writeXML for single band pseudo color renderer

Author: mhugent

src/core/raster/qgsrastershader.cpp

@@ -17,8 +17,10 @@ email                : ersts@amnh.org
  ***************************************************************************/
 
 #include "qgslogger.h"
-
+#include "qgscolorrampshader.h"
 #include "qgsrastershader.h"
+#include <QDomDocument>
+#include <QDomElement>
 
 QgsRasterShader::QgsRasterShader( double theMinimumValue, double theMaximumValue )
 {
@@ -124,3 +126,32 @@ void QgsRasterShader::setMinimumValue( double theValue )
     mRasterShaderFunction->setMinimumValue( theValue );
   }
 }
+
+void QgsRasterShader::writeXML( QDomDocument& doc, QDomElement& parent ) const
+{
+  if( parent.isNull() || !mRasterShaderFunction )
+  {
+    return;
+  }
+
+  QDomElement rasterShaderElem = doc.createElement( "rastershader" );
+  QgsColorRampShader* colorRampShader = dynamic_cast<QgsColorRampShader*>( mRasterShaderFunction );
+  if( colorRampShader )
+  {
+    QDomElement colorRampShaderElem = doc.createElement( "colorrampshader" );
+    colorRampShaderElem.setAttribute( "colorRampType", colorRampShader->colorRampTypeAsQString() );
+    //items
+    QList<QgsColorRampShader::ColorRampItem> itemList = colorRampShader->colorRampItemList();
+    QList<QgsColorRampShader::ColorRampItem>::const_iterator itemIt = itemList.constBegin();
+    for(; itemIt != itemList.constEnd(); ++itemIt )
+    {
+      QDomElement itemElem = doc.createElement( "item" );
+      itemElem.setAttribute( "label", itemIt->label );
+      itemElem.setAttribute( "value", itemIt->value );
+      itemElem.setAttribute( "color", itemIt->color.name() );
+      colorRampShaderElem.appendChild( itemElem );
+    }
+    rasterShaderElem.appendChild( colorRampShaderElem );
+  }
+  parent.appendChild( rasterShaderElem );
+}

src/core/raster/qgsrastershader.h

@@ -22,6 +22,9 @@ email                : ersts@amnh.org
 
 #include "qgsrastershaderfunction.h"
 
+class QDomDocument;
+class QDomElement;
+
 /** \ingroup core
  * Interface for all raster shaders.
  */
@@ -66,6 +69,8 @@ class CORE_EXPORT QgsRasterShader
     /** \brief Return the minimum value */
     void setMinimumValue( double );
 
+    void writeXML( QDomDocument& doc, QDomElement& parent ) const;
+
   private:
     /** \brief User defineable minimum value for the raster shader */
     double mMinimumValue;

src/core/raster/qgssinglebandpseudocolorrenderer.cpp

@@ -158,5 +158,9 @@ void QgsSingleBandPseudoColorRenderer::writeXML( QDomDocument& doc, QDomElement&
   QDomElement rasterRendererElem = doc.createElement( "rasterrenderer" );
   _writeXML( doc, rasterRendererElem );
   rasterRendererElem.setAttribute( "band", mBand );
+  if( mShader )
+  {
+    mShader->writeXML( doc, rasterRendererElem ); //todo: include color ramp items directly in this renderer
+  }
   parentElem.appendChild( rasterRendererElem );
 }