123 lines
4.6 KiB
C#
123 lines
4.6 KiB
C#
using System.Collections;
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using UnityEngine;
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namespace FirstVillain.ScrollView
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{
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public class VerticalGridInfiniteScrollView : InfiniteScrollView
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{
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[SerializeField] private bool _isAtTop = true;
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[SerializeField] private bool _isAtBottom = true;
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[SerializeField] private int _columeCount = 1;
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protected override void OnValueChanged(Vector2 normalizedPosition)
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{
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if (_columeCount <= 0)
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{
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_columeCount = 1;
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}
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float viewportInterval = _scrollRect.viewport.rect.height;
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float minViewport = _scrollRect.content.anchoredPosition.y;
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Vector2 viewportRange = new Vector2(minViewport, minViewport + viewportInterval);
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float contentHeight = _padding.x;
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for (int i = 0; i < _dataList.Count; i += _columeCount)
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{
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for (int j = 0; j < _columeCount; j++)
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{
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int index = i + j;
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if (index >= _dataList.Count)
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break;
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var visibleRange = new Vector2(contentHeight, contentHeight + _dataList[index].CellSize.y);
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if (visibleRange.y < viewportRange.x || visibleRange.x > viewportRange.y)
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{
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RecycleCell(index);
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}
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}
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contentHeight += _dataList[i].CellSize.y + _spacing;
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}
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contentHeight = _padding.x;
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for (int i = 0; i < _dataList.Count; i += _columeCount)
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{
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for (int j = 0; j < _columeCount; j++)
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{
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int index = i + j;
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if (index >= _dataList.Count)
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break;
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var visibleRange = new Vector2(contentHeight, contentHeight + _dataList[index].CellSize.y);
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if (visibleRange.y >= viewportRange.x && visibleRange.x <= viewportRange.y)
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{
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SetupCell(index, new Vector2((_dataList[index].CellSize.x + _spacing) * j, -contentHeight));
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if (visibleRange.y >= viewportRange.x)
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_cellList[index].transform.SetAsLastSibling();
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else
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_cellList[index].transform.SetAsFirstSibling();
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}
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}
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contentHeight += _dataList[i].CellSize.y + _spacing;
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}
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if (_scrollRect.content.sizeDelta.y > viewportInterval)
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{
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_isAtTop = viewportRange.x + _extendVisibleRange <= _dataList[0].CellSize.y;
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_isAtBottom = _scrollRect.content.sizeDelta.y - viewportRange.y + _extendVisibleRange <= _dataList[_dataList.Count - 1].CellSize.y;
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}
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else
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{
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_isAtTop = true;
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_isAtBottom = true;
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}
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}
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public sealed override void Refresh()
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{
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if (!IsInitialized)
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{
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Initialize();
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}
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if (_scrollRect.viewport.rect.height == 0)
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StartCoroutine(DelayToRefresh());
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else
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DoRefresh();
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}
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private void DoRefresh()
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{
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float height = _padding.x;
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for (int i = 0; i < _dataList.Count; i += _columeCount)
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{
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height += _dataList[i].CellSize.y + _spacing;
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}
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for (int i = 0; i < _cellList.Count; i++)
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{
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RecycleCell(i);
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}
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height += _padding.y;
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_scrollRect.content.sizeDelta = new Vector2(_scrollRect.content.sizeDelta.x, height);
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OnValueChanged(_scrollRect.normalizedPosition);
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OnRefresh?.Invoke();
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}
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private IEnumerator DelayToRefresh()
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{
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yield return _waitEndOfFrame;
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DoRefresh();
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}
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public override void Snap(int index, float duration)
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{
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if (!IsInitialized)
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return;
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if (index >= _dataList.Count)
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return;
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var rowNumber = index / _columeCount;
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var height = _padding.x;
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for (int i = 0; i < rowNumber; i++)
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{
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height += _dataList[i * _columeCount].CellSize.y + _spacing;
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}
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height = Mathf.Min(_scrollRect.content.rect.height - _scrollRect.viewport.rect.height, height);
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if (_scrollRect.content.anchoredPosition.y != height)
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{
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DoSnapping(new Vector2(0, height), duration);
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}
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}
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}
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} |