using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using System;
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using Cysharp.Threading.Tasks;
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using System.Diagnostics;
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[DisallowMultipleComponent]
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public class CyclicScroll : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
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{
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[SerializeField] RectTransform m_Content;
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public RectTransform content { get { return m_Content; } }
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[SerializeField] protected BoundOffset m_BoundOffset;
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[SerializeField] protected Vector2 m_CellSize = new Vector2(100, 100);
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public Vector2 cellSize { get { return m_CellSize; } }
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[SerializeField] protected Vector2 m_Spacing;
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public Vector2 spacing { get { return m_Spacing; } }
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[SerializeField] Align m_Align = Align.Top;
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public Align align { get { return m_Align; } }
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[SerializeField] bool m_ElasticityOn = true;
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public bool elasticityOn { get { return m_ElasticityOn; } }
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[SerializeField] private float m_Elasticity = 0.1f;
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public float elasticity { get { return m_Elasticity; } }
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[SerializeField] private float m_DecelerationRate = 0.135f;
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public float decelerationRate { get { return m_DecelerationRate; } }
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[SerializeField] string m_ChildPrefabName = string.Empty;
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[SerializeField] string m_ChildDisplayName = string.Empty;
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[SerializeField] int m_ChildCount = 5;
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public float normalizedPosition {
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get {
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if (content == null)
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{
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return 0f;
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}
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var offset = (dataMaxOffset - dataMinOffset);
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switch (align)
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{
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case Align.Top:
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case Align.Bottom:
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return Mathf.Clamp01(Mathf.Abs((content.anchoredPosition.y - dataMinOffset.y) / offset.y));
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case Align.Left:
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case Align.Right:
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return Mathf.Clamp01(Mathf.Abs((content.anchoredPosition.x - dataMinOffset.x) / offset.x));
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default:
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return 0f;
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}
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}
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set {
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if (content == null)
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{
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return;
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}
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value = Mathf.Clamp01(value);
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var normalize = 0f;
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var offset = (dataMaxOffset - dataMinOffset);
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switch (align)
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{
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case Align.Top:
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case Align.Bottom:
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normalize = (content.anchoredPosition.y - dataMinOffset.y) / offset.y;
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if (Mathf.Abs(normalize - value) > 0.0001f)
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{
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targetOffset = dataMinOffset + new Vector2(0, dataMaxOffset.y * value);
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velocity = 0f;
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autoLerp = true;
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refAutoLerpPosition = Vector2.zero;
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}
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break;
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case Align.Left:
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case Align.Right:
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normalize = (content.anchoredPosition.x - dataMinOffset.x) / offset.x;
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if (Mathf.Abs(normalize - value) > 0.0001f)
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{
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targetOffset = dataMinOffset + new Vector2(dataMaxOffset.x * value, 0);
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velocity = 0f;
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autoLerp = true;
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refAutoLerpPosition = Vector2.zero;
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}
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break;
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}
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}
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}
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protected Vector2 dataMaxOffset = Vector2.zero;
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protected Vector2 dataMinOffset = Vector2.zero;
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public bool autoLerp { get; private set; }
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Vector2 targetOffset = Vector2.zero;
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Vector2 refAutoLerpPosition = Vector2.zero;
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protected IList datas;
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protected List<ScrollItem> infiniteItems = new List<ScrollItem>();
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List<ScrollItem> tempList = new List<ScrollItem>();
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Vector2 startMousePosition = Vector2.zero;
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Vector2 startContentPosition = Vector2.zero;
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Vector2 prevPosition = Vector2.zero;
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protected float velocity = 0f;
