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532eb58d1f
This commit implements the improvements described at: https://lists.osgeo.org/pipermail/qgis-developer/2016-September/044393.html The QgsRasterMinMaxWidget now offers a seetting to specify that the statistics should be computed each time the canvas extent changes. Other changes: - the content of the QgsRasterMinMaxWidget is now persistant. - there is no longer any Load button. The global Apply / OK button of the raster properties dialog has this effect. - the default "limits" for single band raster is now MinMax and not CumulativeCut - the default "limits" can be configured for single band, multi band single byte and multi band multi byte - "Strech using current extent" honours the "limits" instead of forcing min/max.
69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
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class QgsRasterRenderer : QgsRasterInterface
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{
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%TypeHeaderCode
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#include "qgsrasterrenderer.h"
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%End
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public:
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static const QRgb NODATA_COLOR;
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QgsRasterRenderer( QgsRasterInterface* input = 0, const QString& type = "" );
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virtual ~QgsRasterRenderer();
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virtual QgsRasterRenderer * clone() const = 0 /Factory/;
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virtual int bandCount() const;
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virtual Qgis::DataType dataType( int bandNo ) const;
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virtual QString type() const;
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virtual bool setInput( QgsRasterInterface* input );
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virtual QgsRasterBlock *block( int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback* feedback = nullptr ) = 0 / Factory /;
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bool usesTransparency() const;
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void setOpacity( double opacity );
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double opacity() const;
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void setRasterTransparency( QgsRasterTransparency* t /Transfer/);
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const QgsRasterTransparency* rasterTransparency() const;
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void setAlphaBand( int band );
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int alphaBand() const;
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/** Get symbology items if provided by renderer*/
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virtual void legendSymbologyItems( QList< QPair< QString, QColor > >& symbolItems ) const;
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/** Sets base class members from xml. Usually called from create() methods of subclasses*/
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void readXml( const QDomElement& rendererElem );
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/** Copies common properties like opacity / transparency data from other renderer.
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* Useful when cloning renderers.
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* @note added in 2.16 */
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void copyCommonProperties( const QgsRasterRenderer* other, bool copyMinMaxOrigin = true );
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/** Returns a list of band numbers used by the renderer*/
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virtual QList<int> usesBands() const;
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//! Returns const reference to origin of min/max values
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const QgsRasterMinMaxOrigin& minMaxOrigin() const;
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//! Sets origin of min/max values
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void setMinMaxOrigin( const QgsRasterMinMaxOrigin& theOrigin );
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protected:
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/** Write upper class info into rasterrenderer element (called by writeXML method of subclasses)*/
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void _writeXml( QDomDocument& doc, QDomElement& rasterRendererElem ) const;
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private:
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QgsRasterRenderer( const QgsRasterRenderer& );
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const QgsRasterRenderer& operator=( const QgsRasterRenderer& );
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};
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