feat: fix content preparation logic.

demo/Ursa.Demo/Pages/BreadcrumbDemo.axaml

@@ -1,17 +1,37 @@
-<UserControl xmlns="https://github.com/avaloniaui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:u="https://irihi.tech/ursa"
-             mc:Ignorable="d" d:DesignWidth="800"
-             d:DesignHeight="450"
-             x:Class="Ursa.Demo.Pages.BreadcrumbDemo">
+<UserControl
+    x:Class="Ursa.Demo.Pages.BreadcrumbDemo"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:u="https://irihi.tech/ursa"
+    xmlns:vm="using:Ursa.Demo.ViewModels"
+    xmlns:converters="clr-namespace:Ursa.Demo.Converters"
+    d:DesignHeight="450"
+    d:DesignWidth="800"
+    x:CompileBindings="True"
+    x:DataType="vm:BreadcrumbDemoViewModel"
+    mc:Ignorable="d">
+    <UserControl.Resources>
+        <converters:IconNameToPathConverter x:Key="IconConverter" />
+    </UserControl.Resources>
     <StackPanel>
-        <u:Breadcrumb >
-            <TextBlock Text="Hello"></TextBlock>
-            <u:BreadcrumbItem Icon="?" Separator="♥"></u:BreadcrumbItem>
-            <TextBlock Text="Avalonia"></TextBlock>
-            <TextBlock Text="Ursa"></TextBlock>
+        
+        <u:Breadcrumb>
+            <TextBlock Text="Hello" />
+            <u:BreadcrumbItem Icon="?" Separator="♥" />
+            <TextBlock Text="Avalonia" />
+            <TextBlock Text="Ursa" />
+        </u:Breadcrumb>
+        <u:Breadcrumb
+            DisplayMemberBinding="{Binding Section}"
+            IconBinding="{Binding Icon}"
+            ItemsSource="{Binding Items1}">
+            <u:Breadcrumb.IconTemplate>
+                <DataTemplate DataType="x:String">
+                    <PathIcon Width="12" Height="12" Data="{Binding Path=., Converter={StaticResource IconConverter}}"></PathIcon>
+                </DataTemplate>
+            </u:Breadcrumb.IconTemplate>
         </u:Breadcrumb>
     </StackPanel>
 </UserControl>

demo/Ursa.Demo/ViewModels/BreadcrumbDemoViewModel.cs

@@ -1,8 +1,26 @@
+using System.Collections.ObjectModel;
 using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace Ursa.Demo.ViewModels;
 
 public class BreadcrumbDemoViewModel: ObservableObject
 {
-    
+    public ObservableCollection<BreadcrumbDemoItem> Items1 { get; set; }
+
+    public BreadcrumbDemoViewModel()
+    {
+        Items1 = new ObservableCollection<BreadcrumbDemoItem>()
+        {
+            new BreadcrumbDemoItem() { Section = "Home", Icon = "Home" },
+            new BreadcrumbDemoItem() { Section = "Page 1", Icon = "Page" },
+            new BreadcrumbDemoItem() { Section = "Page 2", Icon = "Page" },
+            new BreadcrumbDemoItem() { Section = "Page 3", Icon = "Page" },
+        };
+    }
+}
+
+public class BreadcrumbDemoItem: ObservableObject
+{
+    public string Section { get; set; }
+    public string Icon { get; set; }
 }