int QgsUniqueValueRenderer::readXML( const QDomNode& rnode, QgsVectorLayer& vl )
{
mGeometryType = vl.geometryType();
QDomNode classnode = rnode.namedItem( "classificationfield" );
QString classificationField = classnode.toElement().text();
QgsVectorDataProvider* theProvider = vl.dataProvider();
if ( !theProvider )
{
return 1;
}
int classificationId = vl.fieldNameIndex( classificationField );
if ( classificationId == -1 )
{
//go on. Because with joins, it might be the joined layer is not loaded yet
}
setClassificationField( classificationId );
QDomNode symbolnode = rnode.namedItem( "symbol" );
while ( !symbolnode.isNull() )
{
QgsSymbol* msy = new QgsSymbol( mGeometryType );
msy->readXML( symbolnode, &vl );
insertValue( msy->lowerValue(), msy );
symbolnode = symbolnode.nextSibling();
}
updateSymbolAttributes();
vl.setRenderer( this );
return 0;
}
int QgsContinuousColorRenderer::readXML( const QDomNode& rnode, QgsVectorLayer& vl )
{
mGeometryType = vl.geometryType();
QDomNode classnode = rnode.namedItem( "classificationfield" );
QString classificationField = classnode.toElement().text();
QgsVectorDataProvider* theProvider = vl.dataProvider();
if ( !theProvider )
{
return 1;
}
int classificationId = vl.fieldNameIndex( classificationField );
if ( classificationId == -1 )
{
//go on. Because with joins, it might be the joined layer is not loaded yet
}
setClassificationField( classificationId );
//polygon outline
QDomNode polyoutlinenode = rnode.namedItem( "polygonoutline" );
QString polyoutline = polyoutlinenode.toElement().text();
if ( polyoutline == "0" )
{
mDrawPolygonOutline = false;
}
else if ( polyoutline == "1" )
{
mDrawPolygonOutline = true;
}
//read the settings for the renderitem of the minimum value
QDomNode lowernode = rnode.namedItem( "lowestsymbol" );
QDomNode lsymbolnode = lowernode.namedItem( "symbol" );
if ( ! lsymbolnode.isNull() )
{
QgsSymbol* lsy = new QgsSymbol( mGeometryType );
lsy->readXML( lsymbolnode, &vl );
setMinimumSymbol( lsy );
}
QDomNode uppernode = rnode.namedItem( "highestsymbol" );
QDomNode usymbolnode = uppernode.namedItem( "symbol" );
if ( ! usymbolnode.isNull() )
{
QgsSymbol* usy = new QgsSymbol( mGeometryType );
usy->readXML( usymbolnode, &vl );
setMaximumSymbol( usy );
}
vl.setRenderer( this );
return 0;
}
int QgsGraduatedSymbolRenderer::readXML( const QDomNode& rnode, QgsVectorLayer& vl )
{
mGeometryType = vl.geometryType();
QDomNode modeNode = rnode.namedItem( "mode" );
QString modeValue = modeNode.toElement().text();
QDomNode classnode = rnode.namedItem( "classificationfield" );
QString classificationField = classnode.toElement().text();
QgsVectorDataProvider* theProvider = vl.dataProvider();
if ( !theProvider )
{
return 1;
}
if ( modeValue == "Empty" )
{
mMode = QgsGraduatedSymbolRenderer::Empty;
}
else if ( modeValue == "Quantile" )
{
mMode = QgsGraduatedSymbolRenderer::Quantile;
}
else //default
{
mMode = QgsGraduatedSymbolRenderer::EqualInterval;
}
int classificationId = theProvider->fieldNameIndex( classificationField );
if ( classificationId == -1 )
{
return 2; //@todo: handle gracefully in gui situation where user needs to nominate field
}
setClassificationField( classificationId );
