QgsRasterRenderer* QgsSingleBandPseudoColorRenderer::create( const QDomElement& elem, QgsRasterInterface* input )
{
if ( elem.isNull() )
{
return nullptr;
}
int band = elem.attribute( QStringLiteral( "band" ), QStringLiteral( "-1" ) ).toInt();
QgsRasterShader* shader = nullptr;
QDomElement rasterShaderElem = elem.firstChildElement( QStringLiteral( "rastershader" ) );
if ( !rasterShaderElem.isNull() )
{
shader = new QgsRasterShader();
shader->readXml( rasterShaderElem );
}
QgsSingleBandPseudoColorRenderer* r = new QgsSingleBandPseudoColorRenderer( input, band, shader );
r->readXml( elem );
// TODO: add _readXML in superclass?
r->setClassificationMin( elem.attribute( QStringLiteral( "classificationMin" ), QStringLiteral( "NaN" ) ).toDouble() );
r->setClassificationMax( elem.attribute( QStringLiteral( "classificationMax" ), QStringLiteral( "NaN" ) ).toDouble() );
r->setClassificationMinMaxOrigin( QgsRasterRenderer::minMaxOriginFromName( elem.attribute( QStringLiteral( "classificationMinMaxOrigin" ), QStringLiteral( "Unknown" ) ) ) );
return r;
}
QgsRasterRenderer* QgsSingleBandPseudoColorRendererWidget::renderer()
{
QgsRasterShader* rasterShader = new QgsRasterShader();
QgsColorRampShader* colorRampShader = new QgsColorRampShader();
colorRampShader->setClip( mClipCheckBox->isChecked() );
//iterate through mColormapTreeWidget and set colormap info of layer
QList<QgsColorRampShader::ColorRampItem> colorRampItems;
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem* currentItem;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
if ( !currentItem )
{
continue;
}
QgsColorRampShader::ColorRampItem newColorRampItem;
newColorRampItem.value = currentItem->text( 0 ).toDouble();
newColorRampItem.color = currentItem->background( 1 ).color();
newColorRampItem.label = currentItem->text( 2 );
colorRampItems.append( newColorRampItem );
}
// sort the shader items
qSort( colorRampItems );
colorRampShader->setColorRampItemList( colorRampItems );
if ( mColorInterpolationComboBox->currentText() == tr( "Linear" ) )
{
colorRampShader->setColorRampType( QgsColorRampShader::INTERPOLATED );
}
else if ( mColorInterpolationComboBox->currentText() == tr( "Discrete" ) )
{
colorRampShader->setColorRampType( QgsColorRampShader::DISCRETE );
}
else
{
colorRampShader->setColorRampType( QgsColorRampShader::EXACT );
}
rasterShader->setRasterShaderFunction( colorRampShader );
int bandNumber = mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt();
QgsSingleBandPseudoColorRenderer *renderer = new QgsSingleBandPseudoColorRenderer( mRasterLayer->dataProvider(), bandNumber, rasterShader );
renderer->setClassificationMin( lineEditValue( mMinLineEdit ) );
renderer->setClassificationMax( lineEditValue( mMaxLineEdit ) );
renderer->setClassificationMinMaxOrigin( mMinMaxOrigin );
return renderer;
}
