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// Copyright (C) 2009 Stephen Kelly <steveire@gmail.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef DYNAMICTREEMODEL_H
#define DYNAMICTREEMODEL_H
#include <QtCore/QAbstractItemModel>
#include <QtCore/QHash>
#include <QtCore/QList>
class DynamicTreeModel : public QAbstractItemModel
{
Q_OBJECT
public:
DynamicTreeModel(QObject *parent = nullptr);
QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
QModelIndex parent(const QModelIndex &index) const override;
int rowCount(const QModelIndex &index = QModelIndex()) const override;
int columnCount(const QModelIndex &index = QModelIndex()) const override;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
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;
friend class ModelChangeChildrenLayoutsCommand;
};
class ModelChangeCommand : public QObject
{
Q_OBJECT
public:
ModelChangeCommand(DynamicTreeModel *model, QObject *parent = nullptr);
virtual ~ModelChangeCommand()
{
}
void setAncestorRowNumbers(QList<int> rowNumbers)
{
m_rowNumbers = rowNumbers;
}
QModelIndex findIndex(const QList<int> &rows) const;
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 = nullptr);
virtual ~ModelInsertCommand()
{
}
virtual void doCommand() override;
};
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() override;
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 = nullptr);
virtual ~ModelResetCommand();
virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd,
const QModelIndex &destParent, int destRow) override;
virtual void emitPostSignal() override;
};
/**
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 = nullptr);
virtual ~ModelResetCommandFixed();
virtual bool emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd,
const QModelIndex &destParent, int destRow) override;
virtual void emitPostSignal() override;
};
class ModelChangeChildrenLayoutsCommand : public ModelChangeCommand
{
Q_OBJECT
public:
ModelChangeChildrenLayoutsCommand(DynamicTreeModel *model, QObject *parent);
virtual ~ModelChangeChildrenLayoutsCommand()
{
}
virtual void doCommand() override;
void setSecondAncestorRowNumbers(QList<int> rows)
{
m_secondRowNumbers = rows;
}
protected:
QList<int> m_secondRowNumbers;
int m_destRow;
};
#endif
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