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protected bool dragging = false;
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public int dataCount {
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get {
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return datas == null ? 0 : datas.Count;
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}
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}
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bool moveNextable {
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get {
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return hostIndex < dataCount - 1;
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}
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}
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bool moveLastable {
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get {
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return preIndex > 0;
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}
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}
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public RectTransform rectTransform { get { return this.transform as RectTransform; } }
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private Vector2 maxOffset { get { return rectTransform.GetMaxReferencePosition(rectTransform); } }
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private Vector2 minOffset { get { return rectTransform.GetMinReferencePosition(rectTransform); } }
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protected int preIndex {
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get; set;
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}
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protected int hostIndex {
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get; set;
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}
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public void LuaInit(int[] indexs, bool stepByStep)
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{
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Init(new List<int>(indexs), stepByStep);
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}
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public virtual void Init<T>(List<T> _datas, bool _stepByStep = false)
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{
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if (_datas == null)
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{
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this.SetActive(false);
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return;
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}
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datas = _datas;
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ReArrange();
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FillBatchData(0);
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if (_stepByStep)
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{
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for (int i = 0; i < infiniteItems.Count; i++)
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{
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var infiniteItem = infiniteItems[i];
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if (infiniteItem != null)
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{
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infiniteItem.SetActive(false);
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}
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}
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}
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this.SetActive(true);
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dataMinOffset = content.anchoredPosition;
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var totalOffset = dataCount == 0 ? Vector2.zero : cellSize * dataCount + spacing * (dataCount - 1)
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+ new Vector2(m_BoundOffset.left + m_BoundOffset.right, m_BoundOffset.top + m_BoundOffset.bottom);
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var longer = Mathf.Abs(totalOffset.x) > Mathf.Abs(rectTransform.rect.width);
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var higher = Mathf.Abs(totalOffset.y) > Mathf.Abs(rectTransform.rect.height);
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switch (align)
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{
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case Align.Left:
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dataMaxOffset = longer ? dataMinOffset - new Vector2(totalOffset.x - rectTransform.rect.width, 0) : dataMinOffset;
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break;
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case Align.Right:
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dataMaxOffset = longer ? dataMinOffset + new Vector2(totalOffset.x - rectTransform.rect.width, 0) : dataMinOffset;
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break;
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case Align.Top:
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dataMaxOffset = higher ? dataMinOffset + new Vector2(0, totalOffset.y - rectTransform.rect.height) : dataMinOffset;
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break;
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case Align.Bottom:
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dataMaxOffset = higher ? dataMinOffset - new Vector2(0, totalOffset.y - rectTransform.rect.height) : dataMinOffset;
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break;
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}
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if (_stepByStep)
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{
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Co_StepByStepAppear();
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// StartCoroutine("Co_StepByStepAppear");
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}
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}
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public void Dispose()
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{
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velocity = 0f;
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StopAllCoroutines();
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for (int i = 0; i < infiniteItems.Count; i++)
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{
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var infiniteItem = infiniteItems[i];
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if (infiniteItem != null)
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{
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infiniteItem.Dispose();
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}
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}
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}
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public void HideAll()
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{
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StopAllCoroutines();
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for (int i = 0; i < content.childCount; i++)
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{
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content.GetChild(i).SetActive(false);
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}
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}
