--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/itemviews/qproxymodel.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,547 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 "qproxymodel.h"
+
+#ifndef QT_NO_PROXYMODEL
+#include <private/qproxymodel_p.h>
+#include <qsize.h>
+#include <qstringlist.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \class QProxyModel
+ \obsolete
+ \brief The QProxyModel class provides support for processing data
+ passed between another model and a view.
+
+ \ingroup model-view
+
+ If you want to do filtering and sorting, see QSortFilterProxyModel.
+
+ Proxy models provide a standard model interface that can be used to
+ manipulate the data retrieved through an underlying model. They can be used to
+ perform operations such as sorting and filtering on the data obtained without
+ changing the contents of the model.
+
+ Just as with subclasses of QAbstractItemView, QProxyModel provides the setModel()
+ function that is used to specify the model to be acted on by the proxy.
+ Views can be connected to either the underlying model or the proxy model with
+ \l QAbstractItemView::setModel().
+
+ Since views rely on the information provided in model indexes to identify
+ items of data from models, and to position these items in some visual
+ representation, proxy models must create their own model indexes instead of
+ supplying model indexes from their underlying models.
+
+ \sa \link model-view-programming.html Model/View Programming\endlink QAbstractItemModel
+
+*/
+
+/*!
+ Constructs a proxy model with the given \a parent.
+*/
+
+QProxyModel::QProxyModel(QObject *parent)
+ : QAbstractItemModel(*new QProxyModelPrivate, parent)
+{
+ Q_D(QProxyModel);
+ setModel(&d->empty);
+}
+
+/*!
+ \internal
+*/
+QProxyModel::QProxyModel(QProxyModelPrivate &dd, QObject *parent)
+ : QAbstractItemModel(dd, parent)
+{
+ Q_D(QProxyModel);
+ setModel(&d->empty);
+}
+
+/*!
+ Destroys the proxy model.
+*/
+QProxyModel::~QProxyModel()
+{
+}
+
+/*!
+ Sets the given \a model to be processed by the proxy model.
+*/
+void QProxyModel::setModel(QAbstractItemModel *model)
+{
+ Q_D(QProxyModel);
+ if (d->model && d->model != &d->empty)
+ disconnectFromModel(d->model);
+ if (model) {
+ d->model = model;
+ connectToModel(model);
+ } else {
+ d->model = &d->empty;
+ }
+}
+
+/*!
+ Returns the model that contains the data that is available through the
+ proxy model.
+*/
+QAbstractItemModel *QProxyModel::model() const
+{
+ Q_D(const QProxyModel);
+ return d->model;
+}
+
+/*!
+ Returns the model index with the given \a row, \a column, and \a parent.
+
+ \sa QAbstractItemModel::index()
+*/
+QModelIndex QProxyModel::index(int row, int column, const QModelIndex &parent) const
+{
+ Q_D(const QProxyModel);
+ return setProxyModel(d->model->index(row, column, setSourceModel(parent)));
+}
+
+/*!
+ Returns the model index that corresponds to the parent of the given \a child
+ index.
+*/
+QModelIndex QProxyModel::parent(const QModelIndex &child) const
+{
+ Q_D(const QProxyModel);
+ return setProxyModel(d->model->parent(setSourceModel(child)));
+}
+
+/*!
+ Returns the number of rows for the given \a parent.
+
+ \sa QAbstractItemModel::rowCount()
+*/
+int QProxyModel::rowCount(const QModelIndex &parent) const
+{
+ Q_D(const QProxyModel);
+ return d->model->rowCount(setSourceModel(parent));
+}
+
+/*!
+ Returns the number of columns for the given \a parent.
+
+ \sa QAbstractItemModel::columnCount()
+*/
+int QProxyModel::columnCount(const QModelIndex &parent) const
+{
+ Q_D(const QProxyModel);
+ return d->model->columnCount(setSourceModel(parent));
+}
+
+/*!
+ Returns true if the item corresponding to the \a parent index has child
+ items; otherwise returns false.
