Styles and themes as is are very powerful, but they could use some additions to them.
For example, it would be nice to be able to automagically set a specific theme to an object, regardless of object type. I am thinking something like lv_obj_set_theme, or wherever. This would then set the selected theme to all of the subthemes of an object.
Lets say you want to use LV_THEME_PRETTY_COLOR on everything, you currently have to go an set it over and over for each of the objects you create. It would be nice to:
A) Have a way to set the default theme for all new objects
B) Reset the theme once, and all subthemes get set as well.
I realize this wont work for some things (Like something that has a built in inactive and active theme, if they were both set to the same thing, you would not be able to visually see the difference).
This is really a “Thinking out loud exercise” to get peoples opinions and thoughts, I think there is room for improvement here, and the current code is a really good start.