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One of the KDE Plasma features I use almost in daily basis is the MouseMark.
Go to your settings, in Desktop Effects, Enable the MouseMark (you can change the settings of it in the button in front of it). Then press Meta+Shift and move your mouse to doodle, or press and release Meta+Shift+Ctrl to define beginning and end of an arrow (it will draw the rest.
Interestingly enough, it have been in Plasma for the past 16 years:
https://github.com/KDE/kde-workspace/tree/master/kwin/effects/mousemark
@Larvitz
Basically this is the chuck of code responsible which is how I figured out how to draw an arrow:
https://github.com/KDE/kde-workspace/blob/257b997132217fd73a1b3be14db49735b64235e7/kwin/effects/mousemark/mousemark.cpp#L204-L214
I also don't see any part in the code that can throw the error. Considering that this is such a simple code and have not changed for about a decade, I don't think the issue is wayland/x11 either.
I suggest filing a bug report with the screenshot of the error and etc.:
https://bugs.kde.org/buglist.cgi?quicksearch=mousemark&list_id=2631036
@[email protected] @[email protected]
@Larvitz
It seems the Github mirror is way out of date. I checked the https://invent.kde.org (the KDE's Gitlab instance) and found out that during the past 6 months MouseMark has received some updates, especially about the logic of arrow drawing:
https://invent.kde.org/plasma/kwin/-/commit/46807b1a72f1d760b52b92a574face4a7a509a39
But as far as I can tell, even if you have the latest build from the latest source code, the general process of drawing is the same:
https://invent.kde.org/plasma/kwin/-/blob/master/src/plugins/mousemark/mousemark.cpp#L178-192
@[email protected] @[email protected]
@Mehrad @[email protected] @[email protected] On my Desktop computer, running Arch Linux with Plasma 6.0.0, it works correctly. On my laptop with Fedora 39 and Plasma 5.27.10, it is bugged and doesn't work properly (Both running under Wayland).
Anyway, a great feature! Thank you very much for pointing it out.