qgssinglebandpseudocolorrenderer.h

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/***************************************************************************
                         qgssinglebandpseudocolorrenderer.h
                         ----------------------------------
    begin                : January 2012
    copyright            : (C) 2012 by Marco Hugentobler
    email                : marco at sourcepole dot ch
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 QGSSINGLEBANDPSEUDOCOLORRENDERER_H
#define QGSSINGLEBANDPSEUDOCOLORRENDERER_H

#include "qgis_core.h"
#include "qgis.h"
#include "qgscolorramp.h"
#include "qgscolorrampshader.h"
#include "qgsrasterrenderer.h"
#include "qgsrectangle.h"

class QDomElement;
class QgsRasterShader;

class CORE_EXPORT QgsSingleBandPseudoColorRenderer: public QgsRasterRenderer
{

  public:

    QgsSingleBandPseudoColorRenderer( QgsRasterInterface *input, int band = -1, QgsRasterShader *shader SIP_TRANSFER = nullptr );

    QgsSingleBandPseudoColorRenderer( const QgsSingleBandPseudoColorRenderer & ) = delete;
    const QgsSingleBandPseudoColorRenderer &operator=( const QgsSingleBandPseudoColorRenderer & ) = delete;

    QgsSingleBandPseudoColorRenderer *clone() const override SIP_FACTORY;

    static QgsRasterRenderer *create( const QDomElement &elem, QgsRasterInterface *input ) SIP_FACTORY;

    QgsRasterBlock *block( int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback = nullptr ) override SIP_FACTORY;

    void setShader( QgsRasterShader *shader SIP_TRANSFER );

    QgsRasterShader *shader() { return mShader.get(); }

    const QgsRasterShader *shader() const SIP_PYNAME( constShader ) { return mShader.get(); }

    void createShader( QgsColorRamp *colorRamp SIP_TRANSFER = nullptr,
                       QgsColorRampShader::Type colorRampType  = QgsColorRampShader::Interpolated,
                       QgsColorRampShader::ClassificationMode classificationMode = QgsColorRampShader::Continuous,
                       int classes = 0,
                       bool clip = false,
                       const QgsRectangle &extent = QgsRectangle() );

    void writeXml( QDomDocument &doc, QDomElement &parentElem ) const override;

    void legendSymbologyItems( QList< QPair< QString, QColor > > &symbolItems SIP_OUT ) const override;

    QList<int> usesBands() const override;

    int band() const { return mBand; }

    void setBand( int bandNo );

    double classificationMin() const { return mClassificationMin; }
    double classificationMax() const { return mClassificationMax; }
    void setClassificationMin( double min );
    void setClassificationMax( double max );

  private:
#ifdef SIP_RUN
    QgsSingleBandPseudoColorRenderer( const QgsSingleBandPseudoColorRenderer & );
    const QgsSingleBandPseudoColorRenderer &operator=( const QgsSingleBandPseudoColorRenderer & );
#endif

    std::unique_ptr< QgsRasterShader > mShader;
    int mBand;

    // Minimum and maximum values used for automatic classification, these
    // values are not used by renderer in rendering process
    double mClassificationMin;
    double mClassificationMax;

};

#endif // QGSSINGLEBANDPSEUDOCOLORRENDERER_H