C++ (Cpp) layerWasAdded示例

示例#1

文件： qgsmaplayerregistry.cpp 项目： CSRedRat/QGIS

//introduced in 1.8
QList<QgsMapLayer *> QgsMapLayerRegistry::addMapLayers(
  QList<QgsMapLayer *> theMapLayers,
  bool addToLegend,
  bool takeOwnership )
{
  QList<QgsMapLayer *> myResultList;
  for ( int i = 0; i < theMapLayers.size(); ++i )
  {
    QgsMapLayer * myLayer = theMapLayers.at( i );
    if ( !myLayer || !myLayer->isValid() )
    {
      QgsDebugMsg( "cannot add invalid layers" );
      continue;
    }
    //check the layer is not already registered!
    if ( !mMapLayers.contains( myLayer->id() ) )
    {
      mMapLayers[myLayer->id()] = myLayer;
      myResultList << mMapLayers[myLayer->id()];
      if ( takeOwnership )
        mOwnedLayers << myLayer;
      emit layerWasAdded( myLayer );
    }
  }
  if ( myResultList.count() > 0 )
  {
    emit layersAdded( myResultList );

    if ( addToLegend )
      emit legendLayersAdded( myResultList );
  }
  return myResultList;
} // QgsMapLayerRegistry::addMapLayers

示例#2

文件： qgsmaplayerregistry.cpp 项目： 3liz/Quantum-GIS

QList<QgsMapLayer *> QgsMapLayerRegistry::addMapLayers(
  const QList<QgsMapLayer *>& theMapLayers,
  bool addToLegend,
  bool takeOwnership )
{
  QList<QgsMapLayer *> myResultList;
  Q_FOREACH ( QgsMapLayer* myLayer, theMapLayers )
  {
    if ( !myLayer || !myLayer->isValid() )
    {
      QgsDebugMsg( "Cannot add invalid layers" );
      continue;
    }
    //check the layer is not already registered!
    if ( !mMapLayers.contains( myLayer->id() ) )
    {
      mMapLayers[myLayer->id()] = myLayer;
      myResultList << mMapLayers[myLayer->id()];
      if ( takeOwnership )
      {
        myLayer->setParent( this );
      }
      connect( myLayer, SIGNAL( destroyed( QObject* ) ), this, SLOT( onMapLayerDeleted( QObject* ) ) );
      emit layerWasAdded( myLayer );
    }
  }

示例#3

文件： qgsmaplayerstore.cpp 项目： ndavid/QGIS

QList<QgsMapLayer *> QgsMapLayerStore::addMapLayers( const QList<QgsMapLayer *> &layers, bool takeOwnership )
{
  QList<QgsMapLayer *> myResultList;
  Q_FOREACH ( QgsMapLayer *myLayer, layers )
  {
    if ( !myLayer || !myLayer->isValid() )
    {
      QgsDebugMsg( "Cannot add invalid layers" );
      continue;
    }
    //check the layer is not already registered!
    if ( !mMapLayers.contains( myLayer->id() ) )
    {
      mMapLayers[myLayer->id()] = myLayer;
      myResultList << mMapLayers[myLayer->id()];
      if ( takeOwnership )
      {
        myLayer->setParent( this );
      }
      connect( myLayer, &QObject::destroyed, this, &QgsMapLayerStore::onMapLayerDeleted );
      emit layerWasAdded( myLayer );
    }
  }
  if ( !myResultList.isEmpty() )
  {
    emit layersAdded( myResultList );
  }
  return myResultList;
}

示例#4

文件： qgsmaplayerregistry.cpp 项目： CzendaZdenda/qgis

QgsMapLayer *
QgsMapLayerRegistry::addMapLayer( QgsMapLayer * theMapLayer, bool theEmitSignal )
{
  if ( !theMapLayer || !theMapLayer->isValid() )
  {
    QgsDebugMsg( "cannot add invalid layers" );
    return 0;
  }

  //check the layer is not already registered!
  QMap<QString, QgsMapLayer*>::iterator myIterator = mMapLayers.find( theMapLayer->id() );
  //if myIterator returns mMapLayers.end() then it does not exist in registry and its safe to add it
  if ( myIterator == mMapLayers.end() )
  {
    mMapLayers[theMapLayer->id()] = theMapLayer;

    if ( theEmitSignal )
      emit layerWasAdded( theMapLayer );

    return mMapLayers[theMapLayer->id()];
  }
  else
  {
    return 0;
  }
} //  QgsMapLayerRegistry::addMapLayer

示例#5

文件： qgsmaplayerregistry.cpp 项目： Hardysong/Quantum-GIS

//introduced in 1.8
QList<QgsMapLayer *> QgsMapLayerRegistry::addMapLayers(
  QList<QgsMapLayer *> theMapLayers,
  bool addToLegend )
{
  QList<QgsMapLayer *> myResultList;
  for ( int i = 0; i < theMapLayers.size(); ++i )
  {
    QgsMapLayer * myLayer = theMapLayers.at( i );
    if ( !myLayer || !myLayer->isValid() )
    {
      QgsDebugMsg( "cannot add invalid layers" );
      continue;
    }
    //check the layer is not already registered!
    QMap<QString, QgsMapLayer*>::iterator myIterator =
      mMapLayers.find( myLayer->id() );
    //if myIterator returns mMapLayers.end() then it
    //does not exist in registry and its safe to add it
    if ( myIterator == mMapLayers.end() )
    {
      mMapLayers[myLayer->id()] = myLayer;
      myResultList << mMapLayers[myLayer->id()];
      emit layerWasAdded( myLayer );
    }
  }
  if ( myResultList.count() > 0 )
  {
    emit layersAdded( myResultList );

    if ( addToLegend )
      emit legendLayersAdded( myResultList );
  }
  return myResultList;
} // QgsMapLayerRegistry::addMapLayers