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This new renderer draws contour lines that are calculated on the fly from the source raster band. It is possible to set interval of contour lines and symbol used for drawing. In addition there is support for "index contours" - contour lines with higher interval, typically drawn with a wider line symbol. If we generate contour lines on input raster block with the same size as our output raster block, the generated lines would contain too much detail. This detail can be reduced by the "downscale" factor - this will request lower resolution of the source raster.
123 lines
3.8 KiB
Plaintext
123 lines
3.8 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/raster/qgsrastercontourrenderer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsRasterContourRenderer : QgsRasterRenderer
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{
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%Docstring
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Raster renderer that generates contours on the fly for a source raster band.
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.. versionadded:: 3.14
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%End
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%TypeHeaderCode
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#include "qgsrastercontourrenderer.h"
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%End
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public:
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explicit QgsRasterContourRenderer( QgsRasterInterface *input );
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%Docstring
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Creates a contour renderer
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%End
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~QgsRasterContourRenderer();
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virtual QgsRasterContourRenderer *clone() const /Factory/;
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%Docstring
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QgsRasterContourRenderer cannot be copied. Use clone() instead.
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%End
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static QgsRasterRenderer *create( const QDomElement &elem, QgsRasterInterface *input ) /Factory/;
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virtual void writeXml( QDomDocument &doc, QDomElement &parentElem ) const;
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virtual QgsRasterBlock *block( int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback = 0 ) /Factory/;
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virtual QList<int> usesBands() const;
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int inputBand() const;
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%Docstring
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Returns the number of the input raster band
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%End
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void setInputBand( int band );
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%Docstring
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Sets the number of the input raster band
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%End
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double contourInterval() const;
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%Docstring
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Returns the interval of contour lines generation
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%End
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void setContourInterval( double interval );
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%Docstring
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Sets the interval of contour lines generation
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%End
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QgsLineSymbol *contourSymbol() const;
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%Docstring
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Returns the symbol used for contour lines
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%End
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void setContourSymbol( QgsLineSymbol *symbol /Transfer/ );
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%Docstring
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Sets the symbol used for contour lines. Takes ownership of the passed symbol
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%End
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double contourIndexInterval() const;
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%Docstring
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Returns the interval of index contour lines (index contour lines are typical further apart and with a wider line symbol)
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%End
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void setContourIndexInterval( double interval );
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%Docstring
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Sets the interval of index contour lines (index contour lines are typical further apart and with a wider line symbol)
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%End
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QgsLineSymbol *contourIndexSymbol() const;
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%Docstring
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Returns the symbol of index contour lines
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%End
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void setContourIndexSymbol( QgsLineSymbol *symbol /Transfer/ );
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%Docstring
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Sets the symbol of index contour lines
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%End
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double downscale() const;
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%Docstring
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Returns by how much the renderer will scale down the request to the data provider.
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For example, for a raster block 1000x500 with downscale 10, the renderer will request raster 100x50 from provider.
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Higher downscale makes contour lines more simplified (at the expense of loosing some detail).
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The value of one means there will be no downscaling.
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%End
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void setDownscale( double scale );
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%Docstring
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Sets by how much the renderer will scale down the request to the data provider.
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.. seealso:: :py:func:`downscale`
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%End
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private:
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QgsRasterContourRenderer( const QgsRasterContourRenderer & );
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const QgsRasterContourRenderer &operator=( const QgsRasterContourRenderer & );
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/raster/qgsrastercontourrenderer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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