Add draggable UI to game player

2025-06-25 00:58:26 -07:00
parent 73822ebb94
commit 2aed4e416a
4 changed files with 718 additions and 0 deletions
--- a/Assets/Scripts/DraggableUI.cs
+++ b/Assets/Scripts/DraggableUI.cs
@@ -0,0 +1,103 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+using TMPro;
+using UnityEngine.UI;
+using System.Collections.Generic;
+
+public class DraggableUI : MonoBehaviour, IDragHandler, IBeginDragHandler
+{
+    public static DraggableUI Instance;
+    private Vector2 offset;
+    public string uiName;
+    public bool canDrag = false;
+
+    private readonly List<GameObject> outlineSides = new();
+
+    void CreateOutline()
+    {
+        var borderColor = Color.cyan;
+        float thickness = 2f;
+
+        CreateSide("Top", new Vector2(0, 1), new Vector2(1, 1), new Vector2(0, thickness), borderColor);
+        CreateSide("Bottom", new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, thickness), borderColor);
+        CreateSide("Left", new Vector2(0, 0), new Vector2(0, 1), new Vector2(thickness, 0), borderColor);
+        CreateSide("Right", new Vector2(1, 0), new Vector2(1, 1), new Vector2(thickness, 0), borderColor);
+    }
+
+    void CreateSide(string name, Vector2 anchorMin, Vector2 anchorMax, Vector2 size, Color color)
+    {
+        var go = new GameObject(name, typeof(Image));
+        go.transform.SetParent(transform, false);
+        var rt = go.GetComponent<RectTransform>();
+        var img = go.GetComponent<Image>();
+        img.color = color;
+        img.raycastTarget = false;
+
+        rt.anchorMin = anchorMin;
+        rt.anchorMax = anchorMax;
+        rt.sizeDelta = size;
+        rt.anchoredPosition = Vector2.zero;
+
+        outlineSides.Add(go);
+    }
+
+    public void Awake()
+    {
+        Instance = this;
+        CreateOutline();
+    }
+
+    public void OnEnable()
+    {
+        string key = "DraggedUI" + uiName;
+        if (PlayerPrefs.HasKey(key) && TryParseVector3(PlayerPrefs.GetString(key), out Vector3 savedPos))
+            transform.localPosition = savedPos;
+    }
+
+    public void Update()
+    {
+        foreach (var side in outlineSides)
+            side.SetActive(canDrag);
+    }
+
+    public void OnBeginDrag(PointerEventData eventData)
+    {
+        if (!canDrag) return;
+        RectTransformUtility.ScreenPointToLocalPointInRectangle(
+            (RectTransform)transform.parent,
+            eventData.position,
+            eventData.pressEventCamera,
+            out offset
+        );
+        offset = (Vector2)transform.localPosition - offset;
+        PlayerPrefs.SetString("DraggedUI" + uiName, transform.localPosition.ToString());
+    }
+
+    public void OnDrag(PointerEventData eventData)
+    {
+        if (!canDrag) return;
+        if (RectTransformUtility.ScreenPointToLocalPointInRectangle(
+            (RectTransform)transform.parent,
+            eventData.position,
+            eventData.pressEventCamera,
+            out Vector2 localPoint
+        )) transform.localPosition = localPoint + offset;
+        PlayerPrefs.SetString("DraggedUI" + uiName, transform.localPosition.ToString());
+    }
+
+    private bool TryParseVector3(string s, out Vector3 result)
+    {
+        s = s.Trim('(', ')');
+        string[] parts = s.Split(',');
+        if (parts.Length == 3 &&
+            float.TryParse(parts[0], out float x) &&
+            float.TryParse(parts[1], out float y) &&
+            float.TryParse(parts[2], out float z))
+        {
+            result = new Vector3(x, y, z);
+            return true;
+        }
+        result = Vector3.zero;
+        return false;
+    }
+}