When zooming window, the window size range must be adjusted

[MatthiasWM]

Describe the bug
If a window has a size range (minimum size, maximum size), and the user zooms into the window using Ctrl-Shift-"+", the size range stays in host coordinates, but it should be adjusted to the zoom factor.

To Reproduce
Launch test/tile, resize to minimal size, zoom to 150%. We can make the window even smaller now, causing overlapping.

Expected behavior
The size range should adapt to the zoom factor.

FLTK Version

• Version: 1.4.0
• If from Git, branch: master

Operating System / Platform:

• macOS Sonoma 14.2.1, Xcode 15.1

[Albrecht-S]

the size range stays in host coordinates, but it should be adjusted to the zoom factor.

Good point. To clarify: the size range values stored in Fl_Window must not be changed but the size range values known to the OS or window manager must be modified and communicated to the OS or WM. The latter is obviously platform specific but very likely needed on all four current platforms (counting X11 + Wayland as two distinct platforms).

Issue confirmed on Linux.

[ManoloFLTK]

@MatthiasWM Please, close issue if you confirm it's fixed.

[MatthiasWM]

Perfect. Thank you!