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/*
This file is part of KDE.
Copyright (c) 2010 Stephen Kelly <steveire@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA.
*/
#include "kcheckableproxymodel.h"
#include <QItemSelectionModel>
class KCheckableProxyModelPrivate
{
Q_DECLARE_PUBLIC(KCheckableProxyModel)
KCheckableProxyModel *q_ptr;
KCheckableProxyModelPrivate(KCheckableProxyModel *checkableModel)
: q_ptr(checkableModel),
m_itemSelectionModel(0)
{
}
QItemSelectionModel *m_itemSelectionModel;
void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
};
KCheckableProxyModel::KCheckableProxyModel(QObject* parent)
: KIdentityProxyModel(parent), d_ptr(new KCheckableProxyModelPrivate(this))
{
}
KCheckableProxyModel::~KCheckableProxyModel()
{
delete d_ptr;
}
void KCheckableProxyModel::setSelectionModel(QItemSelectionModel* itemSelectionModel)
{
Q_D(KCheckableProxyModel);
d->m_itemSelectionModel = itemSelectionModel;
Q_ASSERT(sourceModel() ? d->m_itemSelectionModel->model() == sourceModel() : true);
connect(itemSelectionModel, SIGNAL(selectionChanged(QItemSelection,QItemSelection)), SLOT(selectionChanged(QItemSelection,QItemSelection)));
}
QItemSelectionModel *KCheckableProxyModel::selectionModel() const
{
Q_D(const KCheckableProxyModel);
return d->m_itemSelectionModel;
}
Qt::ItemFlags KCheckableProxyModel::flags(const QModelIndex& index) const
{
if (!index.isValid() || index.column() != 0)
return KIdentityProxyModel::flags(index);
return KIdentityProxyModel::flags(index) | Qt::ItemIsUserCheckable;
}
QVariant KCheckableProxyModel::data(const QModelIndex& index, int role) const
{
Q_D(const KCheckableProxyModel);
if (role == Qt::CheckStateRole)
{
if (index.column() != 0)
return QVariant();
if (!d->m_itemSelectionModel)
return Qt::Unchecked;
return d->m_itemSelectionModel->selection().contains(mapToSource(index)) ? Qt::Checked : Qt::Unchecked;
}
return KIdentityProxyModel::data(index, role);
}
bool KCheckableProxyModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
Q_D(KCheckableProxyModel);
if (role == Qt::CheckStateRole)
{
if (index.column() != 0)
return false;
if (!d->m_itemSelectionModel)
return false;
Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
const QModelIndex srcIndex = mapToSource(index);
bool result = select(QItemSelection(srcIndex, srcIndex), state == Qt::Checked ? QItemSelectionModel::Select : QItemSelectionModel::Deselect);
emit dataChanged(index, index);
return result;
}
return KIdentityProxyModel::setData(index, value, role);
}
void KCheckableProxyModel::setSourceModel(QAbstractItemModel* sourceModel)
{
KIdentityProxyModel::setSourceModel(sourceModel);
Q_ASSERT(d_ptr->m_itemSelectionModel ? d_ptr->m_itemSelectionModel->model() == sourceModel : true);
}
void KCheckableProxyModelPrivate::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
{
Q_Q(KCheckableProxyModel);
foreach (const QItemSelectionRange &range, q->mapSelectionFromSource(selected))
q->dataChanged(range.topLeft(), range.bottomRight());
foreach (const QItemSelectionRange &range, q->mapSelectionFromSource(deselected))
q->dataChanged(range.topLeft(), range.bottomRight());
}
bool KCheckableProxyModel::select(const QItemSelection& selection, QItemSelectionModel::SelectionFlags command)
{
Q_D(KCheckableProxyModel);
d->m_itemSelectionModel->select(selection, command);
return true;
}
#include "kcheckableproxymodel.moc"
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