QDomNode symbolnode = rnode.namedItem( "symbol" );
while ( !symbolnode.isNull() )
{
QgsSymbol* sy = new QgsSymbol( mGeometryType );
sy->readXML( symbolnode, &vl );
addSymbol( sy );
symbolnode = symbolnode.nextSibling();
}
updateSymbolAttributes();
vl.setRenderer( this );
return 0;
}
int QgsGraduatedSymbolRenderer::readXML( const QDomNode& rnode, QgsVectorLayer& vl )
{
mGeometryType = vl.geometryType();
QDomNode modeNode = rnode.namedItem( "mode" );
QString modeValue = modeNode.toElement().text();
QDomNode classnode = rnode.namedItem( "classificationfield" );
QString classificationField = classnode.toElement().text();
QgsVectorDataProvider* theProvider = vl.dataProvider();
if ( !theProvider )
{
return 1;
}
if ( modeValue == "Empty" )
{
mMode = QgsGraduatedSymbolRenderer::Empty;
}
else if ( modeValue == "Quantile" )
{
mMode = QgsGraduatedSymbolRenderer::Quantile;
}
else //default
{
mMode = QgsGraduatedSymbolRenderer::EqualInterval;
}
int classificationId = vl.fieldNameIndex( classificationField );
if ( classificationId == -1 )
{
//go on. Because with joins, it might be the joined layer is not loaded yet
}
setClassificationField( classificationId );
QDomNode symbolnode = rnode.namedItem( "symbol" );
while ( !symbolnode.isNull() )
{
QgsSymbol* sy = new QgsSymbol( mGeometryType );
sy->readXML( symbolnode, &vl );
addSymbol( sy );
symbolnode = symbolnode.nextSibling();
}
updateSymbolAttributes();
vl.setRenderer( this );
return 0;
}
int main(int argc, char ** argv)
{
// Start the Application
QgsApplication app(argc, argv, true);
QString myPluginsDir = "/home/timlinux/apps/lib/qgis";
QString myLayerPath = "/home/timlinux/gisdata/brazil/BR_Cidades/";
QString myLayerBaseName = "Brasil_Cap";
QString myProviderName = "ogr";
// Instantiate Provider Registry
QgsProviderRegistry::instance(myPluginsDir);
// create a maplayer instance
QgsVectorLayer * mypLayer =
new QgsVectorLayer(myLayerPath, myLayerBaseName, myProviderName);
QgsSingleSymbolRenderer *mypRenderer = new QgsSingleSymbolRenderer(mypLayer->geometryType());
QList <QgsMapCanvasLayer> myLayerSet;
mypLayer->setRenderer(mypRenderer);
if (mypLayer->isValid())
{
qDebug("Layer is valid");
}
else
{
qDebug("Layer is NOT valid");
}
// Add the Vector Layer to the Layer Registry
QgsMapLayerRegistry::instance()->addMapLayer(mypLayer, TRUE);
// Add the Layer to the Layer Set
myLayerSet.append(QgsMapCanvasLayer(mypLayer, TRUE));
// Create the Map Canvas
QgsMapCanvas * mypMapCanvas = new QgsMapCanvas(0, 0);
mypMapCanvas->setExtent(mypLayer->extent());
mypMapCanvas->enableAntiAliasing(true);
mypMapCanvas->setCanvasColor(QColor(255, 255, 255));
mypMapCanvas->freeze(false);
// Set the Map Canvas Layer Set
mypMapCanvas->setLayerSet(myLayerSet);
mypMapCanvas->setVisible(true);
mypMapCanvas->refresh();
// Start the Application Event Loop
return app.exec();
}
int QgsSingleSymbolRenderer::readXML( const QDomNode& rnode, QgsVectorLayer& vl )
{
mGeometryType = vl.geometryType();
QgsSymbol* sy = new QgsSymbol( mGeometryType );
QDomNode synode = rnode.namedItem( "symbol" );
if ( synode.isNull() )
{
QgsDebugMsg( "No symbol node in project file's renderitem Dom" );
// XXX abort?
