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#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();

}