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qabstractproxymodel.cpp

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** This file is part of the QtGui module of the Qt Toolkit.
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#include "qabstractproxymodel.h"

#ifndef QT_NO_PROXYMODEL

#include "qitemselectionmodel.h"
#include <private/qabstractproxymodel_p.h>

/*!
    \since 4.1
    \class QAbstractProxyModel
    \brief The QAbstractProxyModel class provides a base class for proxy item models
    that can do sorting, filtering or other data processing tasks.
    \ingroup model-view

    This class defines the standard interface that proxy models must use to be able to
    interoperate correctly with other model/view components. It is not supposed to be
    instantiated directly.

    All standard proxy models are derived from the QAbstractProxyModel class. If you
    need to create a new proxy model class, it is usually better to subclass an existing
    class that provides the closest behavior to the one you want to provide. Proxy models
    that filter or sort items of data from a source model should be created by using or
    subclassing QSortFilterProxyModel.

    \sa QSortFilterProxyModel, QAbstractItemModel, {Model/View Programming}
*/


/*!
    Constructs a proxy model with the given \a parent.
*/

00056 QAbstractProxyModel::QAbstractProxyModel(QObject *parent)
    :QAbstractItemModel(*new QAbstractProxyModelPrivate, parent)
{
    setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
}

/*!
    \internal
*/

00066 QAbstractProxyModel::QAbstractProxyModel(QAbstractProxyModelPrivate &dd, QObject *parent)
    : QAbstractItemModel(dd, parent)
{
    setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
}

/*!
    Destroys the proxy model.
*/
00075 QAbstractProxyModel::~QAbstractProxyModel()
{

}

/*!
    Sets the given \a sourceModel to be processed by the proxy model.
*/
00083 void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
{
    Q_D(QAbstractProxyModel);
    if (sourceModel)
        d->model = sourceModel;
    else
        d->model = QAbstractItemModelPrivate::staticEmptyModel();
}

/*!
    Returns the model that contains the data that is available through the proxy model.
*/
00095 QAbstractItemModel *QAbstractProxyModel::sourceModel() const
{
    Q_D(const QAbstractProxyModel);
    return d->model;
}

/*!
    \reimp
 */
00104 bool QAbstractProxyModel::submit()
{
    Q_D(QAbstractProxyModel);
    return d->model->submit();
}

/*!
    \reimp
 */
00113 void QAbstractProxyModel::revert()
{
    Q_D(QAbstractProxyModel);
    d->model->revert();
}


/*!
  \fn QModelIndex QAbstractProxyModel::mapToSource(const QModelIndex &proxyIndex) const

  Reimplement this function to return the model index in the source model that
  corresponds to the \a proxyIndex in the proxy model.

  \sa mapFromSource()
*/

/*!
  \fn QModelIndex QAbstractProxyModel::mapFromSource(const QModelIndex &sourceIndex) const

  Reimplement this function to return the model index in the proxy model that
  corresponds to the \a sourceIndex from the source model.

  \sa mapToSource()
*/

/*!
  Returns a source selection mapped from the specified \a proxySelection.

  Reimplement this method to map proxy selections to source selections.
 */
00143 QItemSelection QAbstractProxyModel::mapSelectionToSource(const QItemSelection &proxySelection) const
{
    QModelIndexList proxyIndexes = proxySelection.indexes();
    QItemSelection sourceSelection;
    for (int i = 0; i < proxyIndexes.size(); ++i)
        sourceSelection << QItemSelectionRange(mapToSource(proxyIndexes.at(i)));
    return sourceSelection;
}

/*!
  Returns a proxy selection mapped from the specified \a sourceSelection.

  Reimplement this method to map source selections to proxy selections.
*/
00157 QItemSelection QAbstractProxyModel::mapSelectionFromSource(const QItemSelection &sourceSelection) const
{
    QModelIndexList sourceIndexes = sourceSelection.indexes();
    QItemSelection proxySelection;
    for (int i = 0; i < sourceIndexes.size(); ++i)
        proxySelection << QItemSelectionRange(mapFromSource(sourceIndexes.at(i)));
    return proxySelection;
}

/*!
    \reimp
 */
00169 QVariant QAbstractProxyModel::data(const QModelIndex &proxyIndex, int role) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->data(mapToSource(proxyIndex), role);
}

/*!
    \reimp
 */
00178 QVariant QAbstractProxyModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->headerData(section, orientation, role);
}

/*!
    \reimp
 */
00187 Qt::ItemFlags QAbstractProxyModel::flags(const QModelIndex &index) const
{
    Q_D(const QAbstractProxyModel);
    return d->model->flags(mapToSource(index));
}

#endif // QT_NO_PROXYMODEL

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