[Usability] Copy/double click feedback

[lorenzo <l bolzani gmail com>]

Hi all,
recently I noticed what I consider a couple UI defect present on all OS I know.
Both are about providing user feedback.

The first one concerns the copy operation. This operation provides no
feedback at all to user.
You cannot know if you pressed correctly the keyboard shortcut, if the
object can be copied and so on.
I often prefer to use a cut followed by a paste/undo to be sure of the
operation.
The system should provide some feedback for this: the selected part
could blink a couple of times and for the failure of the operation a
red border could blink, or something like that.

The second one is about double click.
You cannot know if you did the two clicks or a double-click. If you
are too slow you just stay there staring at the selected icon. This is
sometime a problem for non-expert users.
A tipical scenario is application launch from desktop icon: you cannot
know if the app is starting so the app has to provide a splash screen
to give feedback to the user when the real problem is the double click
operation (a splash screen is of course useful for very long
startups).

Let me know what you think about this.

Bye

Lorenzo