qgsmaskpaintdevice.h

Go to the documentation of this file.

/***************************************************************************
  qgsmaskpaintdevice.h
  --------------------------------------
  Date                 : February 2022
  Copyright            : (C) 2022 by Julien Cabieces
  Email                : julien dot cabieces at oslandia 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 QGSMASKPAINTDEVICE_H
#define QGSMASKPAINTDEVICE_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
 
#include <QPainterPath>
#include <QPaintDevice>
#include <QPaintEngine>
#include <memory>
 
#ifndef SIP_RUN
class QgsMaskPaintEngine: public QPaintEngine
{
 
  public:
 
    QgsMaskPaintEngine( bool usePathStroker = false );
 
    bool begin( QPaintDevice * ) override { return true; };
    bool end() override { return true; };
    QPaintEngine::Type type() const override { return QPaintEngine::User; };
    void updateState( const QPaintEngineState & ) override { return; };
 
    void drawPath( const QPainterPath & ) override;
    void drawPolygon( const QPointF *, int, PolygonDrawMode ) override;
    void drawPixmap( const QRectF &, const QPixmap &, const QRectF & ) override { return; };
 
    QPainterPath maskPainterPath() const;
 
  private:
 
    bool mUsePathStroker = false;
    QPainterPath mMaskPainterPath;
 
};
#endif
 
 
class CORE_EXPORT QgsMaskPaintDevice: public QPaintDevice
{
 
  public:
 
    QgsMaskPaintDevice( bool usePathStroker = false );
 
    QPaintEngine *paintEngine() const override;
 
    int metric( PaintDeviceMetric metric ) const override;
 
    QPainterPath maskPainterPath() const;
 
  private:
 
    std::unique_ptr<QgsMaskPaintEngine> mPaintEngine;
 
    QSize mSize;
 
};
 
 
#endif // QGSMASKPAINTDEVICE_H