123 lines
4.4 KiB
C#
123 lines
4.4 KiB
C#
using System.Collections;
|
|
using UnityEngine;
|
|
|
|
namespace FirstVillain.ScrollView
|
|
{
|
|
public class VerticalInfiniteScrollView : InfiniteScrollView
|
|
{
|
|
[SerializeField] private bool _isAtTop = true;
|
|
[SerializeField] private bool _isAtBottom = true;
|
|
|
|
public override void Initialize()
|
|
{
|
|
base.Initialize();
|
|
_isAtTop = true;
|
|
_isAtBottom = true;
|
|
}
|
|
|
|
protected override void OnValueChanged(Vector2 normalizedPosition)
|
|
{
|
|
if (_dataList.Count == 0)
|
|
return;
|
|
float viewportInterval = _scrollRect.viewport.rect.height;
|
|
float minViewport = _scrollRect.content.anchoredPosition.y;
|
|
Vector2 viewportRange = new Vector2(minViewport - _extendVisibleRange, minViewport + viewportInterval + _extendVisibleRange);
|
|
float contentHeight = _padding.x;
|
|
for (int i = 0; i < _dataList.Count; i++)
|
|
{
|
|
var visibleRange = new Vector2(contentHeight, contentHeight + _dataList[i].CellSize.y);
|
|
if (visibleRange.y < viewportRange.x || visibleRange.x > viewportRange.y)
|
|
{
|
|
RecycleCell(i);
|
|
}
|
|
contentHeight += _dataList[i].CellSize.y + _spacing;
|
|
}
|
|
contentHeight = _padding.x;
|
|
for (int i = 0; i < _dataList.Count; i++)
|
|
{
|
|
var visibleRange = new Vector2(contentHeight, contentHeight + _dataList[i].CellSize.y);
|
|
if (visibleRange.y >= viewportRange.x && visibleRange.x <= viewportRange.y)
|
|
{
|
|
SetupCell(i, new Vector2(0, -contentHeight));
|
|
if (visibleRange.y >= viewportRange.x)
|
|
_cellList[i].transform.SetAsLastSibling();
|
|
else
|
|
_cellList[i].transform.SetAsFirstSibling();
|
|
}
|
|
contentHeight += _dataList[i].CellSize.y + _spacing;
|
|
}
|
|
if (_scrollRect.content.sizeDelta.y > viewportInterval)
|
|
{
|
|
_isAtTop = viewportRange.x + _extendVisibleRange <= 0.001f;
|
|
_isAtBottom = _scrollRect.content.sizeDelta.y - viewportRange.y + _extendVisibleRange <= 0.001f;
|
|
}
|
|
else
|
|
{
|
|
_isAtTop = true;
|
|
_isAtBottom = true;
|
|
}
|
|
}
|
|
|
|
public sealed override void Refresh()
|
|
{
|
|
if (!IsInitialized)
|
|
{
|
|
Initialize();
|
|
}
|
|
if (_scrollRect.viewport.rect.height == 0)
|
|
StartCoroutine(DelayToRefresh());
|
|
else
|
|
DoRefresh();
|
|
}
|
|
|
|
private void DoRefresh()
|
|
{
|
|
float height = _padding.x;
|
|
for (int i = 0; i < _dataList.Count; i++)
|
|
{
|
|
height += _dataList[i].CellSize.y + _spacing;
|
|
}
|
|
for (int i = 0; i < _cellList.Count; i++)
|
|
{
|
|
RecycleCell(i);
|
|
}
|
|
height += _padding.y;
|
|
_scrollRect.content.sizeDelta = new Vector2(_scrollRect.content.sizeDelta.x, height);
|
|
OnValueChanged(_scrollRect.normalizedPosition);
|
|
OnRefresh?.Invoke();
|
|
}
|
|
|
|
private IEnumerator DelayToRefresh()
|
|
{
|
|
yield return _waitEndOfFrame;
|
|
DoRefresh();
|
|
}
|
|
|
|
public override void Snap(int index, float duration)
|
|
{
|
|
if (!IsInitialized)
|
|
return;
|
|
if (index >= _dataList.Count)
|
|
return;
|
|
if (_scrollRect.content.rect.height < _scrollRect.viewport.rect.height)
|
|
return;
|
|
float height = _padding.x;
|
|
for (int i = 0; i < index; i++)
|
|
{
|
|
height += _dataList[i].CellSize.y + _spacing;
|
|
}
|
|
height = Mathf.Min(_scrollRect.content.rect.height - _scrollRect.viewport.rect.height, height);
|
|
if (_scrollRect.content.anchoredPosition.y != height)
|
|
{
|
|
DoSnapping(new Vector2(0, height), duration);
|
|
}
|
|
}
|
|
|
|
public override void Remove(int index)
|
|
{
|
|
var removeCell = _dataList[index];
|
|
base.Remove(index);
|
|
_scrollRect.content.anchoredPosition -= new Vector2(0, removeCell.CellSize.y + _spacing);
|
|
}
|
|
}
|
|
} |