void QgsLayerTreeMapCanvasBridge::defaultLayerOrder( QgsLayerTreeNode* node, QStringList& order ) const
{
if ( QgsLayerTree::isLayer( node ) )
{
QgsLayerTreeLayer* nodeLayer = QgsLayerTree::toLayer( node );
order << nodeLayer->layerId();
}
foreach ( QgsLayerTreeNode* child, node->children() )
defaultLayerOrder( child, order );
}
void QgsLayerTreeMapCanvasBridge::setCustomLayerOrder( const QStringList& order )
{
if ( mCustomLayerOrder == order )
return;
// verify that the new order is correct
QStringList defOrder( defaultLayerOrder() );
QStringList newOrder( order );
QStringList sortedNewOrder( order );
qSort( defOrder );
qSort( sortedNewOrder );
if ( defOrder.size() < sortedNewOrder.size() )
{
// might contain bad layers, but also duplicates
QSet<QString> ids( defOrder.toSet() );
for ( int i = 0; i < sortedNewOrder.size(); i++ )
{
if ( !ids.contains( sortedNewOrder[i] ) )
{
newOrder.removeAll( sortedNewOrder[i] );
sortedNewOrder.removeAt( i-- );
}
}
}
if ( defOrder != sortedNewOrder )
return; // must be permutation of the default order
mCustomLayerOrder = newOrder;
emit customLayerOrderChanged( mCustomLayerOrder );
if ( mHasCustomLayerOrder )
deferredSetCanvasLayers();
}
QStringList QgsLayerTreeMapCanvasBridge::defaultLayerOrder() const
{
QStringList order;
defaultLayerOrder( mRoot, order );
return order;
}
void QgsLayerTreeMapCanvasBridge::clear()
{
setHasCustomLayerOrder( false );
setCustomLayerOrder( defaultLayerOrder() );
}
QStringList LayerTreeMapCanvasBridge::defaultLayerOrder() const
{
QStringList order;
defaultLayerOrder( mModel->rootGroup(), order );
return order;
}