How to development the interface like "Measure"

How to develop the property bar similar to the “Measure” function menu?

Mainly refers to the content marked in the red box below.

To achieve that level of customization you should use WPF together with the .NET api (
With the python API you can only add some properties and the app will show them based on their type.

Yeah, the action panel/task pane is quite limited with Python API. So WPF and .NET is the way to go to get what you need in terms of layout and controls, and look and feel.

OK ,I understand! Thank you all very much!