SUMMARY This could be due to a bug in qt. https://bugs.kde.org/show_bug.cgi?id=416361 But it might be a bug in kdenlive, I don't know. The scroll bar next to the effect list is not affected by any operations on the graphic tablet. The only way to operate here is to move with the cursor keys. For some reason (cooperation with related image processing software, convenience, coping with tenosynovitis, etc.), a user who is operating using a graphic tablet, that is, an operation that imposes inconvenience to a user who does not use a mouse. STEPS TO REPRODUCE 1. Using a graphic tablet 2. Click the scroll bar next to the effect list to operate OBSERVED RESULT Well, scrollbar doesn't respond EXPECTED RESULT Scroll bar can be operated on graphic tablet Operating System: Kubuntu 19.04 KDE Plasma Version: 5.16.5 KDE Frameworks Version: 5.62.0 Qt Version: 5.12.2
i created cant scroll movie. version 18 and newer. see? kdenlive can't scroll with graphic stylus. this bug confirmed from opensuse tumbleweed so qt 15.14.1. and kubuntu 19.10. qt cant fix this bug? https://bugreports.qt.io/browse/QTBUG-77826 or maybe this issue with kdenlive.
Created attachment 126079 [details] cant scroll on effect list and other menu window. cant scroll on effect list and other menu window.
sorry this video too small. where can attachment 2 [details] minute video file on web site?
Thanks for your report! I can not confirm with my graphic tablet if I use the stylus with version 20.12.3
Can confirm on Kdenlive version 21.08.2 with: Plasma Version: 5.23.0 Frameworks Version: 5.87.0 Qt Version: 5.15.3