using the tooltip (inside trash:/ !) on a folder, it will copy that folder to /tmp. Problems: 1. These folders are not deleted automatically 2. if the folder contains big files (1 GB of DVB-S video recordings...) the /tmp folder will soon be VERY big and it will need plenty of seconds for the copy operations... Reproducible: Always Steps to Reproduce: settings->configure dolphin...->general->show tooltip 1. trash a folder with some files in it. (the bigger the files, the better the effect: try 1GB) 2. go to trash:/ (essentially for this bug report) 3. move mouse over the trashed folder until tooltip pops up (repeat this step for a bigger effect) 4. go to /tmp/kde-<user> 5. you will see the trashed folder as "dolphin<letters&numbers>.tmp" and it contains are the files. Expected Results: Tooltip should never copy folders or files to /tmp. But it did when used in trash:/
Thanks for the bug report. Copying the file to /tmp is not done by Dolphin itself, but by KIO::PreviewJob, the class that generates the preview image in the tool tip. You can see that by going to trash:/ and then enabling previews - the folder will be copied to /tmp even if no tool tip is shown at all. I'm not sure though how easy it is to change this behavior.
I can see that they are now (with KDE Frameworks 5.47) indeed removed automatically from /tmp when you stop hovering over them. It's really quite neat.