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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>
#include <QUuid>
class DatabaseTable;
class DatabaseRelationship;
class Line;
class DiagramItem;
class DiagramObject;
class QPainter;
class QPrinter;
class DiagramDocument : public QGraphicsScene
{
Q_OBJECT
Q_ENUMS(Notation)
Q_PROPERTY(int gridSize READ gridSize WRITE setGridSize)
Q_PROPERTY(bool gridVisible READ isGridVisible WRITE setGridVisible)
Q_PROPERTY(QColor gridColor READ gridColor WRITE setGridColor)
Q_PROPERTY(Notation notation READ notation WRITE setNotation)
public:
DiagramDocument(QObject *parent = 0);
enum Mode {
Select = 0,
AddTable,
AddRelation
};
enum Notation {
Relational,
CrowsFoot
};
//! Returns the notation used in the diagram
Notation notation() const;
//! Sets the notation used in the diagram
void setNotation(Notation);
Mode mode();
void setMode(Mode mode);
DatabaseTable *selectedTable();
void deleteSelectedItems();
QList<DiagramItem *> selectedItems();
void save(const QString &fileName);
void load(const QString &fileName);
QString fileName() { return m_fileName; }
void setFileName(const QString &fileName) { m_fileName = fileName; }
DiagramItem *itemById(const QUuid &id);
QUndoStack *undoStack() const { return m_undoStack; }
void itemMoved(DiagramItem *table);
void itemHasMoved(DiagramItem *table);
QList<Line *> findConnections(DiagramObject *object);
template <class T> QList<T *> itemsByType();
int gridSize() const;
void setGridSize(int size);
bool isGridVisible() const;
void setGridVisible(bool visible);
QColor gridColor() const;
void setGridColor(const QColor &color);
bool isPrinting() const;
void setPrinting(bool printing);
void addItemLater(DiagramItem *item);
void removeItemLater(DiagramItem *item);
void print(QPainter *painter, const QRectF &target = QRectF(), const QRectF &source = QRectF());
void print(QPrinter *printer, const QRectF &target = QRectF(), const QRectF &source = QRectF());
signals:
void modeChanged(DiagramDocument::Mode mode);
friend class DatabaseTable;
public slots:
void updatePositions(DiagramObject *object, bool force = false);
void updateLineLayout(Line *line);
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event);
void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
private slots:
void _updateLines();
private:
class DiagramDocumentPrivate;
DiagramDocumentPrivate *const d;
void updateLines(QSet<DiagramObject *> objects);
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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