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1557 lines
60 KiB
1557 lines
60 KiB
3 years ago
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace UnityEngine.UI
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{
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[AddComponentMenu("")]
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[DisallowMultipleComponent]
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[RequireComponent(typeof(RectTransform))]
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public abstract class LoopScrollRectBase : UIBehaviour, IInitializePotentialDragHandler, IBeginDragHandler, IEndDragHandler, IDragHandler, IScrollHandler, ICanvasElement, ILayoutElement, ILayoutGroup
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{
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//==========LoopScrollRect==========
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[Tooltip("Prefab Source")]
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public LoopScrollPrefabSource prefabSource = new LoopScrollPrefabSource();
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[Tooltip("Total count, negative means INFINITE mode")]
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public int totalCount;
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[HideInInspector]
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[NonSerialized]
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public LoopScrollSizeHelper sizeHelper = null;
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protected float threshold = 0;
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[Tooltip("Reverse direction for dragging")]
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public bool reverseDirection = false;
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[Tooltip("Rubber scale for outside")]
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public float rubberScale = 1;
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protected int itemTypeStart = 0;
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protected int itemTypeEnd = 0;
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protected abstract float GetSize(RectTransform item, bool includeSpacing = true);
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protected abstract float GetDimension(Vector2 vector);
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protected abstract float GetAbsDimension(Vector2 vector);
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protected abstract Vector2 GetVector(float value);
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protected enum LoopScrollRectDirection
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{
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Vertical,
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Horizontal,
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}
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protected LoopScrollRectDirection direction = LoopScrollRectDirection.Horizontal;
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private bool m_ContentSpaceInit = false;
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private float m_ContentSpacing = 0;
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protected float m_ContentLeftPadding = 0;
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protected float m_ContentRightPadding = 0;
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protected float m_ContentTopPadding = 0;
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protected float m_ContentBottomPadding = 0;
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protected GridLayoutGroup m_GridLayout = null;
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protected float contentSpacing
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{
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get
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{
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if (m_ContentSpaceInit)
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{
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return m_ContentSpacing;
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}
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m_ContentSpaceInit = true;
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m_ContentSpacing = 0;
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if (content != null)
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{
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HorizontalOrVerticalLayoutGroup layout1 = content.GetComponent<HorizontalOrVerticalLayoutGroup>();
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if (layout1 != null)
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{
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m_ContentSpacing = layout1.spacing;
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m_ContentLeftPadding = layout1.padding.left;
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m_ContentRightPadding = layout1.padding.right;
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m_ContentTopPadding = layout1.padding.top;
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m_ContentBottomPadding = layout1.padding.bottom;
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}
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m_GridLayout = content.GetComponent<GridLayoutGroup>();
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if (m_GridLayout != null)
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{
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m_ContentSpacing = GetAbsDimension(m_GridLayout.spacing);
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m_ContentLeftPadding = m_GridLayout.padding.left;
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m_ContentRightPadding = m_GridLayout.padding.right;
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m_ContentTopPadding = m_GridLayout.padding.top;
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m_ContentBottomPadding = m_GridLayout.padding.bottom;
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}
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}
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return m_ContentSpacing;
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}
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}
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private bool m_ContentConstraintCountInit = false;
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private int m_ContentConstraintCount = 0;
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protected int contentConstraintCount
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{
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get
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{
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if (m_ContentConstraintCountInit)
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{
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return m_ContentConstraintCount;
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}
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m_ContentConstraintCountInit = true;
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m_ContentConstraintCount = 1;
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if (content != null)
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{
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GridLayoutGroup layout2 = content.GetComponent<GridLayoutGroup>();
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if (layout2 != null)
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{
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if (layout2.constraint == GridLayoutGroup.Constraint.Flexible)
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{
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Debug.LogWarning("[LoopScrollRect] Flexible not supported yet");
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}
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m_ContentConstraintCount = layout2.constraintCount;
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}
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}
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return m_ContentConstraintCount;
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}
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}
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// the first line
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protected int StartLine
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{
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get
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{
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return Mathf.CeilToInt((float)(itemTypeStart) / contentConstraintCount);
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}
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}
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// how many lines we have for now
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protected int CurrentLines
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{
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get
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{
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return Mathf.CeilToInt((float)(itemTypeEnd - itemTypeStart) / contentConstraintCount);
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}
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}
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// how many lines we have in total
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protected int TotalLines
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{
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get
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{
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return Mathf.CeilToInt((float)(totalCount) / contentConstraintCount);
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}
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}
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protected virtual bool UpdateItems(Bounds viewBounds, Bounds contentBounds) { return false; }
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//==========LoopScrollRect==========
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public enum MovementType
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{
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Unrestricted, // Unrestricted movement -- can scroll forever
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Elastic, // Restricted but flexible -- can go past the edges, but springs back in place
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Clamped, // Restricted movement where it's not possible to go past the edges
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}
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public enum ScrollbarVisibility
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{
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Permanent,
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AutoHide,
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AutoHideAndExpandViewport,
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}
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[Serializable]
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public class ScrollRectEvent : UnityEvent<Vector2> { }
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[SerializeField]
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protected RectTransform m_Content;
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public RectTransform content { get { return m_Content; } set { m_Content = value; } }
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[SerializeField]
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private bool m_Horizontal = true;
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public bool horizontal { get { return m_Horizontal; } set { m_Horizontal = value; } }
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[SerializeField]
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private bool m_Vertical = true;
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public bool vertical { get { return m_Vertical; } set { m_Vertical = value; } }
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[SerializeField]
