on-default-char

Called by on-local-char when the event is not handled by a caret-owning snip or by the keymap.

• (send a-text on-default-char event) -> void
      event : key-event% object

  Handles the following:

  • Delete and Backspace -- calls delete.
  • The arrow keys, Page Up, Page Down, Home, and End (including shfted versions) -- moves the selection position with move-position.
  • Any other character in the range (integer->char 32) to (integer->char 255) -- inserts the character into the editor.