QModelIndex QgsLayerTreeModel::parent( const QModelIndex &child ) const
{
if ( !child.isValid() )
return QModelIndex();
QgsLayerTreeNode* n = index2node( child );
QgsLayerTreeNode* parentNode = 0;
if ( !n )
{
QgsLayerTreeModelLegendNode* sym = index2symnode( child );
Q_ASSERT( sym );
parentNode = sym->parent();
}
else
parentNode = n->parent(); // must not be null
Q_ASSERT( parentNode );
QgsLayerTreeNode* grandParentNode = parentNode->parent();
if ( !grandParentNode )
return QModelIndex(); // root node -> invalid index
int row = grandParentNode->children().indexOf( parentNode );
Q_ASSERT( row >= 0 );
return createIndex( row, 0, static_cast<QObject*>( parentNode ) );
}
Qt::ItemFlags QgsLayerTreeModel::flags( const QModelIndex& index ) const
{
if ( !index.isValid() )
{
Qt::ItemFlags rootFlags = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
if ( testFlag( AllowNodeReorder ) )
rootFlags |= Qt::ItemIsDropEnabled;
return rootFlags;
}
if ( QgsLayerTreeModelLegendNode* symn = index2symnode( index ) )
{
Qt::ItemFlags f = symn->flags();
if ( !testFlag( AllowSymbologyChangeState ) )
f &= ~Qt::ItemIsUserCheckable;
return f;
}
Qt::ItemFlags f = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
if ( testFlag( AllowNodeRename ) )
f |= Qt::ItemIsEditable;
QgsLayerTreeNode* node = index2node( index );
bool isEmbedded = node->customProperty( "embedded" ).toInt();
if ( testFlag( AllowNodeReorder ) )
{
// only root embedded nodes can be reordered
if ( !isEmbedded || ( isEmbedded && node->parent() && !node->parent()->customProperty( "embedded" ).toInt() ) )
f |= Qt::ItemIsDragEnabled;
}
if ( testFlag( AllowNodeChangeVisibility ) && ( QgsLayerTree::isLayer( node ) || QgsLayerTree::isGroup( node ) ) )
f |= Qt::ItemIsUserCheckable;
if ( testFlag( AllowNodeReorder ) && QgsLayerTree::isGroup( node ) && !isEmbedded )
f |= Qt::ItemIsDropEnabled;
return f;
}
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;
}