on-tab-in

Called when the keyboard focus enters the canvas via keyboard navigation events. The on-focus method is also called, as usual for a focus change. When the keyboard focus leaves a canvas due to a navgation event, only on-focus is called.

See also accept-tab-focus in canvas% and on-traverse-char in top-level-window<%> .

• (send a-canvas on-tab-in) -> void

  Does nothing.