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private MovementType m_MovementType = MovementType.Elastic;
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public MovementType movementType { get { return m_MovementType; } set { m_MovementType = value; } }
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[SerializeField]
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private float m_Elasticity = 0.1f; // Only used for MovementType.Elastic
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public float elasticity { get { return m_Elasticity; } set { m_Elasticity = value; } }
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[SerializeField]
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private bool m_Inertia = true;
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public bool inertia { get { return m_Inertia; } set { m_Inertia = value; } }
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[SerializeField]
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private float m_DecelerationRate = 0.135f; // Only used when inertia is enabled
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public float decelerationRate { get { return m_DecelerationRate; } set { m_DecelerationRate = value; } }
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[SerializeField]
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private float m_ScrollSensitivity = 1.0f;
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public float scrollSensitivity { get { return m_ScrollSensitivity; } set { m_ScrollSensitivity = value; } }
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[SerializeField]
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private RectTransform m_Viewport;
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public RectTransform viewport { get { return m_Viewport; } set { m_Viewport = value; SetDirtyCaching(); } }
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[SerializeField]
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private Scrollbar m_HorizontalScrollbar;
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public Scrollbar horizontalScrollbar
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{
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get
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{
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return m_HorizontalScrollbar;
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}
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set
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{
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if (m_HorizontalScrollbar)
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m_HorizontalScrollbar.onValueChanged.RemoveListener(SetHorizontalNormalizedPosition);
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m_HorizontalScrollbar = value;
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if (m_HorizontalScrollbar)
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m_HorizontalScrollbar.onValueChanged.AddListener(SetHorizontalNormalizedPosition);
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SetDirtyCaching();
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}
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}
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[SerializeField]
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private Scrollbar m_VerticalScrollbar;
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public Scrollbar verticalScrollbar
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{
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get
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{
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return m_VerticalScrollbar;
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}
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set
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{
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if (m_VerticalScrollbar)
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m_VerticalScrollbar.onValueChanged.RemoveListener(SetVerticalNormalizedPosition);
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m_VerticalScrollbar = value;
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if (m_VerticalScrollbar)
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m_VerticalScrollbar.onValueChanged.AddListener(SetVerticalNormalizedPosition);
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SetDirtyCaching();
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}
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}
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[SerializeField]
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private ScrollbarVisibility m_HorizontalScrollbarVisibility;
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public ScrollbarVisibility horizontalScrollbarVisibility { get { return m_HorizontalScrollbarVisibility; } set { m_HorizontalScrollbarVisibility = value; SetDirtyCaching(); } }
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[SerializeField]
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private ScrollbarVisibility m_VerticalScrollbarVisibility;
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public ScrollbarVisibility verticalScrollbarVisibility { get { return m_VerticalScrollbarVisibility; } set { m_VerticalScrollbarVisibility = value; SetDirtyCaching(); } }
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[SerializeField]
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private float m_HorizontalScrollbarSpacing;
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public float horizontalScrollbarSpacing { get { return m_HorizontalScrollbarSpacing; } set { m_HorizontalScrollbarSpacing = value; SetDirty(); } }
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[SerializeField]
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private float m_VerticalScrollbarSpacing;
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public float verticalScrollbarSpacing { get { return m_VerticalScrollbarSpacing; } set { m_VerticalScrollbarSpacing = value; SetDirty(); } }
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[SerializeField]
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private ScrollRectEvent m_OnValueChanged = new ScrollRectEvent();
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public ScrollRectEvent onValueChanged { get { return m_OnValueChanged; } set { m_OnValueChanged = value; } }
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// The offset from handle position to mouse down position
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private Vector2 m_PointerStartLocalCursor = Vector2.zero;
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private Vector2 m_ContentStartPosition = Vector2.zero;
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private RectTransform m_ViewRect;
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protected RectTransform viewRect
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{
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get
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{
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if (m_ViewRect == null)
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m_ViewRect = m_Viewport;
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if (m_ViewRect == null)
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m_ViewRect = (RectTransform)transform;
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return m_ViewRect;
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}
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}
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private Bounds m_ContentBounds;
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private Bounds m_ViewBounds;
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private Vector2 m_Velocity;
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public Vector2 velocity { get { return m_Velocity; } set { m_Velocity = value; } }
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private bool m_Dragging;
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private Vector2 m_PrevPosition = Vector2.zero;
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private Bounds m_PrevContentBounds;
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private Bounds m_PrevViewBounds;
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[NonSerialized]
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private bool m_HasRebuiltLayout = false;
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private bool m_HSliderExpand;
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private bool m_VSliderExpand;
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private float m_HSliderHeight;
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private float m_VSliderWidth;
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[System.NonSerialized]
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private RectTransform m_Rect;
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private RectTransform rectTransform
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{
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get
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{
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if (m_Rect == null)
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m_Rect = GetComponent<RectTransform>();
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return m_Rect;
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}
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}
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private RectTransform m_HorizontalScrollbarRect;
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private RectTransform m_VerticalScrollbarRect;
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private DrivenRectTransformTracker m_Tracker;
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protected LoopScrollRectBase()
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{
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}
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//==========LoopScrollRect==========
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#if UNITY_EDITOR
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protected override void Awake()
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{
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base.Awake();
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if (Application.isPlaying)
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{
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float value = (reverseDirection ^ (direction == LoopScrollRectDirection.Horizontal)) ? 0 : 1;
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Debug.Assert(GetAbsDimension(content.pivot) == value, this);
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Debug.Assert(GetAbsDimension(content.anchorMin) == value, this);
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Debug.Assert(GetAbsDimension(content.anchorMax) == value, this);
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}
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}
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#endif
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public void ClearCells()
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{
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if (Application.isPlaying)
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{
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itemTypeStart = 0;
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itemTypeEnd = 0;
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totalCount = 0;
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for (int i = content.childCount - 1; i >= 0; i--)
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{
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prefabSource.ReturnObject(content.GetChild(i));
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}
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}
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}
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||
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public int GetFirstItem(out float offset)
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{
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if (direction == LoopScrollRectDirection.Vertical)
