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db3543d034
This is a really small PR so I am skipping the issue (based on contributing.md). This change adds an optional field and thus non breaking for the API. I ran into an issue during my development of an alerts manager widget ([see PR](https://github.com/blackberryfloat/egui_widget_ext/pull/2)) where I needed a scrollable overlay that did not block clicking areas of a parent widget when my alerts did not take up the entire parent. To achieve this I detect the sizing pass via the invisible flag and only render the alerts content and then on the next pass I add the scroll bar in around the alert content. Whenever the alert content changed though I would need to create a new Area with a new id to get proper sizing. That is a memory leak so I wanted to reset the size state to trigger a sizing pass. Memory is rightfully protected enough that the path to remove memory was dropped and I just added a hook to set a resize flag. I am sure there are better ways but this is what made sense to me. Looking forward to thoughts. ~~Logistics wise, I have proposed it as a patch because I was based off 0.31.1 for testing. I was also thinking it could be released quickly. I am happy to cherry pick onto main after. If that is not allowed I can rebase to main and pull against that.~~ (rebased on main) --------- Co-authored-by: Wesley Murray <murraywj97@gmail.com>
GUI implementation
This is the core library crate egui. It is fully platform independent without any backend. You give the egui library input each frame (mouse pos etc), and it outputs a triangle mesh for you to paint.