qgsrastercontourrenderer.h

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/***************************************************************************
  qgsrastercontourrenderer.h
  --------------------------------------
  Date                 : March 2020
  Copyright            : (C) 2020 by Martin Dobias
  Email                : wonder dot 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 QGSRASTERCONTOURRENDERER_H
#define QGSRASTERCONTOURRENDERER_H
 
 
#include "qgsrasterrenderer.h"
 
class QgsLineSymbol;

class CORE_EXPORT QgsRasterContourRenderer : public QgsRasterRenderer
{
  public:
    explicit QgsRasterContourRenderer( QgsRasterInterface *input );
    ~QgsRasterContourRenderer() override;

    QgsRasterContourRenderer( const QgsRasterContourRenderer & ) = delete;
    const QgsRasterContourRenderer &operator=( const QgsRasterContourRenderer & ) = delete;
 
    QgsRasterContourRenderer *clone() const override SIP_FACTORY;
    Qgis::RasterRendererFlags flags() const override;

    static QgsRasterRenderer *create( const QDomElement &elem, QgsRasterInterface *input ) SIP_FACTORY;
 
    void writeXml( QDomDocument &doc, QDomElement &parentElem ) const override;
 
    QgsRasterBlock *block( int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback = nullptr ) override SIP_FACTORY;
 
    QList<int> usesBands() const override;
    QList<QgsLayerTreeModelLegendNode *> createLegendNodes( QgsLayerTreeLayer *nodeLayer ) SIP_FACTORY override;
    int inputBand() const override;
    bool setInputBand( int band ) override;

    double contourInterval() const { return mContourInterval; }
    void setContourInterval( double interval ) { mContourInterval = interval; }

    QgsLineSymbol *contourSymbol() const { return mContourSymbol.get(); }
    void setContourSymbol( QgsLineSymbol *symbol SIP_TRANSFER );

    double contourIndexInterval() const { return mContourIndexInterval; }
    void setContourIndexInterval( double interval ) { mContourIndexInterval = interval; }

    QgsLineSymbol *contourIndexSymbol() const { return mContourIndexSymbol.get(); }
    void setContourIndexSymbol( QgsLineSymbol *symbol SIP_TRANSFER );

    double downscale() const { return mDownscale; }

    void setDownscale( double scale ) { mDownscale = scale; }
 
  private:
 
#ifdef SIP_RUN
    QgsRasterContourRenderer( const QgsRasterContourRenderer & );
    const QgsRasterContourRenderer &operator=( const QgsRasterContourRenderer & );
#endif
 
    std::unique_ptr<QgsLineSymbol> mContourSymbol;   // should not be null
    std::unique_ptr<QgsLineSymbol> mContourIndexSymbol;  // may be null
    double mDownscale = 8.;
    double mContourInterval = 100.;
    double mContourIndexInterval = 0.;
    int mInputBand = 1;
};
 
 
#endif // QGSRASTERCONTOURRENDERER_H