SUMMARY If I hold Ctrl, hold a left click, make a selection rectangle, and try to expand this selection rectangle by scrolling upwards or downwards with the mouse (so as to cover files which are not currently visible), it will interpret the action as changing the zoom level instead. STEPS TO REPRODUCE 1. Launch dolphin and go into a folder that would have enough contents to make it scrollable. 2. Move to the middle of the folder in terms of the scroll bar. 3. Select some file by clicking its "plus" icon. 4. Try to expand this selection by holding Ctrl, then adding files within a selection rectangle with the mouse (by holding a left click and moving the mouse so as to expand the rectangle). 5. Once everything in the currently visible section within the scrollbar, and while still holding Ctrl and the left click, try to expand the selection by scrolling with the mouse wheel from where you currently are. OBSERVED RESULT Changes the zoom level. EXPECTED RESULT Should scroll and expand the selection rectangle as it does so. SOFTWARE/OS VERSIONS Operating System: Debian GNU/Linux KDE Plasma Version: 5.24.2 KDE Frameworks Version: 5.90.0 Qt Version: 5.15.2 Kernel Version: 5.16.0-4-amd64 (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 2700 Eight-Core Processor Memory: 15.6 GiB of RAM Graphics Processor: AMD VEGA10
Sadly this is borderline-unfixable on X11, but it already works properly on Wayland. It's just one of those reasons to switch to Wayland. :)