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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 DATABASERELATION_H
#define DATABASERELATION_H
#include <QGraphicsItem>
#include <QPainter>
#include "databasemodelitem.h"
class DatabaseTable;
class DatabaseRelation : public DatabaseModelItem
{
public:
DatabaseRelation(QGraphicsItem *parent = 0);
QRectF boundingRect() const;
QPainterPath shape() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
DatabaseTable *source() { return m_source; }
void setSource(DatabaseTable *source);
DatabaseTable *target() { return m_target; }
void setTarget(DatabaseTable *target);
enum { Type = DatabaseModelItem::Relation };
virtual int type() const { return Type; }
void updatePositions();
protected slots:
void updateLayout();
protected:
QVariant itemChange(GraphicsItemChange change, const QVariant &value);
private:
DatabaseTable *m_source;
DatabaseTable *m_target;
QLineF m_line;
QPolygonF m_arrowHead;
};
#endif
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