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/*
Copyright (c) 2009 Stephen Kelly <steveire@gmail.com>
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#ifndef DYNAMICTREEMODEL_H
#define DYNAMICTREEMODEL_H
#include <QAbstractItemModel>
#include <QHash>
#include <QList>
#include <QDebug>
#include <kdebug.h>
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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