From 53f21809d18280bb438e14f2f918927c9e433bd2 Mon Sep 17 00:00:00 2001
From: Maxim Ganetsky <maxim@lazarus-ide.org>
Date: Fri, 20 Oct 2023 18:10:00 +0300
Subject: [PATCH] Revert "LCL: Do not Invalidate a CustomGrid in every MouseUp.
 Merge request !66 by Petr Kristan."

This reverts commit 7f6c15e911bb932d4fbf063c83c40d8f2c755103.

It caused an incompatibility for subclassed DrawGrids, issue #40550.
---
 lcl/grids.pas | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lcl/grids.pas b/lcl/grids.pas
index 6ca5083d09..b035e33446 100644
--- a/lcl/grids.pas
+++ b/lcl/grids.pas
@@ -7187,6 +7187,8 @@ begin
       if FMoveLast.X>=0 then InvalidateRow(0);
       if FMoveLast.Y>=0 then InvalidateCol(0);
     end;
+    {$else}
+    Invalidate;
     {$endif}
     if not (fGridState in [gsColMoving,gsRowMoving]) then
       RestoreCursor;