Crash while resizing docked windows when one of the windows is not visible.

[Myszkoj]

Hi! I keep getting this assertion:

I made this example to show when this happes:

At first i thought i messed up something in the code, but i managed to reproduce this crash in your Demo -> Examples -> Documents:

In this example I have docked 3 windows, one after another (Eggplant, Lettuce, Carrot), then I closed the Lettuce window and moved splitter towards the Eggplant, after this I reopened the Lettuce window and the same crash appeared again.

I downloaded imgui-docking.zip on 24th of June 2020.

[ocornut]

Thanks for the report, confirmed.
I have I have a fix/branch somewhere where I was working on it, will investigate.

[ocornut]

Pushed a fix I had in another branch.
Since there's not enough space for both windows in that small node it'll look weird but it's easy to recover it by resizing.

I'm working on toolbar usage patterns which requires nodes pushing back for the size they need, and it may lead further related changes.