功能更新

Melskin/Controls/Breadcrumb.xaml.cs

@@ -0,0 +1,244 @@
+using System.Collections.Specialized;
+
+namespace Melskin.Controls;
+
+/// <summary>
+/// 面包屑
+/// </summary>
+[StyleTypedProperty(Property = "ItemContainerStyle", StyleTargetType = typeof(BreadcrumbItem))]
+public class Breadcrumb : ItemsControl
+{
+    #region 事件
+
+    /// <summary>
+    /// 导航
+    /// </summary>
+    public static readonly RoutedEvent NavigateEvent = EventManager.RegisterRoutedEvent(
+        "Navigate",
+        RoutingStrategy.Direct,
+        typeof(RoutedPropertyChangedEventHandler<string>),
+        typeof(Breadcrumb));
+
+    /// <summary>
+    /// 导航
+    /// </summary>
+    public event RoutedPropertyChangedEventHandler<string> Navigate
+    {
+        add => AddHandler(NavigateEvent, value);
+        remove => RemoveHandler(NavigateEvent, value);
+    }
+    #endregion
+
+    #region 属性
+
+    /// <summary>
+    /// 链接
+    /// </summary>
+    public static readonly DependencyProperty HrefProperty =
+        DependencyProperty.Register(
+        nameof(Href),
+        typeof(string),
+        typeof(Breadcrumb),
+        new FrameworkPropertyMetadata(string.Empty));
+
+    /// <summary>
+    /// 链接
+    /// </summary>
+    public string Href { get => (string)GetValue(HrefProperty);
+        set => SetValue(HrefProperty, value);
+    }
+
+    /// <summary>
+    /// 分隔符
+    /// </summary>
+    public static readonly DependencyProperty SeparatorProperty =
+        DependencyProperty.Register(nameof(Separator), typeof(string), typeof(Breadcrumb), new FrameworkPropertyMetadata("/"));
+
+    /// <summary>
+    /// 分隔符
+    /// </summary>
+    public string Separator
+    {
+        get => (string)GetValue(SeparatorProperty);
+        set => SetValue(SeparatorProperty, value);
+    }
+
+    /// <summary>
+    /// 分隔符颜色
+    /// </summary>
+    public static readonly DependencyProperty SeparatorBrushProperty =
+        DependencyProperty.Register(
+        nameof(SeparatorBrush),
+        typeof(Brush),
+        typeof(Breadcrumb),
+        new FrameworkPropertyMetadata(null));
+
+    /// <summary>
+    /// 分隔符颜色
+    /// </summary>
+    public Brush SeparatorBrush
+    {
+        get => (Brush)GetValue(SeparatorBrushProperty);
+        set => SetValue(SeparatorBrushProperty, value);
+    }
+    #endregion
+
+    static Breadcrumb()
+    { DefaultStyleKeyProperty.OverrideMetadata(typeof(Breadcrumb), new FrameworkPropertyMetadata(typeof(Breadcrumb))); }
+
+    /// <inheritdoc/>
+    protected override bool IsItemItsOwnContainerOverride(object item) { return item is BreadcrumbItem; }
+
+    /// <inheritdoc/>
+    protected override DependencyObject GetContainerForItemOverride() { return new BreadcrumbItem(); }
+
+    /// <inheritdoc/>
+    public override void OnApplyTemplate()
+    {
+        base.OnApplyTemplate();
+
+        Loaded += Breadcrumb_Loaded;
+    }
+
+    private void Breadcrumb_Loaded(object sender, RoutedEventArgs e)
+    {
+        Loaded -= Breadcrumb_Loaded;
+
+        for(var i = 0; i < Items.Count; i++)
+        {
+            if(ItemContainerGenerator.ContainerFromIndex(i) is BreadcrumbItem breadcrumbItem)
+            {
+                breadcrumbItem.Navigate += BreadcrumbItem_Navigate;
+            }
+        }
+    }
+
+    /// <inheritdoc/>
