# OHOS::ListScrollListener - [Overview](#section669334094165634) - [Summary](#section1535020238165634) - [Public Member Functions](#pub-methods) ## **Overview** **Related Modules:** [Graphic](Graphic.md) **Description:** Represents a listener that contains a callback to be invoked when the scroll state changes or when a new child view is selected at the preset position as this list scrolls. The scroll state can be \{**\} or SCROLL\_STATE\_MOVE\}. ** **Since:** 1.0 **Version:** 1.0 ## **Summary** ## Public Member Functions

Function	Description
ListScrollListener ()	A constructor used to create a ListScrollListener instance with the default state SCROLL_STATE_STOP.
~ListScrollListener ()	virtual A destructor used to delete the ListScrollListener instance.
OnScrollStart (int16_t index, UIView *view)	virtual void Called when a scroll starts.
OnScrollEnd (int16_t index, UIView *view)	virtual void Called when a scroll ends.
OnItemSelected (int16_t index, UIView *view)	virtual void Called when a new child view is selected at the preset position as this list scrolls. For details about how to set the position, see SetSelectPosition.
GetScrollState () const	uint8_t Obtains the scroll state of this list.
operator new (size_t size)	void * Overrides the new function.
operator delete (void *p)	void Overrides the delete function.