86 lines
3.4 KiB
C#
86 lines
3.4 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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using TMPro;
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[RequireComponent(typeof(RectTransform))]
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public class HintWindowController : MonoBehaviour
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{
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[SerializeField] private TextMeshProUGUI _text;
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[SerializeField] private Vector2 _padding = new Vector2(16, 10);
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[SerializeField] private Vector2 _anchorOffset = new Vector2(16, 16);
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private RectTransform _selfRt;
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private Canvas _rootCanvas;
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private Camera _uiCamera;
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private void Awake()
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{
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_selfRt = (RectTransform)transform;
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_rootCanvas = GetComponentInParent<Canvas>();
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_uiCamera = _rootCanvas.worldCamera;
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// 兜底找 Text
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if (_text == null)
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_text = GetComponentInChildren<TextMeshProUGUI>(true);
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if (_text == null)
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Debug.LogError("[HintWindowController] 找不到 TextMeshProUGUI！", this);
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}
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public void Present(Vector2 mouseScreenPos)
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{
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if (_text == null) return;
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RefreshSize();
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ClampToScreen(mouseScreenPos);
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}
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public void RefreshSize()
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{
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_text.ForceMeshUpdate(false, false);
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LayoutRebuilder.ForceRebuildLayoutImmediate(_text.rectTransform);
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float w = _text.preferredWidth + _padding.x * 2f;
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float h = _text.preferredHeight + _padding.y * 2f;
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_selfRt.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, w);
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_selfRt.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, h);
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Canvas.ForceUpdateCanvases();
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}
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private void ClampToScreen(Vector2 mouseScreenPos)
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{
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// 1. 获取 Canvas 的缩放因子，这是解决打包后问题的关键
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float scaleFactor = _rootCanvas.scaleFactor;
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if (scaleFactor <= 0) scaleFactor = 1f; // 极端情况下的保护
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// 2. 计算提示窗口在屏幕上的实际像素尺寸
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float windowW = _selfRt.rect.width * scaleFactor;
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float windowH = _selfRt.rect.height * scaleFactor;
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// 3. 计算窗口左上角假想的屏幕坐标 (这里逻辑保持不变)
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Vector2 desiredTopLeft = mouseScreenPos + _anchorOffset;
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// 4. 修正：将假想的左上角位置限制在屏幕范围内
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// 使用 Screen.width 和 Screen.height 更直接
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float clampedX = Mathf.Clamp(desiredTopLeft.x, 0, Screen.width - windowW);
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float clampedY = Mathf.Clamp(desiredTopLeft.y, windowH, Screen.height); // Y坐标从下到上，所以下边界是windowH
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// 5. 关键修正：根据Pivot计算最终实际要设置的屏幕坐标点
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// 我们已经得到了窗口内容左上角的正确位置(clampedX, clampedY)。
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// 现在需要反推出在这种情况下，窗口的Pivot应该在屏幕的哪个坐标。
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Vector2 pivot = _selfRt.pivot;
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Vector2 pivotScreenPos = new Vector2(
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clampedX + pivot.x * windowW,
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clampedY - (1 - pivot.y) * windowH
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);
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// 6. 将计算出的Pivot屏幕坐标转换为Canvas的局部坐标
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RectTransform canvasRt = _rootCanvas.GetComponent<RectTransform>();
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RectTransformUtility.ScreenPointToLocalPointInRectangle(
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canvasRt,
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pivotScreenPos,
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_uiCamera, // 即使_uiCamera为null (Overlay模式)，此方法依然有效
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out Vector2 localPos);
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// 7. 设置最终位置
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_selfRt.localPosition = localPos;
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_selfRt.SetAsLastSibling();
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}
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}
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