✨ Implement drag and drop

omg

blazor_lab/Components/Inventory.razor.cs

@@ -9,12 +9,9 @@ namespace blazor_lab.Components
     {
         [Inject]
         public IStringLocalizer<Inventory> Localizer { get; set; }
-
         [Parameter]
         public List<Item> Items { get; set; }
-
-        public InventoryModel? CurrentDragItem { get; set; }
-
+        public InventoryModel? CurrentDragItem { get; set; } = new();
         public List<InventoryModel> InventoryContent { get; set; } = Enumerable.Range(1, 18).Select(_ => new InventoryModel()).ToList();
     }
 }

blazor_lab/Components/InventoryItem.razor

@@ -1,7 +1,6 @@
 <div ondragover="event.preventDefault();"
      draggable="true"
      @ondragstart="@OnDragStart"
-     @ondragend="@OnDragEnd"
      @ondrop="@OnDrop">
     @if (Item is not null && IsInList)
     {
@@ -12,10 +11,12 @@
     }
     @if (InventoryModel is not null && IsInInventory)
     {
-        <div>
+        <div class="inventory-grid-item">
             @if (InventoryModel.NumberItem > 0)
             {
-                <div>@InventoryModel.ItemName</div>
+                <div class="slot-image">
+                    <img src="@($"data:image/png;base64,{InventoryModel.ImageBase64}")" alt="@InventoryModel.ItemName" />
+                </div>
             }
             <div class="slot-count">@InventoryModel.NumberItem</div>
         </div>

blazor_lab/Components/InventoryItem.razor.cs

@@ -1,9 +1,6 @@
-using blazor_lab.Services;
+using Blazorise.Extensions;
 using Microsoft.AspNetCore.Components;
-using Microsoft.AspNetCore.Components.Web;
-using Minecraft.Crafting.Api;
 using Minecraft.Crafting.Api.Models;
-using System.Diagnostics;
 using Item = blazor_lab.Models.Item;
 
 namespace blazor_lab.Components
@@ -28,14 +25,16 @@ namespace blazor_lab.Components
         [CascadingParameter]
         public Inventory? InventoryParent { get; set; }
 
-        public InventoryModel InventoryModel { get; set; } = new InventoryModel();
+        public InventoryModel? InventoryModel { get; set; } = new InventoryModel();
 
         public InventoryItem()
         {
-            if (Item is not null && IsInList)
+            if (IsInInventory)
             {
-                InventoryModel.ItemName = Item.DisplayName;
-                InventoryModel.NumberItem = 1;
+                InventoryModel.ImageBase64 = null;
+                InventoryModel.ItemName = "";
+                InventoryModel.NumberItem = 0;
+                InventoryModel.Position = Position;
             }
         }
 
@@ -43,15 +42,19 @@ namespace blazor_lab.Components
         {
             if (IsInList)
             {
+                ListParent!.Parent.CurrentDragItem = null;
                 return;
             }
 
             if (IsInInventory)
             {
-                if (InventoryModel.Position == -1) // new inventoryModel
+                InventoryModel ??= new();
+                if (InventoryModel.ItemName.IsNullOrEmpty()) // new inventoryModel
                 {
-                    InventoryModel = InventoryParent!.CurrentDragItem!;
+                    InventoryModel.ImageBase64 = InventoryParent!.CurrentDragItem!.ImageBase64;
+                    InventoryModel.ItemName = InventoryParent!.CurrentDragItem!.ItemName;
                     InventoryModel.Position = Position;
+                    InventoryModel.NumberItem = 1;
                     InventoryParent.InventoryContent.Insert(Position, InventoryModel);
                 }
                 else
@@ -61,34 +64,32 @@ namespace blazor_lab.Components
                         InventoryModel.NumberItem += 1;
                     }
                 }
-            }
-            StateHasChanged();
-        }
-
-        internal void OnDragEnd()
-        {
-            if (IsInList)
-            {
-                ListParent!.Parent.CurrentDragItem = null;
-            }
-            else if (IsInInventory)
-            {
                 InventoryParent!.CurrentDragItem = null;
             }
         }
 
         private void OnDragStart()
         {
-            if (InventoryModel is not null)
+            if (IsInList)
             {
-                if (IsInList)
+                ListParent!.Parent.CurrentDragItem = new InventoryModel
                 {
-                    ListParent!.Parent.CurrentDragItem = InventoryModel;
-                }
-                else if (IsInInventory)
+                    ImageBase64 = Item!.ImageBase64,
+                    ItemName = Item!.DisplayName,
+                    NumberItem = 1,
+                    Position = -1
+                };
+            }
+            else if (IsInInventory) // delete item stack if it is dragged from inventory
+            {
+                InventoryModel = new InventoryModel
                 {
-                    InventoryParent!.CurrentDragItem = InventoryModel;
-                }
+                    ImageBase64 = null,
+                    ItemName = "",
+                    NumberItem = 0,
+                    Position = Position
+                };
+                InventoryParent!.CurrentDragItem = null;
             }
         }
     }

blazor_lab/Components/InventoryItem.razor.css

@@ -12,6 +12,15 @@
         margin-right: 10px;
     }
 
+.slot-image {
+    font-weight : bold;
+    font-size: small;
+}
+
+.slot-count {
+    font-size: small;
+}
+
 .item-name {
     font-weight: bold;
 }