+    protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
+    {
+        base.OnItemsChanged(e);
+
+        if (e.OldItems is null) return;
+        if (e.NewItems != null)
+        {
+            foreach (var item in e.NewItems.OfType<BreadcrumbItem>())
+            {
+                item.Navigate += BreadcrumbItem_Navigate;
+            }
+        }
+
+        foreach(var item in e.OldItems.OfType<BreadcrumbItem>())
+        {
+            item.Navigate -= BreadcrumbItem_Navigate;
+        }
+    }
+
+    private void BreadcrumbItem_Navigate(object sender, RoutedPropertyChangedEventArgs<string> e)
+    {
+        RaiseEvent(new RoutedPropertyChangedEventArgs<string>(Href, e.NewValue) { RoutedEvent = NavigateEvent });
+
+        Href = e.NewValue;
+    }
+}
+
+/// <summary>
+/// 面包屑子项
+/// </summary>
+public class BreadcrumbItem : Button
+{
+    static BreadcrumbItem()
+    {
+        DefaultStyleKeyProperty.OverrideMetadata(
+            typeof(BreadcrumbItem),
+            new FrameworkPropertyMetadata(typeof(BreadcrumbItem)));
+    }
+
+    #region 事件
+
+    /// <summary>
+    /// 导航
+    /// </summary>
+    public static readonly RoutedEvent NavigateEvent = EventManager.RegisterRoutedEvent(
+        "Navigate",
+        RoutingStrategy.Direct,
+        typeof(RoutedPropertyChangedEventHandler<string>),
+        typeof(BreadcrumbItem));
+
+    /// <summary>
+    /// 导航
+    /// </summary>
+    public event RoutedPropertyChangedEventHandler<string> Navigate
+    {
+        add => AddHandler(NavigateEvent, value);
+        remove => RemoveHandler(NavigateEvent, value);
+    }
+    #endregion
+
+    #region 属性
+
+    /// <summary>
+    /// 链接
+    /// </summary>
+    public static readonly DependencyProperty HrefProperty =
+        DependencyProperty.Register(
+        nameof(Href),
+        typeof(string),
+        typeof(BreadcrumbItem),
+        new FrameworkPropertyMetadata(string.Empty));
+
+    /// <summary>
+    /// 链接
+    /// </summary>
+    public string Href
+    {
+        get => (string)GetValue(HrefProperty);
+        set => SetValue(HrefProperty, value);
+    }
+
+    /// <summary>
+    /// 分隔符
+    /// </summary>
+    public static readonly DependencyProperty SeparatorProperty =
+        DependencyProperty.Register(
+        nameof(Separator),
+        typeof(string),
+        typeof(BreadcrumbItem),
+        new FrameworkPropertyMetadata("/"));
+
+    /// <summary>
+    /// 分隔符
+    /// </summary>
+    public string Separator
+    {
+        get => (string)GetValue(SeparatorProperty);
+        set => SetValue(SeparatorProperty, value);
+    }
+
+    /// <summary>
+    /// 分隔符颜色
+    /// </summary>
+    public static readonly DependencyProperty SeparatorBrushProperty =
+        DependencyProperty.Register(
+        nameof(SeparatorBrush),
+        typeof(Brush),
+        typeof(BreadcrumbItem),
+        new FrameworkPropertyMetadata(null));
+
+    /// <summary>
+    /// 分隔符颜色
+    /// </summary>
+    public Brush SeparatorBrush
+    {
+        get => (Brush)GetValue(SeparatorBrushProperty);
+        set => SetValue(SeparatorBrushProperty, value);
+    }
+    #endregion
+
+    /// <inheritdoc/>
+    protected override void OnClick()
+    {
+        base.OnClick();
+
+        RaiseEvent(new RoutedPropertyChangedEventArgs<string?>(null, Href) { RoutedEvent = NavigateEvent });
+    }
+}