C++ (Cpp) QgsSymbolLayerV2::properties Examples

Example #1

File: qgslayerpropertieswidget.cpp Project: AaronGaim/QGIS

void QgsLayerPropertiesWidget::layerTypeChanged()
{
  QgsSymbolLayerV2* layer = mLayer;
  if ( !layer )
    return;
  QString newLayerType = cboLayerType->itemData( cboLayerType->currentIndex() ).toString();
  if ( layer->layerType() == newLayerType )
    return;

  // get creation function for new layer from registry
  QgsSymbolLayerV2Registry* pReg = QgsSymbolLayerV2Registry::instance();
  QgsSymbolLayerV2AbstractMetadata* am = pReg->symbolLayerMetadata( newLayerType );
  if ( am == NULL ) // check whether the metadata is assigned
    return;

  // change layer to a new (with different type)
  // base new layer on existing layer's properties
  QgsSymbolLayerV2* newLayer = am->createSymbolLayer( layer->properties() );
  if ( newLayer == NULL )
    return;

  updateSymbolLayerWidget( newLayer );
  emit changeLayer( newLayer );
}