QgsLayerTreeLayer *QgsLayerTreeUtils::insertLayerBelow( QgsLayerTreeGroup *group, const QgsMapLayer *refLayer, QgsMapLayer *layerToInsert )
{
// get the index of the reflayer
QgsLayerTreeLayer *inTree = group->findLayer( refLayer->id() );
if ( !inTree )
return nullptr;
int idx = 0;
const auto constChildren = inTree->parent()->children();
for ( QgsLayerTreeNode *vl : constChildren )
{
if ( vl->nodeType() == QgsLayerTreeNode::NodeLayer && static_cast<QgsLayerTreeLayer *>( vl )->layer() == refLayer )
{
break;
}
idx++;
}
// insert the new layer
QgsLayerTreeGroup *parent = static_cast<QgsLayerTreeGroup *>( inTree->parent() ) ? static_cast<QgsLayerTreeGroup *>( inTree->parent() ) : group;
return parent->insertLayer( idx, layerToInsert );
}
QgsLayerTreeGroup* QgsLayerTreeView::currentGroupNode() const
{
QgsLayerTreeNode* node = currentNode();
if ( QgsLayerTree::isGroup( node ) )
return QgsLayerTree::toGroup( node );
else if ( QgsLayerTree::isLayer( node ) )
{
QgsLayerTreeNode* parent = node->parent();
if ( QgsLayerTree::isGroup( parent ) )
return QgsLayerTree::toGroup( parent );
}
if ( QgsLayerTreeModelLegendNode* legendNode = layerTreeModel()->index2legendNode( selectionModel()->currentIndex() ) )
{
QgsLayerTreeLayer* parent = legendNode->layerNode();
if ( QgsLayerTree::isGroup( parent->parent() ) )
return QgsLayerTree::toGroup( parent->parent() );
}
return 0;
}