}
else
{
sy->readXML( synode, &vl );
}
updateSymbolAttributes();
//create a renderer and add it to the vector layer
addSymbol( sy );
vl.setRenderer( this );
return 0;
}
void MainWindow::addLayer()
{
QString myLayerPath = "../data";
QString myLayerBaseName = "test";
QString myProviderName = "ogr";
QgsVectorLayer * mypLayer = new QgsVectorLayer(myLayerPath, myLayerBaseName, myProviderName);
if (mypLayer->isValid())
{
qDebug("Layer is valid");
}
else
{
qDebug("Layer is NOT valid");
return;
}
//set up a renderer for the layer
QgsSingleSymbolRenderer *mypRenderer = new QgsSingleSymbolRenderer(mypLayer->geometryType());
QList<QgsMapCanvasLayer> myLayerSet;
mypLayer->setRenderer(mypRenderer);
//
//set up labelling for the layer
//
//get the label instance associated with the layer
QgsLabel * mypLabel;
mypLabel = mypLayer->label();
//and the label attributes associated with the label
QgsLabelAttributes * mypLabelAttributes;
mypLabelAttributes = mypLabel->layerAttributes();
//note in QGIS 1.4 and up you should use mypLabel->labelAttributes rather
//get the field list associated with the layer
//we'll print the names out to console for diagnostic purposes
QgsFieldMap myFields = mypLayer->dataProvider()->fields();
for (unsigned int i = 0; i < myFields.size(); i++ )
{
qDebug("Field Name: " + QString(myFields[i].name()).toLocal8Bit() );
}
//just use the last field's name in the fields list as the label field!
qDebug("set label field to " + QString(myFields[myFields.size()-1].name()).toLocal8Bit());
mypLabel->setLabelField( QgsLabel::Text, myFields.size()-1);
//set the colour of the label text
mypLabelAttributes->setColor(Qt::black);
//create a 'halo' effect around each label so it
//can still be read on dark backgrounds
mypLabelAttributes->setBufferEnabled(true);
mypLabelAttributes->setBufferColor(Qt::yellow);
int myType = QgsLabelAttributes::PointUnits;
mypLabelAttributes->setBufferSize(1,myType);
/*
* Here are a bunch of other things you can set based on values on a database field
* the second parameter in each case would be the field name from which the
* attribute can be retrieved.
mypLabel->setLabelField( QgsLabel::Family, "fontFamily" );
mypLabel->setLabelField( QgsLabel::Bold, "fontIsBold" );
mypLabel->setLabelField( QgsLabel::Italic, "fontIsItalic" );
mypLabel->setLabelField( QgsLabel::Underline, "fontIsUnderlined" );
mypLabel->setLabelField( QgsLabel::Size, "fontSize" );
mypLabel->setLabelField( QgsLabel::BufferSize,"fontBufferSize" );
mypLabel->setLabelField( QgsLabel::XCoordinate, "labelX" );
mypLabel->setLabelField( QgsLabel::YCoordinate, "labelY");
mypLabel->setLabelField( QgsLabel::XOffset, "labelXOffset");
mypLabel->setLabelField( QgsLabel::YOffset, "labelYOffset");
mypLabel->setLabelField( QgsLabel::Alignment, "labelAlignment" );
mypLabel->setLabelField( QgsLabel::Angle, "labelAngle");
*/
//lastly we enable labelling!
