Hello @SEMEH_SAYADI
Sorry for the late reply. The tag you inserted didn't work properly, so I wasn't notified about your request.
HSDPython_SDK is based on wheel packages installed through the provided installer. The source code is also released, and you are free to have a look at it, but the code running is related to the already-packaged wheel. So, you must act in the path where you installed our packages. Where did you install the SDK? Have you enabled a virtual environment before installing the SDK?
If so, the source code to modify is in your virtual environment under \Lib\site-packages\ (e.g., I built the virtual environment called .venv in the root folder of the SDK, so the code is in \Utilities\HSDPython_SDK\.venv\Lib\site-packages\st_dtdl_gui). If not, the package has been installed in your system Python home folder.
Widgets are divided into types: there is a file for each kind of widget (e.g., plots are organized into Lines, Heatmaps, Bars, etc.).
Best regards,
Simone