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private async UniTask Co_StepByStepAppear()
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{
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for (int i = 0; i < infiniteItems.Count; i++)
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{
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var infiniteItem = infiniteItems[i];
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if (infiniteItem != null && i < datas.Count)
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{
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infiniteItem.SetActive(true);
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infiniteItem.OpeningShow();
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await UniTask.Delay(1000);
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}
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}
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}
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public void MoveToCenter(int _dataIndex)
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{
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if (_dataIndex < 0 || _dataIndex >= dataCount)
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{
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return;
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}
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switch (align)
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{
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case Align.Left:
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var leftOffsetX = Mathf.Clamp(m_BoundOffset.left + (_dataIndex + 0.5f) * cellSize.x + _dataIndex * spacing.x - rectTransform.rect.width * 0.5f, 0, Mathf.Abs(dataMaxOffset.x));
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targetOffset = new Vector2(dataMinOffset.x - leftOffsetX, 0);
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break;
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case Align.Right:
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var rightOffsetX = Mathf.Clamp(m_BoundOffset.right + (_dataIndex + 0.5f) * cellSize.x + _dataIndex * spacing.x - rectTransform.rect.width * 0.5f, 0, Mathf.Abs(dataMaxOffset.x));
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targetOffset = new Vector2(dataMinOffset.x + rightOffsetX, 0);
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break;
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case Align.Top:
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var topOffsetY = Mathf.Clamp(m_BoundOffset.top + (_dataIndex + 0.5f) * cellSize.y + _dataIndex * spacing.y - rectTransform.rect.height * 0.5f, 0, Mathf.Abs(dataMaxOffset.y));
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targetOffset = new Vector2(0, dataMinOffset.y + topOffsetY);
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break;
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case Align.Bottom:
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var bottomOffsetY = Mathf.Clamp(m_BoundOffset.bottom + (_dataIndex + 0.5f) * cellSize.y + _dataIndex * spacing.y - rectTransform.rect.height * 0.5f, 0, Mathf.Abs(dataMaxOffset.y));
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targetOffset = new Vector2(0, dataMinOffset.y - bottomOffsetY);
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break;
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}
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autoLerp = true;
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}
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#region Drag Process
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public void OnBeginDrag(PointerEventData eventData)
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{
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if (autoLerp || eventData.button != PointerEventData.InputButton.Left)
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{
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return;
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}
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startMousePosition = Vector2.zero;
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RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, eventData.position, eventData.pressEventCamera, out startMousePosition);
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prevPosition = startContentPosition = content.anchoredPosition;
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velocity = 0f;
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dragging = true;
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}
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public void OnDrag(PointerEventData eventData)
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{
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// if (NewBieCenter.Instance.inGuiding)
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// {
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// return;
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// }
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if (autoLerp || eventData.button != PointerEventData.InputButton.Left)
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{
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return;
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}
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var localMouse = new Vector2();
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if (RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, eventData.position, eventData.pressEventCamera, out localMouse))
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{
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var pointerDelta = localMouse - startMousePosition;
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var position = startContentPosition + pointerDelta;
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SetContentAnchoredPosition(position, align);
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}
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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if (autoLerp || eventData.button != PointerEventData.InputButton.Left)
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{
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return;
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}
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dragging = false;
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}
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#endregion
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private void Update()
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{
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if (autoLerp && Vector2.Distance(content.anchoredPosition, targetOffset) > 0.1f)
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{
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var newPosition = Vector2.SmoothDamp(content.anchoredPosition, targetOffset, ref refAutoLerpPosition, m_Elasticity, Mathf.Infinity, Time.unscaledDeltaTime);
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SetContentAnchoredPosition(newPosition, align);
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}
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else
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{
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autoLerp = false;
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}
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}
