layouts (tiling / relative resizing)

[vlappa]

A bit related to this discussion: #189

When looking at the layouts demo, it seems those examples uses exact sizes:
https://github.com/david-vanderson/dvui/blob/main/src/Examples.zig#L1520

But this doesn't work in tiling window manager like sway, dwm, or river (unless you toggle to specific window to 'float'). I think a principle of such tiling WM's is that every window should be able have any size.

The following window (taken from the demo) works in 'floating mode', but not in tiling mode.

The expecting behavior would be that the dvui gui/widgets scales to window size given by the tiling WM.

float:

tiling:

[david-vanderson]

I'm not sure I understand. Individual widgets in dvui are never in their own windows, and everything in dvui is in a single OS window. That OS window will do whatever your window manager tells it to, but the widgets inside don't participate.

For example, a dvui.box is primarily used to position widgets inside a window. Is there some way you got it outside a window? Or are these images mockups?

[vlappa]

These are screenshots, not mockups.

This is what happens when I use a qt application in tiling and floating mode (set the individual app to float). I guess qt also uses widgets, but you see they're resizing relatively with the window.

[david-vanderson]

Ah okay. Usually applications use a mix of fixed size and expanded widgets. In dvui the .expanded option will make widgets fill the space in their parent. Does that help?

[vlappa]

Would this relative resizing be possible in dvui currently?

If not, I think it would be good to implement a way so it does as it's conceptually nice if this is supported and practically tiling WM's are used quite a lot (on Linux) and more regular WM's like Gnome also implemented some tiling functionality lately.

[david-vanderson]

Yes it is possible, you need to use .expanded on all the widgets. Try making a small example!

[vlappa]

Ok confirmed, a combination of nested widgets, the use of .expand, Gravity where needed and deinit on the right locations seems to do the trick for me.

https://github.com/david-vanderson/dvui?tab=readme-ov-file#widget-init-and-deinit