App: fix performance issue when closing a project with a lot of layers

qgis · Oct 21, 2022 · b289051 · b289051
1 parent f7c58a5
commit b289051
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
@@ -14201,6 +14201,10 @@ void QgisApp::closeProject()
   // Avoid unnecessary layer changed handling for each layer removed - instead,
   // defer the handling until we've removed all layers
   mBlockActiveLayerChanged = true;
+  // Explicitly unset the selection in the layer tree view, otherwise we get
+  // bad performance when the project has a big number of layers, which causes
+  // the current index to be changed many times.
+  mLayerTreeView->setCurrentIndex( QModelIndex() );
   QgsProject::instance()->clear();
   mBlockActiveLayerChanged = false;