delete

The content of an editor can be changed by the system in response to other method calls, and such changes do not go through this method; use on-delete to monitor content deletion changes.

• (send a-text delete start end scroll-ok?) -> void
      start : exact non-negative integer or 'start
      end = 'back : exact non-negative integer or 'back
      scroll-ok? = #t : boolean

  Deletes the specified range in the editor. If start is 'start, then the starting selection position is used; if end is 'back, then only the character preceding start is deleted. If scroll-ok? is not #f and start is the same as the current caret position, then the editor's display may be scrolled to show the new selection position.

  
  

• (send a-text delete) -> void

  Deletes the currently selected text.