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/****************************************************************************
**
** Copyright (C) 2009 Stephen Kelly <steveire@gmail.com>
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite 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 DYNAMICTREEMODEL_H
#define DYNAMICTREEMODEL_H
#include <QtCore/QAbstractItemModel>
#include <QtCore/QHash>
#include <QtCore/QList>
template<typename T> class QList;
class DynamicTreeModel : public QAbstractItemModel
{
Q_OBJECT
public:
DynamicTreeModel(QObject *parent = 0);
QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex &index) const;
int rowCount(const QModelIndex &index = QModelIndex()) const;
int columnCount(const QModelIndex &index = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
void clear();
protected slots:
/**
Finds the parent id of the string with id @p searchId.
Returns -1 if not found.
*/
qint64 findParentId(qint64 searchId) const;
private:
QHash<qint64, QString> m_items;
QHash<qint64, QList<QList<qint64> > > m_childItems;
qint64 nextId;
qint64 newId() { return nextId++; };
QModelIndex m_nextParentIndex;
int m_nextRow;
int m_depth;
int maxDepth;
friend class ModelInsertCommand;
friend class ModelMoveCommand;
friend class ModelResetCommand;
friend class ModelResetCommandFixed;
};
class ModelChangeCommand : public QObject
{
Q_OBJECT
public:
ModelChangeCommand( DynamicTreeModel *model, QObject *parent = 0 );
virtual ~ModelChangeCommand() {}
void setAncestorRowNumbers(QList<int> rowNumbers) { m_rowNumbers = rowNumbers; }
QModelIndex findIndex(QList<int> rows);
void setStartRow(int row) { m_startRow = row; }
void setEndRow(int row) { m_endRow = row; }
void setNumCols(int cols) { m_numCols = cols; }
virtual void doCommand() = 0;
protected:
DynamicTreeModel* m_model;
QList<int> m_rowNumbers;
int m_numCols;
int m_startRow;
int m_endRow;
};
typedef QList<ModelChangeCommand*> ModelChangeCommandList;
class ModelInsertCommand : public ModelChangeCommand
{
Q_OBJECT
public:
ModelInsertCommand(DynamicTreeModel *model, QObject *parent = 0 );
virtual ~ModelInsertCommand() {}
virtual void doCommand();
};
class ModelMoveCommand : public ModelChangeCommand
{
Q_OBJECT
public:
ModelMoveCommand(DynamicTreeModel *model, QObject *parent);
virtual ~ModelMoveCommand() {}
virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
virtual void doCommand();
virtual void emitPostSignal();
void setDestAncestors( QList<int> rows ) { m_destRowNumbers = rows; }
void setDestRow(int row) { m_destRow = row; }
protected:
QList<int> m_destRowNumbers;
int m_destRow;
};
/**
A command which does a move and emits a reset signal.
*/
class ModelResetCommand : public ModelMoveCommand
{
Q_OBJECT
public:
ModelResetCommand(DynamicTreeModel* model, QObject* parent = 0);
virtual ~ModelResetCommand();
virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
virtual void emitPostSignal();
};
/**
A command which does a move and emits a beginResetModel and endResetModel signals.
*/
class ModelResetCommandFixed : public ModelMoveCommand
{
Q_OBJECT
public:
ModelResetCommandFixed(DynamicTreeModel* model, QObject* parent = 0);
virtual ~ModelResetCommandFixed();
virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
virtual void emitPostSignal();
};
#endif
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