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/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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** This file is part of the QtCore module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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****************************************************************************/
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#ifndef QABSTRACTITEMMODEL_P_H
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#define QABSTRACTITEMMODEL_P_H
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// This file is not part of the Qt API. It exists for the convenience
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// of QAbstractItemModel*. This header file may change from version
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// to version without notice, or even be removed.
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#include "private/qobject_p.h"
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#include "QtCore/qstack.h"
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#include "QtCore/qset.h"
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#include "QtCore/qhash.h"
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class QPersistentModelIndexData
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QPersistentModelIndexData() : model(0) {}
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QPersistentModelIndexData(const QModelIndex &idx) : index(idx), model(idx.model()) {}
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const QAbstractItemModel *model;
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static QPersistentModelIndexData *create(const QModelIndex &index);
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static void destroy(QPersistentModelIndexData *data);
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class Q_CORE_EXPORT QAbstractItemModelPrivate : public QObjectPrivate
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Q_DECLARE_PUBLIC(QAbstractItemModel)
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QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {}
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void removePersistentIndexData(QPersistentModelIndexData *data);
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void movePersistentIndexes(QVector<QPersistentModelIndexData *> indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
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void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last);
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void rowsInserted(const QModelIndex &parent, int first, int last);
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void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
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void rowsRemoved(const QModelIndex &parent, int first, int last);
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void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last);
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void columnsInserted(const QModelIndex &parent, int first, int last);
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void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
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void columnsRemoved(const QModelIndex &parent, int first, int last);
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static QAbstractItemModel *staticEmptyModel();
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static bool variantLessThan(const QVariant &v1, const QVariant &v2);
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void itemsAboutToBeMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation);
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void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
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bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
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inline QModelIndex createIndex(int row, int column, void *data = 0) const {
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return q_func()->createIndex(row, column, data);
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inline QModelIndex createIndex(int row, int column, int id) const {
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return q_func()->createIndex(row, column, id);
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inline bool indexValid(const QModelIndex &index) const {
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return (index.row() >= 0) && (index.column() >= 0) && (index.model() == q_func());
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inline void invalidatePersistentIndexes() {
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foreach (QPersistentModelIndexData *data, persistent.indexes) {
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data->index = QModelIndex();
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persistent.indexes.clear();
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clean the QPersistentModelIndex relative to the index if there is one.
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To be used before an index is invalided
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inline void invalidatePersistentIndex(const QModelIndex &index) {
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QHash<QModelIndex, QPersistentModelIndexData *>::iterator it = persistent.indexes.find(index);
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if(it != persistent.indexes.end()) {
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QPersistentModelIndexData *data = *it;
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persistent.indexes.erase(it);
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data->index = QModelIndex();
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Change() : first(-1), last(-1) {}
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Change(const Change &c) : parent(c.parent), first(c.first), last(c.last), needsAdjust(c.needsAdjust) {}
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Change(const QModelIndex &p, int f, int l) : parent(p), first(f), last(l), needsAdjust(false) {}
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// In cases such as this:
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// If B is moved to above E, C is the source parent in the signal and its row is 2. When the move is
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// completed however, C is at row 1 and there is no row 2 at the same level in the model at all.
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// The QModelIndex is adjusted to correct that in those cases before reporting it though the
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bool isValid() { return first >= 0 && last >= 0; }
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QStack<Change> changes;
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QHash<QModelIndex, QPersistentModelIndexData *> indexes;
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QStack<QVector<QPersistentModelIndexData *> > moved;
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QStack<QVector<QPersistentModelIndexData *> > invalidated;
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void insertMultiAtEnd(const QModelIndex& key, QPersistentModelIndexData *data);
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Qt::DropActions supportedDragActions;
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QHash<int,QByteArray> roleNames;
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static const QHash<int,QByteArray> &defaultRoleNames();
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#endif // QABSTRACTITEMMODEL_P_H