Capture Qt log messages to Python logger

beeref/config.py

@@ -25,9 +25,6 @@ from PyQt6 import QtCore
 from beeref import constants
 
 
-logger = logging.getLogger(__name__)
-
-
 parser = argparse.ArgumentParser(
     description=f'{constants.APPNAME_FULL} {constants.VERSION}')
 parser.add_argument(
@@ -185,3 +182,25 @@ logging_conf = {
 
 
 logging.config.dictConfig(logging_conf)
+
+
+# Redirect Qt logging to Python logger:
+qtlogger = logging.getLogger('Qt')
+
+
+def qt_message_handler(mode, context, message):
+    logfuncs = {
+        QtCore.QtMsgType.QtDebugMsg: qtlogger.debug,
+        QtCore.QtMsgType.QtInfoMsg: qtlogger.info,
+        QtCore.QtMsgType.QtWarningMsg: qtlogger.warning,
+        QtCore.QtMsgType.QtCriticalMsg: qtlogger.critical,
+        QtCore.QtMsgType.QtFatalMsg: qtlogger.fatal,
+    }
+    if context and (context.file or context.line or context.function):
+        message = (f'{message}: File {context.file}, line {context.line}, '
+                   f'in {context.function}')
+
+    logfuncs[mode](message)
+
+
+QtCore.qInstallMessageHandler(qt_message_handler)

tests/test_config.py

@@ -1,10 +1,13 @@
 import os.path
 import tempfile
+from types import SimpleNamespace
 from unittest.mock import patch
 
 import pytest
 
-from beeref.config import CommandlineArgs
+from PyQt6 import QtCore
+
+from beeref.config import CommandlineArgs, qt_message_handler
 
 
 def test_command_line_args_singleton():
@@ -71,3 +74,16 @@ def test_settings_recent_files_update_respects_max_num(settings):
     assert len(recent) == 10
     assert recent[0] == os.path.abspath('14.bee')
     assert recent[-1] == os.path.abspath('5.bee')
+
+
+@patch('beeref.config.qtlogger.info')
+def test_qt_message_handler_without(log_mock, qapp):
+    qt_message_handler(QtCore.QtMsgType.QtInfoMsg, None, 'foo')
+    log_mock.assert_called_once_with('foo')
+
+
+@patch('beeref.config.qtlogger.warning')
+def test_qt_message_handler_with_context(log_mock, qapp):
+    ctx = SimpleNamespace(file='bla.txt', line='1', function='myfunc')
+    qt_message_handler(QtCore.QtMsgType.QtWarningMsg, ctx, 'foo')
+    log_mock.assert_called_once_with('foo: File bla.txt, line 1, in myfunc')