using UnityEngine;
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using System.Collections;
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namespace EnhancedUI.EnhancedScroller
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{
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/// <summary>
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/// All scripts that handle the scroller's callbacks should inherit from this interface
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/// </summary>
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public interface IEnhancedScrollerDelegate
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{
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/// <summary>
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/// Gets the number of cells in a list of data
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/// </summary>
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/// <param name="scroller"></param>
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/// <returns></returns>
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int GetNumberOfCells(EnhancedScroller scroller);//得到Scroll里面CellVeiw的总数目
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/// <summary>
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/// Gets the size of a cell view given the index of the data set.
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/// This allows you to have different sized cells
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/// </summary>
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/// <param name="scroller"></param>
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/// <param name="dataIndex"></param>
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/// <returns></returns>
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float GetCellViewSize(EnhancedScroller scroller, int dataIndex);//得到某个dataIndex的size（因为有可能会存在不同的CellVeiw）
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/// <summary>
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/// Gets the cell view that should be used for the data index. Your implementation
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/// of this function should request a new cell from the scroller so that it can
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/// properly recycle old cells.
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/// </summary>
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/// <param name="scroller"></param>
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/// <param name="dataIndex"></param>
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/// <param name="cellIndex"></param>
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/// <returns></returns>
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EnhancedScrollerCellView GetCellView(EnhancedScroller scroller, int dataIndex, int cellIndex);
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/*
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* 用于得到（或从循环集合中取，或实例化）一个CellView并取其CellView对象
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注意这里返回的是CellView的父类型，CellVeiw是要自己来写的,这样就可以通过重写父类的虚方法实现多态
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*/
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/*要想使用这个插件，需要我们添加两个类，
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* 1）一个类继承自EnHancedScrollerCellView，用于保存单个CellView的相关信息
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* 2）另一个类实现这个接口，用于控制整个Scroll，并提供给外界一些相关信息（总的CellView数目，每个CellView的size等）
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* 其中，GetCellView()方法在实现的时候直接调用 EnhancedScroller类中的GetCellView（）方法来进行实现就可以了
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* 这两个类也可根据自己的需要进行扩展
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*/
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void OnRebuildComplete();
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}
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}
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