+
+ \sa QAbstractItemModel::hasChildren()
+*/
+bool QProxyModel::hasChildren(const QModelIndex &parent) const
+{
+ Q_D(const QProxyModel);
+ return d->model->hasChildren(setSourceModel(parent));
+}
+
+/*!
+ Returns the data stored in the item with the given \a index under the
+ specified \a role.
+*/
+QVariant QProxyModel::data(const QModelIndex &index, int role) const
+{
+ Q_D(const QProxyModel);
+ return d->model->data(setSourceModel(index), role);
+}
+
+/*!
+ Sets the \a role data for the item at \a index to \a value.
+ Returns true if successful; otherwise returns false.
+
+ The base class implementation returns false. This function and
+ data() must be reimplemented for editable models.
+
+ \sa data() itemData() QAbstractItemModel::setData()
+*/
+bool QProxyModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+ Q_D(const QProxyModel);
+ return d->model->setData(setSourceModel(index), value, role);
+}
+
+/*!
+ Returns the data stored in the \a section of the header with specified
+ \a orientation under the given \a role.
+*/
+QVariant QProxyModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+ Q_D(const QProxyModel);
+ return d->model->headerData(section, orientation, role);
+}
+
+/*!
+ Sets the \a role data in the \a section of the header with the specified
+ \a orientation to the \a value given.
+
+ \sa QAbstractItemModel::setHeaderData()
+*/
+bool QProxyModel::setHeaderData(int section, Qt::Orientation orientation,
+ const QVariant &value, int role)
+{
+ Q_D(const QProxyModel);
+ return d->model->setHeaderData(section, orientation, value, role);
+}
+
+/*!
+ Returns a list of MIME types that are supported by the model.
+*/
+QStringList QProxyModel::mimeTypes() const
+{
+ Q_D(const QProxyModel);
+ return d->model->mimeTypes();
+}
+
+/*!
+ Returns MIME data for the specified \a indexes in the model.
+*/
+QMimeData *QProxyModel::mimeData(const QModelIndexList &indexes) const
+{
+ Q_D(const QProxyModel);
+ QModelIndexList lst;
+ for (int i = 0; i < indexes.count(); ++i)
+ lst.append(setSourceModel(indexes.at(i)));
+ return d->model->mimeData(lst);
+}
+
+/*!
+ Returns true if the model accepts the \a data dropped onto an attached
+ view for the specified \a action; otherwise returns false.
+
+ The \a parent, \a row, and \a column details can be used to control
+ which MIME types are acceptable to different parts of a model when
+ received via the drag and drop system.
+*/
+bool QProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action,
+ int row, int column, const QModelIndex &parent)
+{
+ Q_D(const QProxyModel);
+ return d->model->dropMimeData(data, action, row, column, setSourceModel(parent));
+}
+
+/*!
+ Returns the drop actions that are supported by the model; this is
+ a combination of the individual actions defined in \l Qt::DropActions.
+
+ The selection of drop actions provided by the model will influence the
+ behavior of the component that started the drag and drop operation.
+
+ \sa \link dnd.html Drag and Drop\endlink
+*/
+Qt::DropActions QProxyModel::supportedDropActions() const
+{
+ Q_D(const QProxyModel);
+ return d->model->supportedDropActions();
+}
+
+/*!
+ Inserts \a count rows into the model, creating new items as children of
+ the given \a parent. The new rows are inserted before the \a row
+ specified. If the \a parent item has no children, a single column is
+ created to contain the required number of rows.
+
+ Returns true if the rows were successfully inserted; otherwise
+ returns false.
+
+ \sa QAbstractItemModel::insertRows()*/
+bool QProxyModel::insertRows(int row, int count, const QModelIndex &parent)
+{
+ Q_D(const QProxyModel);
+ return d->model->insertRows(row, count, setSourceModel(parent));
+}
+
+/*!
+ Inserts \a count columns into the model, creating new items as children of
+ the given \a parent. The new columns are inserted before the \a column
+ specified. If the \a parent item has no children, a single row is created
+ to contain the required number of columns.
