qgsmapcanvasitem.h

Go to the documentation of this file.

/***************************************************************************
    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 "qgis_sip.h"
#include "qgsrectangle.h"
#include "qgis_gui.h"

class QgsMapCanvas;
class QgsRenderContext;
class QPainter;

class GUI_EXPORT QgsMapCanvasItem : public QGraphicsItem
{
  protected:

    QgsMapCanvasItem( QgsMapCanvas *mapCanvas SIP_TRANSFERTHIS );

    ~QgsMapCanvasItem() override;

    virtual void paint( QPainter *painter ) = 0;

    void paint( QPainter *painter,
                const QStyleOptionGraphicsItem *option,
                QWidget *widget = nullptr ) override;

    void updateCanvas();

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

  public:

    virtual void updatePosition();

    QRectF boundingRect() const override;

    QgsRectangle rect() const;

    void setRect( const QgsRectangle &r, bool resetRotation = true );

    QgsPointXY toMapCoordinates( QPoint point ) const;

    QPointF toCanvasCoordinates( const QgsPointXY &point ) const;

  protected:

    QgsMapCanvas *mMapCanvas = nullptr;

    QgsRectangle mRect;

    double mRectRotation;

    QSizeF mItemSize;

};


#endif