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 "qgis_gui.h"
#include "qgis_sip.h"
#include "qgsrectangle.h"
 
#include <QGraphicsItem>
 
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;

    QgsMapCanvas *canvas() const { return mMapCanvas; }
 
  protected:
    QgsMapCanvas *mMapCanvas = nullptr;

    QgsRectangle mRect;
 
    double mRectRotation = 0.0;

    QSizeF mItemSize;
};
 
 
#endif