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d03844d24e
from a raster layer Adds an easy way to style discrete rasters such as landuse classes using the Paletted renderer. Just select the Paletted renderer, pick a band, then hit the "Add Unique Values" button. The unique pixel values will be fetched from the layer and a color assigned to each using the currently selected color ramp. Fix #14845 Sponsored by - Stéphane Henriod - Satelligence (http://satelligence.com/) - Bird's Eye View (https://www.birdseyeviewgis.com/) - + other anonymous backers
50 lines
2.0 KiB
Plaintext
50 lines
2.0 KiB
Plaintext
class QgsPalettedRasterRenderer : QgsRasterRenderer
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{
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%TypeHeaderCode
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#include "qgspalettedrasterrenderer.h"
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%End
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public:
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struct Class
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{
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Class( int value, const QColor &color = QColor(), const QString &label = QString() );
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int value;
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QColor color;
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QString label;
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};
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typedef QList< QgsPalettedRasterRenderer::Class > ClassData;
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QgsPalettedRasterRenderer( QgsRasterInterface *input, int bandNumber, const ClassData &classes );
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~QgsPalettedRasterRenderer();
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virtual QgsPalettedRasterRenderer * clone() const /Factory/;
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static QgsRasterRenderer* create( const QDomElement& elem, QgsRasterInterface* input ) /Factory/;
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QgsRasterBlock *block( int bandNo, const QgsRectangle & extent, int width, int height, QgsRasterBlockFeedback* feedback = nullptr ) /Factory/;
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/** Returns number of colors*/
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int nColors() const;
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ClassData classes() const;
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QString label( int idx ) const;
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void setLabel( int idx, const QString &label );
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void writeXml( QDomDocument &doc, QDomElement &parentElem ) const;
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void legendSymbologyItems( QList< QPair< QString, QColor > > &symbolItems /Out/ ) const;
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QList<int> usesBands() const;
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void setSourceColorRamp( QgsColorRamp *ramp /Transfer/ );
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QgsColorRamp *sourceColorRamp() const;
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static QgsPalettedRasterRenderer::ClassData colorTableToClassData( const QList<QgsColorRampShader::ColorRampItem> &table );
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static QgsPalettedRasterRenderer::ClassData classDataFromString( const QString &string );
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static QgsPalettedRasterRenderer::ClassData classDataFromFile( const QString &path );
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static QString classDataToString( const QgsPalettedRasterRenderer::ClassData &classes );
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static QgsPalettedRasterRenderer::ClassData classDataFromRaster( QgsRasterInterface *raster, int bandNumber, QgsColorRamp *ramp = 0 );
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private:
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QgsPalettedRasterRenderer( const QgsPalettedRasterRenderer& );
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const QgsPalettedRasterRenderer& operator=( const QgsPalettedRasterRenderer& );
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};
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