🚧 WIP

* move grid to Inventory component itself
* partly enable dragging and dropping

blazor_lab/Components/Inventory.razor

@@ -1,12 +1,25 @@
-@using blazor_lab.Components
+<CascadingValue Value="@this">
 
     <div class="side-by-side">
-    <div>
+
-        <h2>@Localizer["my_inventory"]</h2>
+        <div class="inventory-grid">
-        <InventoryGrid Items="Items" />
+            @for (int row = 0; row < 3; row++) { <div class="inventory-row">
+                @for (int col = 0; col < 6; col++) { <div class="inventory-slot">
+                    @if (InventoryContent != null && InventoryContent.Count > (row * 6 + col))
+                    {
+                        <InventoryItem Position="(row * 6 + col)" IsInList="false" IsInInventory="true"/>
+                    }
+                    </div>
+                }
+                </div>
+            }
             </div>
+
             <div>
                 <h2>@Localizer["list_of_items"]</h2>
                 <InventoryList Items="Items" />
             </div>
+
        </div>
+
+</CascadingValue>

blazor_lab/Components/Inventory.razor.cs

@@ -1,6 +1,7 @@
-using blazor_lab.Models;
+using Microsoft.AspNetCore.Components;
-using Microsoft.AspNetCore.Components;
 using Microsoft.Extensions.Localization;
+using Minecraft.Crafting.Api.Models;
+using Item = blazor_lab.Models.Item;
 
 namespace blazor_lab.Components
 {
@@ -10,6 +11,10 @@ namespace blazor_lab.Components
         public IStringLocalizer<Inventory> Localizer { get; set; }
 
         [Parameter]
-        public List<Item> Items { get; set; } = new();
+        public List<Item> Items { get; set; }
+
+        public InventoryModel? CurrentDragItem { get; set; }
+
+        public List<InventoryModel> InventoryContent { get; set; } = Enumerable.Range(1, 18).Select(_ => new InventoryModel()).ToList();
     }
 }

blazor_lab/Components/Inventory.razor.css

@@ -2,3 +2,24 @@
     display: flex;
     flex-direction: row;
 }
+
+.inventory-grid {
+    display: flex;
+    flex-direction: column;
+}
+
+.inventory-row {
+    display: flex;
+    flex-direction: row;
+}
+
+.inventory-slot {
+    width: 64px;
+    height: 64px;
+    border: 1px solid;
+    margin: 5px;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    overflow: hidden;
+}

blazor_lab/Components/InventoryGrid.razor

@@ -1,21 +0,0 @@
-<div class="inventory-grid">
-    @for (int row = 0; row < 3; row++)
-    {
-        <div class="inventory-row">
-            @for (int col = 0; col < 6; col++)
-            {
-                <div class="inventory-slot">
-                    @if (Inventory != null && Inventory.Count > (row * 6 + col))
-                    {
-                        var slot = Inventory[row * 6 + col];
-                        @if (slot.NumberItem > 0)
-                        {
-                            <img src="@($"data:image/png;base64,{GetItemImageBase64(@slot.ItemName)}")" alt="@slot.ItemName" />
-                            <div class="slot-count">@slot.NumberItem</div>
-                        }
-                    }
-                </div>
-            }
-        </div>
-    }
-</div>

blazor_lab/Components/InventoryGrid.razor.cs

@@ -1,25 +0,0 @@
-using Microsoft.AspNetCore.Components;
-using Minecraft.Crafting.Api.Models;
-
-
-namespace blazor_lab.Components
-{
-
-    public partial class InventoryGrid
-    {
-        public List<InventoryModel> Inventory { get; set; } = Enumerable.Range(1, 18).Select(_ => new InventoryModel()).ToList();
-
-        /// <summary>
-        /// Used by GetItemImageBase64 in this component, rather than calling our DataService every time.
-        /// A very basic cache, not kept up to date in any way, but event listeners could be set up in the future
-        /// </summary>
-        [Parameter]
-        public List<Models.Item> Items { get; set; }
-
-        public string GetItemImageBase64(string displayName)
-        {
-            var item = Items.FirstOrDefault(i => i.DisplayName == displayName);
-            return item?.ImageBase64;
-        }
-    }
-}

blazor_lab/Components/InventoryGrid.razor.css

@@ -1,25 +0,0 @@
-.inventory-grid {
-    display: flex;
-    flex-direction: column;
-}
-
-.inventory-row {
-    display: flex;
-    flex-direction: row;
-}
-
-.inventory-slot {
-    width: 64px;
-    height: 64px;
-    border: 1px solid;
-    margin: 5px;
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    overflow: hidden;
-}
-
-
-.item-count {
-    margin-top: 5px;
-}

blazor_lab/Components/InventoryItem.razor

@@ -0,0 +1,20 @@
+<div ondragover="event.preventDefault();"
+     draggable="true"
+     @ondragstart="@OnDragStart"
+     @ondragend="@OnDragEnd"
+     @ondrop="@OnDrop">
+    @if (Item is not null && IsInList)
+    {
+        <div class="inventory-list-item side-by-side">
+            <img src="@($"data:image/png;base64,{Item.ImageBase64}")" alt="@Item.DisplayName" />
+            <div class="item-name">@Item.DisplayName</div>
+        </div>
+    }
+    @if (InventoryModel is not null && IsInInventory)
+    {
+        <div>
+            <img src="@($" data:image/png;base64,{GetItemImageBase64()}")" alt="@InventoryModel.ItemName" />
+            <div class="slot-count">@InventoryModel.NumberItem</div>
+        </div>
+    }
+</div>

