C++ (Cpp) ImageLayerVector::swap Examples

Example #1

File: Map.cpp Project: Geo12/osgearth

void
Map::clear()
{
    ImageLayerVector     imageLayersRemoved;
    ElevationLayerVector elevLayersRemoved;
    ModelLayerVector     modelLayersRemoved;
    MaskLayerVector      maskLayersRemoved;

    Revision newRevision;
    {
        Threading::ScopedWriteLock lock( _mapDataMutex );

        imageLayersRemoved.swap( _imageLayers );
        elevLayersRemoved.swap ( _elevationLayers );
        modelLayersRemoved.swap( _modelLayers );

        // calculate a new revision.
        newRevision = ++_dataModelRevision;
    }
    
    // a separate block b/c we don't need the mutex   
    for( MapCallbackList::iterator i = _mapCallbacks.begin(); i != _mapCallbacks.end(); i++ )
    {
        for( ImageLayerVector::iterator k = imageLayersRemoved.begin(); k != imageLayersRemoved.end(); ++k )
            i->get()->onMapModelChanged( MapModelChange(MapModelChange::REMOVE_IMAGE_LAYER, newRevision, k->get()) );
        for( ElevationLayerVector::iterator k = elevLayersRemoved.begin(); k != elevLayersRemoved.end(); ++k )
            i->get()->onMapModelChanged( MapModelChange(MapModelChange::REMOVE_ELEVATION_LAYER, newRevision, k->get()) );
        for( ModelLayerVector::iterator k = modelLayersRemoved.begin(); k != modelLayersRemoved.end(); ++k )
            i->get()->onMapModelChanged( MapModelChange(MapModelChange::REMOVE_MODEL_LAYER, newRevision, k->get()) );
    }
}