/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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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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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qproxymodel.h"+
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+
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#ifndef QT_NO_PROXYMODEL+
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#include <private/qproxymodel_p.h>+
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#include <qsize.h>+
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#include <qstringlist.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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/*!+
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    \class QProxyModel+
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    \obsolete+
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    \brief The QProxyModel class provides support for processing data+
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    passed between another model and a view.+
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+
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    \ingroup model-view+
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+
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    If you want to do filtering and sorting, see QSortFilterProxyModel.+
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+
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    Proxy models provide a standard model interface that can be used to+
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    manipulate the data retrieved through an underlying model. They can be used to+
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    perform operations such as sorting and filtering on the data obtained without+
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    changing the contents of the model.+
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+
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    Just as with subclasses of QAbstractItemView, QProxyModel provides the setModel()+
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    function that is used to specify the model to be acted on by the proxy.+
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    Views can be connected to either the underlying model or the proxy model with+
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    \l QAbstractItemView::setModel().+
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+
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    Since views rely on the information provided in model indexes to identify+
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    items of data from models, and to position these items in some visual+
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    representation, proxy models must create their own model indexes instead of+
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    supplying model indexes from their underlying models.+
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+
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    \sa \link model-view-programming.html Model/View Programming\endlink QAbstractItemModel+
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+
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*/+
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+
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/*!+
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    Constructs a proxy model with the given \a parent.+
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*/+
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+
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QProxyModel::QProxyModel(QObject *parent)+
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    : QAbstractItemModel(*new QProxyModelPrivate, parent)+
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{+
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    Q_D(QProxyModel);+
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    setModel(&d->empty);+
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}+
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+
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/*!+
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    \internal+
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*/+
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QProxyModel::QProxyModel(QProxyModelPrivate &dd, QObject *parent)+
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    : QAbstractItemModel(dd, parent)+
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{+
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    Q_D(QProxyModel);+
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    setModel(&d->empty);+
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}+
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+
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/*!+
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    Destroys the proxy model.+
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*/+
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QProxyModel::~QProxyModel()+
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{+
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}+
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+
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/*!+
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    Sets the given \a model to be processed by the proxy model.+
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*/+
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void QProxyModel::setModel(QAbstractItemModel *model)+
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{+
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    Q_D(QProxyModel);+
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    if (d->model && d->model != &d->empty)+
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        disconnectFromModel(d->model);+
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    if (model) {+
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        d->model = model;+
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        connectToModel(model);+
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    } else {+
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        d->model = &d->empty;+
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    }+
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}+
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+
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/*!+
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    Returns the model that contains the data that is available through the+
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    proxy model.+
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*/+
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QAbstractItemModel *QProxyModel::model() const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model;+
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}+
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+
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/*!+
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    Returns the model index with the given \a row, \a column, and \a parent.+
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+
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    \sa QAbstractItemModel::index()+
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*/+
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QModelIndex QProxyModel::index(int row, int column, const QModelIndex &parent) const+
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{+
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    Q_D(const QProxyModel);+
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    return setProxyModel(d->model->index(row, column, setSourceModel(parent)));+
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}+
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+
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/*!+
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    Returns the model index that corresponds to the parent of the given \a child+
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    index.+
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*/+
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QModelIndex QProxyModel::parent(const QModelIndex &child) const+
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{+
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    Q_D(const QProxyModel);+
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    return setProxyModel(d->model->parent(setSourceModel(child)));+
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}+
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+
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/*!+
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    Returns the number of rows for the given \a parent.+
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+
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    \sa QAbstractItemModel::rowCount()+
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*/+
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int QProxyModel::rowCount(const QModelIndex &parent) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->rowCount(setSourceModel(parent));+
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}+
