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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QABSTRACTITEMMODEL_P_H
#define QABSTRACTITEMMODEL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of QAbstractItemModel*. This header file may change from version
// to version without notice, or even be removed.
//
// We mean it.
//
//
#include "private/qobject_p.h"
#include "QtCore/qstack.h"
#include "QtCore/qset.h"
#include "QtCore/qhash.h"
QT_BEGIN_NAMESPACE
class QPersistentModelIndexData
{
public:
QPersistentModelIndexData() : model(0) {}
QPersistentModelIndexData(const QModelIndex &idx) : index(idx), model(idx.model()) {}
QModelIndex index;
QAtomicInt ref;
const QAbstractItemModel *model;
static QPersistentModelIndexData *create(const QModelIndex &index);
static void destroy(QPersistentModelIndexData *data);
};
class Q_CORE_EXPORT QAbstractItemModelPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QAbstractItemModel)
public:
QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {}
~QAbstractItemModelPrivate();
void removePersistentIndexData(QPersistentModelIndexData *data);
void movePersistentIndexes(const QVector<QPersistentModelIndexData *> &indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last);
void rowsInserted(const QModelIndex &parent, int first, int last);
void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
void rowsRemoved(const QModelIndex &parent, int first, int last);
void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last);
void columnsInserted(const QModelIndex &parent, int first, int last);
void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
void columnsRemoved(const QModelIndex &parent, int first, int last);
static QAbstractItemModel *staticEmptyModel();
static bool variantLessThan(const QVariant &v1, const QVariant &v2);
void itemsAboutToBeMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation);
void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
inline QModelIndex createIndex(int row, int column, void *data = 0) const {
return q_func()->createIndex(row, column, data);
}
inline QModelIndex createIndex(int row, int column, int id) const {
return q_func()->createIndex(row, column, id);
}
inline bool indexValid(const QModelIndex &index) const {
return (index.row() >= 0) && (index.column() >= 0) && (index.model() == q_func());
}
inline void invalidatePersistentIndexes() {
foreach (QPersistentModelIndexData *data, persistent.indexes) {
data->index = QModelIndex();
data->model = 0;
}
persistent.indexes.clear();
}
/*!
\internal
clean the QPersistentModelIndex relative to the index if there is one.
To be used before an index is invalided
*/
inline void invalidatePersistentIndex(const QModelIndex &index) {
QHash<QModelIndex, QPersistentModelIndexData *>::iterator it = persistent.indexes.find(index);
if(it != persistent.indexes.end()) {
QPersistentModelIndexData *data = *it;
persistent.indexes.erase(it);
data->index = QModelIndex();
data->model = 0;
}
}
struct Change {
Change() : first(-1), last(-1) {}
Change(const Change &c) : parent(c.parent), first(c.first), last(c.last), needsAdjust(c.needsAdjust) {}
Change(const QModelIndex &p, int f, int l) : parent(p), first(f), last(l), needsAdjust(false) {}
QModelIndex parent;
int first, last;
// In cases such as this:
// - A
// - B
// - C
// - - D
// - - E
// - - F
//
// If B is moved to above E, C is the source parent in the signal and its row is 2. When the move is
// completed however, C is at row 1 and there is no row 2 at the same level in the model at all.
// The QModelIndex is adjusted to correct that in those cases before reporting it though the
// rowsMoved signal.
bool needsAdjust;
bool isValid() { return first >= 0 && last >= 0; }
};
QStack<Change> changes;
struct Persistent {
Persistent() {}
QHash<QModelIndex, QPersistentModelIndexData *> indexes;
QStack<QVector<QPersistentModelIndexData *> > moved;
QStack<QVector<QPersistentModelIndexData *> > invalidated;
void insertMultiAtEnd(const QModelIndex& key, QPersistentModelIndexData *data);
} persistent;
Qt::DropActions supportedDragActions;
QHash<int,QByteArray> roleNames;
static const QHash<int,QByteArray> &defaultRoleNames();
};
QT_END_NAMESPACE
#endif // QABSTRACTITEMMODEL_P_H
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