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offset = m_ViewBounds.max.y - m_ContentBounds.max.y;
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else
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offset = m_ContentBounds.min.x - m_ViewBounds.min.x;
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int idx = 0;
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if (itemTypeEnd > itemTypeStart)
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{
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float size = GetSize(content.GetChild(0) as RectTransform, false);
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while (size + offset <= 0 && itemTypeStart + idx + contentConstraintCount < itemTypeEnd)
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{
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offset += size;
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idx += contentConstraintCount;
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size = GetSize(content.GetChild(idx) as RectTransform);
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||
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}
|
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}
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return idx + itemTypeStart;
|
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}
|
||
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||
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public int GetLastItem(out float offset)
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{
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if (direction == LoopScrollRectDirection.Vertical)
|
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offset = m_ContentBounds.min.y - m_ViewBounds.min.y;
|
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else
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offset = m_ViewBounds.max.x - m_ContentBounds.max.x;
|
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int idx = 0;
|
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if (itemTypeEnd > itemTypeStart)
|
||
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{
|
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int totalChildCount = content.childCount;
|
||
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float size = GetSize(content.GetChild(totalChildCount - idx - 1) as RectTransform, false);
|
||
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while (size + offset <= 0 && itemTypeStart < itemTypeEnd - idx - contentConstraintCount)
|
||
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{
|
||
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offset += size;
|
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idx += contentConstraintCount;
|
||
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size = GetSize(content.GetChild(totalChildCount - idx - 1) as RectTransform);
|
||
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}
|
||
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}
|
||
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offset = -offset;
|
||
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return itemTypeEnd - idx - 1;
|
||
|
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}
|
||
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|
||
|
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public void SrollToCell(int index, float speed)
|
||
|
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{
|
||
|
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if (totalCount >= 0 && (index < 0 || index >= totalCount))
|
||
|
|
{
|
||
|
|
Debug.LogErrorFormat("invalid index {0}", index);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
StopAllCoroutines();
|
||
|
|
if (speed <= 0)
|
||
|
|
{
|
||
|
|
RefillCells(index);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
StartCoroutine(ScrollToCellCoroutine(index, speed));
|
||
|
|
}
|
||
|
|
|
||
|
|
public void SrollToCellWithinTime(int index, float time)
|
||
|
|
{
|
||
|
|
if (totalCount >= 0 && (index < 0 || index >= totalCount))
|
||
|
|
{
|
||
|
|
Debug.LogErrorFormat("invalid index {0}", index);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
StopAllCoroutines();
|
||
|
|
if (time <= 0)
|
||
|
|
{
|
||
|
|
RefillCells(index);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
float dist = 0;
|
||
|
|
float offset = 0;
|
||
|
|
int currentFirst = reverseDirection ? GetLastItem(out offset) : GetFirstItem(out offset);
|
||
|
|
|
||
|
|
int TargetLine = (index / contentConstraintCount);
|
||
|
|
int CurrentLine = (currentFirst / contentConstraintCount);
|
||
|
|
|
||
|
|
if (TargetLine == CurrentLine)
|
||
|
|
{
|
||
|
|
dist = offset;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (sizeHelper != null)
|
||
|
|
{
|
||
|
|
dist = GetDimension(sizeHelper.GetItemsSize(currentFirst) - sizeHelper.GetItemsSize(index));
|
||
|
|
dist += offset;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
float elementSize = (GetAbsDimension(m_ContentBounds.size) - contentSpacing * (CurrentLines - 1)) / CurrentLines;
|
||
|
|
dist = elementSize * (CurrentLine - TargetLine) + contentSpacing * (CurrentLine - TargetLine - 1);
|
||
|
|
dist -= offset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
StartCoroutine(ScrollToCellCoroutine(index, Mathf.Abs(dist) / time));
|
||
|
|
}
|
||
|
|
|
||
|
|
IEnumerator ScrollToCellCoroutine(int index, float speed)
|
||
|
|
{
|
||
|
|
bool needMoving = true;
|
||
|
|
while (needMoving)
|
||
|
|
{
|
||
|
|
yield return null;
|
||
|
|
if (!m_Dragging)
|
||
|
|
{
|
||
|
|
float move = 0;
|
||
|
|
if (index < itemTypeStart)
|
||
|
|
{
|
||
|
|
move = -Time.deltaTime * speed;
|
||
|
|
}
|
||
|
|
else if (index >= itemTypeEnd)
|
||
|
|
{
|
||
|
|
move = Time.deltaTime * speed;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
var m_ItemBounds = GetBounds4Item(index);
|
||
|
|
var offset = 0.0f;
|
||
|
|
if (direction == LoopScrollRectDirection.Vertical)
|
||
|
|
offset = reverseDirection ? (m_ViewBounds.min.y - m_ItemBounds.min.y) : (m_ViewBounds.max.y - m_ItemBounds.max.y);
|
||
|
|
else
|
||
|
|
offset = reverseDirection ? (m_ItemBounds.max.x - m_ViewBounds.max.x) : (m_ItemBounds.min.x - m_ViewBounds.min.x);
|
||
|
|
// check if we cannot move on
|
||
|
|
if (totalCount >= 0)
|
||
|
|
{
|
||
|
|
if (offset > 0 && itemTypeEnd == totalCount && !reverseDirection)
|
||
|
|
{
|
||
|
|
m_ItemBounds = GetBounds4Item(totalCount - 1);
|
||
|
|
// reach bottom
|
||
|
|
if ((direction == LoopScrollRectDirection.Vertical && m_ItemBounds.min.y > m_ViewBounds.min.y) ||
|
||
|
|
(direction == LoopScrollRectDirection.Horizontal && m_ItemBounds.max.x < m_ViewBounds.max.x))
|
||
|
|
{
|
||
|
|
needMoving = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (offset < 0 && itemTypeStart == 0 && reverseDirection)
|
||
|
|
{
|
||
|
|
m_ItemBounds = GetBounds4Item(0);
|
||
|
|
if ((direction == LoopScrollRectDirection.Vertical && m_ItemBounds.max.y < m_ViewBounds.max.y) ||
|
||
|
|
(direction == LoopScrollRectDirection.Horizontal && m_ItemBounds.min.x > m_ViewBounds.min.x))
|
||
|
|
{
|
||
|
|
needMoving = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
float maxMove = Time.deltaTime * speed;
|
||
|
|
if (Mathf.Abs(offset) < maxMove)
|
||
|
|
{
|
||
|
|
needMoving = false;
|
||
|
|
move = offset;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
move = Mathf.Sign(offset) * maxMove;
|
||
|
|
}
|
||
|
|
if (move != 0)
|
||
|
|
{
|
||
|
|
Vector2 offset = GetVector(move);
|
||
|
|
content.anchoredPosition += offset;
|
||
|
|
m_PrevPosition += offset;
|
||
|
|
m_ContentStartPosition += offset;
|
||
|
|
UpdateBounds(true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
StopMovement();
|
||
|
|
UpdatePrevData();
|
||
|
|
}
|
||
|
|
|
||
|
|
protected abstract void ProvideData(Transform transform, int index);
|
||
|
|
|
||
|
|
public void RefreshCells()
|
||
|
|
{
|
||
|
|
if (Application.isPlaying && this.isActiveAndEnabled)
|
||
|
|
{
|
||
|
|
itemTypeEnd = itemTypeStart;
|
||
|
|
// recycle items if we can
|
||
|
|
for (int i = 0; i < content.childCount; i++)
|
||
|
|
{
|
||
|
|
if (itemTypeEnd < totalCount)
|
||
|
|
{
|
||
|
|
ProvideData(content.GetChild(i), itemTypeEnd);
|
||
|
|
itemTypeEnd++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
prefabSource.ReturnObject(content.GetChild(i));
|
||
|
|
i--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
UpdateBounds(true);
|
||
|
|
UpdateScrollbars(Vector2.zero);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public void RefillCellsFromEnd(int endItem = 0, bool alignStart = false)
|
||
|
|
{
|
||
|
|
if (!Application.isPlaying)
|
||
|
|
return;
|
||
|
|
|
||
|
|
itemTypeEnd = reverseDirection ? endItem : totalCount - endItem;
|
||
|
|
itemTypeStart = itemTypeEnd;
|
||
|
|
|
||
|
|
if (totalCount >= 0 && itemTypeStart % contentConstraintCount != 0)
|
||
|
|
{
|
||
|
|
itemTypeStart = (itemTypeStart / contentConstraintCount) * contentConstraintCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
ReturnToTempPool(!reverseDirection, m_Content.childCount);
|
||
|
|
|
||
|
|
float sizeToFill = GetAbsDimension(viewRect.rect.size), sizeFilled = 0;
|
||
|
|
|
||
|
|
bool first = true;
|
||
|
|
while (sizeToFill > sizeFilled)
|
||
|
|
{
|
||
|
|
float size = reverseDirection ? NewItemAtEnd(!first) : NewItemAtStart(!first);
|
||
|
|
if (size < 0)
|
||
|
|
break;
|
||
|
|
first = false;
|
||
|
|
sizeFilled += size;
|
||
|
|
}
|
||
|
|
|
||
|
|
// refill from start in case not full yet
|
||
|
|
while (sizeToFill > sizeFilled)
|
||
|
|
{
|
||
|
|
float size = reverseDirection ? NewItemAtStart(!first) : NewItemAtEnd(!first);
|
||
|
|
if (size < 0)
|
||
|
|
break;
|
||
|
|
first = false;
|
||
|
|
sizeFilled += size;
|
||
|
|
}
|
||
|
|
|
||
|
|
Vector2 pos = m_Content.anchoredPosition;
|
||
|
|
float dist = alignStart ? 0 : Mathf.Max(0, sizeFilled - sizeToFill);
|
||
|
|
if (reverseDirection)
|
||
|
|
dist = -dist;
|
||
|
|
if (direction == LoopScrollRectDirection.Vertical)
|
||
|
|
pos.y = dist;
|
||
|
|
else
|
||
|
|
pos.x = -dist;
|
||
|
|
m_Content.anchoredPosition = pos;
|
||
|
|
m_ContentStartPosition = pos;
|
||
|
|
|
||
|
|
ClearTempPool();
|
||
|
|
// force build bounds here so scrollbar can access newest bounds
|
||
|
|
LayoutRebuilder.ForceRebuildLayoutImmediate(content);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
UpdateScrollbars(Vector2.zero);
|
||
|
|
StopMovement();
|
||
|
|
UpdatePrevData();
|
||
|
|
}
|
||
|
|
|
||
|
|
public void RefillCells(int startItem = 0, bool fillViewRect = false, float contentOffset = 0)
|
||
|
|
{
|
||
|
|
if (!Application.isPlaying)
|
||
|
|
return;
|
||
|
|
|
||
|
|
itemTypeStart = reverseDirection ? totalCount - startItem : startItem;
|
||
|
|
if (totalCount >= 0 && itemTypeStart % contentConstraintCount != 0)
|
||
|
|
{
|
||
|
|
itemTypeStart = (itemTypeStart / contentConstraintCount) * contentConstraintCount;
|
||
|
|
}
|
||
|
|
itemTypeEnd = itemTypeStart;
|
||
|
|
|
||
|
|
// Don't `Canvas.ForceUpdateCanvases();` here, or it will new/delete cells to change itemTypeStart/End
|
||
|
|
ReturnToTempPool(reverseDirection, m_Content.childCount);
|
||
|
|
|
||
|
|
float sizeToFill = GetAbsDimension(viewRect.rect.size) + Mathf.Abs(contentOffset);
|
||
|
|
float sizeFilled = 0;
|
||
|
|
// m_ViewBounds may be not ready when RefillCells on Start
|
||
|
|
|
||
|
|
float itemSize = 0;
|
||
|
|
|
||
|
|
bool first = true;
|
||
|
|
while (sizeToFill > sizeFilled)
|
||
|
|
{
|
||
|
|
float size = reverseDirection ? NewItemAtStart(!first) : NewItemAtEnd(!first);
|
||
|
|
if (size < 0)
|
||
|
|
break;
|
||
|
|
first = false;
|
||
|
|
itemSize = size;
|
||
|
|
sizeFilled += size;
|
||
|
|
}
|
||
|
|
|
||
|
|
// refill from start in case not full yet
|
||
|
|
while (sizeToFill > sizeFilled)
|
||
|
|
{
|
||
|
|
float size = reverseDirection ? NewItemAtEnd(!first) : NewItemAtStart(!first);
|
||
|
|
if (size < 0)
|
||
|
|
break;
|
||
|
|
first = false;
|
||
|
|
sizeFilled += size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fillViewRect && itemSize > 0 && sizeFilled < sizeToFill)
|
||
|
|
{
|
||
|
|
int itemsToAddCount = (int)((sizeToFill - sizeFilled) / itemSize); //calculate how many items can be added above the offset, so it still is visible in the view
|
||
|
|
int newOffset = startItem - itemsToAddCount;
|
||
|
|
if (newOffset < 0) newOffset = 0;
|
||
|
|
if (newOffset != startItem) RefillCells(newOffset); //refill again, with the new offset value, and now with fillViewRect disabled.