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+
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/*!+
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    Returns the number of columns for the given \a parent.+
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+
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    \sa QAbstractItemModel::columnCount()+
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*/+
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int QProxyModel::columnCount(const QModelIndex &parent) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->columnCount(setSourceModel(parent));+
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}+
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+
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/*!+
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    Returns true if the item corresponding to the \a parent index has child+
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    items; otherwise returns false.+
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+
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    \sa QAbstractItemModel::hasChildren()+
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*/+
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bool QProxyModel::hasChildren(const QModelIndex &parent) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->hasChildren(setSourceModel(parent));+
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}+
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+
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/*!+
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    Returns the data stored in the item with the given \a index under the+
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    specified \a role.+
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*/+
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QVariant QProxyModel::data(const QModelIndex &index, int role) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->data(setSourceModel(index), role);+
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}+
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+
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/*!+
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    Sets the \a role data for the item at \a index to \a value.+
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    Returns true if successful; otherwise returns false.+
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+
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    The base class implementation returns false. This function and+
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    data() must be reimplemented for editable models.+
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+
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    \sa data() itemData() QAbstractItemModel::setData()+
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*/+
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bool QProxyModel::setData(const QModelIndex &index, const QVariant &value, int role)+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->setData(setSourceModel(index), value, role);+
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}+
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+
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/*!+
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    Returns the data stored in the \a section of the header with specified+
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    \a orientation under the given \a role.+
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*/+
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QVariant QProxyModel::headerData(int section, Qt::Orientation orientation, int role) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->headerData(section, orientation, role);+
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}+
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+
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/*!+
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    Sets the \a role data in the \a section of the header with the specified+
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    \a orientation to the \a value given.+
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+
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    \sa QAbstractItemModel::setHeaderData()+
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*/+
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bool QProxyModel::setHeaderData(int section, Qt::Orientation orientation,+
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                                const QVariant &value, int role)+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->setHeaderData(section, orientation, value, role);+
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}+
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+
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/*!+
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    Returns a list of MIME types that are supported by the model.+
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*/+
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QStringList QProxyModel::mimeTypes() const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->mimeTypes();+
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}+
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+
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/*!+
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    Returns MIME data for the specified \a indexes in the model.+
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*/+
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QMimeData *QProxyModel::mimeData(const QModelIndexList &indexes) const+
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{+
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    Q_D(const QProxyModel);+
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    QModelIndexList lst;+
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    for (int i = 0; i < indexes.count(); ++i)+
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        lst.append(setSourceModel(indexes.at(i)));+
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    return d->model->mimeData(lst);+
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}+
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+
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/*!+
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    Returns true if the model accepts the \a data dropped onto an attached+
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    view for the specified \a action; otherwise returns false.+
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+
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    The \a parent, \a row, and \a column details can be used to control+
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    which MIME types are acceptable to different parts of a model when+
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    received via the drag and drop system.+
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*/+
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bool QProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action,+
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                               int row, int column, const QModelIndex &parent)+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->dropMimeData(data, action, row, column, setSourceModel(parent));+
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}+
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+
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/*!+
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    Returns the drop actions that are supported by the model; this is+
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    a combination of the individual actions defined in \l Qt::DropActions.+
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+
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    The selection of drop actions provided by the model will influence the+
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    behavior of the component that started the drag and drop operation.+
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+
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    \sa \link dnd.html Drag and Drop\endlink+
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*/+
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Qt::DropActions QProxyModel::supportedDropActions() const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->supportedDropActions();+
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}+
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+
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/*!+
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    Inserts \a count rows into the model, creating new items as children of+
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    the given \a parent. The new rows are inserted before the \a row+
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    specified. If the \a parent item has no children, a single column is+
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    created to contain the required number of rows.+
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+
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    Returns true if the rows were successfully inserted; otherwise+
