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Diffstat (limited to 'src/corelib/kernel/qabstractitemmodel_p.h')
| -rw-r--r-- | src/corelib/kernel/qabstractitemmodel_p.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/corelib/kernel/qabstractitemmodel_p.h b/src/corelib/kernel/qabstractitemmodel_p.h new file mode 100644 index 0000000000..dfe5cef86a --- /dev/null +++ b/src/corelib/kernel/qabstractitemmodel_p.h @@ -0,0 +1,176 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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()) {} + void removePersistentIndexData(QPersistentModelIndexData *data); + void movePersistentIndexes(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 |