summaryrefslogtreecommitdiffstats
path: root/src/gui/itemviews/qabstractproxymodel.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/gui/itemviews/qabstractproxymodel.cpp')
-rw-r--r--src/gui/itemviews/qabstractproxymodel.cpp409
1 files changed, 409 insertions, 0 deletions
diff --git a/src/gui/itemviews/qabstractproxymodel.cpp b/src/gui/itemviews/qabstractproxymodel.cpp
new file mode 100644
index 0000000000..34ca7dff50
--- /dev/null
+++ b/src/gui/itemviews/qabstractproxymodel.cpp
@@ -0,0 +1,409 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qabstractproxymodel.h"
+
+#ifndef QT_NO_PROXYMODEL
+
+#include "qitemselectionmodel.h"
+#include <private/qabstractproxymodel_p.h>
+#include <QtCore/QSize>
+#include <QtCore/QStringList>
+
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \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.
+
+ To subclass QAbstractProxyModel, you need to implement mapFromSource() and
+ mapToSource(). The mapSelectionFromSource() and mapSelectionToSource()
+ functions only need to be reimplemented if you need a behavior different
+ from the default behavior.
+
+ \note If the source model is deleted or no source model is specified, the
+ proxy model operates on a empty placeholder model.
+
+ \sa QSortFilterProxyModel, QAbstractItemModel, {Model/View Programming}
+*/
+
+//detects the deletion of the source model
+void QAbstractProxyModelPrivate::_q_sourceModelDestroyed()
+{
+ model = QAbstractItemModelPrivate::staticEmptyModel();
+}
+
+/*!
+ Constructs a proxy model with the given \a parent.
+*/
+
+QAbstractProxyModel::QAbstractProxyModel(QObject *parent)
+ :QAbstractItemModel(*new QAbstractProxyModelPrivate, parent)
+{
+ setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
+}
+
+/*!
+ \internal
+*/
+
+QAbstractProxyModel::QAbstractProxyModel(QAbstractProxyModelPrivate &dd, QObject *parent)
+ : QAbstractItemModel(dd, parent)
+{
+ setSourceModel(QAbstractItemModelPrivate::staticEmptyModel());
+}
+
+/*!
+ Destroys the proxy model.
+*/
+QAbstractProxyModel::~QAbstractProxyModel()
+{
+
+}
+
+/*!
+ Sets the given \a sourceModel to be processed by the proxy model.
+*/
+void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
+{
+ Q_D(QAbstractProxyModel);
+ if (d->model) {
+ disconnect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));
+ disconnect(d->model, SIGNAL(modelReset()), this, SLOT(resetInternalData()));
+ }
+
+ if (sourceModel) {
+ d->model = sourceModel;
+ connect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));
+ connect(d->model, SIGNAL(modelReset()), this, SLOT(resetInternalData()));
+ } else {
+ d->model = QAbstractItemModelPrivate::staticEmptyModel();
+ }
+ d->roleNames = d->model->roleNames();
+}
+
+/*!
+ Returns the model that contains the data that is available through the proxy model.
+*/
+QAbstractItemModel *QAbstractProxyModel::sourceModel() const
+{
+ Q_D(const QAbstractProxyModel);
+ if (d->model == QAbstractItemModelPrivate::staticEmptyModel())
+ return 0;
+ return d->model;
+}
+
+/*!
+ \reimp
+ */
+bool QAbstractProxyModel::submit()
+{
+ Q_D(QAbstractProxyModel);
+ return d->model->submit();
+}
+
+/*!
+ \reimp
+ */
+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.
+ */
+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;
+}
+
+/*!
+ Returns a proxy selection mapped from the specified \a sourceSelection.
+
+ Reimplement this method to map source selections to proxy selections.
+*/
+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;
+}
+
+/*!
+ \reimp
+ */
+QVariant QAbstractProxyModel::data(const QModelIndex &proxyIndex, int role) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->data(mapToSource(proxyIndex), role);
+}
+
+/*!
+ \reimp
+ */
+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);
+}
+
+/*!
+ \reimp
+ */
+QMap<int, QVariant> QAbstractProxyModel::itemData(const QModelIndex &proxyIndex) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->itemData(mapToSource(proxyIndex));
+}
+
+/*!
+ \reimp
+ */
+Qt::ItemFlags QAbstractProxyModel::flags(const QModelIndex &index) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->flags(mapToSource(index));
+}
+
+/*!
+ \reimp
+ */
+bool QAbstractProxyModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+ Q_D(QAbstractProxyModel);
+ return d->model->setData(mapToSource(index), value, role);
+}
+
+/*!
+ \reimp
+ */
+bool QAbstractProxyModel::setItemData(const QModelIndex &index, const QMap< int, QVariant >& roles)
+{
+ Q_D(QAbstractProxyModel);
+ return d->model->setItemData(mapToSource(index), roles);
+}
+
+/*!
+ \reimp
+ */
+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);
+}
+
+/*!
+ \reimp
+ */
+QModelIndex QAbstractProxyModel::buddy(const QModelIndex &index) const
+{
+ Q_D(const QAbstractProxyModel);
+ return mapFromSource(d->model->buddy(mapToSource(index)));
+}
+
+/*!
+ \reimp
+ */
+bool QAbstractProxyModel::canFetchMore(const QModelIndex &parent) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->canFetchMore(mapToSource(parent));
+}
+
+/*!
+ \reimp
+ */
+void QAbstractProxyModel::fetchMore(const QModelIndex &parent)
+{
+ Q_D(QAbstractProxyModel);
+ d->model->fetchMore(mapToSource(parent));
+}
+
+/*!
+ \reimp
+ */
+void QAbstractProxyModel::sort(int column, Qt::SortOrder order)
+{
+ Q_D(QAbstractProxyModel);
+ d->model->sort(column, order);
+}
+
+/*!
+ \reimp
+ */
+QSize QAbstractProxyModel::span(const QModelIndex &index) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->span(mapToSource(index));
+}
+
+/*!
+ \reimp
+ */
+bool QAbstractProxyModel::hasChildren(const QModelIndex &parent) const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->hasChildren(mapToSource(parent));
+}
+
+/*!
+ \reimp
+ */
+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);
+}
+
+/*!
+ \reimp
+ */
+QStringList QAbstractProxyModel::mimeTypes() const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->mimeTypes();
+}
+
+/*!
+ \reimp
+ */
+Qt::DropActions QAbstractProxyModel::supportedDropActions() const
+{
+ Q_D(const QAbstractProxyModel);
+ return d->model->supportedDropActions();
+}
+
+/*
+ \since 4.8
+
+ This slot is called just after the internal data of a model is cleared
+ while it is being reset.
+
+ This slot is provided the convenience of subclasses of concrete proxy
+ models, such as subclasses of QSortFilterProxyModel which maintain extra
+ data.
+
+ \snippet doc/src/snippets/code/src_corelib_kernel_qabstractitemmodel.cpp 10
+
+ \sa modelAboutToBeReset(), modelReset()
+*/
+void QAbstractProxyModel::resetInternalData()
+{
+
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qabstractproxymodel.cpp"
+
+#endif // QT_NO_PROXYMODEL