initial commit

Assets/Scripts/DraggableCard.cs

@@ -0,0 +1,63 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+using TMPro;
+
+
+public class DraggableCard : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
+{
+    public string layerName;
+
+    private RectTransform rectTransform;
+    private CanvasGroup canvasGroup;
+    private Vector2 startPosition;
+    private Transform startParent;
+    private Canvas canvas;
+
+    void Awake()
+    {
+        rectTransform = GetComponent<RectTransform>();
+        canvasGroup = GetComponent<CanvasGroup>();
+        if (canvasGroup == null)
+            canvasGroup = gameObject.AddComponent<CanvasGroup>();
+        canvas = GetComponentInParent<Canvas>();
+    }
+
+    void Start()
+    {
+        startPosition = rectTransform.anchoredPosition;
+        startParent = transform.parent;
+    }
+
+    public void OnBeginDrag(PointerEventData eventData)
+    {
+        if (transform.parent != startParent)
+        {
+            DropZone currentZone = transform.parent.GetComponent<DropZone>();
+            if (currentZone != null)
+                currentZone.currentCard = null;
+        }
+
+        transform.SetParent(canvas.transform);
+        transform.SetAsLastSibling();
+        canvasGroup.blocksRaycasts = false;
+    }
+
+    public void OnDrag(PointerEventData eventData)
+    {
+        rectTransform.anchoredPosition += eventData.delta / canvas.scaleFactor;
+    }
+
+    public void OnEndDrag(PointerEventData eventData)
+    {
+        canvasGroup.blocksRaycasts = true;
+        if (transform.parent == canvas.transform)
+            ReturnToOriginal();
+    }
+
+    public void ReturnToOriginal()
+    {
+        transform.SetParent(startParent);
+        rectTransform.anchoredPosition = startPosition;
+    }
+}