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protected virtual void LateUpdate()
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{
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if (content == null)
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{
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return;
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}
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var deltaTime = Time.unscaledDeltaTime;
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var offset = CalculateOffset(align);
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if (!dragging && (velocity != 0f || Vector2.SqrMagnitude(offset - Vector2.zero) > 0.1f))
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{
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Vector2 position = content.anchoredPosition;
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if (Vector2.SqrMagnitude(offset - Vector2.zero) > 0.1f)
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{
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float speed = velocity;
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switch (align)
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{
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case Align.Left:
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case Align.Right:
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position[0] = Mathf.SmoothDamp(content.anchoredPosition[0], content.anchoredPosition[0] - offset.x, ref speed, m_Elasticity, Mathf.Infinity, deltaTime);
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break;
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case Align.Bottom:
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case Align.Top:
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position[1] = Mathf.SmoothDamp(content.anchoredPosition[1], content.anchoredPosition[1] - offset.y, ref speed, m_Elasticity, Mathf.Infinity, deltaTime);
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break;
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}
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if (Mathf.Abs(speed) < 1)
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{
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speed = 0f;
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}
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velocity = speed;
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}
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else
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{
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velocity *= Mathf.Pow(m_DecelerationRate, deltaTime);
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if (Mathf.Abs(velocity) < 50)
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{
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velocity = 0;
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}
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switch (align)
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{
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case Align.Left:
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case Align.Right:
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position[0] += velocity * deltaTime;
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break;
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case Align.Bottom:
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case Align.Top:
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position[1] += velocity * deltaTime;
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break;
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}
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}
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SetContentAnchoredPosition(position, align);
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}
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if (dragging /*&& content.anchoredPosition != prevPosition*/)
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{
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var newVelocity = 0f;
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switch (align)
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{
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case Align.Left:
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case Align.Right:
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newVelocity = (content.anchoredPosition[0] - prevPosition[0]) / deltaTime;
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break;
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case Align.Bottom:
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case Align.Top:
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newVelocity = (content.anchoredPosition[1] - prevPosition[1]) / deltaTime;
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break;
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}
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velocity = Mathf.Lerp(velocity, newVelocity, deltaTime * 10);
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prevPosition = content.anchoredPosition;
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}
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}
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protected virtual void ProcessMoveNext()
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{
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ScrollItem lastRect = null;
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ScrollItem item = null;
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tempList.Clear();
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for (int i = 0; i < infiniteItems.Count; i++)
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{
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tempList.Add(infiniteItems[i]);
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}
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if (tempList.Count <= 0)
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{
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return;
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}
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lastRect = tempList[tempList.Count - 1];
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for (int i = 0; i < tempList.Count; i++)
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{
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item = tempList[i];
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var able = moveNextable && TestMoveNext(align, item);
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if (able)
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{
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infiniteItems.Remove(item);
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infiniteItems.Add(item);
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var offset = CalculateElementOffset(align);
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item.rectTransform.anchoredPosition = lastRect.rectTransform.anchoredPosition + offset;
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lastRect = item;
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hostIndex++;
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preIndex++;
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item.Dispose();
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item.LuaDispose();
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item.Display(datas[hostIndex]);
