I got fed up of ImGUI when I wanted to route events to my application instead of the GUI. Its good "out the box" ut when you need to get down and dirty to customise, it can be awkward.

Nowadays I do a hybrid approach, so I have use NanoGUI and create my own "live data" "retained mode" controls. Now I have either the best of both worlds or the worst of both worlds. I think the best:

Pros: - I don't have to bother with data binding. As the control is passed a pointer to the actual memory for he value, it can "go get it" when rendering, rather than my application setting its state. - I still have classes to represent elements and state, so its conceptually simple to build controls on controls. I found this difficult with Imgui.

Cons: - renders 100% full speed, but I am working on way to speed up and slow down render loop depending on user activity, so that when sitting idle, the cpu is not burning.