From 0f2d711f34da8f3e573d96a87fc31095651c28b7 Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Wed, 29 Dec 2021 14:43:52 +0100
Subject: [PATCH] Fix TOC filtering with slashes (#12359)

Seems the * wildcard does not match these.
---
 src/frontends/qt/TocWidget.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/frontends/qt/TocWidget.cpp b/src/frontends/qt/TocWidget.cpp
index cd346a889e..483f008426 100644
--- a/src/frontends/qt/TocWidget.cpp
+++ b/src/frontends/qt/TocWidget.cpp
@@ -523,8 +523,13 @@ void TocWidget::filterContents()
 
 	QModelIndexList indices = tocTV->model()->match(
 		tocTV->model()->index(0, 0),
-		Qt::DisplayRole, "*", -1,
-		Qt::MatchFlags(Qt::MatchWildcard|Qt::MatchRecursive));
+		Qt::DisplayRole, ".*", -1,
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
+		Qt::MatchFlags(Qt::MatchRegularExpression|Qt::MatchRecursive));
+#else
+		// deprecated in Qt 5.15.
+		Qt::MatchFlags(Qt::MatchRegExp|Qt::MatchRecursive));
+#endif
 
 	bool const show_active =
 		activeFilterCO->currentIndex() != 2;