DismissibleUpdateEvent 继承自： Event['Dismissible']

Event payload emitted while a dismiss gesture is in progress.

属性

名称	类型	默认值	说明
direction	DismissDirection	required	Direction of the current drag gesture.
progress	float	required	Drag progress from 0.0 to 1.0 relative to dismissal threshold.
reached	bool	required	Whether the dismiss threshold is currently reached.
previous_reached	bool	required	Whether threshold was reached on the previous update event.