268 lines
9.2 KiB
C#
268 lines
9.2 KiB
C#
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using System;
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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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namespace AlicizaX.UI.Extension
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{
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public class UXSelectable :
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UIBehaviour,
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IMoveHandler,
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IPointerDownHandler, IPointerUpHandler,
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IPointerEnterHandler, IPointerExitHandler,
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ISelectHandler, IDeselectHandler
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{
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protected static UXSelectable[] s_Selectables = new UXSelectable[10];
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protected static int s_SelectableCount = 0;
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protected int m_CurrentIndex = -1;
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protected bool m_EnableCalled = false;
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protected bool isPointerInside { get; set; }
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protected bool isPointerDown { get; set; }
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protected bool hasSelection { get; set; }
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protected bool m_GroupsAllowInteraction = true;
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private readonly List<CanvasGroup> m_CanvasGroupCache = new List<CanvasGroup>();
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[SerializeField] private UXNavigation m_Navigation = UXNavigation.defaultNavigation;
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public UXNavigation navigation
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{
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get { return m_Navigation; }
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set { if (SetPropertyUtility.SetStruct(ref m_Navigation, value)) OnSetProperty(); }
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}
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public static UXSelectable[] allSelectablesArray
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{
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get
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{
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UXSelectable[] temp = new UXSelectable[s_SelectableCount];
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Array.Copy(s_Selectables, temp, s_SelectableCount);
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return temp;
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}
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}
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protected virtual void OnSetProperty()
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{
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// override if needed
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}
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protected override void OnEnable()
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{
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if (m_EnableCalled)
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return;
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base.OnEnable();
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if (s_SelectableCount == s_Selectables.Length)
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{
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UXSelectable[] temp = new UXSelectable[s_Selectables.Length * 2];
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Array.Copy(s_Selectables, temp, s_Selectables.Length);
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s_Selectables = temp;
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}
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if (EventSystem.current && EventSystem.current.currentSelectedGameObject == gameObject)
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{
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hasSelection = true;
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}
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m_CurrentIndex = s_SelectableCount;
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s_Selectables[m_CurrentIndex] = this;
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s_SelectableCount++;
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isPointerDown = false;
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m_GroupsAllowInteraction = ParentGroupAllowsInteraction();
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m_EnableCalled = true;
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}
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protected override void OnDisable()
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{
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if (!m_EnableCalled)
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return;
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s_SelectableCount--;
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s_Selectables[s_SelectableCount].m_CurrentIndex = m_CurrentIndex;
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s_Selectables[m_CurrentIndex] = s_Selectables[s_SelectableCount];
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s_Selectables[s_SelectableCount] = null;
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base.OnDisable();
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m_EnableCalled = false;
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}
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protected void OnCanvasGroupChanged()
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{
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var parentGroupAllows = ParentGroupAllowsInteraction();
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if (parentGroupAllows != m_GroupsAllowInteraction)
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{
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m_GroupsAllowInteraction = parentGroupAllows;
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OnSetProperty();
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}
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}
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protected bool ParentGroupAllowsInteraction()
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{
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Transform t = transform;
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while (t != null)
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{
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t.GetComponents(m_CanvasGroupCache);
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for (var i = 0; i < m_CanvasGroupCache.Count; i++)
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{
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if (m_CanvasGroupCache[i].enabled && !m_CanvasGroupCache[i].interactable)
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return false;
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if (m_CanvasGroupCache[i].ignoreParentGroups)
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return true;
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}
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t = t.parent;
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}
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return true;
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}
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public virtual bool IsInteractable()
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{
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return m_GroupsAllowInteraction;
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}
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public UXSelectable FindSelectable(Vector3 dir)
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{
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dir = dir.normalized;
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Vector3 localDir = Quaternion.Inverse(transform.rotation) * dir;
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Vector3 pos = transform.TransformPoint(GetPointOnRectEdge(transform as RectTransform, localDir));
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float maxScore = Mathf.NegativeInfinity;
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float maxFurthestScore = Mathf.NegativeInfinity;
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float score = 0;
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bool wantsWrapAround = navigation.wrapAround && (m_Navigation.mode == UXNavigation.Mode.Vertical || m_Navigation.mode == UXNavigation.Mode.Horizontal);
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UXSelectable bestPick = null;