+
+ Returns true if the columns were successfully inserted; otherwise
+ returns false.
+
+ \sa QAbstractItemModel::insertColumns()
+*/
+bool QProxyModel::insertColumns(int column, int count, const QModelIndex &parent)
+{
+ Q_D(const QProxyModel);
+ return d->model->insertColumns(column, count, setSourceModel(parent));
+}
+
+/*!
+ Fetches more child items of the given \a parent. This function is used by views
+ to tell the model that they can display more data than the model has provided.
+
+ \sa QAbstractItemModel::fetchMore()
+*/
+void QProxyModel::fetchMore(const QModelIndex &parent)
+{
+ Q_D(const QProxyModel);
+ d->model->fetchMore(parent);
+}
+
+/*!
+ Returns the item flags for the given \a index.
+*/
+Qt::ItemFlags QProxyModel::flags(const QModelIndex &index) const
+{
+ Q_D(const QProxyModel);
+ return d->model->flags(setSourceModel(index));
+}
+
+/*!
+ Sorts the child items in the specified \a column according to the sort
+ order defined by \a order.
+
+ \sa QAbstractItemModel::sort()
+*/
+void QProxyModel::sort(int column, Qt::SortOrder order)
+{
+ Q_D(QProxyModel);
+ d->model->sort(column, order);
+}
+
+/*!
+ Returns a list of model indexes that each contain the given \a value for
+ the \a role specified. The search begins at the \a start index and is
+ performed according to the specified \a flags. The search continues until
+ the number of matching data items equals \a hits, the last row is reached,
+ or the search reaches \a start again, depending on whether \c MatchWrap is
+ specified in \a flags.
+
+ \sa QAbstractItemModel::match()
+*/
+QModelIndexList QProxyModel::match(const QModelIndex &start,
+ int role, const QVariant &value,
+ int hits, Qt::MatchFlags flags) const
+{
+ Q_D(const QProxyModel);
+ return d->model->match(start, role, value, hits, flags);
+}
+
+/*!
+ Returns the size of the item that corresponds to the specified \a index.
+*/
+QSize QProxyModel::span(const QModelIndex &index) const
+{
+ Q_D(const QProxyModel);
+ return d->model->span(setSourceModel(index));
+}
+
+/*!
+ */
+bool QProxyModel::submit()
+{
+ Q_D(QProxyModel);
+ return d->model->submit();
+}
+
+/*!
+ */
+void QProxyModel::revert()
+{
+ Q_D(QProxyModel);
+ d->model->revert();
+}
+
+/*!
+ \internal
+ Change the model pointer in the given \a source_index to point to the proxy model.
+ */
+QModelIndex QProxyModel::setProxyModel(const QModelIndex &source_index) const
+{
+ QModelIndex proxy_index = source_index;
+ if (proxy_index.isValid())
+ proxy_index.m = this;
+ return proxy_index;
+}
+
+/*!
+ \internal
+ Change the model pointer in the given \a proxy_index to point to the source model.
+ */
+QModelIndex QProxyModel::setSourceModel(const QModelIndex &proxy_index) const
+{
+ Q_D(const QProxyModel);
+ QModelIndex source_index = proxy_index;
+ source_index.m = d->model;
+ return source_index;
+}
+
+/*!
+ \internal
+ Connect to all the signals emitted by given \a model.
+*/
+void QProxyModel::connectToModel(const QAbstractItemModel *model) const
+{
+ connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_sourceDataChanged(QModelIndex,QModelIndex)));
+ connect(model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),
+ this, SIGNAL(headerDataChanged(Qt::Orientation,int,int))); // signal to signal
+ connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsAboutToBeInserted(QModelIndex,int,int)));
+ connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsInserted(QModelIndex,int,int)));
+ connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsAboutToBeRemoved(QModelIndex,int,int)));
+ connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsRemoved(QModelIndex,int,int)));
+ connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsAboutToBeInserted(QModelIndex,int,int)));
+ connect(model, SIGNAL(columnsInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsInserted(QModelIndex,int,int)));
+ connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsAboutToBeRemoved(QModelIndex,int,int)));
+ connect(model, SIGNAL(columnsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsRemoved(QModelIndex,int,int)));
+ connect(model, SIGNAL(modelReset()), this, SIGNAL(modelReset())); // signal to signal
+ connect(model, SIGNAL(layoutAboutToBeChanged()), this, SIGNAL(layoutAboutToBeChanged())); // signal to signal
+ connect(model, SIGNAL(layoutChanged()), this, SIGNAL(layoutChanged())); // signal to signal
+}
+
+/*!
