Not possible to resize Launchers on touch screens

[martaszmit]

Description

I tried to use JupyterLab (browser version) on my tablet (Microsoft Surface Pro 9), but it is not possible to resize Launchers using touch. It works fine using mouse.

Reproduce

Add multiple Launchers and try to resize it.

Expected behavior

Resizing should be possible on touch screens like it is when using mouse.

Context

• Operating System and version: Windows 11 Home
• Browser and version: Chrome
• Jupyter version: https://jupyter.org/try-jupyter/lab/

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[krassowski]

That's odd, since lumino 2.0 (included in JupyterLab 4.x) we are using pointer events rather than mouse events so it should no longer be the case.

https://jupyter.org/try-jupyter/lab/

As of today this is using JupyterLab 4.0.11.

[JasonWeill]

Curious whether this also occurs in Lab 4.1 or 4.2 alpha.

[martaszmit]

It works much better on my iPad, but doesn't work on my Windows devices. Not sure how about Android, because I don't have any device to test it. It also doesn't work in browser developer tools while simulating touch.

[krassowski]

It also doesn't work in browser developer tools while simulating touch.

Right, I can reproduce this. I see that there is something off with pointer events for handlers in lumino, but do not immediately see what is wrong. Maybe we should use https://developer.mozilla.org/en-US/docs/Web/API/Element/setPointerCapture API, not sure how much it would help though.