mypLayer->enableLabels(true);
// Add the Vector Layer to the Layer Registry
QgsMapLayerRegistry::instance()->addMapLayer(mypLayer, TRUE);
// Add the Layer to the Layer Set
myLayerSet.append(QgsMapCanvasLayer( mypLayer ) );
// set teh canvas to the extent of our layer
mpMapCanvas->setExtent(mypLayer->extent());
// Set the Map Canvas Layer Set
mpMapCanvas->setLayerSet(myLayerSet);
}
void QgsDwgImportDialog::createGroup( QgsLayerTreeGroup *group, const QString &name, const QStringList &layers, bool visible )
{
QgsLayerTreeGroup *layerGroup = group->addGroup( name );
QgsDebugMsg( QStringLiteral( " %1" ).arg( name ) ) ;
Q_ASSERT( layerGroup );
QString layerFilter;
if ( !layers.isEmpty() )
{
QStringList exprlist;
const auto constLayers = layers;
for ( QString layer : constLayers )
{
exprlist.append( QStringLiteral( "'%1'" ).arg( layer.replace( QLatin1String( "'" ), QLatin1String( "''" ) ) ) );
}
layerFilter = QStringLiteral( "layer IN (%1) AND " ).arg( exprlist.join( QStringLiteral( "," ) ) );
}
QgsVectorLayer *l = nullptr;
QgsSymbol *sym = nullptr;
l = layer( layerGroup, layerFilter, QStringLiteral( "hatches" ) );
if ( l )
{
QgsSimpleFillSymbolLayer *sfl = new QgsSimpleFillSymbolLayer();
sfl->setDataDefinedProperty( QgsSymbolLayer::PropertyFillColor, QgsProperty::fromField( QStringLiteral( "color" ) ) );
sfl->setStrokeStyle( Qt::NoPen );
sym = new QgsFillSymbol();
sym->changeSymbolLayer( 0, sfl );
l->setRenderer( new QgsSingleSymbolRenderer( sym ) );
}
l = layer( layerGroup, layerFilter, QStringLiteral( "lines" ) );
if ( l )
{
QgsSimpleLineSymbolLayer *sll = new QgsSimpleLineSymbolLayer();
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeColor, QgsProperty::fromField( QStringLiteral( "color" ) ) );
sll->setPenJoinStyle( Qt::MiterJoin );
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeWidth, QgsProperty::fromField( QStringLiteral( "linewidth" ) ) );
// sll->setUseCustomDashPattern( true );
// sll->setCustomDashPatternUnit( QgsSymbolV2::MapUnit );
// sll->setDataDefinedProperty( QgsSymbolLayer::PropertyCustomDash, QgsProperty::fromField( "linetype" ) );
sym = new QgsLineSymbol();
sym->changeSymbolLayer( 0, sll );
sym->setOutputUnit( QgsUnitTypes::RenderMillimeters );
l->setRenderer( new QgsSingleSymbolRenderer( sym ) );
}
l = layer( layerGroup, layerFilter, QStringLiteral( "polylines" ) );
if ( l )
{
sym = new QgsLineSymbol();
QgsSimpleLineSymbolLayer *sll = new QgsSimpleLineSymbolLayer();
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeColor, QgsProperty::fromField( QStringLiteral( "color" ) ) );
sll->setPenJoinStyle( Qt::MiterJoin );
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeWidth, QgsProperty::fromField( QStringLiteral( "width" ) ) );
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyLayerEnabled, QgsProperty::fromExpression( QStringLiteral( "width>0" ) ) );
sll->setOutputUnit( QgsUnitTypes::RenderMapUnits );
// sll->setUseCustomDashPattern( true );
// sll->setCustomDashPatternUnit( QgsSymbolV2::MapUnit );
// sll->setDataDefinedProperty( QgsSymbolLayer::PropertyCustomDash, QgsProperty::fromField( "linetype" ) );
sym->changeSymbolLayer( 0, sll );
sll = new QgsSimpleLineSymbolLayer();
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeColor, QgsProperty::fromField( QStringLiteral( "color" ) ) );
