onSecondaryLongPressStart property Null safety

GestureLongPressStartCallback? onSecondaryLongPressStart
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Called when a long press gesture by a secondary button has been recognized.

This is equivalent to (and is called immediately before) onSecondaryLongPress. The only difference between the two is that this callback contains details of the position at which the pointer initially contacted the screen, whereas onSecondaryLongPress does not.

See also:


GestureLongPressStartCallback? onSecondaryLongPressStart;