Add list view basics

Assets/Prefabs/ListViewItem.prefab.meta

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Assets/Prefabs/ListViewItemSingle.prefab.meta

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Assets/Scripts/Shop/View/ShopViewList.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Security.Permissions;
+using UnityEngine;
+using UnityEngine.Assertions;
+using UnityEngine.UI;
+
+/// <summary>
+/// This view is meant to be used in conjunction with a list. Realistically, it is mostly similar to the grid view,
+/// as both operate with prototypes!
+/// </summary>
+public class ShopViewList : ShopView
+{
+    private VerticalLayoutGroup _listLayoutGroup;    // This is essentially just a reference to ShopView's layout group but with the correct type
+    
+    //protected ViewConfig viewConfig; //To set up the grid view, we need to know how many columns the grid view has, in the current setup,
+    //this information can be found in a ViewConfig scriptable object, which serves as a configuration file for
+    //views.
+    
+    // Start is called before the first frame update
+    protected override void Awake()
+    {
+        //iewConfig = Resources.Load<ViewConfig>("ViewConfig");//Load the ViewConfig scriptable object from the Resources folder
+        //Debug.Assert(viewConfig != null);
+        Debug.Assert(_listLayoutGroup != null);
+        base.Awake();
+        print("ShopView Grid Initialised");
+    }
+
+    protected override void SetupItemIconView()
+    {
+        //_listLayoutGroup.constraint = GridLayoutGroup.Constraint.FixedColumnCount;//Set the constraint mode of the GridLayoutGroup
+        //_listLayoutGroup.constraintCount = viewConfig.gridViewColumnCount; //Set the column count according to the ViewConfig object
+        // Do we set up anything at all here?
+    }
+
+    protected override void ClearIconView()
+    {
+        Transform[] allIcons = layoutGroup.transform.GetComponentsInChildren<Transform>();
+        foreach (Transform child in allIcons) {
+            if (child != layoutGroup.transform) {
+                Destroy(child.gameObject);
+            }
+        }
+    }
+
+    protected override void AddItemToView(Item item)
+    {
+        GameObject newItemIcon = GameObject.Instantiate(itemPrefab, layoutGroup.transform, true);
+        newItemIcon.transform.localScale = Vector3.one;//The scale would automatically change in Unity so we set it back to Vector3.one.
+
+        ViewItemContainer itemContainer = newItemIcon.GetComponent<ViewItemContainer>();
+        Debug.Assert(itemContainer != null);
+        //bool isSelected = (item == model.GetSelectedItem());
+        var unsub = model.RegisterObserver(itemContainer);
+        itemContainer.Initialize(item,unsub);
+        print("Attempt to add item " + item.name + " to view");
+    }
+
+    protected override void RemoveItemFromView(Item item)
+    {
+        var items = layoutGroup.transform.GetComponentsInChildren<ViewItemContainer>();
+        foreach (var itemView in items)
+        {
+            if (itemView.Item == item)
+            {
+                model.RemoveObserver(itemView);
+                Destroy(itemView.gameObject);
+                return;
+            }
+        }
+    }
+
+    private void OnValidate()
+    {
+        _listLayoutGroup = (VerticalLayoutGroup) layoutGroup;
+        bool correctLayout = _listLayoutGroup != null;
+        if(!correctLayout) Debug.LogError("Layout group is not of type Vertical!",this);
+        //else Debug.Log("Grid shop view validated",this);
+    }
+}

Assets/Scripts/Shop/View/ShopViewList.cs.meta

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