237 lines
8.3 KiB
C#
237 lines
8.3 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.UI;
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using UnityEngine.EventSystems;
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using TMPro;
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using System.Reflection;
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public class FocusPage : MonoBehaviour
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{
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[Header("页面焦点元素")]
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public List<Selectable> focusElements = new List<Selectable>();
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private int currentFocusIndex = -1;
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private Coroutine focusCoroutine;
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private bool isSwitchingFocus = false;
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private CustomTMPInputField currentCustomInputField;
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private CustomTMPDropdown currentCustomTMPDropdown;
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private bool isDropdownExpanded = false;
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public int FocusCount => focusElements.Count;
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public int CurrentFocusIndex => currentFocusIndex;
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public Selectable CurrentFocus => GetCurrentFocusElement();
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public bool HasPreviousFocus => currentFocusIndex > 0;
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public bool HasNextFocus => currentFocusIndex < FocusCount - 1;
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void OnEnable()
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{
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FocusManager.Instance?.SetCurrentPage(this);
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FindCustomComponents();
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ValidateFocusElements();
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if (FocusCount > 0) SetFocusImmediate(0);
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}
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private void FindCustomComponents()
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{
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focusElements.Clear();
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// 获取所有Selectable，包括隐藏的
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Selectable[] allSelectables = GetComponentsInChildren<Selectable>(true);
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foreach (var sel in allSelectables)
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{
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if (sel != null && sel.interactable)
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{
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focusElements.Add(sel);
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}
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}
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}
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void OnDisable()
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{
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if (FocusManager.Instance?.GetCurrentPage() == this) ClearFocus();
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}
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void Update()
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{
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CheckDropdownState();
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}
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#region 焦点切换
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public void FocusNext()
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{
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if (isSwitchingFocus) return;
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if (isDropdownExpanded) { DropdownSelectNext(); return; }
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if (currentFocusIndex + 1 < focusElements.Count) SetFocusDelayed(currentFocusIndex + 1);
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}
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public void FocusPrevious()
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{
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if (isSwitchingFocus) return;
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if (isDropdownExpanded) { DropdownSelectPrevious(); return; }
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if (currentFocusIndex - 1 >= 0) SetFocusDelayed(currentFocusIndex - 1);
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}
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public void FocusFirst() { if (!isSwitchingFocus && FocusCount > 0) SetFocusDelayed(0); }
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public void FocusLast() { if (!isSwitchingFocus && FocusCount > 0) SetFocusDelayed(FocusCount - 1); }
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public bool TryMoveToNext()
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{
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if (isSwitchingFocus || currentFocusIndex + 1 >= FocusCount) return false;
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SetFocusDelayed(currentFocusIndex + 1);
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return true;
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}
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public bool TryMoveToPrevious()
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{
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if (isSwitchingFocus || currentFocusIndex - 1 < 0) return false;
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SetFocusDelayed(currentFocusIndex - 1);
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return true;
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}
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#endregion
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#region 自定义组件访问
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public CustomTMPInputField GetCurrentCustomInputField() => currentCustomInputField;
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public void ActivateCurrentInputField() { currentCustomInputField?.Activate(); }
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public void DeactivateCurrentInputField() { currentCustomInputField?.Deactivate(); }
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public bool HasActiveInputField() => currentCustomInputField != null && currentCustomInputField.HasFocus();
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#endregion
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#region Dropdown
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public void DropdownSelectNext() { if (isDropdownExpanded) currentCustomTMPDropdown?.SelectNext(); }
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public void DropdownSelectPrevious() { if (isDropdownExpanded) currentCustomTMPDropdown?.SelectPrevious(); }
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public void DropdownSubmit() { if (isDropdownExpanded) currentCustomTMPDropdown?.SubmitSelection(); }
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public void DropdownToggle() { if (currentCustomTMPDropdown != null) { currentCustomTMPDropdown.ToggleDropdown(); StartCoroutine(UpdateDropdownNextFrame()); } }
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private IEnumerator UpdateDropdownNextFrame() { yield return null; CheckDropdownState(); FocusManager.Instance?.ForceUpdateButtonStates(); }
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public bool IsDropdownExpanded() => isDropdownExpanded;
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public bool IsOnDropdown() => currentCustomTMPDropdown != null;
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public string GetCurrentDropdownValue() => currentCustomTMPDropdown != null && currentCustomTMPDropdown.options.Count > 0 ? currentCustomTMPDropdown.options[currentCustomTMPDropdown.value].text : "";
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#endregion
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#region 内部焦点处理
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private void SetFocusImmediate(int index)
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{
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if (index < 0 || index >= focusElements.Count) return;
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ClearCurrentFocus();
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currentFocusIndex = index;
