For a device we develop, we currently use Raspberry Pi 3 board. For user interface, we want to use Elegoo 3.5" TFT touch display (XPT2045 touch). Code is written in python. We got the display working over SPI interface using https://pypi.org/project/gfxlcd/ library, but using it directly would require us to program all basics like buttons, etc. I would prefer to keep the display separate from the desktop environment if possible.
Could anyone suggest a good lightweight GUI Framework for this? It should have some basic screen layout (tile, stack) and simple widgets like scrollbar, checkbox, button and progress bar.