Merge #4491 Fix freezing after startup with empty mod list

Author: HebaruSan

CHANGELOG.md

@@ -12,11 +12,12 @@ All notable changes to this project will be documented in this file.
 
 - [Core] Ensure encoding is UTF-8 when saving JSON (#4475, #4478 by: HebaruSan)
 - [GUI] Display release date in local time zone (#4488 by: HebaruSan)
+- [GUI] Fix freezing after startup with empty mod list (#4491 by: HebaruSan)
 
 ### Internal
 
 - [Docs] Update download count image for Minkowski² (#4474 by: Clayell; reviewed: HebaruSan)
-- [Netkan] Fix x_netkan_epoch not applied before unreliable server check (#4477 by: HebaruSan)
+- [Netkan] Fix `x_netkan_epoch` not applied before unreliable server check (#4477 by: HebaruSan)
 
 ## v1.36.2 (Politas)
 

GUI/Controls/ManageMods.cs

@@ -45,7 +45,7 @@ public ManageMods()
                                             Util.Debounce<EventArgs>((sender, e) => {},
                                                                      (sender, e) => false,
                                                                      (sender, e) => false,
-                                                                     ModGrid_SelectionChanged,
+                                                                     (sender, e) => Util.Invoke(this, () => ModGrid_SelectionChanged(sender, e)),
                                                                      100));
 
             repoData = ServiceLocator.Container.Resolve<RepositoryDataManager>();
@@ -138,7 +138,7 @@ private List<string> SortColumns
 
         private List<bool> descending => guiConfig?.MultiSortDescending ?? new List<bool>();
 
-        public event Action<GUIMod>? OnSelectedModuleChanged;
+        public event Action<GUIMod?>? OnSelectedModuleChanged;
         public event Action<List<ModChange>?, Dictionary<GUIMod, string>?>? OnChangeSetChanged;
         public event Action? OnRegistryChanged;
 
@@ -706,9 +706,9 @@ private void ModGrid_SelectionChanged(object? sender, EventArgs? e)
             }
 
             var module = SelectedModule;
+            OnSelectedModuleChanged?.Invoke(module);
             if (module != null)
             {
-                OnSelectedModuleChanged?.Invoke(module);
                 NavSelectMod(module);
             }
         }

GUI/Main/Main.cs

@@ -823,7 +823,7 @@ public bool PreFilterMessage(ref Message m)
             return false;
         }
 
-        private void ManageMods_OnSelectedModuleChanged(GUIMod m)
+        private void ManageMods_OnSelectedModuleChanged(GUIMod? m)
         {
             if (MainTabControl.SelectedTab == ManageModsTabPage)
             {