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    returns false.+
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+
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    \sa QAbstractItemModel::insertRows()*/+
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bool QProxyModel::insertRows(int row, int count, const QModelIndex &parent)+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->insertRows(row, count, setSourceModel(parent));+
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}+
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+
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/*!+
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    Inserts \a count columns into the model, creating new items as children of+
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    the given \a parent. The new columns are inserted before the \a column+
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    specified. If the \a parent item has no children, a single row is created+
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    to contain the required number of columns.+
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+
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    Returns true if the columns were successfully inserted; otherwise+
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    returns false.+
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+
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    \sa QAbstractItemModel::insertColumns()+
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*/+
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bool QProxyModel::insertColumns(int column, int count, const QModelIndex &parent)+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->insertColumns(column, count, setSourceModel(parent));+
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}+
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+
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/*!+
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    Fetches more child items of the given \a parent. This function is used by views+
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    to tell the model that they can display more data than the model has provided.+
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+
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    \sa QAbstractItemModel::fetchMore()+
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*/+
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void QProxyModel::fetchMore(const QModelIndex &parent)+
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{+
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    Q_D(const QProxyModel);+
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    d->model->fetchMore(parent);+
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}+
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+
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/*!+
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    Returns the item flags for the given \a index.+
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*/+
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Qt::ItemFlags QProxyModel::flags(const QModelIndex &index) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->flags(setSourceModel(index));+
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}+
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+
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/*!+
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    Sorts the child items in the specified \a column according to the sort+
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    order defined by \a order.+
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+
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    \sa QAbstractItemModel::sort()+
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*/+
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void QProxyModel::sort(int column, Qt::SortOrder order)+
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{+
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    Q_D(QProxyModel);+
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    d->model->sort(column, order);+
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}+
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+
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/*!+
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    Returns a list of model indexes that each contain the given \a value for+
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    the \a role specified. The search begins at the \a start index and is+
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    performed according to the specified \a flags. The search continues until+
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    the number of matching data items equals \a hits, the last row is reached,+
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    or the search reaches \a start again, depending on whether \c MatchWrap is+
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    specified in \a flags.+
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+
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    \sa QAbstractItemModel::match()+
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*/+
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QModelIndexList QProxyModel::match(const QModelIndex &start,+
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                                   int role, const QVariant &value,+
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                                   int hits, Qt::MatchFlags flags) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->match(start, role, value, hits, flags);+
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}+
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+
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/*!+
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    Returns the size of the item that corresponds to the specified \a index.+
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*/+
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QSize QProxyModel::span(const QModelIndex &index) const+
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{+
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    Q_D(const QProxyModel);+
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    return d->model->span(setSourceModel(index));+
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}+
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+
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/*!+
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 */+
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bool QProxyModel::submit()+
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{+
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    Q_D(QProxyModel);+
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    return d->model->submit();+
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}+
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+
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/*!+
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 */+
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void QProxyModel::revert()+
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{+
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    Q_D(QProxyModel);+
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    d->model->revert();+
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}+
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+
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/*!+
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    \internal+
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    Change the model pointer in the given \a source_index to point to the proxy model.+
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 */+
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QModelIndex QProxyModel::setProxyModel(const QModelIndex &source_index) const+
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{+
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    QModelIndex proxy_index = source_index;+
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    if (proxy_index.isValid())+
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        proxy_index.m = this;+
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    return proxy_index;+
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}+
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+
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/*!+
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    \internal+
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    Change the model pointer in the given \a proxy_index to point to the source model.+
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 */+
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QModelIndex QProxyModel::setSourceModel(const QModelIndex &proxy_index) const+
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{+
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    Q_D(const QProxyModel);+
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    QModelIndex source_index = proxy_index;+
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    source_index.m = d->model;+
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    return source_index;+
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}+
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+
