82 lines
2.6 KiB
C#
82 lines
2.6 KiB
C#
using System.Diagnostics;
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using System.Windows.Controls.Primitives;
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using System.Windows.Input;
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namespace Melskin.Controls;
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/// <summary>
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/// A hyperlink button.
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/// </summary>
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public class Hyperlink : ButtonBase
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{
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#region Properties
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/// <summary>
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/// 已经浏览过的依赖属性。
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/// </summary>
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public bool IsVisited
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{
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get { return (bool)GetValue(IsVisitedProperty); }
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// 外部无法直接赋值，只能读取
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private set { SetValue(IsVisitedPropertyKey, value); }
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}
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/// <summary>
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/// 定义私有的 Key：这是“写入权限”的钥匙，只有在这个类内部才能拿到
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/// </summary>
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public static readonly DependencyProperty IsVisitedProperty;
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/// <summary>
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/// 表示已经浏览过的依赖属性。
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/// </summary>
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public static readonly DependencyPropertyKey IsVisitedPropertyKey;
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/// <summary>
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/// 外部调用此方法来将超链接标记为已访问。
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/// </summary>
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public void MarkAsVisited()
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{
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SetValue(IsVisitedPropertyKey, true);
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}
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/// <summary>
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/// 表示超链接地址的依赖属性。
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/// </summary>
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public static readonly DependencyProperty NavigateUriProperty =
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DependencyProperty.Register(nameof(NavigateUri), typeof(string), typeof(Hyperlink), new PropertyMetadata(string.Empty));
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/// <summary>
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/// Gets or sets the uri of hyperlinks.
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/// </summary>
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public string NavigateUri { get => (string)GetValue(NavigateUriProperty);
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set => SetValue(NavigateUriProperty, value);
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}
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#endregion
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#region Constructors
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static Hyperlink()
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{
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IsVisitedPropertyKey = DependencyProperty.RegisterReadOnly(nameof(IsVisited), typeof(bool), typeof(Hyperlink), new PropertyMetadata(false));
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IsVisitedProperty = IsVisitedPropertyKey.DependencyProperty;
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DefaultStyleKeyProperty.OverrideMetadata(typeof(Hyperlink), new FrameworkPropertyMetadata(typeof(Hyperlink)));
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}
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#endregion
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/// <summary>
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/// 点击后的事件
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/// </summary>
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/// <param name="e"></param>
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protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
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{
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base.OnMouseLeftButtonDown(e);
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if (string.IsNullOrEmpty(NavigateUri)) return;
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try
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{
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// 1. 打开网页
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Process.Start(new ProcessStartInfo(NavigateUri) { UseShellExecute = true });
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// 2. 改变自身状态（这就是你作为控件的“记忆”）
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SetValue(IsVisitedPropertyKey, true);
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}
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catch
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{
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// 忽略无效链接异常
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}
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}
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}
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