Bug 489822

Created attachment 171419 [details]
Video showing Maliit coming back up when touch scrolling in kate

SUMMARY

I'm sorry to file another touch bug since I know kate isn't tested on that, but 1. this one seems to be a fundamental Qt or Plasma issue since konsole is also affected ( https://bugs.kde.org/show_bug.cgi?id=489672 ) and you might know what's actually the responsible component, 2. it's fairly high impact, sadly, making even passively scrolling code almost impossible.

Basically, a touch single tap or long tap on a text input field is meant to bring up the touch keyboard, in this case maliit, to enter text. However, when the user hides the touch keyboard and then touch scrolls, the keyboard must not come back up because it'll obscure what the user is just trying to look at - the document that is being scrolled. This is also how Phosh & squeekboard & gedit handle it, for example, but for KDE & Maliit & kate/konsole don't and make any touch scroll attempt make the keyboard come back up and obscure everything.

A video is attached where I'm testing this on a tablet form factor.

This also affects convertibles like Thinkpad Yoga's, and possibly any other touch laptop where Maliit may additionally be used on top of regular desktop controls. So it's not just a pure tablet or pure phone form factor issue.

STEPS TO REPRODUCE

1.  Use a linux device with a touch screen, form factor should be tablet or laptop so that KDE fits on the screen.
2. Install Plasma and Kate and Maliit, and make sure in KDE System settings Maliit is enabled
3. Launch a KDE Wayland session and launch kate
4. Open longer code file in kate that doesn't fit on the screen without scrolling.
5. Tap kate's code area to focus on it. Maliit should come up if it hasn't already.
6. Hide Maliit again.
7. Put your finger on the code area and move it vertically without lifting for touch scrolling.

OBSERVED RESULT

Maliit comes back up when touch scrolling, see video.

EXPECTED RESULT

Maliit doesn't come back up so that it's possible to actually see the document, like Phosh+squeekboard+gedit handle it.

SOFTWARE/OS VERSIONS

Windows: 
macOS: 
Linux/KDE Plasma: postmarketOS Edge
(available in About System)
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.6.3

ADDITIONAL INFORMATION

Konsole affected as well, so I'm guessing this is a Qt or KDE Frameworks or Plasma bug. I just don't know which component it actually is.