbstractProxyModel::~QAbstractProxyModel()
{

}

void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
{
    Q_D(QAbstractProxyModel);
    if (d->model)
        disconnect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));

    if (sourceModel) {
        d->model = sourceModel;
        connect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));
    } else {
        d->model = QAbstractItemModelPrivate::staticEmptyModel();
    }
    d->roleNames = d->model->roleNames();
}

QAbstractItemModel *QAbstractProxyModel::sourceModel() const
{
    Q_D(const QAbstractProxyModel);
    if (d->model == QAbstractItemModelPrivate::staticEmptyModel())
        return 0;
    return d->model;
}

bool QAbstractProxyModel::submit()
{
    Q_D(QAbstractProxyModel);
    return d->model->submit();
}

void QAbstractProxyModel::revert()
{
    Q_D(QAbstractProxyModel);
    d->model->revert();
}


QItemSelection QAbstractProxyModel::mapSelectionToSource(const QItemSelection &proxySelection) const
{
    QModelIndexList proxyIndexes = proxySelection.indexes();
    QItemSelection sourceSelection;
    for (int i = 0; i < proxyIndexes.size(); ++i) {
        const QModelIndex proxyIdx = mapToSource(proxyIndexes.at(i));
        if (!proxyIdx.isValid())
            continue;
        sourceSelection << QItemSelectionRange(proxyIdx);
    }
    return sourceSelection;
}

QItemSelection QAbstractProxyModel::mapSelectionFromSource(const QItemSelection &sourceSelection) const
{
    QModelIndexList sourceIndexes = sourceSelection.indexes();
    QItemSelection proxySelection;
    for (int i = 0; i < sourceIndexes.size(); ++i) {
        const QModelIndex srcIdx = mapFromSource(sourceIndexes.at(i));
        if (!srcIdx.isValid())
            continue;
        proxySelection << QItemSelectionRange(srcIdx);
    }
    return proxySelection;
}

QVariant QAbstractProxyModel::data(const QModelIndex &proxyIndex, int role) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->data(mapToSource(proxyIndex), role);
}

QVariant QAbstractProxyModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    Q_D(const QAbstractProxyModel);
    int sourceSection;
    if (orientation == Qt::Horizontal) {
        const QModelIndex proxyIndex = index(0, section);
        sourceSection = mapToSource(proxyIndex).column();
    } else {
        const QModelIndex proxyIndex = index(section, 0);
        sourceSection = mapToSource(proxyIndex).row();
    }
    return d->model->headerData(sourceSection, orientation, role);
}

QMap<int, QVariant> QAbstractProxyModel::itemData(const QModelIndex &proxyIndex) const
{
    return QAbstractItemModel::itemData(proxyIndex);
}

Qt::ItemFlags QAbstractProxyModel::flags(const QModelIndex &index) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->flags(mapToSource(index));
}

bool QAbstractProxyModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    Q_D(QAbstractProxyModel);
    return d->model->setData(mapToSource(index), value, role);
}

bool QAbstractProxyModel::setItemData(const QModelIndex &index, const QMap< int, QVariant >& roles)
{
    return QAbstractItemModel::setItemData(index, roles);
}

bool QAbstractProxyModel::setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role)
{
    Q_D(QAbstractProxyModel);
    int sourceSection;
    if (orientation == Qt::Horizontal) {
        const QModelIndex proxyIndex = index(0, section);
        sourceSection = mapToSource(proxyIndex).column();
    } else {
        const QModelIndex proxyIndex = index(section, 0);
        sourceSection = mapToSource(proxyIndex).row();
    }
    return d->model->setHeaderData(sourceSection, orientation, value, role);
}

QModelIndex QAbstractProxyModel::buddy(const QModelIndex &index) const
{
    Q_D(const QAbstractProxyModel);
    return mapFromSource(d->model->buddy(mapToSource(index)));
}

bool QAbstractProxyModel::canFetchMore(const QModelIndex &parent) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->canFetchMore(mapToSource(parent));
}

void QAbstractProxyModel::fetchMore(const QModelIndex &parent)
{
    Q_D(QAbstractProxyModel);
    d->model->fetchMore(mapToSource(parent));
}

void QAbstractProxyModel::sort(int column, Qt::SortOrder order)
{
    Q_D(QAbstractProxyModel);
    d->model->sort(column, order);
}

QSize QAbstractProxyModel::span(const QModelIndex &index) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->span(mapToSource(index));
}

bool QAbstractProxyModel::hasChildren(const QModelIndex &parent) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->hasChildren(mapToSource(parent));
}

QMimeData* QAbstractProxyModel::mimeData(const QModelIndexList &indexes) const
{
    Q_D(const QAbstractProxyModel);
    QModelIndexList list;
    foreach(const QModelIndex &index, indexes)
        list << mapToSource(index);
    return d->model->mimeData(list);
}

QStringList QAbstractProxyModel::mimeTypes() const
{
    Q_D(const QAbstractProxyModel);
    return d->model->mimeTypes();
}

Qt::DropActions QAbstractProxyModel::supportedDropActions() const
{
    Q_D(const QAbstractProxyModel);
    return d->model->supportedDropActions();
}

QT_END_NAMESPACE

#include "moc_qabstractproxymodel.cpp"

#endif // QT_NO_PROXYMODEL