优化更新代码，添加界面功能并整合

WPFluent/Controls/IconElement/SymbolIcon.cs

@@ -0,0 +1,83 @@
+using WPFluent.Extensions;
+
+
+// ReSharper disable once CheckNamespace
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Represents a text element containing an icon glyph.
+/// </summary>
+public class SymbolIcon : FontIcon
+{
+    /// <summary>
+    /// Identifies the <see cref="Symbol"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty SymbolProperty = DependencyProperty.Register(
+        nameof(Symbol),
+        typeof(SymbolRegular),
+        typeof(SymbolIcon),
+        new PropertyMetadata(SymbolRegular.Empty, static (o, _) => ((SymbolIcon)o).OnGlyphChanged()));
+
+    /// <summary>
+    /// Identifies the <see cref="Filled"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty FilledProperty = DependencyProperty.Register(
+        nameof(Filled),
+        typeof(bool),
+        typeof(SymbolIcon),
+        new PropertyMetadata(false, OnFilledChanged));
+
+    public SymbolIcon()
+    {
+    }
+
+    public SymbolIcon(SymbolRegular symbol, double fontSize = 14, bool filled = false)
+    {
+        Symbol = symbol;
+        Filled = filled;
+        FontSize = fontSize;
+    }
+
+    private static void OnFilledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        var self = (SymbolIcon)d;
+        self.SetFontReference();
+        self.OnGlyphChanged();
+    }
+
+    private void OnGlyphChanged()
+    {
+        if (Filled)
+        {
+            SetCurrentValue(GlyphProperty, Symbol.Swap().GetString());
+        }
+        else
+        {
+            SetCurrentValue(GlyphProperty, Symbol.GetString());
+        }
+    }
+
+    private void SetFontReference()
+    { SetResourceReference(FontFamilyProperty, Filled ? "FluentSystemIconsFilled" : "FluentSystemIcons"); }
+
+    protected override void OnInitialized(EventArgs e)
+    {
+        base.OnInitialized(e);
+
+        SetFontReference();
+    }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether or not we should use the <see cref="SymbolFilled"/>.
+    /// </summary>
+    public bool Filled { get => (bool)GetValue(FilledProperty); set => SetValue(FilledProperty, value); }
+
+    /// <summary>
+    /// Gets or sets displayed <see cref="SymbolRegular"/>.
+    /// </summary>
+    public SymbolRegular Symbol
+    {
+        get => (SymbolRegular)GetValue(SymbolProperty);
+        set => SetValue(SymbolProperty, value);
+    }
+}