onTertiaryTapDown property

A pointer has contacted the screen at a particular location with a tertiary button, which might be the start of a tertiary tap.

This triggers after the down event, once a short timeout (deadline) has elapsed, or once the gestures has won the arena, whichever comes first.

If this recognizer doesn't win the arena, onTertiaryTapCancel is called next. Otherwise, onTertiaryTapUp is called next.

See also:

• kTertiaryButton, the button this callback responds to.
• onTapDown, a similar callback but for a primary button.
• onSecondaryTapDown, a similar callback but for a secondary button.
• TapDownDetails, which is passed as an argument to this callback.
• GestureDetector.onTertiaryTapDown, which exposes this callback.