feat(TreeView): add OverscanCount parameter (#5673)

* test: 更新单元测试

* feat(TreeView): 增加 OverscanCount 支持

* doc: 更新默认值

* chore: bump version 9.4.10

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.5.0-beta09</Version>
+    <Version>9.4.10</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/TreeView/TreeView.razor

@@ -47,7 +47,7 @@ else
         @if (IsVirtualize)
         {
             <div class="tree-root scroll is-virtual" tabindex="0">
-                <Virtualize ItemSize="RowHeight" OverscanCount="10" Items="@Rows">
+                <Virtualize ItemSize="RowHeight" OverscanCount="OverscanCount" Items="@Rows">
                     @RenderRow(context)
                 </Virtualize>
             </div>

src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs

@@ -218,11 +218,18 @@ public partial class TreeView<TItem> : IModelEqualityComparer<TItem>
     public bool IsVirtualize { get; set; }
 
     /// <summary>
-    /// Gets or sets the row height for virtual scrolling. Default is 38.
+    /// Gets or sets the row height for virtual scrolling. Default is 29f.
     /// </summary>
-    /// <remarks>Effective when <see cref="ScrollMode"/> is set to Virtual.</remarks>
+    /// <remarks>Effective when <see cref="IsVirtualize"/> is set to true.</remarks>
     [Parameter]
-    public float RowHeight { get; set; } = 38f;
+    public float RowHeight { get; set; } = 29f;
+
+    /// <summary>
+    /// Gets or sets the overscan count for virtual scrolling. Default is 10.
+    /// </summary>
+    /// <remarks>Effective when <see cref="IsVirtualize"/> is set to true.</remarks>
+    [Parameter]
+    public int OverscanCount { get; set; } = 10;
 
     /// <summary>
     /// Gets or sets the toolbar content template. Default is null.

test/UnitTest/Components/TimerTest.cs

@@ -132,13 +132,12 @@ public async Task OnCancel_Ok()
         var downs = cut.FindAll(".time-spinner-arrow.fa-angle-down");
         await cut.InvokeAsync(() => downs[0].Click());
         await cut.InvokeAsync(() => cut.Find(".time-panel-btn.confirm").Click());
-        await Task.Delay(1000);
-        var buttons = cut.FindAll(".timer-buttons button");
+
         // pause
+        var buttons = cut.FindAll(".timer-buttons button");
         Assert.True(buttons[1].ClassList.Contains("btn-warning"));
         Assert.Equal("暂停", buttons[1].GetInnerText());
         await cut.InvokeAsync(() => buttons[1].Click());
-        await Task.Delay(500);
 
         // resume
         buttons = cut.FindAll(".timer-buttons button");
@@ -156,6 +155,5 @@ public async Task OnCancel_Ok()
         downs = cut.FindAll(".time-spinner-arrow.fa-angle-down");
         await cut.InvokeAsync(() => downs[0].Click());
         await cut.InvokeAsync(() => cut.Find(".time-panel-btn.confirm").Click());
-        await Task.Delay(1000);
     }
 }