C++ (Cpp) QgsSingleBandGrayRenderer示例

示例#1

文件： qgssinglebandgrayrenderer.cpp 项目： nicanor-b/QGIS

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

  int grayBand = elem.attribute( "grayBand", "-1" ).toInt();
  QgsSingleBandGrayRenderer* r = new QgsSingleBandGrayRenderer( input, grayBand );
  r->readXML( elem );

  if ( elem.attribute( "gradient" ) == "WhiteToBlack" )
  {
    r->setGradient( WhiteToBlack );  // BlackToWhite is default
  }

  QDomElement contrastEnhancementElem = elem.firstChildElement( "contrastEnhancement" );
  if ( !contrastEnhancementElem.isNull() )
  {
    QgsContrastEnhancement* ce = new QgsContrastEnhancement(( QGis::DataType )(
          input->dataType( grayBand ) ) );
    ce->readXML( contrastEnhancementElem );
    r->setContrastEnhancement( ce );
  }
  return r;
}

示例#2

文件： qgssinglebandgrayrendererwidget.cpp 项目： CS-SI/QGIS

QgsRasterRenderer *QgsSingleBandGrayRendererWidget::renderer()
{
  if ( !mRasterLayer )
  {
    return nullptr;
  }
  QgsRasterDataProvider *provider = mRasterLayer->dataProvider();
  if ( !provider )
  {
    return nullptr;
  }
  int band = mGrayBandComboBox->currentBand();

  QgsContrastEnhancement *e = new QgsContrastEnhancement( ( Qgis::DataType )(
        provider->dataType( band ) ) );
  e->setMinimumValue( mMinLineEdit->text().toDouble() );
  e->setMaximumValue( mMaxLineEdit->text().toDouble() );
  e->setContrastEnhancementAlgorithm( ( QgsContrastEnhancement::ContrastEnhancementAlgorithm )( mContrastEnhancementComboBox->currentData().toInt() ) );

  QgsSingleBandGrayRenderer *renderer = new QgsSingleBandGrayRenderer( provider, band );
  renderer->setContrastEnhancement( e );

  renderer->setGradient( ( QgsSingleBandGrayRenderer::Gradient ) mGradientComboBox->currentData().toInt() );
  renderer->setMinMaxOrigin( mMinMaxWidget->minMaxOrigin() );

  return renderer;
}

示例#3

QgsRasterRenderer* QgsSingleBandGrayRendererWidget::renderer()
{
  if ( !mRasterLayer )
  {
    return 0;
  }
  QgsRasterDataProvider* provider = mRasterLayer->dataProvider();
  if ( !provider )
  {
    return 0;
  }
  int band = mGrayBandComboBox->itemData( mGrayBandComboBox->currentIndex() ).toInt();

  QgsContrastEnhancement* e = new QgsContrastEnhancement(( QgsContrastEnhancement::QgsRasterDataType )(
        provider->dataType( band ) ) );
  e->setMinimumValue( mMinLineEdit->text().toDouble() );
  e->setMaximumValue( mMaxLineEdit->text().toDouble() );
  e->setContrastEnhancementAlgorithm(( QgsContrastEnhancement::ContrastEnhancementAlgorithm )( mContrastEnhancementComboBox->itemData(
                                       mContrastEnhancementComboBox->currentIndex() ).toInt() ) );


  QgsSingleBandGrayRenderer* renderer = new QgsSingleBandGrayRenderer( provider, band );
  renderer->setContrastEnhancement( e );
  return renderer;
}

示例#4

文件： qgssinglebandgrayrenderer.cpp 项目： dmarteau/QGIS

QgsSingleBandGrayRenderer *QgsSingleBandGrayRenderer::clone() const
{
  QgsSingleBandGrayRenderer *renderer = new QgsSingleBandGrayRenderer( nullptr, mGrayBand );
  renderer->copyCommonProperties( this );

  renderer->setGradient( mGradient );
  if ( mContrastEnhancement )
  {
    renderer->setContrastEnhancement( new QgsContrastEnhancement( *mContrastEnhancement ) );
  }
  return renderer;
}

示例#5

文件： qgssinglebandgrayrenderer.cpp 项目： nicanor-b/QGIS

QgsSingleBandGrayRenderer* QgsSingleBandGrayRenderer::clone() const
{
  QgsSingleBandGrayRenderer * renderer = new QgsSingleBandGrayRenderer( 0, mGrayBand );
  renderer->setOpacity( mOpacity );
  renderer->setAlphaBand( mAlphaBand );
  renderer->setRasterTransparency( mRasterTransparency ? new QgsRasterTransparency( *mRasterTransparency ) : 0 );
  renderer->setGradient( mGradient );
  if ( mContrastEnhancement )
  {
    renderer->setContrastEnhancement( new QgsContrastEnhancement( *mContrastEnhancement ) );
  }
  return renderer;
}