sll->setPenJoinStyle( Qt::MiterJoin );
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyStrokeWidth, QgsProperty::fromField( QStringLiteral( "linewidth" ) ) );
sll->setDataDefinedProperty( QgsSymbolLayer::PropertyLayerEnabled, QgsProperty::fromExpression( QStringLiteral( "width=0" ) ) );
sll->setOutputUnit( QgsUnitTypes::RenderMillimeters );
sym->appendSymbolLayer( sll );
l->setRenderer( new QgsSingleSymbolRenderer( sym ) );
}
l = layer( layerGroup, layerFilter, QStringLiteral( "texts" ) );
if ( l )
{
l->setRenderer( new QgsNullSymbolRenderer() );
QgsTextFormat tf;
tf.setSizeUnit( QgsUnitTypes::RenderMapUnits );
QgsPalLayerSettings pls;
pls.setFormat( tf );
pls.drawLabels = true;
pls.fieldName = QStringLiteral( "text" );
pls.wrapChar = QStringLiteral( "\\P" );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::Size, QgsProperty::fromField( QStringLiteral( "height" ) ) );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::Color, QgsProperty::fromField( QStringLiteral( "color" ) ) );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::MultiLineHeight, QgsProperty::fromExpression( QStringLiteral( "CASE WHEN interlin<0 THEN 1 ELSE interlin*1.5 END" ) ) );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::PositionX, QgsProperty::fromExpression( QStringLiteral( "$x" ) ) );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::PositionY, QgsProperty::fromExpression( QStringLiteral( "$y" ) ) );
// DXF TEXT
// vertical: 0 = Base, 1 = Bottom, 2 = Middle, 3 = Top, default Base
// horizontal: 0 = Left, 1 = Center, 2 = Right, 3 = Aligned (if Base), 4 = Middle (if Base), default Left
// DXF MTEXT
// 1 = Top left; 2 = Top center; 3 = Top right
// 4 = Middle left; 5 = Middle center; 6 = Middle right
// 7 = Bottom left; 8 = Bottom center; 9 = Bottom right
// QGIS Quadrant
// 0 QuadrantAboveLeft, 1 QuadrantAbove, 2 QuadrantAboveRight,
// 3 QuadrantLeft, 4 QuadrantOver, 5 QuadrantRight,
// 6 QuadrantBelowLeft, 7 QuadrantBelow, 8 QuadrantBelowRight,
pls.dataDefinedProperties().setProperty(
QgsPalLayerSettings::Hali,
QgsProperty::fromExpression( QStringLiteral(
"CASE"
" WHEN etype=%1 THEN"
" CASE"
" WHEN textgen % 3=2 THEN 'Center'"
" WHEN textgen % 3=0 THEN 'Right'"
" ELSE 'Left'"
" END"
" ELSE"
" CASE"
" WHEN alignh=1 THEN 'Center'"
" WHEN alignh=2 THEN 'Right'"
" ELSE 'Left'"
" END"
" END"
).arg( DRW::MTEXT )
)
);
pls.dataDefinedProperties().setProperty(
QgsPalLayerSettings::Vali,
QgsProperty::fromExpression( QStringLiteral(
"CASE"
" WHEN etype=%1 THEN"
" CASE"
" WHEN textgen<4 THEN 'Top'"
" WHEN textgen<7 THEN 'Half'"
" ELSE 'Bottom'"
" END"
" ELSE"
" CASE"
" WHEN alignv=1 THEN 'Bottom'"
" WHEN alignv=2 THEN 'Half'"
" WHEN alignv=3 THEN 'Top'"
" ELSE 'Base'"
" END"
" END"
).arg( DRW::MTEXT )
)
);
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::LabelRotation, QgsProperty::fromExpression( QStringLiteral( "360-angle" ) ) );
pls.dataDefinedProperties().setProperty( QgsPalLayerSettings::AlwaysShow, QgsProperty::fromExpression( QStringLiteral( "1" ) ) );
l->setLabeling( new QgsVectorLayerSimpleLabeling( pls ) );
l->setLabelsEnabled( true );
}
l = layer( layerGroup, layerFilter, QStringLiteral( "points" ) );
if ( l )
{
// FIXME: use PDMODE?
