on-focus in editor-canvas%

Called when a window receives or loses the keyboard focus. If the argument is #t, the keyboard focus was received, otherwise it was lost.

Note that under X, keyboard focus can move to the menu bar when the user is selecting a menu item.

• (send an-editor-canvas on-focus on?) -> void
     on? : boolean

  Enables or disables the caret in the display's editor, if there is one.