Frameless Window can't be resized on Mac OS X

[skarndev]

Frameless Window can't be resized on Mac OS X

[wangwenx190]

Several people told me about this issue, it seems the startSystemResize() function is unusable on macOS.

[wangwenx190]

See: https://doc.qt.io/qt-5/qwindow.html#startSystemResize

[skarndev]

Yeah, thanks for pointing the issue out. Is there a way to track those mouse movements on the edge manually?
It seems we can check against system resize support by doing this:

if (!window.startSystemResize(edges)) {
// fallback code for setting window.width/height manually
}

It should return false if not supported.

[wangwenx190]

Yeah, thanks for pointing the issue out. Is there a way to track those mouse movements on the edge manually?
It seems we can check against system resize support by doing this:

if (!window.startSystemResize(edges)) {
// fallback code for setting window.width/height manually
}

It should return false if not supported.

Sounds reasonable. I'll try to implement this.

[wangwenx190]

Now I know the frameless window can't be resized, but can it be moved by dragging the custom title bar?

[wangwenx190]

New commit uploaded. Can you test the latest code?

[wangwenx190]

If this issue still exists, please inform me.

[skarndev]

Now I know the frameless window can't be resized, but can it be moved by dragging the custom title bar?

Yes, it works. It also gets resized by double clicking on the titlebar.

If this issue still exists, please inform me.

Yes, the issue still exists. It does resize now, but does not resize with delta, it jumps to a certain extent. The video is below.
https://youtu.be/l3NAXiTq9Ow

[wangwenx190]

Now I know the frameless window can't be resized, but can it be moved by dragging the custom title bar?

Yes, it works. It also gets resized by double clicking on the titlebar.

If this issue still exists, please inform me.

Yes, the issue still exists. It does resize now, but does not resize with delta, it jumps to a certain extent. The video is below.
https://youtu.be/l3NAXiTq9Ow

OK, I see. I'm working on it.

[wangwenx190]

New commit uploaded. Can you test the latest code? I suggest you try more test cases: top bottom left right top-left top-right bottom-left bottom-right

[wangwenx190]

I don't have a mac so I'm relying on my imagination to debug this code. I want to see a screen record if possible, thanks.

[skarndev]

New commit uploaded. Can you test the latest code? I suggest you try more test cases: top bottom left right top-left top-right bottom-left bottom-right

Nope. Very wrong now. I suggest you turn off system resize logic for your case temporarily, so you can test it on your machine more easily.

https://youtu.be/xxApuQhrsKQ

[wangwenx190]

New commit uploaded. Can you test the latest code? I suggest you try more test cases: top bottom left right top-left top-right bottom-left bottom-right

Nope. Very wrong now. I suggest you turn off system resize logic for your case temporarily, so you can test it on your machine more easily.

https://youtu.be/xxApuQhrsKQ

It does look very strange now. Working on it.

[wangwenx190]

I made a bug report to the Qt company: https://bugreports.qt.io/browse/QTBUG-88218

If the Qt company are not willing to fix it in the near future, I'll implemenet an alternative solution.

[skarndev]

I made a bug report to the Qt company: https://bugreports.qt.io/browse/QTBUG-88218

If the Qt company are not willing to fix it in the near future, I'll implemenet an alternative solution.

Afaik it is not supported on other platforms as well. The other machine this was tested on running on Debian/GNOME/X11. Also returns false. Works on Windows though.

[wangwenx190]

Afaik it is not supported on other platforms as well. The other machine this was tested on running on Debian/GNOME/X11. Also returns false.

I tested this repo on Fedora KDE (X11) and it works well. And it should not return false on Linux:

[skarndev]

Afaik it is not supported on other platforms as well. The other machine this was tested on running on Debian/GNOME/X11. Also returns false.

I tested this repo on Fedora KDE (X11) and it works well. And it should not return false on Linux:

Maybe the issue is tied to GNOME environment?

[wangwenx190]

Maybe the issue is tied to GNOME environment?

Not sure. I didn't test in GNOME. One point: recent versions of GNOME is using Wayland instead of X11.

[wangwenx190]

Sadly the Qt engineer told me it's not possible to implement startSystemResize() on macOS. I'm not a macOS developer, so I don't know why, but it sounds like a technical limitation.

[wangwenx190]

Fixed in 2.0