Undecorated-interactive stage style

[Michael Strauß]

2. From an implementation perspective, this doesn't need to be
supported explicitly by a platform.
For the move and resize behaviors, it uses existing
com.sun.glass.ui.Window APIs like setSize and setPosition.
I would imagine that these operations are no-ops for platforms that do
not support floating windows?

3. In general, move and resize works on all platforms via the new
`MoveResizeHelper` class (except for Windows, which uses a different
mechanism).
On Windows, the experience is improved by handling the WM_NCHITTEST
message, which enables support for advanced behaviors like Aero Snap.
Similarly, we can improve the experience on other platforms by
supporting more of their native features:
For example, on macOS, we could query the "Double-click a window's
title bar to zoom" system preference and maximize the window when we
detect a double click.
However, I do not intend to implement more specialized behavior for
macOS or Linux at this point, and leave that as a future optimization.


Am Fr., 30. Juli 2021 um 15:41 Uhr schrieb Kevin Rushforth
<kevin.rushforth at oracle.com>:
>
> This looks interesting and useful. I'd like to hear from other
> developers as well.
>
> A few comments:
>
> 1. We might want to consider whether there is a better name (nothing
> comes to mind at the moment)
> 2. This will almost certainly need to be a ConditionalFeature (since it
> might not be supportable on certain platforms, such as embedded platforms)
> 3. We will need an implementation on all three desktop platforms:
> Windows, macOS, Linux
> 4. You will need to add tests (at least manual if automated tests prove
> to be infeasible)
>
> -- Kevin
>