|
||
|
|
}
|
||
|
|
|
||
|
|
Vector2 pos = m_Content.anchoredPosition;
|
||
|
|
if (direction == LoopScrollRectDirection.Vertical)
|
||
|
|
pos.y = -contentOffset;
|
||
|
|
else
|
||
|
|
pos.x = contentOffset;
|
||
|
|
m_Content.anchoredPosition = pos;
|
||
|
|
m_ContentStartPosition = pos;
|
||
|
|
|
||
|
|
ClearTempPool();
|
||
|
|
// force build bounds here so scrollbar can access newest bounds
|
||
|
|
LayoutRebuilder.ForceRebuildLayoutImmediate(content);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
UpdateScrollbars(Vector2.zero);
|
||
|
|
StopMovement();
|
||
|
|
UpdatePrevData();
|
||
|
|
}
|
||
|
|
|
||
|
|
protected float NewItemAtStart(bool includeSpacing = true)
|
||
|
|
{
|
||
|
|
if (totalCount >= 0 && itemTypeStart - contentConstraintCount < 0)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
float size = 0;
|
||
|
|
for (int i = 0; i < contentConstraintCount; i++)
|
||
|
|
{
|
||
|
|
itemTypeStart--;
|
||
|
|
RectTransform newItem = GetFromTempPool(itemTypeStart);
|
||
|
|
newItem.SetSiblingIndex(deletedItemTypeStart);
|
||
|
|
size = Mathf.Max(GetSize(newItem, includeSpacing), size);
|
||
|
|
}
|
||
|
|
threshold = Mathf.Max(threshold, size * 1.5f);
|
||
|
|
|
||
|
|
if (!reverseDirection)
|
||
|
|
{
|
||
|
|
Vector2 offset = GetVector(size);
|
||
|
|
content.anchoredPosition += offset;
|
||
|
|
m_PrevPosition += offset;
|
||
|
|
m_ContentStartPosition += offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected float DeleteItemAtStart()
|
||
|
|
{
|
||
|
|
// special case: when moving or dragging, we cannot simply delete start when we've reached the end
|
||
|
|
if ((m_Dragging || m_Velocity != Vector2.zero) && totalCount >= 0 && itemTypeEnd >= totalCount - contentConstraintCount)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
int availableChilds = content.childCount - deletedItemTypeStart - deletedItemTypeEnd;
|
||
|
|
Debug.Assert(availableChilds >= 0);
|
||
|
|
if (availableChilds == 0)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
float size = 0;
|
||
|
|
for (int i = 0; i < contentConstraintCount; i++)
|
||
|
|
{
|
||
|
|
RectTransform oldItem = content.GetChild(deletedItemTypeStart) as RectTransform;
|
||
|
|
size = Mathf.Max(GetSize(oldItem), size);
|
||
|
|
ReturnToTempPool(true);
|
||
|
|
availableChilds--;
|
||
|
|
itemTypeStart++;
|
||
|
|
|
||
|
|
if (availableChilds == 0)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!reverseDirection)
|
||
|
|
{
|
||
|
|
Vector2 offset = GetVector(size);
|
||
|
|
content.anchoredPosition -= offset;
|
||
|
|
m_PrevPosition -= offset;
|
||
|
|
m_ContentStartPosition -= offset;
|
||
|
|
}
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
protected float NewItemAtEnd(bool includeSpacing = true)
|
||
|
|
{
|
||
|
|
if (totalCount >= 0 && itemTypeEnd >= totalCount)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
float size = 0;
|
||
|
|
// issue 4: fill lines to end first
|
||
|
|
int availableChilds = content.childCount - deletedItemTypeStart - deletedItemTypeEnd;
|
||
|
|
int count = contentConstraintCount - (availableChilds % contentConstraintCount);
|
||
|
|
for (int i = 0; i < count; i++)
|
||
|
|
{
|
||
|
|
RectTransform newItem = GetFromTempPool(itemTypeEnd);
|
||
|
|
newItem.SetSiblingIndex(content.childCount - deletedItemTypeEnd - 1);
|
||
|
|
size = Mathf.Max(GetSize(newItem, includeSpacing), size);
|
||
|
|
itemTypeEnd++;
|
||
|
|
if (totalCount >= 0 && itemTypeEnd >= totalCount)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
threshold = Mathf.Max(threshold, size * 1.5f);
|
||
|
|
|
||
|
|
if (reverseDirection)
|
||
|
|
{
|
||
|
|
Vector2 offset = GetVector(size);
|
||
|
|
content.anchoredPosition -= offset;
|
||
|
|
m_PrevPosition -= offset;
|
||
|
|
m_ContentStartPosition -= offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected float DeleteItemAtEnd()
|
||
|
|
{
|
||
|
|
if ((m_Dragging || m_Velocity != Vector2.zero) && totalCount >= 0 && itemTypeStart < contentConstraintCount)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
int availableChilds = content.childCount - deletedItemTypeStart - deletedItemTypeEnd;
|
||
|
|
Debug.Assert(availableChilds >= 0);
|
||
|
|
if (availableChilds == 0)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
float size = 0;
|
||
|
|
for (int i = 0; i < contentConstraintCount; i++)
|
||
|
|
{
|
||
|
|
RectTransform oldItem = content.GetChild(content.childCount - deletedItemTypeEnd - 1) as RectTransform;
|
||
|
|
size = Mathf.Max(GetSize(oldItem), size);
|
||
|
|
ReturnToTempPool(false);
|
||
|
|
availableChilds--;
|
||
|
|
itemTypeEnd--;
|
||
|
|
if (itemTypeEnd % contentConstraintCount == 0 || availableChilds == 0)
|
||
|
|
{
|
||
|
|
break; //just delete the whole row
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (reverseDirection)
|
||
|
|
{
|
||
|
|
Vector2 offset = GetVector(size);
|
||
|
|
content.anchoredPosition += offset;
|
||
|
|
m_PrevPosition += offset;
|
||
|
|
m_ContentStartPosition += offset;
|
||
|
|
}
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected int deletedItemTypeStart = 0;
|
||
|
|
protected int deletedItemTypeEnd = 0;
|
||
|
|
protected abstract RectTransform GetFromTempPool(int itemIdx);
|
||
|
|
protected abstract void ReturnToTempPool(bool fromStart, int count = 1);
|
||
|
|
protected abstract void ClearTempPool();
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
|
||
|
|
public virtual void Rebuild(CanvasUpdate executing)
|
||
|
|
{
|
||
|
|
if (executing == CanvasUpdate.Prelayout)
|
||
|
|
{
|
||
|
|
UpdateCachedData();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (executing == CanvasUpdate.PostLayout)
|
||
|
|
{
|
||
|
|
UpdateBounds();
|
||
|
|
UpdateScrollbars(Vector2.zero);
|
||
|
|
UpdatePrevData();
|
||
|
|
|
||
|
|
m_HasRebuiltLayout = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void LayoutComplete()
|
||
|
|
{ }
|
||
|
|
|
||
|
|
public virtual void GraphicUpdateComplete()
|
||
|
|
{ }
|
||
|
|
|
||
|
|
void UpdateCachedData()
|
||
|
|
{
|
||
|
|
Transform transform = this.transform;
|
||
|
|
m_HorizontalScrollbarRect = m_HorizontalScrollbar == null ? null : m_HorizontalScrollbar.transform as RectTransform;
|
||
|
|
m_VerticalScrollbarRect = m_VerticalScrollbar == null ? null : m_VerticalScrollbar.transform as RectTransform;
|
||
|
|
|
||
|
|
// These are true if either the elements are children, or they don't exist at all.
