How to set size of widget based on parent

General discussion
1

I am trying to figure out how to set the size of a widget to take up all of the space allocated to it by the parent.

For example, if I have a tile that is 100% of the display (size set with lv_obj_set_size()), I want the child widget to take all of the areas of the tile’s content.

I’ve tried searching the documentation and the forums but I can’t find anything concrete. The closest I’ve gotten is LV_PCT() but I am not sure whether that means 100% of the content area for 100% of the child widget’s content width.

I’ve tried setting the child’s size using LV_PCT(100) but that does not seem to work.

2

https://docs.lvgl.io/9.3/details/common-widget-features/styles/style-properties.html#padding

3

Does that mean that the padding will force the widget’s content to be “the rest” of the space? My previous understanding was that the padding was a minimum space between the parent and child but is not absolute.

4

GPT

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and seems padding is in parrent …