From ba608ed5e02948255b138abf46c8a30a574f7b14 Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Thu, 2 Apr 2020 21:59:35 +0200
Subject: [PATCH] GUI: Windows: set verbose message format for qDebug()
 messages

---
 NEWS.md                               | 3 +++
 src/mkvtoolnix-gui/mkvtoolnix_gui.cpp | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/NEWS.md b/NEWS.md
index 71d505ef3..4e75a5422 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -12,6 +12,9 @@
 * mkvmerge: mkvmerge has never supported appending & splitting FLAC audio
   tracks. mkvmerge will now emit error messages when the user attempts either
   instead of continuing and creating invalid FLAC tracks.
+* MKVToolNix GUI: Windows: debug output sent via Qt's to Windows' debugging
+  facility will use a more verbose message format including the application
+  name, making it easier to filter for in SysInternal's "Debug View" utility.
 
 ## Bug fixes
 
diff --git a/src/mkvtoolnix-gui/mkvtoolnix_gui.cpp b/src/mkvtoolnix-gui/mkvtoolnix_gui.cpp
index dba47187a..96de855b8 100644
--- a/src/mkvtoolnix-gui/mkvtoolnix_gui.cpp
+++ b/src/mkvtoolnix-gui/mkvtoolnix_gui.cpp
@@ -34,6 +34,11 @@ enableOrDisableHighDPIScaling() {
 
 void
 initiateSettings() {
+#if defined(SYS_WINDOWS)
+  if (mtx::sys::get_environment_variable("").empty())
+    mtx::sys::set_environment_variable("QT_MESSAGE_PATTERN", "[%{type}] %{appname} (%{file}:%{line}) - %{message}");
+#endif
+
   QCoreApplication::setOrganizationName("bunkus.org");
   QCoreApplication::setOrganizationDomain("bunkus.org");
   QCoreApplication::setApplicationName("mkvtoolnix-gui");