|
||
|
|
bool viewIsChild = (viewRect.parent == transform);
|
||
|
|
bool hScrollbarIsChild = (!m_HorizontalScrollbarRect || m_HorizontalScrollbarRect.parent == transform);
|
||
|
|
bool vScrollbarIsChild = (!m_VerticalScrollbarRect || m_VerticalScrollbarRect.parent == transform);
|
||
|
|
bool allAreChildren = (viewIsChild && hScrollbarIsChild && vScrollbarIsChild);
|
||
|
|
|
||
|
|
m_HSliderExpand = allAreChildren && m_HorizontalScrollbarRect && horizontalScrollbarVisibility == ScrollbarVisibility.AutoHideAndExpandViewport;
|
||
|
|
m_VSliderExpand = allAreChildren && m_VerticalScrollbarRect && verticalScrollbarVisibility == ScrollbarVisibility.AutoHideAndExpandViewport;
|
||
|
|
m_HSliderHeight = (m_HorizontalScrollbarRect == null ? 0 : m_HorizontalScrollbarRect.rect.height);
|
||
|
|
m_VSliderWidth = (m_VerticalScrollbarRect == null ? 0 : m_VerticalScrollbarRect.rect.width);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override void OnEnable()
|
||
|
|
{
|
||
|
|
base.OnEnable();
|
||
|
|
|
||
|
|
if (m_HorizontalScrollbar)
|
||
|
|
m_HorizontalScrollbar.onValueChanged.AddListener(SetHorizontalNormalizedPosition);
|
||
|
|
if (m_VerticalScrollbar)
|
||
|
|
m_VerticalScrollbar.onValueChanged.AddListener(SetVerticalNormalizedPosition);
|
||
|
|
|
||
|
|
CanvasUpdateRegistry.RegisterCanvasElementForLayoutRebuild(this);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override void OnDisable()
|
||
|
|
{
|
||
|
|
CanvasUpdateRegistry.UnRegisterCanvasElementForRebuild(this);
|
||
|
|
|
||
|
|
if (m_HorizontalScrollbar)
|
||
|
|
m_HorizontalScrollbar.onValueChanged.RemoveListener(SetHorizontalNormalizedPosition);
|
||
|
|
if (m_VerticalScrollbar)
|
||
|
|
m_VerticalScrollbar.onValueChanged.RemoveListener(SetVerticalNormalizedPosition);
|
||
|
|
|
||
|
|
m_HasRebuiltLayout = false;
|
||
|
|
m_Tracker.Clear();
|
||
|
|
m_Velocity = Vector2.zero;
|
||
|
|
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
|
||
|
|
base.OnDisable();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override bool IsActive()
|
||
|
|
{
|
||
|
|
return base.IsActive() && m_Content != null;
|
||
|
|
}
|
||
|
|
|
||
|
|
private void EnsureLayoutHasRebuilt()
|
||
|
|
{
|
||
|
|
if (!m_HasRebuiltLayout && !CanvasUpdateRegistry.IsRebuildingLayout())
|
||
|
|
Canvas.ForceUpdateCanvases();
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void StopMovement()
|
||
|
|
{
|
||
|
|
m_Velocity = Vector2.zero;
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void OnScroll(PointerEventData data)
|
||
|
|
{
|
||
|
|
if (!IsActive())
|
||
|
|
return;
|
||
|
|
|
||
|
|
EnsureLayoutHasRebuilt();
|
||
|
|
UpdateBounds();
|
||
|
|
|
||
|
|
Vector2 delta = data.scrollDelta;
|
||
|
|
// Down is positive for scroll events, while in UI system up is positive.
|
||
|
|
delta.y *= -1;
|
||
|
|
if (vertical && !horizontal)
|
||
|
|
{
|
||
|
|
if (Mathf.Abs(delta.x) > Mathf.Abs(delta.y))
|
||
|
|
delta.y = delta.x;
|
||
|
|
delta.x = 0;
|
||
|
|
}
|
||
|
|
if (horizontal && !vertical)
|
||
|
|
{
|
||
|
|
if (Mathf.Abs(delta.y) > Mathf.Abs(delta.x))
|
||
|
|
delta.x = delta.y;
|
||
|
|
delta.y = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
Vector2 position = m_Content.anchoredPosition;
|
||
|
|
position += delta * m_ScrollSensitivity;
|
||
|
|
if (m_MovementType == MovementType.Clamped)
|
||
|
|
position += CalculateOffset(position - m_Content.anchoredPosition);
|
||
|
|
|
||
|
|
SetContentAnchoredPosition(position);
|
||
|
|
UpdateBounds();
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void OnInitializePotentialDrag(PointerEventData eventData)
|
||
|
|
{
|
||
|
|
if (eventData.button != PointerEventData.InputButton.Left)
|
||
|
|
return;
|
||
|
|
|
||
|
|
m_Velocity = Vector2.zero;
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void OnBeginDrag(PointerEventData eventData)
|
||
|
|
{
|
||
|
|
if (eventData.button != PointerEventData.InputButton.Left)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (!IsActive())
|
||
|
|
return;
|
||
|
|
|
||
|
|
UpdateBounds();
|
||
|
|
|
||
|
|
m_PointerStartLocalCursor = Vector2.zero;
|
||
|
|
RectTransformUtility.ScreenPointToLocalPointInRectangle(viewRect, eventData.position, eventData.pressEventCamera, out m_PointerStartLocalCursor);
|
||
|
|
m_ContentStartPosition = m_Content.anchoredPosition;
|
||
|
|
m_Dragging = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void OnEndDrag(PointerEventData eventData)
|
||
|
|
{
|
||
|
|
if (eventData.button != PointerEventData.InputButton.Left)
|
||
|
|
return;
|
||
|
|
|
||
|
|
m_Dragging = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void OnDrag(PointerEventData eventData)
|
||
|
|
{
|
||
|
|
if (eventData.button != PointerEventData.InputButton.Left)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (!IsActive())
|
||
|
|
return;
|
||
|
|
|
||
|
|
Vector2 localCursor;
|
||
|
|
if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(viewRect, eventData.position, eventData.pressEventCamera, out localCursor))
|
||
|
|
return;
|
||
|
|
|
||
|
|
UpdateBounds();
|
||
|
|
|
||
|
|
var pointerDelta = localCursor - m_PointerStartLocalCursor;
|
||
|
|
Vector2 position = m_ContentStartPosition + pointerDelta;
|
||
|
|
|
||
|
|
// Offset to get content into place in the view.
|
||
|
|
Vector2 offset = CalculateOffset(position - m_Content.anchoredPosition);
|
||
|
|
position += offset;
|
||
|
|
if (m_MovementType == MovementType.Elastic)
|
||
|
|
{
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (offset.x != 0)
|
||
|
|
position.x = position.x - RubberDelta(offset.x, m_ViewBounds.size.x) * rubberScale;
|
||
|
|
if (offset.y != 0)
|
||
|
|
position.y = position.y - RubberDelta(offset.y, m_ViewBounds.size.y) * rubberScale;
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
}
|
||
|
|
|
||
|
|
SetContentAnchoredPosition(position);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected virtual void SetContentAnchoredPosition(Vector2 position)
|
||
|
|
{
|
||
|
|
if (!m_Horizontal)
|
||
|
|
position.x = m_Content.anchoredPosition.x;
|
||
|
|
if (!m_Vertical)
|
||
|
|
position.y = m_Content.anchoredPosition.y;
|
||
|
|
|
||
|
|
if ((position - m_Content.anchoredPosition).sqrMagnitude > 0.001f)
|
||
|
|
{
|
||
|
|
m_Content.anchoredPosition = position;
|
||
|
|
UpdateBounds(true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
protected virtual void LateUpdate()
|
||
|
|
{
|
||
|
|
if (!m_Content)
|
||
|
|
return;
|
||
|
|
|
||
|
|
EnsureLayoutHasRebuilt();
|
||
|
|
UpdateScrollbarVisibility();
|
||
|
|
UpdateBounds();
|
||
|
|
float deltaTime = Time.unscaledDeltaTime;
|
||
|
|
Vector2 offset = CalculateOffset(Vector2.zero);
|
||
|
|
if (!m_Dragging && (offset != Vector2.zero || m_Velocity != Vector2.zero))
|
||
|
|
{
|
||
|
|
Vector2 position = m_Content.anchoredPosition;
|
||
|
|
for (int axis = 0; axis < 2; axis++)
|
||
|
|
{
|
||
|
|
// Apply spring physics if movement is elastic and content has an offset from the view.
|
||
|
|
if (m_MovementType == MovementType.Elastic && offset[axis] != 0)
|
||
|
|
{
|
||
|
|
float speed = m_Velocity[axis];
|
||
|
|
position[axis] = Mathf.SmoothDamp(m_Content.anchoredPosition[axis], m_Content.anchoredPosition[axis] + offset[axis], ref speed, m_Elasticity, Mathf.Infinity, deltaTime);
|
||
|
|
m_Velocity[axis] = speed;
|
||
|
|
}
|
||
|
|
// Else move content according to velocity with deceleration applied.
|
||
|
|
else if (m_Inertia)
|
||
|
|
{
|
||
|
|
m_Velocity[axis] *= Mathf.Pow(m_DecelerationRate, deltaTime);
|
||
|
|
if (Mathf.Abs(m_Velocity[axis]) < 1)
|
||
|
|
m_Velocity[axis] = 0;
|
||
|
|
position[axis] += m_Velocity[axis] * deltaTime;
|
||
|
|
}
|
||
|
|
// If we have neither elaticity or friction, there shouldn't be any velocity.