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item.LuaDisplay(hostIndex);
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}
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else
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{
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break;
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}
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}
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}
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protected virtual void ProcessMoveLast()
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{
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ScrollItem firstRect = null;
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ScrollItem item = null;
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tempList.Clear();
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for (int i = 0; i < infiniteItems.Count; i++)
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{
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tempList.Add(infiniteItems[i]);
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}
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firstRect = tempList[0];
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for (int i = tempList.Count - 1; i >= 0; i--)
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{
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item = tempList[i];
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var able = moveLastable && TestMoveLast(align, item);
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if (able)
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{
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infiniteItems.Remove(item);
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infiniteItems.Insert(0, item);
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var offset = CalculateElementOffset(align);
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item.rectTransform.anchoredPosition = firstRect.rectTransform.anchoredPosition - offset;
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firstRect = item;
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hostIndex--;
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preIndex--;
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item.Dispose();
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item.LuaDispose();
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item.Display(datas[preIndex]);
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item.LuaDisplay(preIndex);
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}
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else
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{
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break;
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}
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}
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}
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private void SetContentAnchoredPosition(Vector2 _position, Align _align)
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{
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if (_position == content.anchoredPosition)
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{
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return;
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}
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if (!elasticityOn)
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{
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_position.y = Mathf.Clamp(_position.y, dataMinOffset.y, dataMaxOffset.y);
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_position.x = Mathf.Clamp(_position.x, dataMinOffset.x, dataMaxOffset.x);
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}
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var offset = _position - content.anchoredPosition;
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switch (_align)
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{
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case Align.Left:
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case Align.Right:
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_position[1] = content.anchoredPosition[1];
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content.anchoredPosition = _position;
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break;
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case Align.Top:
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case Align.Bottom:
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_position[0] = content.anchoredPosition[0];
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content.anchoredPosition = _position;
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break;
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}
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var moveNext = (_align == Align.Left && offset.x < 0f) || (_align == Align.Right && offset.x > 0f) ||
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(_align == Align.Top && offset.y > 0f) || (_align == Align.Bottom && offset.y < 0f);
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if (moveNext)
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{
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ProcessMoveNext();
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}
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else
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{
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ProcessMoveLast();
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}
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}
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private Vector2 CalculateOffset(Align _align)
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{
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var offset = Vector2.zero;
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switch (_align)
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{
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case Align.Left:
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if (content.anchoredPosition.x > dataMinOffset.x)
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{
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offset = content.anchoredPosition - dataMinOffset;
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}
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else if (content.anchoredPosition.x < dataMaxOffset.x)
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{
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offset = content.anchoredPosition - dataMaxOffset;
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}
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break;
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case Align.Right:
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if (content.anchoredPosition.x < dataMinOffset.x)
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{
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offset = content.anchoredPosition - dataMinOffset;
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}
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else if (content.anchoredPosition.x > dataMaxOffset.x)
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{
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offset = content.anchoredPosition - dataMaxOffset;
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}
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break;
