[EPIC] Shortcut key on diagram

[MrCoder]

There are two types of shortcut keys: Navigation and Operation.

Navigation

Commonly, the active selection is emphasized in a certain way. For instance, the subsequent diagram employs a ring for highlighting.

The sequence of selection should naturally align with the visual arrangement of the elements, enabling user navigation via arrow keys.

Operation

It is a lot more complex. Here are some ideas:

• Start editing: select and start typing or double click
• Complete editing: Enter
• Discard editing: ESC
• Text wrap: Shift_Enter (DSL update needed)
• If participant is in editing mode, clicking Tab will going into next participant and enters editing mode; if that is the last participant, create a new participant