Feed Qt logs into Python's logging system.

noisicaa/logging.py

@@ -22,9 +22,12 @@ import sys
 import logging.handlers
 from logging import *  # pylint: disable=unused-wildcard-import,wildcard-import
 import queue
+import traceback
 from typing import Any, Dict, Optional, List, Tuple
 from typing_extensions import Literal
 
+from PySide2 import QtCore
+
 from . import logsink
 
 
@@ -118,6 +121,9 @@ class LogManager:
         self.queue_handler = logging.handlers.QueueHandler(self.queue)
         self.root_logger.addHandler(self.queue_handler)
 
+        # Feed Qt logs into logging system
+        QtCore.qInstallMessageHandler(self.__qtMessageHandler)
+
         # Make loggers of 3rd party modules less noisy.
         for other in ('qasync', 'vext'):
             getLogger(other).setLevel(WARNING)
@@ -174,3 +180,35 @@ class LogManager:
             '%(asctime)s\t%(levelname)s\t%(process)s\t%(thread)08x\t%(name)s\t%(message)s',
             '%Y%m%d-%H%M%S'))
         return handler
+
+    __qtLevelMap = {
+        QtCore.QtDebugMsg: logging.DEBUG,
+        QtCore.QtInfoMsg: logging.INFO,
+        QtCore.QtWarningMsg: logging.WARNING,
+        QtCore.QtCriticalMsg: logging.ERROR,
+        QtCore.QtFatalMsg: logging.CRITICAL,
+    }
+
+    def __qtMessageHandler(
+            self,
+            msg_type: QtCore.QtMsgType,
+            context: QtCore.QMessageLogContext,
+            msg: str,
+    ) -> None:
+        try:
+            if context.category is None or context.category == 'default':
+                loggerName = 'qt'
+            else:
+                loggerName = context.category
+            logger = logging.getLogger(loggerName)
+            record = logger.makeRecord(
+                name=loggerName,
+                level=self.__qtLevelMap[msg_type],
+                fn=context.file,
+                lno=context.line,
+                msg=msg, args=(),
+                exc_info=None,
+                func=context.function)
+            logger.handle(record)
+        except:
+            traceback.print_exc()

noisicaa/ui/main.py

@@ -103,6 +103,8 @@ class MainApp(App):
             logger = logging.getLogger('noisicaa.ui.main')
             logger.info("Starting noisicaa UI...")
 
+            os.environ['QT_LOGGING_RULES'] = 'qt.scenegraph.general=true'
+
             self.__qtApp = QtGui.QGuiApplication(argv)
             self.__qtApp.setQuitOnLastWindowClosed(False)
             self.__qtApp.setOrganizationName("odahoda")