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_Velocity[axis] = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_Velocity != Vector2.zero)
|
||
|
|
{
|
||
|
|
if (m_MovementType == MovementType.Clamped)
|
||
|
|
{
|
||
|
|
offset = CalculateOffset(position - m_Content.anchoredPosition);
|
||
|
|
position += offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
SetContentAnchoredPosition(position);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_Dragging && m_Inertia)
|
||
|
|
{
|
||
|
|
Vector3 newVelocity = (m_Content.anchoredPosition - m_PrevPosition) / deltaTime;
|
||
|
|
m_Velocity = Vector3.Lerp(m_Velocity, newVelocity, deltaTime * 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_ViewBounds != m_PrevViewBounds || m_ContentBounds != m_PrevContentBounds || m_Content.anchoredPosition != m_PrevPosition)
|
||
|
|
{
|
||
|
|
UpdateScrollbars(offset);
|
||
|
|
m_OnValueChanged.Invoke(normalizedPosition);
|
||
|
|
UpdatePrevData();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void UpdatePrevData()
|
||
|
|
{
|
||
|
|
if (m_Content == null)
|
||
|
|
m_PrevPosition = Vector2.zero;
|
||
|
|
else
|
||
|
|
m_PrevPosition = m_Content.anchoredPosition;
|
||
|
|
m_PrevViewBounds = m_ViewBounds;
|
||
|
|
m_PrevContentBounds = m_ContentBounds;
|
||
|
|
}
|
||
|
|
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
private void GetHorizonalOffsetAndSize(out float totalSize, out float offset)
|
||
|
|
{
|
||
|
|
if (sizeHelper != null)
|
||
|
|
{
|
||
|
|
totalSize = sizeHelper.GetItemsSize(TotalLines).x;
|
||
|
|
offset = m_ContentBounds.min.x - sizeHelper.GetItemsSize(StartLine).x - contentSpacing * StartLine;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
float elementSize = (m_ContentBounds.size.x - contentSpacing * (CurrentLines - 1)) / CurrentLines;
|
||
|
|
totalSize = elementSize * TotalLines + contentSpacing * (TotalLines - 1);
|
||
|
|
offset = m_ContentBounds.min.x - elementSize * StartLine - contentSpacing * StartLine;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void GetVerticalOffsetAndSize(out float totalSize, out float offset)
|
||
|
|
{
|
||
|
|
if (sizeHelper != null)
|
||
|
|
{
|
||
|
|
totalSize = sizeHelper.GetItemsSize(TotalLines).y;
|
||
|
|
offset = m_ContentBounds.max.y + sizeHelper.GetItemsSize(StartLine).y + contentSpacing * StartLine;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
float elementSize = (m_ContentBounds.size.y - contentSpacing * (CurrentLines - 1)) / CurrentLines;
|
||
|
|
totalSize = elementSize * TotalLines + contentSpacing * (TotalLines - 1);
|
||
|
|
offset = m_ContentBounds.max.y + elementSize * StartLine + contentSpacing * StartLine;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
|
||
|
|
private void UpdateScrollbars(Vector2 offset)
|
||
|
|
{
|
||
|
|
if (m_HorizontalScrollbar)
|
||
|
|
{
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (m_ContentBounds.size.x > 0 && totalCount > 0)
|
||
|
|
{
|
||
|
|
float totalSize, _;
|
||
|
|
GetHorizonalOffsetAndSize(out totalSize, out _);
|
||
|
|
m_HorizontalScrollbar.size = Mathf.Clamp01((m_ViewBounds.size.x - Mathf.Abs(offset.x)) / totalSize);
|
||
|
|
}
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
else
|
||
|
|
m_HorizontalScrollbar.size = 1;
|
||
|
|
|
||
|
|
m_HorizontalScrollbar.value = horizontalNormalizedPosition;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_VerticalScrollbar)
|
||
|
|
{
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (m_ContentBounds.size.y > 0 && totalCount > 0)
|
||
|
|
{
|
||
|
|
float totalSize, _;
|
||
|
|
GetVerticalOffsetAndSize(out totalSize, out _);
|
||
|
|
m_VerticalScrollbar.size = Mathf.Clamp01((m_ViewBounds.size.y - Mathf.Abs(offset.y)) / totalSize);
|
||
|
|
}
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
else
|
||
|
|
m_VerticalScrollbar.size = 1;
|
||
|
|
|
||
|
|
m_VerticalScrollbar.value = verticalNormalizedPosition;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public Vector2 normalizedPosition
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
return new Vector2(horizontalNormalizedPosition, verticalNormalizedPosition);
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
SetNormalizedPosition(value.x, 0);
|
||
|
|
SetNormalizedPosition(value.y, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public float horizontalNormalizedPosition
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
UpdateBounds();
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (totalCount > 0 && itemTypeEnd > itemTypeStart)
|
||
|
|
{
|
||
|
|
float totalSize, offset;
|
||
|
|
GetHorizonalOffsetAndSize(out totalSize, out offset);
|
||
|
|
|
||
|
|
if (totalSize <= m_ViewBounds.size.x)
|
||
|
|
return (m_ViewBounds.min.x > offset) ? 1 : 0;
|
||
|
|
return (m_ViewBounds.min.x - offset) / (totalSize - m_ViewBounds.size.x);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return 0.5f;
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
SetNormalizedPosition(value, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public float verticalNormalizedPosition
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
UpdateBounds();
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (totalCount > 0 && itemTypeEnd > itemTypeStart)
|
||
|
|
{
|
||
|
|
float totalSize, offset;
|
||
|
|
GetVerticalOffsetAndSize(out totalSize, out offset);
|
||
|
|
|
||
|
|
if (totalSize <= m_ViewBounds.size.y)
|
||
|
|
return (offset > m_ViewBounds.max.y) ? 1 : 0;
|
||
|
|
return (offset - m_ViewBounds.max.y) / (totalSize - m_ViewBounds.size.y);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return 0.5f;
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
}
|
||
|
|
set
|
||
|
|
{
|
||
|
|
SetNormalizedPosition(value, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void SetHorizontalNormalizedPosition(float value) { SetNormalizedPosition(value, 0); }
|
||
|
|
private void SetVerticalNormalizedPosition(float value) { SetNormalizedPosition(value, 1); }
|
||
|
|
|
||
|
|
private void SetNormalizedPosition(float value, int axis)
|
||
|
|
{
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
if (totalCount <= 0 || itemTypeEnd <= itemTypeStart)
|
||
|
|
return;
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
|
||
|
|
EnsureLayoutHasRebuilt();
|
||
|
|
UpdateBounds();
|
||
|
|
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
Vector3 localPosition = m_Content.localPosition;
|
||
|
|
float newLocalPosition = localPosition[axis];
|
||
|
|
if (axis == 0)
|
||
|
|
{
|
||
|
|
float totalSize, offset;
|
||
|
|
GetHorizonalOffsetAndSize(out totalSize, out offset);
|
||
|
|
|
||
|
|
newLocalPosition += m_ViewBounds.min.x - value * (totalSize - m_ViewBounds.size[axis]) - offset;
|
||
|
|
}
|
||
|
|
else if (axis == 1)
|
||
|
|
{
|
||
|
|
float totalSize, offset;
|
||
|
|
GetVerticalOffsetAndSize(out totalSize, out offset);
|
||
|
|
|
||
|
|
newLocalPosition -= offset - value * (totalSize - m_ViewBounds.size.y) - m_ViewBounds.max.y;
|
||
|
|
}
|
||
|
|
//==========LoopScrollRect==========
|
||
|
|
|
||
|
|
if (Mathf.Abs(localPosition[axis] - newLocalPosition) > 0.01f)
|
||
|
|
{
|
||
|
|
localPosition[axis] = newLocalPosition;
|
||
|
|
m_Content.localPosition = localPosition;
|
||
|
|
m_Velocity[axis] = 0;
