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 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 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;
}
Ejemplo n.º 5
0
void QgsComposerSymbolItem::readXML( const QDomElement& itemElem )
{
  if ( itemElem.isNull() )
  {
    return;
  }
  setText( itemElem.attribute( "text", "" ) );
  setLayerID( itemElem.attribute( "layerId", "" ) );

  QgsVectorLayer* vLayer = qobject_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( mLayerID ) );
  if ( vLayer )
  {
    QDomElement symbolElem = itemElem.firstChildElement( "symbol" );
    if ( !symbolElem.isNull() )
    {
      QgsSymbol* symbol = new QgsSymbol( vLayer->geometryType() );
      symbol->readXML( symbolElem, vLayer );
      setSymbol( symbol );

      //add icon
      switch ( symbol->type() )
      {
        case QGis::Point:
          setIcon( QIcon( QPixmap::fromImage( symbol->getPointSymbolAsImage() ) ) );
          break;
        case QGis::Line:
          setIcon( QIcon( QPixmap::fromImage( symbol->getLineSymbolAsImage() ) ) );
          break;
        case QGis::Polygon:
          setIcon( QIcon( QPixmap::fromImage( symbol->getPolygonSymbolAsImage() ) ) );
          break;
        case QGis::NoGeometry:
          setIcon( QIcon( QgsApplication::activeThemePath() + "/mIconTableLayer.png" ) );
          break;
        case QGis::UnknownGeometry:
          // should not occur
          break;
      }
    }
  }
}
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;
}