24#include <QCoreApplication>
25#include <QDomDocument>
77 if ( !
input )
return false;
127 return QList< QPair< QString, QColor > >();
132 QList<QgsLayerTreeModelLegendNode *> nodes;
135 if ( rasterItemList.isEmpty() )
141 const int max_count = 1000;
143 for (
auto itemIt = rasterItemList.constBegin(); itemIt != rasterItemList.constEnd(); ++itemIt, ++count )
147 if ( count == max_count )
149 const QString label = tr(
"following %n item(s) not displayed",
nullptr, rasterItemList.size() - max_count );
160 if ( rasterRendererElem.isNull() )
165 rasterRendererElem.setAttribute( QStringLiteral(
"type" ),
mType );
166 rasterRendererElem.setAttribute( QStringLiteral(
"opacity" ), QString::number(
mOpacity ) );
167 rasterRendererElem.setAttribute( QStringLiteral(
"alphaBand" ),
mAlphaBand );
168 rasterRendererElem.setAttribute( QStringLiteral(
"nodataColor" ), mNodataColor.isValid() ?
QgsColorUtils::colorToString( mNodataColor ) : QString() );
175 QDomElement minMaxOriginElem = doc.createElement( QStringLiteral(
"minMaxOrigin" ) );
177 rasterRendererElem.appendChild( minMaxOriginElem );
182 if ( !mNodataColor.isValid() )
185 return mNodataColor.rgba();
190 if ( rendererElem.isNull() )
195 mType = rendererElem.attribute( QStringLiteral(
"type" ) );
196 mOpacity = rendererElem.attribute( QStringLiteral(
"opacity" ), QStringLiteral(
"1.0" ) ).toDouble();
197 mAlphaBand = rendererElem.attribute( QStringLiteral(
"alphaBand" ), QStringLiteral(
"-1" ) ).toInt();
198 const QString colorEncoded = rendererElem.attribute( QStringLiteral(
"nodataColor" ) );
201 const QDomElement rasterTransparencyElem = rendererElem.firstChildElement( QStringLiteral(
"rasterTransparency" ) );
202 if ( !rasterTransparencyElem.isNull() )
209 const QDomElement minMaxOriginElem = rendererElem.firstChildElement( QStringLiteral(
"minMaxOrigin" ) );
210 if ( !minMaxOriginElem.isNull() )
225 if ( copyMinMaxOrigin )
231 QDomElement rasterSymbolizerElem = doc.createElement( QStringLiteral(
"sld:RasterSymbolizer" ) );
232 element.appendChild( rasterSymbolizerElem );
237 QDomElement opacityElem = doc.createElement( QStringLiteral(
"sld:Opacity" ) );
238 opacityElem.appendChild( doc.createTextNode( QString::number(
opacity() ) ) );
239 rasterSymbolizerElem.appendChild( opacityElem );
QFlags< RasterRendererFlag > RasterRendererFlags
Flags which control behavior of raster renderers.
DataType
Raster data types.
@ ARGB32_Premultiplied
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32_Premultiplied.
@ UnknownDataType
Unknown or unspecified type.
static QColor colorFromString(const QString &string)
Decodes a string into a color value.
static QString colorToString(const QColor &color)
Encodes a color into a string value.
Layer tree node points to a map layer.
static bool typeIsNumeric(Qgis::DataType type)
Returns true if data type is numeric.
Base class for processing filters like renderers, reprojector, resampler etc.
virtual Qgis::DataType dataType(int bandNo) const =0
Returns data type for the band specified by number.
virtual int bandCount() const =0
Gets number of bands.
QgsRasterInterface * mInput
virtual QgsRasterInterface * input() const
Current input.
void writeXml(QDomDocument &doc, QDomElement &parentElem) const
Serialize object.
void readXml(const QDomElement &elem)
Deserialize object.
Raster renderer pipe that applies colors to a raster.
QColor nodataColor() const
Returns the color to use for shading nodata pixels.
QgsRasterRenderer(QgsRasterInterface *input=nullptr, const QString &type=QString())
Constructor for QgsRasterRenderer.
virtual bool canCreateRasterAttributeTable() const
Returns true if the renderer is suitable for attribute table creation.
double mOpacity
Global alpha value (0-1)
bool setInput(QgsRasterInterface *input) override
Set input.
void setMinMaxOrigin(const QgsRasterMinMaxOrigin &origin)
Sets origin of min/max values.
~QgsRasterRenderer() override
virtual int inputBand() const
Returns the input band for the renderer, or -1 if no input band is available.
int mAlphaBand
Read alpha value from band.
virtual bool setInputBand(int band)
Attempts to set the input band for the renderer.
QRgb renderColorForNodataPixel() const
Returns the color for the renderer to use to represent nodata pixels.
const QgsRasterTransparency * rasterTransparency() const
virtual Qgis::RasterRendererFlags flags() const
Returns flags which dictate renderer behavior.
const QgsRasterMinMaxOrigin & minMaxOrigin() const
Returns const reference to origin of min/max values.
void _writeXml(QDomDocument &doc, QDomElement &rasterRendererElem) const
Write upper class info into rasterrenderer element (called by writeXml method of subclasses)
int bandCount() const override
Gets number of bands.
double opacity() const
Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1....
void setAlphaBand(int band)
void setOpacity(double opacity)
Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1....
QgsRasterMinMaxOrigin mMinMaxOrigin
Origin of min/max values.
QgsRasterTransparency * mRasterTransparency
Raster transparency per color or value. Overwrites global alpha value.
virtual QList< QgsLayerTreeModelLegendNode * > createLegendNodes(QgsLayerTreeLayer *nodeLayer)
Creates a set of legend nodes representing the renderer.
void setRasterTransparency(QgsRasterTransparency *t)
virtual bool accept(QgsStyleEntityVisitorInterface *visitor) const
Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer...
bool usesTransparency() const
void copyCommonProperties(const QgsRasterRenderer *other, bool copyMinMaxOrigin=true)
Copies common properties like opacity / transparency data from other renderer.
static const QRgb NODATA_COLOR
virtual void toSld(QDomDocument &doc, QDomElement &element, const QVariantMap &props=QVariantMap()) const
Used from subclasses to create SLD Rule elements following SLD v1.0 specs.
void setNodataColor(const QColor &color)
Sets the color to use for shading nodata pixels.
virtual QList< QPair< QString, QColor > > legendSymbologyItems() const
Returns symbology items if provided by renderer.
void readXml(const QDomElement &rendererElem) override
Sets base class members from xml. Usually called from create() methods of subclasses.
Qgis::DataType dataType(int bandNo) const override
Returns data type for the band specified by number.
Implementation of legend node interface for displaying raster legend entries.
Defines the list of pixel values to be considered as transparent or semi transparent when rendering r...
void writeXml(QDomDocument &doc, QDomElement &parentElem) const
Writes the transparency information to an XML document.
bool isEmpty() const
True if there are no entries in the pixel lists except the nodata value.
void readXml(const QDomElement &elem)
Reads the transparency information from an XML document.
Implementation of legend node interface for displaying arbitrary label with icon.
An interface for classes which can visit style entity (e.g.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
#define QgsDebugMsgLevel(str, level)