l->setRenderer( new QgsNullSymbolRenderer() );
}
if ( !cbExpandInserts->isChecked() )
layer( layerGroup, layerFilter, QStringLiteral( "inserts" ) );
if ( !layerGroup->children().isEmpty() )
{
layerGroup->setExpanded( false );
layerGroup->setItemVisibilityChecked( visible );
}
else
{
layerGroup->parent()->takeChild( layerGroup );
delete layerGroup;
}
}
QgsVectorLayer* QgsSLDConfigParser::contourLayerFromRaster( const QDomElement& userStyleElem, QgsRasterLayer* rasterLayer ) const
{
QgsDebugMsg( "Entering." );
if ( !rasterLayer )
{
return nullptr;
}
//get <ContourSymbolizer> element
QDomNodeList contourNodeList = userStyleElem.elementsByTagName( QStringLiteral( "ContourSymbolizer" ) );
if ( contourNodeList.size() < 1 )
{
return nullptr;
}
QDomElement contourSymbolizerElem = contourNodeList.item( 0 ).toElement();
if ( contourSymbolizerElem.isNull() )
{
return nullptr;
}
double equidistance, minValue, maxValue, offset;
QString propertyName;
equidistance = contourSymbolizerElem.attribute( QStringLiteral( "equidistance" ) ).toDouble();
minValue = contourSymbolizerElem.attribute( QStringLiteral( "minValue" ) ).toDouble();
maxValue = contourSymbolizerElem.attribute( QStringLiteral( "maxValue" ) ).toDouble();
offset = contourSymbolizerElem.attribute( QStringLiteral( "offset" ) ).toDouble();
propertyName = contourSymbolizerElem.attribute( QStringLiteral( "propertyName" ) );
if ( equidistance <= 0.0 )
{
return nullptr;
}
QTemporaryFile* tmpFile1 = new QTemporaryFile();
tmpFile1->open();
mFilesToRemove.push_back( tmpFile1 );
QString tmpBaseName = tmpFile1->fileName();
QString tmpFileName = tmpBaseName + ".shp";
//hack: use gdal_contour first to write into a temporary file
/* todo: use GDALContourGenerate( hBand, dfInterval, dfOffset,
nFixedLevelCount, adfFixedLevels,
bNoDataSet, dfNoData,
hLayer, 0, nElevField,
GDALTermProgress, nullptr );*/
//do the stuff that is also done in the main method of gdal_contour...
/* -------------------------------------------------------------------- */
/* Open source raster file. */
/* -------------------------------------------------------------------- */
GDALRasterBandH hBand;
GDALDatasetH hSrcDS;
int numberOfLevels = 0;
double currentLevel = 0.0;
if ( maxValue > minValue )
{
//find first level
currentLevel = ( int )(( minValue - offset ) / equidistance + 0.5 ) * equidistance + offset;
while ( currentLevel <= maxValue )
{
++numberOfLevels;
currentLevel += equidistance;
}
}
double *adfFixedLevels = new double[numberOfLevels];
int nFixedLevelCount = numberOfLevels;
currentLevel = ( int )(( minValue - offset ) / equidistance + 0.5 ) * equidistance + offset;
for ( int i = 0; i < numberOfLevels; ++i )
{
adfFixedLevels[i] = currentLevel;
currentLevel += equidistance;
}
int nBandIn = 1;
double dfInterval = equidistance, dfNoData = 0.0, dfOffset = offset;
int /* b3D = FALSE, */ bNoDataSet = FALSE, bIgnoreNoData = FALSE;
hSrcDS = GDALOpen( rasterLayer->source().toUtf8().constData(), GA_ReadOnly );
if ( !hSrcDS )
{
delete [] adfFixedLevels;
throw QgsMapServiceException( QStringLiteral( "LayerNotDefined" ), QStringLiteral( "Operation request is for a file not available on the server." ) );
}
hBand = GDALGetRasterBand( hSrcDS, nBandIn );
if ( !hBand )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Band %d does not exist on dataset.",
nBandIn );
}
if ( !bNoDataSet && !bIgnoreNoData )
dfNoData = GDALGetRasterNoDataValue( hBand, &bNoDataSet );
/* -------------------------------------------------------------------- */
/* Try to get a coordinate system from the raster. */
/* -------------------------------------------------------------------- */
OGRSpatialReferenceH hSRS = nullptr;
const char *pszWKT = GDALGetProjectionRef( hBand );
