HamburgerMenu: Allow using own items together with the new HamburgerMenuItemStyleSelector

src/MahApps.Metro/Controls/HamburgerMenu/MenuItems/HamburgerMenuItem.cs

@@ -7,7 +7,7 @@ namespace MahApps.Metro.Controls
     /// <summary>
     /// The HamburgerMenuItem provides an implementation for HamburgerMenu entries.
     /// </summary>
-    public class HamburgerMenuItem : HamburgerMenuItemBase, ICommandSource
+    public class HamburgerMenuItem : HamburgerMenuItemBase, IHamburgerMenuItem, ICommandSource
     {
         /// <summary>
         /// Identifies the <see cref="Label"/> dependency property.

src/MahApps.Metro/Controls/HamburgerMenu/MenuItems/HamburgerMenuItemStyleSelector.cs

@@ -19,14 +19,14 @@ public override Style SelectStyle(object item, DependencyObject container)
                 var hamburgerMenu = listBox?.TryFindParent<HamburgerMenu>();
                 if (hamburgerMenu != null)
                 {
-                    if (item is HamburgerMenuSeparatorItem)
+                    if (item is IHamburgerMenuSeparatorItem)
                     {
                         if (hamburgerMenu.SeparatorItemContainerStyle != null)
                         {
                             return hamburgerMenu.SeparatorItemContainerStyle;
                         }
                     }
-                    else if (item is HamburgerMenuItem)
+                    else
                     {
                         var itemContainerStyle = this.IsItemOptions ? hamburgerMenu.OptionsItemContainerStyle : hamburgerMenu.ItemContainerStyle;
                         if (itemContainerStyle != null)

src/MahApps.Metro/Controls/HamburgerMenu/MenuItems/HamburgerMenuSeparatorItem.cs

@@ -5,7 +5,7 @@ namespace MahApps.Metro.Controls
     /// <summary>
     /// The HamburgerMenuSeparatorItem provides an separator based implementation for HamburgerMenu entries.
     /// </summary>
-    public class HamburgerMenuSeparatorItem : HamburgerMenuItemBase
+    public class HamburgerMenuSeparatorItem : HamburgerMenuItemBase, IHamburgerMenuSeparatorItem
     {
         protected override Freezable CreateInstanceCore()
         {

src/MahApps.Metro/Controls/HamburgerMenu/MenuItems/IHamburgerMenuItem.cs

@@ -0,0 +1,13 @@
+namespace MahApps.Metro.Controls
+{
+    public interface IHamburgerMenuItem
+    {
+        /// <summary>
+        /// Gets or sets a value indicating whether this item is enabled in the user interface (UI).
+        /// </summary>
+        /// <returns>
+        /// true if the item is enabled; otherwise, false. The default value is true.
+        /// </returns>
+        bool IsEnabled { get; set; }
+    }
+}

src/MahApps.Metro/Controls/HamburgerMenu/MenuItems/IHamburgerMenuSeparatorItem.cs

@@ -0,0 +1,6 @@
+namespace MahApps.Metro.Controls
+{
+    public interface IHamburgerMenuSeparatorItem
+    {
+    }
+}