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case Align.Bottom:
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if (content.anchoredPosition.y > dataMinOffset.y)
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{
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offset = content.anchoredPosition - dataMinOffset;
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}
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else if (content.anchoredPosition.y < dataMaxOffset.y)
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{
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offset = content.anchoredPosition - dataMaxOffset;
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}
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break;
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case Align.Top:
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if (content.anchoredPosition.y < dataMinOffset.y)
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{
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offset = content.anchoredPosition - dataMinOffset;
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}
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else if (content.anchoredPosition.y > dataMaxOffset.y)
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{
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offset = content.anchoredPosition - dataMaxOffset;
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}
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break;
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}
|
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return offset;
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}
|
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[ContextMenu("Arrange")]
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public virtual void ReArrange()
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{
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velocity = 0f;
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autoLerp = false;
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CreateElements();
|
ElementsMatch();
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Arrange(align);
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}
|
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private void CreateElements()
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{
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var items = this.content.GetComponentsInChildren<ScrollItem>(true);
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if (items.Length < m_ChildCount)
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{
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var dif = m_ChildCount - items.Length;
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if (!string.IsNullOrEmpty(m_ChildPrefabName) && !string.IsNullOrEmpty(m_ChildDisplayName))
|
{
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for (var i = 0; i < dif; i++)
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{
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var instance = UIUtility.CreateWidget(m_ChildPrefabName, m_ChildDisplayName);
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instance.transform.SetParentEx(this.m_Content, Vector3.zero, Quaternion.identity, Vector3.one);
|
}
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}
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}
|
}
|
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private void Arrange(Align _align)
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{
|
var head = infiniteItems[0];
|
|
var offset1 = Vector2.zero;
|
switch (_align)
|
{
|
case Align.Left:
|
offset1 = new Vector2(-content.rect.width * 0.5f + head.rectTransform.rect.width * 0.5f + m_BoundOffset.left, 0);
|
break;
|
case Align.Right:
|
offset1 = new Vector2(content.rect.width * 0.5f - head.rectTransform.rect.width * 0.5f - m_BoundOffset.right, 0);
|
break;
|
case Align.Top:
|
offset1 = new Vector2(0f, content.rect.height * 0.5f - head.rectTransform.rect.height * 0.5f - m_BoundOffset.top);
|
break;
|
case Align.Bottom:
|
offset1 = new Vector2(0f, -content.rect.height * 0.5f + head.rectTransform.rect.height * 0.5f + m_BoundOffset.bottom);
|
break;
|
}
|
|
head.rectTransform.anchoredPosition = content.anchoredPosition + offset1;
|
|
var offset2 = CalculateElementOffset(_align);
|
for (int i = 1; i < infiniteItems.Count; i++)
|
{
|
var item = infiniteItems[i];
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item.rectTransform.anchoredPosition = head.rectTransform.anchoredPosition + offset2 * i;
|
}
|
}
|
|
private void ElementsMatch()
|
{
|
if (content == null)
|
{
|
UnityEngine.Debug.Log("Content 不能为空！");
|
return;
|
}
|
|
infiniteItems.Clear();
|
for (int i = 0; i < content.childCount; i++)
|
{
|
var infiniteItem = content.GetChild(i).GetComponent<ScrollItem>();
|
if (infiniteItem != null)
|
{
|
infiniteItems.Add(infiniteItem);
|
infiniteItem.rectTransform.sizeDelta = cellSize;
|
infiniteItem.rectTransform.anchorMax = Vector2.one * 0.5f;
|
infiniteItem.rectTransform.anchorMin = Vector2.one * 0.5f;
|
infiniteItem.rectTransform.pivot = Vector2.one * 0.5f;
|
}
|
}
|
|
content.anchorMax = content.anchorMin = content.pivot = Vector2.one * 0.5f;
|
content.sizeDelta = rectTransform.sizeDelta;
|
content.anchoredPosition = Vector2.zero;
|
}
|
|
private void FillBatchData(int _startIndex)
|
{
|
int min = Mathf.Min(infiniteItems.Count, dataCount);
|
preIndex = Mathf.Clamp(_startIndex, 0, dataCount - min);
|
hostIndex = preIndex + min - 1;
|
|
for (int i = 0; i < infiniteItems.Count; i++)
|
{
|
var item = infiniteItems[i];
|
if (i <= hostIndex - preIndex)
|
{
|
item.SetActive(true);
|
item.Display(datas[preIndex + i]);
|
item.LuaDisplay(preIndex + i);
|
}
|
else
|
{
|
item.SetActive(false);
|
item.Dispose();
|
item.LuaDispose();
|
}
|
}
|
}
|
|
private Vector2 CalculateElementOffset(Align _align)
|
{
|
switch (_align)
|
{
|
case Align.Left:
|
return new Vector2(cellSize.x + spacing.x, 0);
|
case Align.Right:
|
return new Vector2(-cellSize.x - spacing.x, 0);
|
case Align.Top:
|
return new Vector2(0, -cellSize.y - spacing.y);
|
case Align.Bottom:
|
return new Vector2(0, cellSize.y + spacing.y);
|
default:
|
return Vector2.zero;
|
}
|
}
|
|
private bool TestMoveNext(Align _align, ScrollItem _item)
|
{
|
var itemMinPosition = _item.rectTransform.GetMinReferencePosition(rectTransform);
|
var itemMaxPosition = _item.rectTransform.GetMaxReferencePosition(rectTransform);
|
|
switch (_align)
|
{
|
case Align.Left:
|
return itemMaxPosition.x < minOffset.x;
|
case Align.Bottom:
|
return itemMaxPosition.y < minOffset.y;
|
case Align.Right:
|
return itemMinPosition.x > maxOffset.x;
|
case Align.Top:
|
return itemMinPosition.y > maxOffset.y;
|
default:
|
return false;
|
}
|
}
|
|
private bool TestMoveLast(Align _align, ScrollItem _item)
|
{
|
var itemMinPosition = _item.rectTransform.GetMinReferencePosition(rectTransform);
|
var itemMaxPosition = _item.rectTransform.GetMaxReferencePosition(rectTransform);
|
|
switch (_align)
|
{
|
case Align.Left:
|
return itemMinPosition.x > maxOffset.x;
|
case Align.Bottom:
|
return itemMinPosition.y > maxOffset.y;
|
case Align.Right:
|
return itemMaxPosition.x < minOffset.x;
|
case Align.Top:
|
return itemMaxPosition.y < minOffset.y;
|
default:
|
return false;
|
}
|
}
|
|
public enum Align
|
{
|
Left,
|
Right,
|
Top,
|
Bottom,
|
}
|
|
[Serializable]
|
public struct BoundOffset
|
{
|
public float left;
|
public float right;
|
public float top;
|
public float bottom;
|
}
|
|
}
|
