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// Copyright (C) 2008 Lukas Lalinsky
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#ifndef DATABASEMODEL_H
#define DATABASEMODEL_H
#include <QUndoStack>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QDomDocument>
#include <QGraphicsLineItem>
#include <QSet>
class DatabaseTable;
class DatabaseRelationship;
class DiagramItem;
class DiagramDocument : public QGraphicsScene
{
Q_OBJECT
public:
DiagramDocument(QObject *parent = 0);
enum Mode {
Select = 0,
AddTable,
AddRelation
};
Mode mode();
void setMode(Mode mode);
DatabaseTable *selectedTable();
void deleteSelectedItems();
QList<DatabaseRelationship *> findTableRelations(DatabaseTable *table);
void save(const QString &fileName);
void load(const QString &fileName);
QString fileName() { return m_fileName; }
void setFileName(const QString &fileName) { m_fileName = fileName; }
QUndoStack *undoStack() const { return m_undoStack; }
void itemMoved(DiagramItem *table);
void itemHasMoved(DiagramItem *table);
template <class T> QList<T *> itemsByType();
signals:
void modeChanged(DiagramDocument::Mode mode);
friend class DatabaseTable;
protected slots:
void updatePositions(DatabaseTable *table);
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event);
void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
private:
bool m_trackingMoves;
QMap<DiagramItem *, QPointF> m_movedItems;
QUndoStack *m_undoStack;
Mode m_mode;
QString m_fileName;
QGraphicsLineItem *m_line;
};
#endif
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