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In the designer when I right click a widget, and I click promote to I get this window. See the screenshot below.
I have never used this feature. Basically, the header file is confusing me. What is it for? Does that mean I can create a new class in this case, inheriting QLineEdit and add more methods to it? What is the promoted class name?
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PySide2 Tutorial — Creating applications with Qt Designer The good news is that Qt comes with a graphical editor — Qt Designer — which contains a drag-and-drop UI editor. Using Qt Designer you can define your UIs visually and then simply hook up the application logic later.
Note: The UI text in Qt Creator and the contents of the generated files depend on the Qt Creator version that you use. To create the Notepad project, select File > New Project > Application (Qt) > Qt Widgets Application > Choose, and follow the instructions of the wizard.
How to Start the PyQt5 Designer tool. Go to C:\Program Files (x86)\Python36-32\Lib\site-packages\pyqt5-tools and locate designer.exe . Double click to open the Qt Designer. Note: The path will vary based on the OS you're using.
This allows you to use custom widgets defined elsewhere, which designer otherwise wouldn't know about.
For example, if you've defined a widget MyLabel derived from QLabel, then you can define it here and then just insert a QLabel as placeholder in your ui and promote it to MyLabel.
The uic compiler will then include the necessary imports/includes, for example if you specified mypackage/mycomponent.h as header file and MyLabel as class name, then pyuic will add
from mypackage.mycomponent import MyLabel
(note how the .h is ignored, and slashes are converted to . by pyuic to keep compatibility with python)
Global include is ignored by pyuic, it only affects uic (generate #include "mypackage/mycomponent.h" or #include <mypackage/mycomponent.h> for c++)
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