onTertiaryLongPressDown property Null safety

GestureLongPressDownCallback? onTertiaryLongPressDown

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:


final GestureLongPressDownCallback? onTertiaryLongPressDown;