From 7e554b1ac6701fc622af415f04790793a130d616 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Mon, 6 Mar 2023 12:23:20 +1000
Subject: [PATCH] Use task based legend filter by map for main canvas

Otherwise QGIS frequently hangs for extended periods whenever
the filter by map option is enabled!
---
 src/app/qgisapp.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index 39b6ffa9618..90d602382bb 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -4768,6 +4768,7 @@ void QgisApp::initLayerTreeView()
   model->setFlag( QgsLayerTreeModel::ShowLegendAsTree );
   model->setFlag( QgsLayerTreeModel::UseEmbeddedWidgets );
   model->setFlag( QgsLayerTreeModel::UseTextFormatting );
+  model->setFlag( QgsLayerTreeModel::UseThreadedHitTest );
   model->setAutoCollapseLegendNodes( 10 );
 
   mLayerTreeView->setModel( model );