if ( pszWKT && strlen( pszWKT ) != 0 )
hSRS = OSRNewSpatialReference( pszWKT );
/* -------------------------------------------------------------------- */
/* Create the outputfile. */
/* -------------------------------------------------------------------- */
OGRDataSourceH hDS;
OGRSFDriverH hDriver = OGRGetDriverByName( "ESRI Shapefile" );
OGRFieldDefnH hFld;
OGRLayerH hLayer;
int nElevField = -1;
if ( !hDriver )
{
//fprintf( FCGI_stderr, "Unable to find format driver named 'ESRI Shapefile'.\n" );
delete [] adfFixedLevels;
throw QgsMapServiceException( QStringLiteral( "LayerNotDefined" ), QStringLiteral( "Operation request is for a file not available on the server." ) );
}
hDS = OGR_Dr_CreateDataSource( hDriver, tmpFileName.toUtf8().constData(), nullptr );
if ( !hDS )
{
delete [] adfFixedLevels;
throw QgsMapServiceException( QStringLiteral( "LayerNotDefined" ), QStringLiteral( "Operation request cannot create data source." ) );
}
hLayer = OGR_DS_CreateLayer( hDS, "contour", hSRS,
/* b3D ? wkbLineString25D : */ wkbLineString,
nullptr );
if ( !hLayer )
{
delete [] adfFixedLevels;
throw QgsMapServiceException( QStringLiteral( "LayerNotDefined" ), QStringLiteral( "Operation request could not create contour file." ) );
}
hFld = OGR_Fld_Create( "ID", OFTInteger );
OGR_Fld_SetWidth( hFld, 8 );
OGR_L_CreateField( hLayer, hFld, FALSE );
OGR_Fld_Destroy( hFld );
if ( !propertyName.isEmpty() )
{
hFld = OGR_Fld_Create( propertyName.toUtf8().constData(), OFTReal );
OGR_Fld_SetWidth( hFld, 12 );
OGR_Fld_SetPrecision( hFld, 3 );
OGR_L_CreateField( hLayer, hFld, FALSE );
OGR_Fld_Destroy( hFld );
nElevField = 1;
}
/* -------------------------------------------------------------------- */
/* Invoke. */
/* -------------------------------------------------------------------- */
GDALContourGenerate( hBand, dfInterval, dfOffset,
nFixedLevelCount, adfFixedLevels,
bNoDataSet, dfNoData,
hLayer, 0, nElevField,
GDALTermProgress, nullptr );
delete [] adfFixedLevels;
OGR_DS_Destroy( hDS );
GDALClose( hSrcDS );
//todo: store those three files elsewhere...
//mark shp, dbf and shx to delete after the request
mFilePathsToRemove.push_back( tmpBaseName + ".shp" );
mFilePathsToRemove.push_back( tmpBaseName + ".dbf" );
mFilePathsToRemove.push_back( tmpBaseName + ".shx" );
QgsVectorLayer* contourLayer = new QgsVectorLayer( tmpFileName, QStringLiteral( "layer" ), QStringLiteral( "ogr" ) );
//create renderer
QgsFeatureRenderer* theRenderer = rendererFromUserStyle( userStyleElem, contourLayer );
contourLayer->setRenderer( theRenderer );
//add labeling if requested
labelSettingsFromUserStyle( userStyleElem, contourLayer );
QgsDebugMsg( "Returning the contour layer" );
return contourLayer;
}
QList<QgsMapLayer*> QgsSLDConfigParser::mapLayerFromStyle( const QString& lName, const QString& styleName, bool useCache ) const
{
QList<QgsMapLayer*> fallbackLayerList;
QList<QgsMapLayer*> resultList;
//first check if this layer is a named layer with a user style
QList<QDomElement> namedLayerElemList = findNamedLayerElements( lName );
for ( int i = 0; i < namedLayerElemList.size(); ++i )
{
QDomElement userStyleElement = findUserStyleElement( namedLayerElemList[i], styleName );
if ( !userStyleElement.isNull() )
{
fallbackLayerList = mFallbackParser->mapLayerFromStyle( lName, QLatin1String( "" ), false );
if ( !fallbackLayerList.isEmpty() )
{
QgsVectorLayer* v = dynamic_cast<QgsVectorLayer*>( fallbackLayerList.at( 0 ) );
if ( v )
{
QgsFeatureRenderer* r = rendererFromUserStyle( userStyleElement, v );
v->setRenderer( r );
labelSettingsFromUserStyle( userStyleElement, v );
resultList.push_back( v );
return resultList;
}
else
{
QgsRasterLayer* r = dynamic_cast<QgsRasterLayer*>( fallbackLayerList.at( 0 ) ); //a raster layer?
