PySimpleGUI doesn't and can't provide every single setting available in the underlying GUI framework. Not all tkinter options are available for a
Text Element. Same with PySimpleGUIQt and the other ports.
There are a few of reasons for this.
- Time & resource limits - The size of the PySimpleGUI development team is extremely small
- PySimpleGUI provides a "Unified API". This means the code is, in theory, portable across all of the PySimpleGUI ports without chaning the user's code (except for the import)
- PySimpleGUI is meant, by design, to be simple and cover 80% of the GUI problems.
However, PySimpleGUI programs are not dead ends!! Writing PySimpleGUI code and then getting to a point where you really really feel like you need to extend the Listbox to include the ability to change the "Selected" color. Maybe that's super-critical to your project. And maybe you find out late that the base PySimpleGUI code doesn't expose that tkinter capability. Fear not! The road does continue!!