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/*!+
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  \internal+
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  Connect to all the signals emitted by given \a model.+
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*/+
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void QProxyModel::connectToModel(const QAbstractItemModel *model) const+
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{+
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    connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),+
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            this, SLOT(_q_sourceDataChanged(QModelIndex,QModelIndex)));+
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    connect(model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),+
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            this, SIGNAL(headerDataChanged(Qt::Orientation,int,int))); // signal to signal+
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    connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceRowsAboutToBeInserted(QModelIndex,int,int)));+
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    connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceRowsInserted(QModelIndex,int,int)));+
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    connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceRowsAboutToBeRemoved(QModelIndex,int,int)));+
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    connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceRowsRemoved(QModelIndex,int,int)));+
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    connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceColumnsAboutToBeInserted(QModelIndex,int,int)));+
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    connect(model, SIGNAL(columnsInserted(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceColumnsInserted(QModelIndex,int,int)));+
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    connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceColumnsAboutToBeRemoved(QModelIndex,int,int)));+
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    connect(model, SIGNAL(columnsRemoved(QModelIndex,int,int)),+
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            this, SLOT(_q_sourceColumnsRemoved(QModelIndex,int,int)));+
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    connect(model, SIGNAL(modelReset()), this, SIGNAL(modelReset())); // signal to signal+
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    connect(model, SIGNAL(layoutAboutToBeChanged()), this, SIGNAL(layoutAboutToBeChanged())); // signal to signal+
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    connect(model, SIGNAL(layoutChanged()), this, SIGNAL(layoutChanged())); // signal to signal+
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}+
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+
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/*!+
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  \internal+
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  Disconnect from all the signals emitted by the given \a model.+
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 */+
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void QProxyModel::disconnectFromModel(const QAbstractItemModel *model) const+
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{+
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    disconnect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),+
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               this, SLOT(_q_sourceDataChanged(QModelIndex,QModelIndex)));+
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    disconnect(model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),+
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               this, SIGNAL(headerDataChanged(Qt::Orientation,int,int))); // signal to signal+
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    disconnect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceRowsAboutToBeInserted(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),+
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               this, SLOT(rowsInserted(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceRowsAboutToBeRemoved(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceRowsRemoved(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceColumnsAboutToBeInserted(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(columnsInserted(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceColumnsInserted(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceColumnsAboutToBeRemoved(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(columnsRemoved(QModelIndex,int,int)),+
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               this, SLOT(_q_sourceColumnsRemoved(QModelIndex,int,int)));+
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    disconnect(model, SIGNAL(modelReset()), this, SIGNAL(modelReset())); // signal to signal+
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    disconnect(model, SIGNAL(layoutAboutToBeChanged()), this, SIGNAL(layoutAboutToBeChanged())); // signal to signal+
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    disconnect(model, SIGNAL(layoutChanged()), this, SIGNAL(layoutChanged())); // signal to signal+
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}+
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+
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/*!+
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  \fn QObject *QProxyModel::parent() const+
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  \internal+
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*/+
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+
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void QProxyModelPrivate::_q_sourceDataChanged(const QModelIndex &tl,const QModelIndex &br)+
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{+
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    Q_Q(QProxyModel);+
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    emit q->dataChanged(q->setProxyModel(tl), q->setProxyModel(br));+
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}+
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+
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void QProxyModelPrivate::_q_sourceRowsAboutToBeInserted(const QModelIndex &parent, int first ,int last)+
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{+
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    Q_Q(QProxyModel);+
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    q->beginInsertRows(q->setProxyModel(parent), first, last);+
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}+
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+
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void QProxyModelPrivate::_q_sourceRowsInserted(const QModelIndex &, int, int)+
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{+
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    Q_Q(QProxyModel);+
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    q->endInsertRows();+
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}+
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+
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void QProxyModelPrivate::_q_sourceRowsAboutToBeRemoved(const QModelIndex &parent, int first, int last)+
−
{+
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    Q_Q(QProxyModel);+
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    q->beginRemoveRows(q->setProxyModel(parent), first, last);+
−
}+
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+
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void QProxyModelPrivate::_q_sourceRowsRemoved(const QModelIndex &, int, int)+
−
{+
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    Q_Q(QProxyModel);+
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    q->endRemoveRows();+
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}+
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+
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void QProxyModelPrivate::_q_sourceColumnsAboutToBeInserted(const QModelIndex &parent, int first, int last)+
−
{+
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    Q_Q(QProxyModel);+
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    q->beginInsertColumns(q->setProxyModel(parent), first, last);+
−
}+
−
+
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void QProxyModelPrivate::_q_sourceColumnsInserted(const QModelIndex &, int, int)+
−
{+
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    Q_Q(QProxyModel);+
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    q->endInsertColumns();+
−
}+
−
+
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void QProxyModelPrivate::_q_sourceColumnsAboutToBeRemoved(const QModelIndex &parent, int first, int last)+
−
{+
−
    Q_Q(QProxyModel);+
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    q->beginRemoveColumns(q->setProxyModel(parent), first, last);+
−
}+
−
+
−
+
−
void QProxyModelPrivate::_q_sourceColumnsRemoved(const QModelIndex &, int, int)+
−
{+
−
    Q_Q(QProxyModel);+
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    q->endRemoveColumns();+
−
}+
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+
−
QT_END_NAMESPACE+
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+
−
#include "moc_qproxymodel.cpp"+
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+
−
#endif // QT_NO_PROXYMODEL+
−