概要

今回はInvenotrySlotにカーソルを合わせると説明欄を表示するようにします。

開発環境

IDE:Rider
Unity:2020.3.42(LTS)
OS:Windows10

UnityEditor上の設定

inventoryTextBoxプレハブの作成

InventoryTextBox

TextBoxImage(1)とTextBoxImage(2)を整列して並べるため、ContentSizeFitter Vertical LayoutGroupコンポーネントをアタッチします。

TextBoxImageBox(1) ‥(2)も同様の設定

Imageコンポーネントで背景の画像を追加
Text類を垂直方向に並べるためVerticalLayoutGroupコンポーネントを追加

UIInventorySlotのインスペクターの設定を行う。

実装のポイント

InventorySlotにカーソルを合わせて説明欄を表示させる

UIInventorySlotクラスにOnPointerEnterメソッドを加えます。
OnPointerEnterはオブジェクトがマウスーバーされた時に実行されるメソッドです。

UIInventoryTextBoxクラスを新規作成します。InventoryTextBoxのTextオブジェクトを更新するメソッドSetTextboxTextを加えます。

InventorySlotからカーソルを外して説明欄を消去する

UIInventorySlotクラスにOnPointerExitメソッドを加えます。
OnPointerExitはマウスオーバーされる時に実行されます。
処理内容としてはOnPointerEnterで生成したinventoryTextBoxを削除します。

コード部分

UIInventorySlot

UIInventorySlot.cs

using TMPro;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class UIInventorySlot : MonoBehaviour,IBeginDragHandler,IDragHandler,IEndDragHandler,IPointerEnterHandler,IPointerExitHandler
{
    private Camera mainCamera;
    private Canvas parentCanvas;
    private GameObject draggedItem;
    private Transform parentItem;
    
    public Image inventorySlotHighlight;
    public Image inventorySlotImage;
    public TextMeshProUGUI textMeshProUGUI;
    [SerializeField] private UIInventoryBar inventoryBar = null;
    [SerializeField] private GameObject inventoryTextBoxPrefab = null;
    public ItemDetails itemDetails;
    [SerializeField] private GameObject itemPrefab;
    public int itemQuantity;
    [SerializeField] private int slotNumber = 0;

    private void Awake()
    {
        parentCanvas = GetComponentInParent<Canvas>();
    }
    public void OnPointerEnter(PointerEventData eventData)
    {
        if (itemQuantity != 0)
        {
            inventoryBar.inventoryTextBoxGameObject = Instantiate(inventoryTextBoxPrefab, transform.position, Quaternion.identity);
            inventoryBar.inventoryTextBoxGameObject.transform.SetParent(parentCanvas.transform,false);

            UIInventoryTextBox inventoryTextBox = inventoryBar.inventoryTextBoxGameObject.GetComponent<UIInventoryTextBox>();
            
            string itemTypeDescription = InventoryManager.Instance.GetItemTypeDescription(itemDetails.itemType);
            
            inventoryTextBox.SetTextboxText(itemDetails.itemDescription, itemTypeDescription, "", itemDetails.itemLongDescription,"","");
            
            inventoryBar.inventoryTextBoxGameObject.GetComponent<RectTransform>().pivot = new Vector2(0.5f, 0f);
            inventoryBar.inventoryTextBoxGameObject.transform.position = new Vector3(transform.position.x, transform.position.y + 50f, transform.position.z);
        }
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        DestroyInventoryTextBox();
    }

    public void DestroyInventoryTextBox()
    {
        if (inventoryBar.inventoryTextBoxGameObject != null)
        {
            Destroy(inventoryBar.inventoryTextBoxGameObject);
        }
    }
    
    }

InventoryManager

InventoryManager.cs

using System.Collections.Generic;
using UnityEngine;


public class InventoryManager : SingletonMonobehaviour<InventoryManager>
{
    private Dictionary<int, ItemDetails> itemDetailDictionary;
    [SerializeField] private SO_ItemList itemList = null;
    public int[] inventoryListCapacityIntArray;
    public List<InventoryItem>[] inventoryLists;


    public string GetItemTypeDescription(ItemType itemType)
    {
        string itemTypeDescription;
        switch (itemType)
        {
            case ItemType.Breaking_tool:
                itemTypeDescription = Settings.BreakingTool;
                break;
            
            case ItemType.Chopping_tool:
                itemTypeDescription = Settings.ChoppingTool;
                break;
            
            case ItemType.Hoeing_tool:
                itemTypeDescription = Settings.HoeingTool;
                break;
            
            case ItemType.Reaping_tool:
                itemTypeDescription = Settings.ReapingTool;
                break;
            
            case ItemType.Watering_tool:
                itemTypeDescription = Settings.WateringTool;
                break;

            case ItemType.Collecting_tool:
                itemTypeDescription = Settings.CollectingTool;
                break;
            
            default:
                itemTypeDescription = itemType.ToString();
                break;
        }

        return itemTypeDescription;
    }   
}

UIInventoryTextBox

UIInventoryTextBox.cs

using TMPro;
using UnityEngine;
using UnityEngine.UI;


public class UIInventoryTextBox : MonoBehaviour
{
    [SerializeField] private TextMeshProUGUI textMeshTop1 = null;
    [SerializeField] private TextMeshProUGUI textMeshTop2 = null;
    [SerializeField] private TextMeshProUGUI textMeshTop3 = null;
    
    [SerializeField] private TextMeshProUGUI textMeshBottom1 = null;
    [SerializeField] private TextMeshProUGUI textMeshBottom2 = null;
    [SerializeField] private TextMeshProUGUI textMeshBottom3 = null;


    public void SetTextboxText(string textTop1, string textTop2, string textTop3, string textBottom1,
        string textBottom2, string textBottom3)
    {
        textMeshTop1.text = textTop1;
        textMeshTop2.text = textTop2;
        textMeshTop3.text = textTop3;
        textMeshBottom1.text = textBottom1;
        textMeshBottom2.text = textBottom2;
        textMeshBottom3.text = textBottom3;


    }
}

Enum

Enum.cs

public enum ItemType
{
    Seed,
    Commodity,
    Watering_tool,
    Hoeing_tool,
    Chopping_tool,
    Breaking_tool,
    Reaping_tool,
    Collecting_tool,
    Reapable_scenary,
    none,
    count,
    Furniture,
}

Settings

Settings.cs


using UnityEngine;

public static class Settings 
{
    public const string HoeingTool = "Hoe";
    public const string ChoppingTool = "Axe";
    public const string BreakingTool = "Pickaxe";
    public const string ReapingTool = "Scythe";
    public const string WateringTool = "Watering Can";
    public const string CollectingTool = "Basket";
}

参考

C#

Unity Editor コンポーネント

Content Size Fitter

Vetrical Layout Group

Unity スクリプト

OnPointerEnter

OnPointerExit

Transform.SetParent

RectTransform.pivot

その他

Section7 30 Item Description Pop Ups

github コミット分（個人確認用　privateなので見れません）