Ejemplos de readSymbology en C++ (Cpp)

Ejemplo n.º 1

Archivo: qgsmeshlayer.cpp Proyecto: anitagraser/QGIS

bool QgsMeshLayer::readXml( const QDomNode &layer_node, QgsReadWriteContext &context )
{
  QgsDebugMsgLevel( QStringLiteral( "Datasource in QgsMeshLayer::readXml: %1" ).arg( mDataSource.toLocal8Bit().data() ), 3 );

  //process provider key
  QDomNode pkeyNode = layer_node.namedItem( QStringLiteral( "provider" ) );

  if ( pkeyNode.isNull() )
  {
    mProviderKey.clear();
  }
  else
  {
    QDomElement pkeyElt = pkeyNode.toElement();
    mProviderKey = pkeyElt.text();
  }

  QgsDataProvider::ProviderOptions providerOptions;
  if ( !setDataProvider( mProviderKey, providerOptions ) )
  {
    return false;
  }

  QDomElement elemExtraDatasets = layer_node.firstChildElement( QStringLiteral( "extra-datasets" ) );
  if ( !elemExtraDatasets.isNull() )
  {
    QDomElement elemUri = elemExtraDatasets.firstChildElement( QStringLiteral( "uri" ) );
    while ( !elemUri.isNull() )
    {
      QString uri = context.pathResolver().readPath( elemUri.text() );

      bool res = mDataProvider->addDataset( uri );
#ifdef QGISDEBUG
      QgsDebugMsg( QStringLiteral( "extra dataset (res %1): %2" ).arg( res ).arg( uri ) );
#else
      ( void )res; // avoid unused warning in release builds
#endif

      elemUri = elemUri.nextSiblingElement( QStringLiteral( "uri" ) );
    }
  }

  QString errorMsg;
  readSymbology( layer_node, errorMsg, context );

  return mValid; // should be true if read successfully
}

Ejemplo n.º 2

Archivo: qgsmaplayer.cpp Proyecto: FlavioFalcao/QGIS

QString QgsMapLayer::loadNamedStyle( const QString &theURI, bool &theResultFlag )
{
  QgsDebugMsg( QString( "uri = %1 myURI = %2" ).arg( theURI ).arg( publicSource() ) );

  theResultFlag = false;

  QDomDocument myDocument( "qgis" );

  // location of problem associated with errorMsg
  int line, column;
  QString myErrorMessage;

  QFile myFile( theURI );
  if ( myFile.open( QFile::ReadOnly ) )
  {
    // read file
    theResultFlag = myDocument.setContent( &myFile, &myErrorMessage, &line, &column );
    if ( !theResultFlag )
      myErrorMessage = tr( "%1 at line %2 column %3" ).arg( myErrorMessage ).arg( line ).arg( column );
    myFile.close();
  }
  else
  {
    QFileInfo project( QgsProject::instance()->fileName() );
    QgsDebugMsg( QString( "project fileName: %1" ).arg( project.absoluteFilePath() ) );

    QString qml;
    if ( loadNamedStyleFromDb( QDir( QgsApplication::qgisSettingsDirPath() ).absoluteFilePath( "qgis.qmldb" ), theURI, qml ) ||
         ( project.exists() && loadNamedStyleFromDb( project.absoluteDir().absoluteFilePath( project.baseName() + ".qmldb" ), theURI, qml ) ) ||
         loadNamedStyleFromDb( QDir( QgsApplication::pkgDataPath() ).absoluteFilePath( "resources/qgis.qmldb" ), theURI, qml ) )
    {
      theResultFlag = myDocument.setContent( qml, &myErrorMessage, &line, &column );
      if ( !theResultFlag )
      {
        myErrorMessage = tr( "%1 at line %2 column %3" ).arg( myErrorMessage ).arg( line ).arg( column );
      }
    }
    else
    {
      myErrorMessage = tr( "style not found in database" );
    }
  }

  if ( !theResultFlag )
  {
    return myErrorMessage;
  }

  // get style file version string, if any
  QgsProjectVersion fileVersion( myDocument.firstChildElement( "qgis" ).attribute( "version" ) );
  QgsProjectVersion thisVersion( QGis::QGIS_VERSION );

  if ( thisVersion > fileVersion )
  {
    QgsLogger::warning( "Loading a style file that was saved with an older "
                        "version of qgis (saved in " + fileVersion.text() +
                        ", loaded in " + QGis::QGIS_VERSION +
                        "). Problems may occur." );

    QgsProjectFileTransform styleFile( myDocument, fileVersion );
    // styleFile.dump();
    styleFile.updateRevision( thisVersion );
    // styleFile.dump();
  }

  // now get the layer node out and pass it over to the layer
  // to deserialise...
  QDomElement myRoot = myDocument.firstChildElement( "qgis" );
  if ( myRoot.isNull() )
  {
    myErrorMessage = tr( "Error: qgis element could not be found in %1" ).arg( theURI );
    theResultFlag = false;
    return myErrorMessage;
  }

  // use scale dependent visibility flag
  toggleScaleBasedVisibility( myRoot.attribute( "hasScaleBasedVisibilityFlag" ).toInt() == 1 );
  setMinimumScale( myRoot.attribute( "minimumScale" ).toFloat() );
  setMaximumScale( myRoot.attribute( "maximumScale" ).toFloat() );

#if 0
  //read transparency level
  QDomNode transparencyNode = myRoot.namedItem( "transparencyLevelInt" );
  if ( ! transparencyNode.isNull() )
  {
    // set transparency level only if it's in project
    // (otherwise it sets the layer transparent)
    QDomElement myElement = transparencyNode.toElement();
    setTransparency( myElement.text().toInt() );
  }
#endif

  QString errorMsg;
  theResultFlag = readSymbology( myRoot, errorMsg );
  if ( !theResultFlag )
  {
    myErrorMessage = tr( "Loading style file %1 failed because:\n%2" ).arg( theURI ).arg( errorMsg );
    return myErrorMessage;
  }

  return "";
}