qgsmapcanvasitem.h

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/***************************************************************************
    qgsmapcanvasitem.h  - base class for map canvas items
    ----------------------
    begin                : February 2006
    copyright            : (C) 2006 by Martin Dobias
    email                : wonder.sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSMAPCANVASITEM_H
#define QGSMAPCANVASITEM_H

#include <QGraphicsItem>
#include "qgsrectangle.h"

class QgsMapCanvas;
class QgsRenderContext;
class QPainter;

class GUI_EXPORT QgsMapCanvasItem : public QGraphicsItem
{
  protected:

    QgsMapCanvasItem( QgsMapCanvas* mapCanvas );

    virtual ~QgsMapCanvasItem();

    virtual void paint( QPainter * painter ) = 0;

    virtual void paint( QPainter * painter,
                        const QStyleOptionGraphicsItem * option,
                        QWidget * widget = 0 );

    void updateCanvas();

    bool setRenderContextVariables( QPainter* p, QgsRenderContext& context ) const;

  public:

    virtual void updatePosition();

    virtual QRectF boundingRect() const;

    void setPanningOffset( const QPoint& point );

    QgsRectangle rect() const;

    void setRect( const QgsRectangle& r );

    QgsPoint toMapCoordinates( const QPoint& point );

    QPointF toCanvasCoordinates( const QgsPoint& point );

  protected:

    QgsMapCanvas* mMapCanvas;

    QgsRectangle mRect;

    QPoint mPanningOffset;

    QSizeF mItemSize;
};


#endif