From 93d1e8604ac1be886fea63b0ab355dfafce6cf5b Mon Sep 17 00:00:00 2001
From: Vladimir Enchev <vladimir.enchev@gmail.com>
Date: Fri, 6 Dec 2024 10:36:26 +0200
Subject: [PATCH] PickList ItemRender event added

---
 Radzen.Blazor/Common.cs                      | 31 ++++++++++++++++--
 Radzen.Blazor/RadzenPickList.razor           |  4 +--
 Radzen.Blazor/RadzenPickList.razor.cs        | 33 ++++++++++++++++++++
 RadzenBlazorDemos/Pages/PickListConfig.razor | 26 +++++++++------
 4 files changed, 79 insertions(+), 15 deletions(-)

diff --git a/Radzen.Blazor/Common.cs b/Radzen.Blazor/Common.cs
index 70f2ebb206e..f8b09cb6fbe 100644
--- a/Radzen.Blazor/Common.cs
+++ b/Radzen.Blazor/Common.cs
@@ -557,7 +557,6 @@ public class RadzenDropZoneItemRenderEventArgs<TItem>
         /// Gets or sets a value indicating whether this item is visible.
         /// </summary>
         /// <value><c>true</c> if visible; otherwise, <c>false</c>.</value>
-        [Parameter]
         public bool Visible { get; set; } = true;
 
         /// <summary>
@@ -580,14 +579,12 @@ public class DropDownBaseItemRenderEventArgs<TValue>
         /// Gets or sets a value indicating whether this item is visible.
         /// </summary>
         /// <value><c>true</c> if visible; otherwise, <c>false</c>.</value>
-        [Parameter]
         public bool Visible { get; set; } = true;
 
         /// <summary>
         /// Gets or sets a value indicating whether this item is visible.
         /// </summary>
         /// <value><c>true</c> if visible; otherwise, <c>false</c>.</value>
-        [Parameter]
         public bool Disabled { get; set; }
 
         /// <summary>
@@ -618,6 +615,34 @@ public class ListBoxItemRenderEventArgs<TValue> : DropDownBaseItemRenderEventArg
         public RadzenListBox<TValue> ListBox { get; internal set; }
     }
 
+    /// <summary>
+    /// Supplies information about RadzenPickList ItemRender event.
+    /// </summary>
+    public class PickListItemRenderEventArgs<TItem>
+    {
+        /// <summary>
+        /// Gets the data item.
+        /// </summary>
+        public TItem Item { get; internal set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether this item is visible.
+        /// </summary>
+        /// <value><c>true</c> if visible; otherwise, <c>false</c>.</value>
+        public bool Visible { get; set; } = true;
+
+        /// <summary>
+        /// Gets or sets a value indicating whether this item is visible.
+        /// </summary>
+        /// <value><c>true</c> if visible; otherwise, <c>false</c>.</value>
+        public bool Disabled { get; set; }
+
+        /// <summary>
+        /// Gets or sets the row HTML attributes.
+        /// </summary>
+        public IDictionary<string, object> Attributes { get; private set; } = new Dictionary<string, object>();
+    }
+
     /// <summary>
     /// Supplies information about a <see cref="RadzenDatePicker{TValue}.DateRender" /> event that is being raised.
     /// </summary>
diff --git a/Radzen.Blazor/RadzenPickList.razor b/Radzen.Blazor/RadzenPickList.razor
index 25a299993c6..c17928dd6fe 100644
--- a/Radzen.Blazor/RadzenPickList.razor
+++ b/Radzen.Blazor/RadzenPickList.razor
@@ -13,7 +13,7 @@
                 }
                 <RadzenListBox @bind-Value=@selectedSourceItems Data="@source" Multiple="@Multiple" @bind-SearchText=@sourceSearchText
                     FilterAsYouType=true FilterCaseSensitivity=FilterCaseSensitivity.CaseInsensitive
-                    TextProperty="@TextProperty" AllowFiltering=@AllowFiltering
+                    TextProperty="@TextProperty" AllowFiltering=@AllowFiltering ItemRender="@OnSourceItemRender"
                     Template=@ListBoxTemplate Placeholder="@(SourcePlaceholder ?? Placeholder)"
                     Disabled=@(Disabled || Source == null || (Source != null && !Source.Any()))
                 />
@@ -35,7 +35,7 @@
                 }
                 <RadzenListBox @bind-Value=@selectedTargetItems Data="@target" Multiple="@Multiple" @bind-SearchText=@targetSearchText
                     FilterAsYouType=true FilterCaseSensitivity=FilterCaseSensitivity.CaseInsensitive
-                    TextProperty="@TextProperty" AllowFiltering=@AllowFiltering
+                    TextProperty="@TextProperty" AllowFiltering=@AllowFiltering ItemRender="@OnTargetItemRender"
                     Template=@ListBoxTemplate Placeholder="@(TargetPlaceholder ?? Placeholder)"
                     Disabled=@(Disabled || Target == null|| (Target != null && !Target.Any()))
                 />
diff --git a/Radzen.Blazor/RadzenPickList.razor.cs b/Radzen.Blazor/RadzenPickList.razor.cs
index 71de5d6d5c3..d2091d6dcce 100644
--- a/Radzen.Blazor/RadzenPickList.razor.cs
+++ b/Radzen.Blazor/RadzenPickList.razor.cs
@@ -98,6 +98,39 @@ public partial class RadzenPickList<TItem> : RadzenComponent
         [Parameter]
         public RenderFragment<TItem> Template { get; set; }
 
