C++ (Cpp) QgsRasterRenderer::readXML Examples

Example #1

File: qgssinglebandcolordatarenderer.cpp Project: AaronGaim/QGIS

QgsRasterRenderer* QgsSingleBandColorDataRenderer::create( const QDomElement& elem, QgsRasterInterface* input )
{
  if ( elem.isNull() )
  {
    return 0;
  }

  int band = elem.attribute( "band", "-1" ).toInt();
  QgsRasterRenderer* r = new QgsSingleBandColorDataRenderer( input, band );
  r->readXML( elem );
  return r;
}

Example #2

QgsRasterRenderer* QgsMultiBandColorRenderer::create( const QDomElement& elem, QgsRasterInterface* input )
{
  if ( elem.isNull() )
  {
    return 0;
  }

  //red band, green band, blue band
  int redBand = elem.attribute( "redBand", "-1" ).toInt();
  int greenBand = elem.attribute( "greenBand", "-1" ).toInt();
  int blueBand = elem.attribute( "blueBand", "-1" ).toInt();

  //contrast enhancements
  QgsContrastEnhancement* redContrastEnhancement = 0;
  QDomElement redContrastElem = elem.firstChildElement( "redContrastEnhancement" );
  if ( !redContrastElem.isNull() )
  {
    redContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
          input->dataType( redBand ) ) );
    redContrastEnhancement->readXML( redContrastElem );
  }

  QgsContrastEnhancement* greenContrastEnhancement = 0;
  QDomElement greenContrastElem = elem.firstChildElement( "greenContrastEnhancement" );
  if ( !greenContrastElem.isNull() )
  {
    greenContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
          input->dataType( greenBand ) ) );
    greenContrastEnhancement->readXML( greenContrastElem );
  }

  QgsContrastEnhancement* blueContrastEnhancement = 0;
  QDomElement blueContrastElem = elem.firstChildElement( "blueContrastEnhancement" );
  if ( !blueContrastElem.isNull() )
  {
    blueContrastEnhancement = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
          input->dataType( blueBand ) ) );
    blueContrastEnhancement->readXML( blueContrastElem );
  }

  QgsRasterRenderer* r = new QgsMultiBandColorRenderer( input, redBand, greenBand, blueBand, redContrastEnhancement,
      greenContrastEnhancement, blueContrastEnhancement );
  r->readXML( elem );
  return r;
}

Example #3

File: qgssinglebandpseudocolorrenderer.cpp Project: sebastiangz/Quantum-GIS

QgsRasterRenderer* QgsSingleBandPseudoColorRenderer::create( const QDomElement& elem, QgsRasterDataProvider* provider )
{
  if ( elem.isNull() )
  {
    return 0;
  }

  int band = elem.attribute( "band", "-1" ).toInt();
  QgsRasterShader* shader = 0;
  QDomElement rasterShaderElem = elem.firstChildElement( "rastershader" );
  if ( !rasterShaderElem.isNull() )
  {
    shader = new QgsRasterShader();
    shader->readXML( rasterShaderElem );
  }
  QgsRasterRenderer* r = new QgsSingleBandPseudoColorRenderer( provider, band, shader );
  r->readXML( elem );
  return r;
}