|
||
|
|
UpdateBounds(true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static float RubberDelta(float overStretching, float viewSize)
|
||
|
|
{
|
||
|
|
return (1 - (1 / ((Mathf.Abs(overStretching) * 0.55f / viewSize) + 1))) * viewSize * Mathf.Sign(overStretching);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override void OnRectTransformDimensionsChange()
|
||
|
|
{
|
||
|
|
SetDirty();
|
||
|
|
}
|
||
|
|
|
||
|
|
private bool hScrollingNeeded
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
if (Application.isPlaying)
|
||
|
|
return m_ContentBounds.size.x > m_ViewBounds.size.x + 0.01f;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
private bool vScrollingNeeded
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
if (Application.isPlaying)
|
||
|
|
return m_ContentBounds.size.y > m_ViewBounds.size.y + 0.01f;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void CalculateLayoutInputHorizontal() { }
|
||
|
|
public virtual void CalculateLayoutInputVertical() { }
|
||
|
|
|
||
|
|
public virtual float minWidth { get { return -1; } }
|
||
|
|
public virtual float preferredWidth { get { return -1; } }
|
||
|
|
public virtual float flexibleWidth { get { return -1; } }
|
||
|
|
|
||
|
|
public virtual float minHeight { get { return -1; } }
|
||
|
|
public virtual float preferredHeight { get { return -1; } }
|
||
|
|
public virtual float flexibleHeight { get { return -1; } }
|
||
|
|
|
||
|
|
public virtual int layoutPriority { get { return -1; } }
|
||
|
|
|
||
|
|
public virtual void SetLayoutHorizontal()
|
||
|
|
{
|
||
|
|
m_Tracker.Clear();
|
||
|
|
|
||
|
|
if (m_HSliderExpand || m_VSliderExpand)
|
||
|
|
{
|
||
|
|
m_Tracker.Add(this, viewRect,
|
||
|
|
DrivenTransformProperties.Anchors |
|
||
|
|
DrivenTransformProperties.SizeDelta |
|
||
|
|
DrivenTransformProperties.AnchoredPosition);
|
||
|
|
|
||
|
|
// Make view full size to see if content fits.
|
||
|
|
viewRect.anchorMin = Vector2.zero;
|
||
|
|
viewRect.anchorMax = Vector2.one;
|
||
|
|
viewRect.sizeDelta = Vector2.zero;
|
||
|
|
viewRect.anchoredPosition = Vector2.zero;
|
||
|
|
|
||
|
|
// Recalculate content layout with this size to see if it fits when there are no scrollbars.
|
||
|
|
LayoutRebuilder.ForceRebuildLayoutImmediate(content);
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
}
|
||
|
|
|
||
|
|
// If it doesn't fit vertically, enable vertical scrollbar and shrink view horizontally to make room for it.
|
||
|
|
if (m_VSliderExpand && vScrollingNeeded)
|
||
|
|
{
|
||
|
|
viewRect.sizeDelta = new Vector2(-(m_VSliderWidth + m_VerticalScrollbarSpacing), viewRect.sizeDelta.y);
|
||
|
|
|
||
|
|
// Recalculate content layout with this size to see if it fits vertically
|
||
|
|
// when there is a vertical scrollbar (which may reflowed the content to make it taller).
|
||
|
|
LayoutRebuilder.ForceRebuildLayoutImmediate(content);
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
}
|
||
|
|
|
||
|
|
// If it doesn't fit horizontally, enable horizontal scrollbar and shrink view vertically to make room for it.
|
||
|
|
if (m_HSliderExpand && hScrollingNeeded)
|
||
|
|
{
|
||
|
|
viewRect.sizeDelta = new Vector2(viewRect.sizeDelta.x, -(m_HSliderHeight + m_HorizontalScrollbarSpacing));
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the vertical slider didn't kick in the first time, and the horizontal one did,
|
||
|
|
// we need to check again if the vertical slider now needs to kick in.
|
||
|
|
// If it doesn't fit vertically, enable vertical scrollbar and shrink view horizontally to make room for it.
|
||
|
|
if (m_VSliderExpand && vScrollingNeeded && viewRect.sizeDelta.x == 0 && viewRect.sizeDelta.y < 0)
|
||
|
|
{
|
||
|
|
viewRect.sizeDelta = new Vector2(-(m_VSliderWidth + m_VerticalScrollbarSpacing), viewRect.sizeDelta.y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void SetLayoutVertical()
|
||
|
|
{
|
||
|
|
UpdateScrollbarLayout();
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
}
|
||
|
|
|
||
|
|
void UpdateScrollbarVisibility()
|
||
|
|
{
|
||
|
|
if (m_VerticalScrollbar && m_VerticalScrollbarVisibility != ScrollbarVisibility.Permanent && m_VerticalScrollbar.gameObject.activeSelf != vScrollingNeeded)
|
||
|
|
m_VerticalScrollbar.gameObject.SetActive(vScrollingNeeded);
|
||
|
|
|
||
|
|
if (m_HorizontalScrollbar && m_HorizontalScrollbarVisibility != ScrollbarVisibility.Permanent && m_HorizontalScrollbar.gameObject.activeSelf != hScrollingNeeded)
|
||
|
|
m_HorizontalScrollbar.gameObject.SetActive(hScrollingNeeded);
|
||
|
|
}
|
||
|
|
|
||
|
|
void UpdateScrollbarLayout()
|
||
|
|
{
|
||
|
|
if (m_VSliderExpand && m_HorizontalScrollbar)
|
||
|
|
{
|
||
|
|
m_Tracker.Add(this, m_HorizontalScrollbarRect,
|
||
|
|
DrivenTransformProperties.AnchorMinX |
|
||
|
|
DrivenTransformProperties.AnchorMaxX |
|
||
|
|
DrivenTransformProperties.SizeDeltaX |
|
||
|
|
DrivenTransformProperties.AnchoredPositionX);
|
||
|
|
m_HorizontalScrollbarRect.anchorMin = new Vector2(0, m_HorizontalScrollbarRect.anchorMin.y);
|
||
|
|
m_HorizontalScrollbarRect.anchorMax = new Vector2(1, m_HorizontalScrollbarRect.anchorMax.y);
|
||
|
|
m_HorizontalScrollbarRect.anchoredPosition = new Vector2(0, m_HorizontalScrollbarRect.anchoredPosition.y);
|
||
|
|
if (vScrollingNeeded)
|
||
|
|
m_HorizontalScrollbarRect.sizeDelta = new Vector2(-(m_VSliderWidth + m_VerticalScrollbarSpacing), m_HorizontalScrollbarRect.sizeDelta.y);
|
||
|
|
else
|
||
|
|
m_HorizontalScrollbarRect.sizeDelta = new Vector2(0, m_HorizontalScrollbarRect.sizeDelta.y);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_HSliderExpand && m_VerticalScrollbar)
|
||
|
|
{
|
||
|
|
m_Tracker.Add(this, m_VerticalScrollbarRect,
|
||
|
|
DrivenTransformProperties.AnchorMinY |
|
||
|
|
DrivenTransformProperties.AnchorMaxY |
|
||
|
|
DrivenTransformProperties.SizeDeltaY |
|
||
|
|
DrivenTransformProperties.AnchoredPositionY);
|
||
|
|
m_VerticalScrollbarRect.anchorMin = new Vector2(m_VerticalScrollbarRect.anchorMin.x, 0);
|
||
|
|
m_VerticalScrollbarRect.anchorMax = new Vector2(m_VerticalScrollbarRect.anchorMax.x, 1);
|
||
|
|
m_VerticalScrollbarRect.anchoredPosition = new Vector2(m_VerticalScrollbarRect.anchoredPosition.x, 0);
|
||
|
|
if (hScrollingNeeded)
|
||
|
|
m_VerticalScrollbarRect.sizeDelta = new Vector2(m_VerticalScrollbarRect.sizeDelta.x, -(m_HSliderHeight + m_HorizontalScrollbarSpacing));
|
||
|
|
else
|
||
|
|
m_VerticalScrollbarRect.sizeDelta = new Vector2(m_VerticalScrollbarRect.sizeDelta.x, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void UpdateBounds(bool updateItems = false)
|
||
|
|
{
|
||
|
|
m_ViewBounds = new Bounds(viewRect.rect.center, viewRect.rect.size);
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
|
||
|
|
if (m_Content == null)
|
||
|
|
return;
|
||
|
|
|
||
|
|
// ============LoopScrollRect============
|
||
|
|
// Don't do this in Rebuild
|
||
|
|
if (Application.isPlaying && updateItems && UpdateItems(m_ViewBounds, m_ContentBounds))
|
||
|
|
{
|
||
|
|
Canvas.ForceUpdateCanvases();
|
||
|
|
m_ContentBounds = GetBounds();
|
||
|
|
}
|
||
|
|
// ============LoopScrollRect============
|
||
|
|
|
||
|
|
// Make sure content bounds are at least as large as view by adding padding if not.