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Selectable target = focusElements[index];
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if (EventSystem.current != null)
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{
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EventSystem.current.SetSelectedGameObject(target.gameObject);
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HandleSpecialFocus(target, false);
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}
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FocusManager.Instance?.ForceUpdateButtonStates();
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}
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private void SetFocusDelayed(int index, float delay = 0.05f)
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{
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if (focusCoroutine != null) StopCoroutine(focusCoroutine);
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focusCoroutine = StartCoroutine(SetFocusCoroutine(index, delay));
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}
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private IEnumerator SetFocusCoroutine(int index, float delay)
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{
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if (isSwitchingFocus) yield break;
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isSwitchingFocus = true;
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yield return new WaitForSecondsRealtime(delay);
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if (index >= 0 && index < focusElements.Count)
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{
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ClearCurrentFocus();
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currentFocusIndex = index;
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Selectable target = focusElements[index];
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if (EventSystem.current != null && EventSystem.current.currentSelectedGameObject != target.gameObject)
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EventSystem.current.SetSelectedGameObject(target.gameObject);
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HandleSpecialFocus(target, true);
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}
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isSwitchingFocus = false;
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FocusManager.Instance?.ForceUpdateButtonStates();
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}
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private void ClearCurrentFocus()
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{
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currentCustomInputField?.Deactivate();
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CloseDropdown();
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currentCustomInputField = null;
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currentCustomTMPDropdown = null;
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isDropdownExpanded = false;
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}
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private void CloseDropdown()
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{
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if (currentCustomTMPDropdown != null)
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{
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currentCustomTMPDropdown.CloseDropdown();
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isDropdownExpanded = false;
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currentCustomTMPDropdown = null;
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}
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}
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private void HandleSpecialFocus(Selectable element, bool autoExpand)
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{
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switch (element)
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{
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case CustomTMPInputField customInputField:
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currentCustomInputField = customInputField;
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currentCustomTMPDropdown = null;
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isDropdownExpanded = false;
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customInputField.Activate();
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break;
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case CustomTMPDropdown customTMPDropdown:
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currentCustomTMPDropdown = customTMPDropdown;
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currentCustomInputField = null;
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if (autoExpand) StartCoroutine(DelayedExpandDropdown());
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break;
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default:
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currentCustomInputField = null;
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currentCustomTMPDropdown = null;
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isDropdownExpanded = false;
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break;
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}
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FocusManager.Instance?.ForceUpdateButtonStates();
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}
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private IEnumerator DelayedExpandDropdown()
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{
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yield return new WaitForSecondsRealtime(0.05f);
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currentCustomTMPDropdown?.OpenDropdown();
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isDropdownExpanded = true;
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}
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private void CheckDropdownState()
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{
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bool wasExpanded = isDropdownExpanded;
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if (currentCustomTMPDropdown != null)
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{
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var dropdownField = typeof(TMP_Dropdown).GetField("m_Dropdown", BindingFlags.NonPublic | BindingFlags.Instance);
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if (dropdownField != null)
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{
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var dropdownGO = dropdownField.GetValue(currentCustomTMPDropdown) as GameObject;
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isDropdownExpanded = dropdownGO != null && dropdownGO.activeInHierarchy;
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}
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else isDropdownExpanded = false;
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}
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else isDropdownExpanded = false;
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if (wasExpanded != isDropdownExpanded)
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FocusManager.Instance?.ForceUpdateButtonStates();
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}
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private Selectable GetCurrentFocusElement() => currentFocusIndex >= 0 && currentFocusIndex < focusElements.Count ? focusElements[currentFocusIndex] : null;
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public void ClearFocus()
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{
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focusElements.Clear();
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ClearCurrentFocus();
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currentFocusIndex = -1;
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if (EventSystem.current != null) EventSystem.current.SetSelectedGameObject(null);
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FocusManager.Instance?.ForceUpdateButtonStates();
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}
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private void ValidateFocusElements() => focusElements.RemoveAll(e => e == null || !e.interactable);
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#endregion
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}
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