[LyX/2.4.x] Allow negative offset in GuiLine (#13102)

[Juergen Spitzmueller]

commit f56fcd01a289443d33f613de4f173ab7f03c8473
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Wed Sep 25 09:53:00 2024 +0200

    Allow negative offset in GuiLine (#13102)
    
    (cherry picked from commit 2244ac3dee416235b49e671b67d63d2ca1f4dcb6)
---
 src/frontends/qt/GuiLine.cpp | 5 ++++-
 status.24x                   | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/frontends/qt/GuiLine.cpp b/src/frontends/qt/GuiLine.cpp
index 2a8b9de2bc..8587a5d6eb 100644
--- a/src/frontends/qt/GuiLine.cpp
+++ b/src/frontends/qt/GuiLine.cpp
@@ -56,7 +56,10 @@ GuiLine::GuiLine(QWidget * parent) : InsetParamsWidget(parent)
 	addCheckedWidget(WidthLE, WidthValueL);
 	addCheckedWidget(HeightLE, HeightValueL);
 
-	OffsetLE->setValidator(unsignedGlueLengthValidator(OffsetLE));
+	// Set up a signed glue length validator
+	LengthValidator * v = new LengthValidator(OffsetLE);
+	v->setBottom(GlueLength());
+	OffsetLE->setValidator(v);
 	WidthLE->setValidator(unsignedGlueLengthValidator(WidthLE));
 	HeightLE->setValidator(unsignedGlueLengthValidator(HeightLE));
 
diff --git a/status.24x b/status.24x
index 7dd76024cc..d505c33fd9 100644
--- a/status.24x
+++ b/status.24x
@@ -58,6 +58,7 @@ What's new
 
 * USER INTERFACE
 
+- Allow negative offset values in Horizontal Line dialog (bug 13102).
 
 
 * INTERNALS