I have dired and dired+ setup for viewing directory listings and use it as my file-manager for moving / copying files. Currently dired lists '0' as the size for all the subdirectories in any directory.
I would like to have dired calculate and display folder sizes. I would like this to be bound to a keystroke/mouse-click since I don't want dired to do this on every folder in every buffer.
As of now, I have "open in explorer" (w32-shell-execute in windows and gnome-open in gnome) bound to "O" from which I use Alt+Enter to calculate the subdirectory size.