139 lines
4.2 KiB
C#
139 lines
4.2 KiB
C#
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;
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namespace Ashwild.Inventory
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{
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public class SlotUI : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler, IDropHandler, IPointerClickHandler
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{
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[Header("References")]
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[SerializeField] private Image iconImage;
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[SerializeField] private TextMeshProUGUI quantityText;
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[SerializeField] private Image highlightImage;
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private int slotIndex;
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private Action<int, int> onSwapRequested;
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private Action<int, bool> onClicked;
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public int SlotIndex => slotIndex;
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// Static drag state shared across all slots
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private static SlotUI draggedSlot;
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private static GameObject ghostObject;
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private static Image ghostIcon;
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private static TextMeshProUGUI ghostQuantity;
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public static void SetupGhost(GameObject ghost, Image icon, TextMeshProUGUI qty)
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{
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ghostObject = ghost;
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ghostIcon = icon;
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ghostQuantity = qty;
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ghostObject.SetActive(false);
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}
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public void Initialize(int index, Action<int, int> swapCallback, Action<int, bool> clickCallback)
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{
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slotIndex = index;
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onSwapRequested = swapCallback;
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onClicked = clickCallback;
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}
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public void UpdateVisual(InventorySlot slot)
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{
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if (slot == null || slot.IsEmpty)
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{
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iconImage.gameObject.SetActive(false);
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quantityText.gameObject.SetActive(false);
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}
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else
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{
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iconImage.gameObject.SetActive(true);
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iconImage.sprite = slot.ItemData.Icon;
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bool showQty = slot.Quantity > 1;
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quantityText.gameObject.SetActive(showQty);
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if (showQty)
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quantityText.text = slot.Quantity.ToString();
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}
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}
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public void SetSelected(bool selected)
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{
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if (highlightImage != null)
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highlightImage.gameObject.SetActive(selected);
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}
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// Drag & Drop
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public void OnBeginDrag(PointerEventData eventData)
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{
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if (eventData.button != PointerEventData.InputButton.Left) return;
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InventorySlot slot = PlayerInventory.Instance.GetSlot(slotIndex);
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if (slot == null || slot.IsEmpty) return;
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draggedSlot = this;
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// Show ghost
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if (ghostObject != null)
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{
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ghostObject.SetActive(true);
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ghostIcon.sprite = slot.ItemData.Icon;
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ghostIcon.gameObject.SetActive(true);
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bool showQty = slot.Quantity > 1;
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ghostQuantity.gameObject.SetActive(showQty);
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if (showQty)
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ghostQuantity.text = slot.Quantity.ToString();
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ghostObject.transform.position = eventData.position;
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}
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// Make source icon semi-transparent
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Color c = iconImage.color;
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c.a = 0.4f;
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iconImage.color = c;
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (draggedSlot != this) return;
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if (ghostObject != null)
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ghostObject.transform.position = eventData.position;
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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if (draggedSlot != this) return;
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// Hide ghost
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if (ghostObject != null)
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ghostObject.SetActive(false);
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// Restore icon opacity
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Color c = iconImage.color;
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c.a = 1f;
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iconImage.color = c;
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draggedSlot = null;
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}
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public void OnDrop(PointerEventData eventData)
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{
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if (draggedSlot == null || draggedSlot == this) return;
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onSwapRequested?.Invoke(draggedSlot.SlotIndex, slotIndex);
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}
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public void OnPointerClick(PointerEventData eventData)
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{
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if (eventData.dragging) return;
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if (eventData.button == PointerEventData.InputButton.Right)
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onClicked?.Invoke(slotIndex, true);
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}
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}
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}
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