+ \internal
+ Disconnect from all the signals emitted by the given \a model.
+ */
+void QProxyModel::disconnectFromModel(const QAbstractItemModel *model) const
+{
+ disconnect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_sourceDataChanged(QModelIndex,QModelIndex)));
+ disconnect(model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),
+ this, SIGNAL(headerDataChanged(Qt::Orientation,int,int))); // signal to signal
+ disconnect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsAboutToBeInserted(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
+ this, SLOT(rowsInserted(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsAboutToBeRemoved(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceRowsRemoved(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsAboutToBeInserted(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(columnsInserted(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsInserted(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsAboutToBeRemoved(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(columnsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_sourceColumnsRemoved(QModelIndex,int,int)));
+ disconnect(model, SIGNAL(modelReset()), this, SIGNAL(modelReset())); // signal to signal
+ disconnect(model, SIGNAL(layoutAboutToBeChanged()), this, SIGNAL(layoutAboutToBeChanged())); // signal to signal
+ disconnect(model, SIGNAL(layoutChanged()), this, SIGNAL(layoutChanged())); // signal to signal
+}
+
+/*!
+ \fn QObject *QProxyModel::parent() const
+ \internal
+*/
+
+void QProxyModelPrivate::_q_sourceDataChanged(const QModelIndex &tl,const QModelIndex &br)
+{
+ Q_Q(QProxyModel);
+ emit q->dataChanged(q->setProxyModel(tl), q->setProxyModel(br));
+}
+
+void QProxyModelPrivate::_q_sourceRowsAboutToBeInserted(const QModelIndex &parent, int first ,int last)
+{
+ Q_Q(QProxyModel);
+ q->beginInsertRows(q->setProxyModel(parent), first, last);
+}
+
+void QProxyModelPrivate::_q_sourceRowsInserted(const QModelIndex &, int, int)
+{
+ Q_Q(QProxyModel);
+ q->endInsertRows();
+}
+
+void QProxyModelPrivate::_q_sourceRowsAboutToBeRemoved(const QModelIndex &parent, int first, int last)
+{
+ Q_Q(QProxyModel);
+ q->beginRemoveRows(q->setProxyModel(parent), first, last);
+}
+
+void QProxyModelPrivate::_q_sourceRowsRemoved(const QModelIndex &, int, int)
+{
+ Q_Q(QProxyModel);
+ q->endRemoveRows();
+}
+
+void QProxyModelPrivate::_q_sourceColumnsAboutToBeInserted(const QModelIndex &parent, int first, int last)
+{
+ Q_Q(QProxyModel);
+ q->beginInsertColumns(q->setProxyModel(parent), first, last);
+}
+
+void QProxyModelPrivate::_q_sourceColumnsInserted(const QModelIndex &, int, int)
+{
+ Q_Q(QProxyModel);
+ q->endInsertColumns();
+}
+
+void QProxyModelPrivate::_q_sourceColumnsAboutToBeRemoved(const QModelIndex &parent, int first, int last)
+{
+ Q_Q(QProxyModel);
+ q->beginRemoveColumns(q->setProxyModel(parent), first, last);
+}
+
+
+void QProxyModelPrivate::_q_sourceColumnsRemoved(const QModelIndex &, int, int)
+{
+ Q_Q(QProxyModel);
+ q->endRemoveColumns();
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qproxymodel.cpp"
+
+#endif // QT_NO_PROXYMODEL