From b984ee0d5784a7e994203a0fbd9534a71e7f6265 Mon Sep 17 00:00:00 2001
From: Ajinkya Dahale <AjinkyaDahale@users.noreply.github.com>
Date: Thu, 13 Mar 2025 03:42:47 +0530
Subject: [PATCH] [Sketcher] Attempt to avoid double-trimming in some cases

Possibly fixes #19425 and/or #20081.
---
 src/Mod/Sketcher/Gui/DrawSketchHandlerTrimming.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Mod/Sketcher/Gui/DrawSketchHandlerTrimming.h b/src/Mod/Sketcher/Gui/DrawSketchHandlerTrimming.h
index 6ece33ec1b..83bbca9a19 100644
--- a/src/Mod/Sketcher/Gui/DrawSketchHandlerTrimming.h
+++ b/src/Mod/Sketcher/Gui/DrawSketchHandlerTrimming.h
@@ -164,6 +164,11 @@ public:
             return;
         }
 
+        // FIXME: Attempt to avoid double trimming. This messes up the cursor.
+        // Possibly `mouseMove` gets triggered after first trim, but before preselection,
+        // resulting in another edge being deleted.
+        Gui::Selection().rmvPreselect();
+
         const Part::Geometry* geo = sketchgui->getSketchObject()->getGeometry(GeoId);
         if (geo->isDerivedFrom<Part::GeomTrimmedCurve>() || geo->is<Part::GeomCircle>()
             || geo->is<Part::GeomEllipse>() || geo->is<Part::GeomBSplineCurve>()) {