101 lines
3.2 KiB
C#
101 lines
3.2 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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public class DraggableUI : MonoBehaviour, IDragHandler, IBeginDragHandler
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{
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public static DraggableUI Instance;
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private Vector2 offset;
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public string uiName;
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public bool canDrag = false;
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private readonly List<GameObject> outlineSides = new();
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void CreateOutline()
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{
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var borderColor = Color.cyan;
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float thickness = 2f;
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CreateSide("Top", new Vector2(0, 1), new Vector2(1, 1), new Vector2(0, thickness), borderColor);
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CreateSide("Bottom", new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, thickness), borderColor);
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CreateSide("Left", new Vector2(0, 0), new Vector2(0, 1), new Vector2(thickness, 0), borderColor);
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CreateSide("Right", new Vector2(1, 0), new Vector2(1, 1), new Vector2(thickness, 0), borderColor);
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}
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void CreateSide(string name, Vector2 anchorMin, Vector2 anchorMax, Vector2 size, Color color)
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{
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var go = new GameObject(name, typeof(Image));
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go.transform.SetParent(transform, false);
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var rt = go.GetComponent<RectTransform>();
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var img = go.GetComponent<Image>();
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img.color = color;
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img.raycastTarget = false;
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rt.anchorMin = anchorMin;
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rt.anchorMax = anchorMax;
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rt.sizeDelta = size;
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rt.anchoredPosition = Vector2.zero;
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outlineSides.Add(go);
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}
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public void Awake()
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{
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Instance = this;
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CreateOutline();
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}
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public void OnEnable()
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{
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string key = "DraggedUI" + uiName;
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if (PlayerPrefs.HasKey(key) && TryParseVector3(PlayerPrefs.GetString(key), out Vector3 savedPos)) transform.localPosition = savedPos;
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}
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public void Update()
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{
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foreach (var side in outlineSides)
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side.SetActive(canDrag);
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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if (!canDrag) return;
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RectTransformUtility.ScreenPointToLocalPointInRectangle(
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(RectTransform)transform.parent,
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eventData.position,
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eventData.pressEventCamera,
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out offset
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);
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offset = (Vector2)transform.localPosition - offset;
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PlayerPrefs.SetString("DraggedUI" + uiName, transform.localPosition.ToString());
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (!canDrag) return;
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if (RectTransformUtility.ScreenPointToLocalPointInRectangle(
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(RectTransform)transform.parent,
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eventData.position,
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eventData.pressEventCamera,
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out Vector2 localPoint
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)) transform.localPosition = localPoint + offset;
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PlayerPrefs.SetString("DraggedUI" + uiName, transform.localPosition.ToString());
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}
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private bool TryParseVector3(string s, out Vector3 result)
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{
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s = s.Trim('(', ')');
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string[] parts = s.Split(',');
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if (parts.Length == 3 &&
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float.TryParse(parts[0], out float x) &&
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float.TryParse(parts[1], out float y) &&
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float.TryParse(parts[2], out float z))
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{
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result = new Vector3(x, y, z);
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return true;
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}
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result = Vector3.zero;
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return false;
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}
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} |