|
||
|
|
// One might think at first that if the content is smaller than the view, scrolling should be allowed.
|
||
|
|
// However, that's not how scroll views normally work.
|
||
|
|
// Scrolling is *only* possible when content is *larger* than view.
|
||
|
|
// We use the pivot of the content rect to decide in which directions the content bounds should be expanded.
|
||
|
|
// E.g. if pivot is at top, bounds are expanded downwards.
|
||
|
|
// This also works nicely when ContentSizeFitter is used on the content.
|
||
|
|
Vector3 contentSize = m_ContentBounds.size;
|
||
|
|
Vector3 contentPos = m_ContentBounds.center;
|
||
|
|
Vector3 excess = m_ViewBounds.size - contentSize;
|
||
|
|
if (excess.x > 0)
|
||
|
|
{
|
||
|
|
contentPos.x -= excess.x * (m_Content.pivot.x - 0.5f);
|
||
|
|
contentSize.x = m_ViewBounds.size.x;
|
||
|
|
}
|
||
|
|
if (excess.y > 0)
|
||
|
|
{
|
||
|
|
contentPos.y -= excess.y * (m_Content.pivot.y - 0.5f);
|
||
|
|
contentSize.y = m_ViewBounds.size.y;
|
||
|
|
}
|
||
|
|
|
||
|
|
m_ContentBounds.size = contentSize;
|
||
|
|
m_ContentBounds.center = contentPos;
|
||
|
|
}
|
||
|
|
|
||
|
|
private readonly Vector3[] m_Corners = new Vector3[4];
|
||
|
|
private Bounds GetBounds()
|
||
|
|
{
|
||
|
|
if (m_Content == null)
|
||
|
|
return new Bounds();
|
||
|
|
|
||
|
|
var vMin = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
|
||
|
|
var vMax = new Vector3(float.MinValue, float.MinValue, float.MinValue);
|
||
|
|
|
||
|
|
var toLocal = viewRect.worldToLocalMatrix;
|
||
|
|
m_Content.GetWorldCorners(m_Corners);
|
||
|
|
for (int j = 0; j < 4; j++)
|
||
|
|
{
|
||
|
|
Vector3 v = toLocal.MultiplyPoint3x4(m_Corners[j]);
|
||
|
|
vMin = Vector3.Min(v, vMin);
|
||
|
|
vMax = Vector3.Max(v, vMax);
|
||
|
|
}
|
||
|
|
|
||
|
|
var bounds = new Bounds(vMin, Vector3.zero);
|
||
|
|
bounds.Encapsulate(vMax);
|
||
|
|
return bounds;
|
||
|
|
}
|
||
|
|
|
||
|
|
private Bounds GetBounds4Item(int index)
|
||
|
|
{
|
||
|
|
if (m_Content == null)
|
||
|
|
return new Bounds();
|
||
|
|
|
||
|
|
var vMin = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
|
||
|
|
var vMax = new Vector3(float.MinValue, float.MinValue, float.MinValue);
|
||
|
|
|
||
|
|
var toLocal = viewRect.worldToLocalMatrix;
|
||
|
|
int offset = index - itemTypeStart;
|
||
|
|
if (offset < 0 || offset >= m_Content.childCount)
|
||
|
|
return new Bounds();
|
||
|
|
var rt = m_Content.GetChild(offset) as RectTransform;
|
||
|
|
if (rt == null)
|
||
|
|
return new Bounds();
|
||
|
|
rt.GetWorldCorners(m_Corners);
|
||
|
|
for (int j = 0; j < 4; j++)
|
||
|
|
{
|
||
|
|
Vector3 v = toLocal.MultiplyPoint3x4(m_Corners[j]);
|
||
|
|
vMin = Vector3.Min(v, vMin);
|
||
|
|
vMax = Vector3.Max(v, vMax);
|
||
|
|
}
|
||
|
|
|
||
|
|
var bounds = new Bounds(vMin, Vector3.zero);
|
||
|
|
bounds.Encapsulate(vMax);
|
||
|
|
return bounds;
|
||
|
|
}
|
||
|
|
|
||
|
|
private Vector2 CalculateOffset(Vector2 delta)
|
||
|
|
{
|
||
|
|
Vector2 offset = Vector2.zero;
|
||
|
|
if (m_MovementType == MovementType.Unrestricted)
|
||
|
|
return offset;
|
||
|
|
if (m_MovementType == MovementType.Clamped)
|
||
|
|
{
|
||
|
|
if (totalCount < 0)
|
||
|
|
return offset;
|
||
|
|
if (GetDimension(delta) < 0 && itemTypeStart > 0)
|
||
|
|
return offset;
|
||
|
|
if (GetDimension(delta) > 0 && itemTypeEnd < totalCount)
|
||
|
|
return offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
Vector2 min = m_ContentBounds.min;
|
||
|
|
Vector2 max = m_ContentBounds.max;
|
||
|
|
|
||
|
|
if (m_Horizontal)
|
||
|
|
{
|
||
|
|
min.x += delta.x;
|
||
|
|
max.x += delta.x;
|
||
|
|
if (min.x > m_ViewBounds.min.x)
|
||
|
|
offset.x = m_ViewBounds.min.x - min.x;
|
||
|
|
else if (max.x < m_ViewBounds.max.x)
|
||
|
|
offset.x = m_ViewBounds.max.x - max.x;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_Vertical)
|
||
|
|
{
|
||
|
|
min.y += delta.y;
|
||
|
|
max.y += delta.y;
|
||
|
|
if (max.y < m_ViewBounds.max.y)
|
||
|
|
offset.y = m_ViewBounds.max.y - max.y;
|
||
|
|
else if (min.y > m_ViewBounds.min.y)
|
||
|
|
offset.y = m_ViewBounds.min.y - min.y;
|
||
|
|
}
|
||
|
|
|
||
|
|
return offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected void SetDirty()
|
||
|
|
{
|
||
|
|
if (!IsActive())
|
||
|
|
return;
|
||
|
|
|
||
|
|
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected void SetDirtyCaching()
|
||
|
|
{
|
||
|
|
if (!IsActive())
|
||
|
|
return;
|
||
|
|
|
||
|
|
CanvasUpdateRegistry.RegisterCanvasElementForLayoutRebuild(this);
|
||
|
|
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if UNITY_EDITOR
|
||
|
|
protected override void OnValidate()
|
||
|
|
{
|
||
|
|
SetDirtyCaching();
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|