blazor_lab/Components/InventoryItem.razor.cs

@@ -0,0 +1,109 @@
+using blazor_lab.Services;
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Web;
+using Minecraft.Crafting.Api.Models;
+using System.Diagnostics;
+using Item = blazor_lab.Models.Item;
+
+namespace blazor_lab.Components
+{
+    public partial class InventoryItem
+    {
+        [Parameter]
+        public Item? Item { get; set; }
+
+        [Parameter]
+        public int Position { get; set; } = -1;
+
+        [Parameter]
+        public bool IsInList { get; set; }
+
+        [Parameter]
+        public bool IsInInventory { get; set; }
+
+        [CascadingParameter]
+        public InventoryList? ListParent { get; set; }
+
+        [CascadingParameter]
+        public Inventory? InventoryParent { get; set; }
+
+        [Inject]
+        public IDataService DataService { get; set; }
+
+        public InventoryModel InventoryModel { get; set; } = new InventoryModel();
+
+        public InventoryItem()
+        {
+            if (Item is not null && IsInList)
+            {
+                InventoryModel.ItemName = Item.DisplayName;
+                InventoryModel.NumberItem = 1;
+            }
+        }
+
+        internal void OnDrop()
+        {
+            if (IsInList)
+            {
+                return;
+            }
+
+            if (IsInInventory)
+            {
+                if (InventoryModel.Position == -1) // new inventoryModel
+                {
+                    InventoryModel = InventoryParent!.CurrentDragItem!;
+                    InventoryModel.Position = Position;
+                    InventoryParent.InventoryContent.Add(InventoryModel);
+                }
+                else
+                {
+                    if (InventoryModel.ItemName == InventoryParent!.CurrentDragItem!.ItemName) // adding to an existing stack
+                    {
+                        InventoryModel.NumberItem += 1;
+                    }
+                }
+            }
+        }
+
+        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)
+                {
+                    ListParent!.Parent.CurrentDragItem = InventoryModel;
+                }
+                else if (IsInInventory)
+                {
+                    InventoryParent!.CurrentDragItem = InventoryModel;
+                }
+            }
+        }
+
+        public async Task<string?> GetItemImageBase64()
+        {
+            // FIXME probably not great to inject a service in each item and query the whole database everytime we display it
+
+            if (InventoryParent is not null)
+            {
+                return (await DataService.List(0, await DataService.Count()))
+                                .FirstOrDefault(i => i.DisplayName == InventoryModel.ItemName)?
+                                .ImageBase64;
+            }
+            else return null;
+        }
+    }
+}

blazor_lab/Components/InventoryItem.razor.css

@@ -0,0 +1,22 @@
+.inventory-list-item {
+    margin-bottom: 10px;
+    padding: 10px;
+    border: 1px solid #ddd;
+    border-radius: 5px;
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
+}
+
+    .inventory-list-item img {
+        max-width: 64px;
+        max-height: 64px;
+        margin-right: 10px;
+    }
+
+.item-name {
+    font-weight: bold;
+}
+
+.side-by-side {
+    display: flex;
+    flex-direction: row;
+}

blazor_lab/Components/InventoryList.razor

@@ -1,4 +1,6 @@
-<div class="inventory-list">
+<CascadingValue Value="@this">
+
+<div class="inventory-list">
     <div class="search-container">
         <input type="text" value="@searchQuery" @oninput="OnInputChange" placeholder="@Localizer["search_label"]" />
     </div>
@@ -14,10 +16,7 @@
     <div class="inventory-list-items">
             @foreach (var item in VisibleItems)
             {
-            <div class="inventory-list-item side-by-side">
+                <InventoryItem Item=item IsInList="true" IsInInventory="false"></InventoryItem>
-                <img src="@($"data:image/png;base64,{item.ImageBase64}")" alt="@item.DisplayName" />
-                <div class="item-name">@item.DisplayName</div>
-            </div>
             }
     </div>
 
@@ -41,3 +40,5 @@
             }
     </div>
 </div>
+
+</CascadingValue>

blazor_lab/Components/InventoryList.razor.cs

@@ -11,6 +11,9 @@ namespace blazor_lab.Components
     }
     public partial class InventoryList
     {
+        [CascadingParameter] 
+        public Inventory Parent { get; set; }
+
         [Inject]
         public IStringLocalizer<InventoryList> Localizer { get; set; }
 

blazor_lab/Components/InventoryList.razor.css

@@ -5,31 +5,3 @@
 .search-container {
     margin-bottom: 20px;
 }
-
-.inventory-list-item {
-    margin-bottom: 10px;
-    padding: 10px;
-    border: 1px solid #ddd;
-    border-radius: 5px;
-    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
-}
-
-    .inventory-list-item img {
-        max-width: 64px;
-        max-height: 64px;
-        margin-right: 10px;
-    }
-
-.item-name {
-    font-weight: bold;
-}
-
-.side-by-side {
-    display: flex;
-    flex-direction: row;
-}
-
-button[disabled] {
-    opacity: 0.5;
-    cursor: default;
-}