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UXSelectable bestFurthestPick = null;
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for (int i = 0; i < s_SelectableCount; ++i)
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{
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UXSelectable sel = s_Selectables[i];
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if (sel == this)
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continue;
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if (!sel.IsInteractable() || sel.navigation.mode == UXNavigation.Mode.None)
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continue;
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#if UNITY_EDITOR
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if (Camera.current != null && !UnityEditor.SceneManagement.StageUtility.IsGameObjectRenderedByCamera(sel.gameObject, Camera.current))
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continue;
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#endif
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var selRect = sel.transform as RectTransform;
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Vector3 selCenter = selRect != null ? (Vector3)selRect.rect.center : Vector3.zero;
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Vector3 myVector = sel.transform.TransformPoint(selCenter) - pos;
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float dot = Vector3.Dot(dir, myVector);
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if (wantsWrapAround && dot < 0)
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{
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score = -dot * myVector.sqrMagnitude;
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if (score > maxFurthestScore)
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{
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maxFurthestScore = score;
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bestFurthestPick = sel;
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}
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continue;
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}
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if (dot <= 0)
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continue;
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score = dot / myVector.sqrMagnitude;
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if (score > maxScore)
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{
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maxScore = score;
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bestPick = sel;
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}
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}
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if (wantsWrapAround && null == bestPick) return bestFurthestPick;
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return bestPick;
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}
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private static Vector3 GetPointOnRectEdge(RectTransform rect, Vector2 dir)
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{
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if (rect == null) return Vector3.zero;
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if (dir != Vector2.zero) dir /= Mathf.Max(Mathf.Abs(dir.x), Mathf.Abs(dir.y));
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dir = rect.rect.center + Vector2.Scale(rect.rect.size, dir * 0.5f);
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return dir;
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}
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void Navigate(AxisEventData eventData, UXSelectable sel)
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{
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if (sel != null && sel.IsActive())
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eventData.selectedObject = sel.gameObject;
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}
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public virtual UXSelectable FindSelectableOnLeft()
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{
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if (m_Navigation.mode == UXNavigation.Mode.Explicit)
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return m_Navigation.selectOnLeft;
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if ((m_Navigation.mode & UXNavigation.Mode.Horizontal) != 0)
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return FindSelectable(transform.rotation * Vector3.left);
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return null;
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}
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public virtual UXSelectable FindSelectableOnRight()
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{
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if (m_Navigation.mode == UXNavigation.Mode.Explicit)
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return m_Navigation.selectOnRight;
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if ((m_Navigation.mode & UXNavigation.Mode.Horizontal) != 0)
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return FindSelectable(transform.rotation * Vector3.right);
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return null;
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}
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public virtual UXSelectable FindSelectableOnUp()
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{
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if (m_Navigation.mode == UXNavigation.Mode.Explicit)
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return m_Navigation.selectOnUp;
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if ((m_Navigation.mode & UXNavigation.Mode.Vertical) != 0)
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return FindSelectable(transform.rotation * Vector3.up);
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return null;
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}
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public virtual UXSelectable FindSelectableOnDown()
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{
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if (m_Navigation.mode == UXNavigation.Mode.Explicit)
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return m_Navigation.selectOnDown;
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if ((m_Navigation.mode & UXNavigation.Mode.Vertical) != 0)
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return FindSelectable(transform.rotation * Vector3.down);
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return null;
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}
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public virtual void OnMove(AxisEventData eventData)
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{
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switch (eventData.moveDir)
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{
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case MoveDirection.Right:
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Navigate(eventData, FindSelectableOnRight());
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break;
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case MoveDirection.Up:
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Navigate(eventData, FindSelectableOnUp());
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break;
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case MoveDirection.Left:
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Navigate(eventData, FindSelectableOnLeft());
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break;
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case MoveDirection.Down:
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Navigate(eventData, FindSelectableOnDown());
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break;
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}
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}
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// default handlers to be overridden
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public virtual void OnPointerDown(PointerEventData eventData) { }
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public virtual void OnPointerUp(PointerEventData eventData) { }
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public virtual void OnPointerEnter(PointerEventData eventData) { }
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public virtual void OnPointerExit(PointerEventData eventData) { }
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public virtual void OnSelect(BaseEventData eventData) { hasSelection = true; }
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public virtual void OnDeselect(BaseEventData eventData) { hasSelection = false; }
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}
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}
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