198 lines
4.9 KiB
C++
198 lines
4.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2009 Stephen Kelly <steveire@gmail.com>
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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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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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef DYNAMICTREEMODEL_H
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#define DYNAMICTREEMODEL_H
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#include <QtCore/QAbstractItemModel>
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#include <QtCore/QHash>
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#include <QtCore/QList>
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class DynamicTreeModel : public QAbstractItemModel
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{
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Q_OBJECT
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public:
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DynamicTreeModel(QObject *parent = 0);
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QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
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QModelIndex parent(const QModelIndex &index) const;
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int rowCount(const QModelIndex &index = QModelIndex()) const;
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int columnCount(const QModelIndex &index = QModelIndex()) const;
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QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
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void clear();
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protected slots:
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/**
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Finds the parent id of the string with id @p searchId.
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Returns -1 if not found.
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*/
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qint64 findParentId(qint64 searchId) const;
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private:
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QHash<qint64, QString> m_items;
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QHash<qint64, QList<QList<qint64> > > m_childItems;
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qint64 nextId;
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qint64 newId() { return nextId++; };
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QModelIndex m_nextParentIndex;
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int m_nextRow;
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int m_depth;
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int maxDepth;
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friend class ModelInsertCommand;
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friend class ModelMoveCommand;
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friend class ModelResetCommand;
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friend class ModelResetCommandFixed;
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};
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class ModelChangeCommand : public QObject
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{
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Q_OBJECT
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public:
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explicit ModelChangeCommand( DynamicTreeModel *model, QObject *parent = 0 );
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virtual ~ModelChangeCommand() {}
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void setAncestorRowNumbers(QList<int> rowNumbers) { m_rowNumbers = rowNumbers; }
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QModelIndex findIndex(QList<int> rows);
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void setStartRow(int row) { m_startRow = row; }
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void setEndRow(int row) { m_endRow = row; }
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void setNumCols(int cols) { m_numCols = cols; }
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virtual void doCommand() = 0;
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protected:
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DynamicTreeModel* m_model;
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QList<int> m_rowNumbers;
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int m_numCols;
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int m_startRow;
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int m_endRow;
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};
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typedef QList<ModelChangeCommand*> ModelChangeCommandList;
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class ModelInsertCommand : public ModelChangeCommand
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{
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Q_OBJECT
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public:
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explicit ModelInsertCommand(DynamicTreeModel *model, QObject *parent = 0 );
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virtual ~ModelInsertCommand() {}
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virtual void doCommand();
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};
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class ModelMoveCommand : public ModelChangeCommand
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{
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Q_OBJECT
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public:
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ModelMoveCommand(DynamicTreeModel *model, QObject *parent);
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virtual ~ModelMoveCommand() {}
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virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
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virtual void doCommand();
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virtual void emitPostSignal();
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void setDestAncestors( QList<int> rows ) { m_destRowNumbers = rows; }
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void setDestRow(int row) { m_destRow = row; }
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protected:
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QList<int> m_destRowNumbers;
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int m_destRow;
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};
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/**
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A command which does a move and emits a reset signal.
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*/
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class ModelResetCommand : public ModelMoveCommand
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{
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Q_OBJECT
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public:
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explicit ModelResetCommand(DynamicTreeModel* model, QObject* parent = 0);
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virtual ~ModelResetCommand();
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virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
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virtual void emitPostSignal();
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};
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/**
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A command which does a move and emits a beginResetModel and endResetModel signals.
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*/
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class ModelResetCommandFixed : public ModelMoveCommand
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{
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Q_OBJECT
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public:
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explicit ModelResetCommandFixed(DynamicTreeModel* model, QObject* parent = 0);
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virtual ~ModelResetCommandFixed();
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virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd, const QModelIndex &destParent, int destRow);
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virtual void emitPostSignal();
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};
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#endif
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