🆕 feat(Treeview): open parent nodes of filtered node after filtering (#…

…514) * 🆕 feat(Treeview): open parent nodes of filtered node after filtering * Update BComponentBase.cs
masastack · Nov 27, 2023 · 148e381 · 148e381
1 parent 3bffd16
commit 148e381
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Showing 2 changed files with 28 additions and 7 deletions.
diff --git a/src/Component/BlazorComponent/Abstracts/Components/BComponentBase.cs b/src/Component/BlazorComponent/Abstracts/Components/BComponentBase.cs
@@ -126,12 +126,12 @@ protected async Task PreventRenderingUtil(params Func<Task>[] funcs)
         }
 
         /// <summary>
-        /// Run a task in microseconds.
+        /// Debounce a task in microseconds. 
         /// </summary>
         /// <param name="task">A task to run.</param>
         /// <param name="millisecondsDelay">Delay in milliseconds.</param>
-        /// <param name="cancellationToken">A cancellation token to cancel the task.</param>
-        protected static async Task RunTaskInMicrosecondsAsync(Func<Task> task, int millisecondsDelay, CancellationToken cancellationToken = default)
+        /// <param name="cancellationToken">A cancellation token to cancel the last task.</param>
+        protected static async Task RunTaskInMicrosecondsAsync(Func<Task> task, int millisecondsDelay, CancellationToken cancellationToken)
         {
             try
             {
@@ -145,12 +145,12 @@ protected static async Task RunTaskInMicrosecondsAsync(Func<Task> task, int mill
         }
 
         /// <summary>
-        /// Run a task in microseconds.
+        /// Debounce a task in microseconds.
         /// </summary>
         /// <param name="task">A task to run.</param>
         /// <param name="millisecondsDelay">Delay in milliseconds.</param>
-        /// <param name="cancellationToken">A cancellation token to cancel the task.</param>
-        protected static async Task RunTaskInMicrosecondsAsync(Action task, int millisecondsDelay, CancellationToken cancellationToken = default)
+        /// <param name="cancellationToken">A cancellation token to cancel the last task.</param>
+        protected static async Task RunTaskInMicrosecondsAsync(Action task, int millisecondsDelay, CancellationToken cancellationToken)
         {
             try
             {

diff --git a/src/Component/BlazorComponent/Components/Treeview/BTreeview.razor.cs b/src/Component/BlazorComponent/Components/Treeview/BTreeview.razor.cs
@@ -7,6 +7,8 @@ public partial class BTreeview<TItem, TKey> : ITreeview<TItem, TKey> where TKey
         private List<TKey> _oldValue = new();
         private List<TKey> _oldActive = new();
         private List<TKey> _oldOpen = new();
+        private string? _prevSearch;
+        private CancellationTokenSource? _searchUpdateCts;
 
         [Parameter, EditorRequired]
         public List<TItem> Items { get; set; } = null!;
@@ -395,6 +397,11 @@ private bool FilterTreeItems(TItem item, ref List<TKey> excluded)
         {
             if (FilterTreeItem(item, Search, ItemText))
             {
+                if (Nodes.TryGetValue(ItemKey(item), out var nodeState) && nodeState.Parent != null)
+                {
+                    UpdateOpen(nodeState.Parent, true);
+                }
+
                 return true;
             }
 
@@ -408,6 +415,11 @@ private bool FilterTreeItems(TItem item, ref List<TKey> excluded)
                 {
                     if (FilterTreeItems(child, ref excluded))
                     {
+                        if (Nodes.TryGetValue(ItemKey(child), out var nodeState) && nodeState.Parent != null)
+                        {
+                            UpdateOpen(nodeState.Parent, true);
+                        }
+
                         match = true;
                     }
                 }
@@ -466,7 +478,7 @@ private string CombineItemKeys(IList<TItem> list)
 
             return keys;
         }
-
+        
         protected override async Task OnParametersSetAsync()
         {
             await base.OnParametersSetAsync();
@@ -509,6 +521,15 @@ protected override async Task OnParametersSetAsync()
                 await HandleUpdate(_oldOpen, Open, UpdateOpen, EmitOpenAsync);
                 _oldOpen = open;
             }
+
+            if (_prevSearch != Search)
+            {
+                _prevSearch = Search;
+
+                _searchUpdateCts?.Cancel();
+                _searchUpdateCts = new();
+                await RunTaskInMicrosecondsAsync(EmitOpenAsync, 300, _searchUpdateCts.Token);
+            }
         }
 
         protected override void OnAfterRender(bool firstRender)