AttributeError: 'MainWindow' object has no attribute 'onWindowTitleChange'

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Jomali_3945 | 2020-05-07 14:43:37 UTC | #1

While running your example, I get the error: AttributeError: 'MainWindow' object has no attribute 'onWindowTitleChange'

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Wu_Yi | 2020-05-07 14:45:26 UTC | #2

I had the same problem, it seems that this signal is no longer available in the Qt QMainWindow class.


martin | 2020-05-10 09:41:25 UTC | #3

The onWindowTitleChange is a custom-defined slot (see the bottom of the example file) which you need to add yourself. The signal windowTitleChange is connected to this.

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python
# SLOT: This accepts a string, e.g. the window title, and prints it
def onWindowTitleChange(self, s):
    print(s)

Wu_Yi | 2020-05-10 09:41:24 UTC | #4

Thanks, that makes sense.

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tashasummers5448 | 2020-07-21 20:49:05 UTC | #5

I got the same error but my mistake was that I had copy/pasted the slots into the same indent level as the class MainWindow instead of the indent level of the def __init__. It worked once I moved them over.

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Martin Fitzpatrick

AttributeError: 'MainWindow' object has no attribute 'onWindowTitleChange' was written by Martin Fitzpatrick .

Martin Fitzpatrick has been developing Python/Qt apps for 8 years. Building desktop applications to make data-analysis tools more user-friendly, Python was the obvious choice. Starting with Tk, later moving to wxWidgets and finally adopting PyQt. Martin founded PythonGUIs to provide easy to follow GUI programming tutorials to the Python community. He has written a number of popular Python books on the subject.