onTertiaryLongPressDown property

The pointer has contacted the screen with a tertiary button, which might be the start of a long-press.

This triggers after the pointer down event.

If the user completes the long-press, and this gesture wins, onTertiaryLongPressStart will be called after this callback. Otherwise, onTertiaryLongPressCancel will be called after this callback.

See also:

• kTertiaryButton, the button this callback responds to.
• onLongPressDown, a similar callback but for a primary button.
• onSecondaryLongPressDown, a similar callback but for a secondary button.
• LongPressGestureRecognizer.onTertiaryLongPressDown, which exposes this callback at the gesture layer.