edit-menu:select-all-callback in frame:standard-menus<%>

This method is called when the select-all menu-item of the edit-menu menu is selected.

• (send a-frame:standard-menus edit-menu:select-all-callback item evt) -> void
     item : (instance (derived-from menu-item%))
     evt : (instance control-event%)

  Defaultly bound to:

  (λ (menu evt)
    (let ((edit (get-edit-target-object)))
      (when (and edit (is-a? edit editor<%>))
        (send edit do-edit-operation 'select-all)))
    #t)