Can't resize window without decorations

[CryZe]

When disabling decorations, the window can't be resized anymore, even with .with_resizable(true) specified. Maximizing and other operations don't seem to work either.

[francesca64]

Thanks for reporting this! I've successfully reproduced it.

This repo looks like a good exploration of how to fix this: https://github.com/melak47/BorderlessWindow

@Osspial, do you want to tackle this, or should I?

[Osspial]

@francesca64 I'll look into this.

[Osspial]

It's not immediately clear what the best solution is for fixing this. The reason borderless windows can't be resized on Windows is that Windows, by default, shows resize handles on the window borders. The way melak47/BorderlessWindow works is that it reworks the resize detection code so that the resize handles appear inside the window's client area, and I'm not comfortable with automatically taking over an amount the edges of Winit windows to enable resize handles.

In the past, people have brought up having some sort of API for creating resize borders in the client area of borderless windows. @francesca64 What does the situation look like for resizing borderless windows on other platforms? If most/all of them have this behavior I think we should look into what API changes we'd need to support this.

If most other platforms do let you resize borderless windows, we could set it up so that you can drag on the window shadow to handle resizing. This is what Windows 10 does, but it's inconsistent with Windows 7 and may not work on Windows 7 machines with Aero disabled (since windows with that configuration don't have a window shadow).

[FrankenApps]

I think the best solution would be to implement this the same way it is done in Electron.

[i509VCB]

I've tested this with X11 and Wayland in KDE and a window there is not resizable without decorations even when explicitly specifying with_resizable(true).

Cannot test in GNOME or other DEs sadly.

[garasubo]

I've tested this with X11 in GNOME Ubuntu, and it is not resizable either when with_decorations(false)

[i509VCB]

I noticed this option in KDE, specifically in plasma settings, however enabling the option to add a handle to resize windows with no border does NOT change behavior from winit X11 or wayland.

Uhh who would we ask here to change the labels on the issue so this is recognized as multi-platform?

[maroider]

Uhh who would we ask here to change the labels on the issue so this is recognized as multi-platform?

:)

The people listed as either a maintainer or contributor in this table should usually be a good bet.

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There are a couple of other issues on the issue tracker which are related to this issue, but which somehow haven't been linked: #221 (custom resize and dragging areas) and #1548 (aero snapping and maximization). I guess since #221 got closed, we can use this issue as the place to track custom resize areas.