possible in Dolphin (I just
tested it!) - and I used it before, but I more like the information pane, and not the two things together....
To view examples when you hover an image file (tooltips), do the following:
In Dolphin, go to Settings >> Configure Dolphin. There appears a new Dolphin Preferences Window.
Select in the left column the tab "General", and in the first tab (Behavior), select "Show Tooltips"
Press 'Apply' and 'OK', and test it out....
Example working on my Laptop:
Also example of settings window:
=> you see the "Show Tooltips" activated