if ( r )
{
rasterSymbologyFromUserStyle( userStyleElement, r );
//Using a contour symbolizer, there may be a raster and a vector layer
QgsVectorLayer* v = contourLayerFromRaster( userStyleElement, r );
if ( v )
{
resultList.push_back( v ); //contour layer must be added before raster
mLayersToRemove.push_back( v ); //don't cache contour layers at the moment
}
resultList.push_back( r );
return resultList;
}
}
}
}
// try with a predefined named style
QDomElement namedStyleElement = findNamedStyleElement( namedLayerElemList[i], styleName );
if ( !namedStyleElement.isNull() )
{
fallbackLayerList = mFallbackParser->mapLayerFromStyle( lName, styleName, false );
if ( !fallbackLayerList.isEmpty() )
{
resultList << fallbackLayerList;
return resultList;
}
}
}
QDomElement userLayerElement = findUserLayerElement( lName );
if ( userLayerElement.isNull() )
{
//maybe named layer and named style is defined in the fallback SLD?
if ( mFallbackParser )
{
resultList = mFallbackParser->mapLayerFromStyle( lName, styleName, useCache );
}
return resultList;
}
QDomElement userStyleElement = findUserStyleElement( userLayerElement, styleName );
QgsMapLayer* theMapLayer = mapLayerFromUserLayer( userLayerElement, lName, useCache );
if ( !theMapLayer )
{
return resultList;
}
QgsFeatureRenderer* theRenderer = nullptr;
QgsRasterLayer* theRasterLayer = dynamic_cast<QgsRasterLayer*>( theMapLayer );
if ( theRasterLayer )
{
QgsDebugMsg( "Layer is a rasterLayer" );
if ( !userStyleElement.isNull() )
{
QgsDebugMsg( "Trying to add raster symbology" );
rasterSymbologyFromUserStyle( userStyleElement, theRasterLayer );
//todo: possibility to have vector layer or raster layer
QgsDebugMsg( "Trying to find contour symbolizer" );
QgsVectorLayer* v = contourLayerFromRaster( userStyleElement, theRasterLayer );
if ( v )
{
QgsDebugMsg( "Returning vector layer" );
resultList.push_back( v );
mLayersToRemove.push_back( v );
}
}
resultList.push_back( theMapLayer );
return resultList;
}
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>( theMapLayer );
if ( userStyleElement.isNull() )//apply a default style
{
QgsSymbol* symbol = QgsSymbol::defaultSymbol( theVectorLayer->geometryType() );
theRenderer = new QgsSingleSymbolRenderer( symbol );
}
else
{
QgsDebugMsg( "Trying to get a renderer from the user style" );
theRenderer = rendererFromUserStyle( userStyleElement, theVectorLayer );
//apply labels if <TextSymbolizer> tag is present
labelSettingsFromUserStyle( userStyleElement, theVectorLayer );
}
if ( !theRenderer )
{
QgsDebugMsg( "Error, could not create a renderer" );
delete theVectorLayer;
return resultList;
}
theVectorLayer->setRenderer( theRenderer );
QgsDebugMsg( "Returning the vectorlayer" );
resultList.push_back( theVectorLayer );
return resultList;
}
