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43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
# From https://timlehr.com/python-exception-hooks-with-qt-message-box/
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import logging
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import sys
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import traceback
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from PySide2.QtCore import Signal, QObject
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from PySide2.QtWidgets import QMessageBox, QApplication
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class UncaughtExceptionHandler(QObject):
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_exception_caught = Signal(str, str)
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def __init__(self, parent: QObject):
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super().__init__(parent)
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sys.excepthook = self.exception_hook
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# Use a signal so that the message box always comes from the main thread.
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self._exception_caught.connect(self.show_exception_box)
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def exception_hook(self, exc_type, exc_value, exc_traceback):
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if issubclass(exc_type, KeyboardInterrupt):
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# Ignore keyboard interrupt to support console applications.
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sys.__excepthook__(exc_type, exc_value, exc_traceback)
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return
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logging.exception(
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"Uncaught exception", exc_info=(exc_type, exc_value, exc_traceback)
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)
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self._exception_caught.emit(
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str(exc_value),
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"".join(traceback.format_exception(exc_type, exc_value, exc_traceback)),
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)
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def show_exception_box(self, message: str, exception: str) -> None:
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if QApplication.instance() is not None:
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QMessageBox().critical(
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QApplication.focusWidget(),
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"An unexpected error occurred",
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"\n".join([message, "", exception]),
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QMessageBox.Ok,
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)
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else:
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logging.critical("No QApplication instance available.")
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