GraphicsView.h

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/****************************************************************************

Copyright (c) 2008 Deepak Chandran
Contact: Deepak Chandran (dchandran1@gmail.com)
See COPYRIGHT.TXT

This file defines the GraphicsView class that is used to view the contents
of a GraphicsScene. The class inherits from QGraphicsView. 

****************************************************************************/

#ifndef TINKERCELL_GRAPHICSVIEW_H
#define TINKERCELL_GRAPHICSVIEW_H

#include <stdlib.h>
#include <QtGui>
#include <QString>
#include <QPair>
#include <QFileDialog>
#include <QtDebug>
#include <QGraphicsItem>
#include <QGraphicsItemGroup>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QAction>
#include <QPixmap>
#include <QMenu>
#include <QFile>
#include <QHBoxLayout>
#include <QMainWindow>
#include <QHash>
#include <QUndoCommand>
#include <QGraphicsItemAnimation>
#include <QPrinter>

#include "DataTable.h"
#include "HistoryWindow.h"
#include "SymbolsTable.h"
#include "CloneItems.h"

namespace Tinkercell
{
        class SetGraphicsViewVisibilityCommand;

        class NodeGraphicsItem;
        class ConnectionGraphicsItem;
        class ItemHandle;
        class ItemData;
        class NetworkWindow;
        class GraphicsScene;

        class TINKERCELLCOREEXPORT GraphicsView : public QGraphicsView
        {
                Q_OBJECT
        
        public:
                static qreal DEFAULT_ZOOM;
        
        private:
                QPixmap background;
                QPixmap foreground;
                GraphicsScene * scene;
                virtual QSize sizeHint() const;
                GraphicsView(NetworkWindow * networkWindow = 0);                

        signals:
                void itemsDropped(GraphicsScene*, const QString&, QPointF);
        protected:
                virtual void drawBackground( QPainter * painter, const QRectF & rect );
                virtual void drawForeground( QPainter * painter, const QRectF & rect );
                virtual void dropEvent(QDropEvent *);
                virtual void dragEnterEvent(QDragEnterEvent *event);
                virtual void dragMoveEvent(QDragMoveEvent *event);
                virtual void wheelEvent(QWheelEvent * event);
                virtual void scrollContentsBy ( int dx, int dy );
                virtual void mousePressEvent ( QMouseEvent * event );
                virtual void keyPressEvent ( QKeyEvent * event );
                virtual void mouseMoveEvent ( QMouseEvent * event );

                friend class GraphicsScene;
                friend class NetworkWindow;
                friend class NetworkHandle;
                friend class MainWindow;
        };
}

#endif