+        /// <summary>
+        /// Gets or sets the row render callback. Use it to set row attributes.
+        /// </summary>
+        /// <value>The row render callback.</value>
+        [Parameter]
+        public Action<PickListItemRenderEventArgs<TItem>> ItemRender { get; set; }
+
+        void OnSourceItemRender(ListBoxItemRenderEventArgs<object> args)
+        {
+            if (ItemRender != null)
+            {
+                var newArgs = new PickListItemRenderEventArgs<TItem>();
+                newArgs.Item = args.Item != null ? (TItem)args.Item : default(TItem);
+                ItemRender(newArgs);
+                newArgs.Attributes.ToList().ForEach(k => args.Attributes.Add(k.Key, k.Value));
+                args.Visible = newArgs.Visible;
+                args.Disabled = newArgs.Disabled;
+            }
+        }
+
+        void OnTargetItemRender(ListBoxItemRenderEventArgs<object> args)
+        {
+            if (ItemRender != null)
+            {
+                var newArgs = new PickListItemRenderEventArgs<TItem>();
+                newArgs.Item = args.Item != null ? (TItem)args.Item : default(TItem);
+                ItemRender(newArgs);
+                newArgs.Attributes.ToList().ForEach(k => args.Attributes.Add(k.Key, k.Value));
+                args.Visible = newArgs.Visible;
+                args.Disabled = newArgs.Disabled;
+            }
+        }
+
         private RenderFragment<dynamic> ListBoxTemplate => Template != null ? item => Template((TItem)item) : null;
 
         /// <summary>
diff --git a/RadzenBlazorDemos/Pages/PickListConfig.razor b/RadzenBlazorDemos/Pages/PickListConfig.razor
index 7c5971b94c6..1731a98668a 100644
--- a/RadzenBlazorDemos/Pages/PickListConfig.razor
+++ b/RadzenBlazorDemos/Pages/PickListConfig.razor
@@ -76,16 +76,17 @@
     <RadzenCard>
         <RadzenPickList AllowMoveAll="@allowMoveAll" AllowMoveAllSourceToTarget="@allowMoveSourceToTarget" AllowMoveAllTargetToSource="@allowMoveTargetToSource" @bind-Source="@Source" @bind-Target="@Target" Style="height:500px; width:100%;" Orientation="@orientation"
             TextProperty="@nameof(Customer.CompanyName)" AllowFiltering="@allowFilter" Multiple="@multiple" ShowHeader="@showHeader" Disabled="@disabled"
-            ButtonGap="@gap" ButtonJustifyContent="@justifyContent" ButtonStyle="@style" ButtonSize="@size" ButtonShade="@shade" ButtonVariant="@variant">
-            <SourceHeader>
-                Customers:
-            </SourceHeader>
-            <TargetHeader>
-                Selected Customers:
-            </TargetHeader>
-            <Template>
-                Company: @context.CompanyName
-            </Template>
+            ButtonGap="@gap" ButtonJustifyContent="@justifyContent" ButtonStyle="@style" ButtonSize="@size" ButtonShade="@shade" ButtonVariant="@variant"
+            ItemRender="OnItemRender">
+                <SourceHeader>
+                    Customers:
+                </SourceHeader>
+                <TargetHeader>
+                    Selected Customers:
+                </TargetHeader>
+                <Template>
+                    Company: @context.CompanyName
+                </Template>
         </RadzenPickList>
     </RadzenCard>
 </RadzenStack>
@@ -149,4 +150,9 @@
 
         Source = dbContext.Customers;
     }
+
+    void OnItemRender(PickListItemRenderEventArgs<Customer> args)
+    {
+        args.Disabled = args.Item.CompanyName.Contains("a");
+    }
 }
\ No newline at end of file