From 8d1d365bf7ae973e2e2098cc909e325246eb0e0c Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Mon, 17 Jun 2019 20:37:07 +0200
Subject: [PATCH] GUI: mux: reset tab name when destination file name is
 cleared

Only the Windows version was affected. Fixes #2571.
---
 NEWS.md                             | 2 ++
 src/mkvtoolnix-gui/merge/output.cpp | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/NEWS.md b/NEWS.md
index c6d721856..04881a5f1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -10,6 +10,8 @@
 
 * mkvmerge: the "codec name" track property wasn't copied from Matroska
   files. Fixes #2566.
+* MKVToolNix GUI: multiplexer: Windows: clearing the destination file name
+  will reset the tab name to "<No destination file>" again. Fixes #2571.
 
 
 # Version 34.0.0 "Sight and Seen" 2019-05-18
diff --git a/src/mkvtoolnix-gui/merge/output.cpp b/src/mkvtoolnix-gui/merge/output.cpp
index f0488ce06..1b4e825cc 100644
--- a/src/mkvtoolnix-gui/merge/output.cpp
+++ b/src/mkvtoolnix-gui/merge/output.cpp
@@ -342,6 +342,12 @@ Tab::onTitleChanged(QString newValue) {
 
 void
 Tab::setDestination(QString const &newValue) {
+  if (newValue.isEmpty()) {
+    m_config.m_destination.clear();
+    emit titleChanged();
+    return;
+  }
+
 #if defined(SYS_WINDOWS)
   if (!newValue.contains(QRegularExpression{Q("^[a-zA-Z]:[\\\\/]|^\\\\\\\\.+\\.+")}))
     return;