Mastering GUI Programming with Python

Automatic signal and slot connections

Take another look at the Ui_ class generated by pyuic5 and notice the last line of code in setupUi:

        QtCore.QMetaObject.connectSlotsByName(MainWindow)

connectSlotsByName() is a method that will automatically connect signals and slots by matching up signals to methods named in the on_object_name_signal() format, where object_name matches the objectName property of a PyQt object and signal is the name of one of its built-in signals.

For example, in our CategoryWindow, we would like to create a callback that runs when submit_btn is clicked (if you made your own .ui file, make sure you named your submit button submit_btn). That will happen automatically if we name the callback on_submit_btn_clicked().

The ...