Initial import

1 files changed, 117 insertions, 0 deletions

diff --git a/Xamarin.Forms.Core/MenuItem.cs b/Xamarin.Forms.Core/MenuItem.cs
new file mode 100644
index 00000000..3e830445
--- /dev/null
+++ b/Xamarin.Forms.Core/MenuItem.cs
@@ -0,0 +1,117 @@
+using System;
+using System.Windows.Input;
+
+namespace Xamarin.Forms
+{
+	public class MenuItem : BaseMenuItem
+	{
+		public static readonly BindableProperty TextProperty = BindableProperty.Create("Text", typeof(string), typeof(MenuItem), null);
+
+		public static readonly BindableProperty CommandProperty = BindableProperty.Create("Command", typeof(ICommand), typeof(MenuItem), null,
+			propertyChanging: (bo, o, n) => ((MenuItem)bo).OnCommandChanging(), propertyChanged: (bo, o, n) => ((MenuItem)bo).OnCommandChanged());
+
+		public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create("CommandParameter", typeof(object), typeof(MenuItem), null,
+			propertyChanged: (bo, o, n) => ((MenuItem)bo).OnCommandParameterChanged());
+
+		public static readonly BindableProperty IsDestructiveProperty = BindableProperty.Create("IsDestructive", typeof(bool), typeof(MenuItem), false);
+
+		public static readonly BindableProperty IconProperty = BindableProperty.Create("Icon", typeof(FileImageSource), typeof(MenuItem), default(FileImageSource));
+
+		internal static readonly BindableProperty IsEnabledProperty = BindableProperty.Create("IsEnabled", typeof(bool), typeof(ToolbarItem), true);
+
+		public ICommand Command
+		{
+			get { return (ICommand)GetValue(CommandProperty); }
+			set { SetValue(CommandProperty, value); }
+		}
+
+		public object CommandParameter
+		{
+			get { return GetValue(CommandParameterProperty); }
+			set { SetValue(CommandParameterProperty, value); }
+		}
+
+		public FileImageSource Icon
+		{
+			get { return (FileImageSource)GetValue(IconProperty); }
+			set { SetValue(IconProperty, value); }
+		}
+
+		public bool IsDestructive
+		{
+			get { return (bool)GetValue(IsDestructiveProperty); }
+			set { SetValue(IsDestructiveProperty, value); }
+		}
+
+		public string Text
+		{
+			get { return (string)GetValue(TextProperty); }
+			set { SetValue(TextProperty, value); }
+		}
+
+		internal bool IsEnabled
+		{
+			get { return (bool)GetValue(IsEnabledProperty); }
+			set { SetValue(IsEnabledProperty, value); }
+		}
+
+		bool IsEnabledCore
+		{
+			set { SetValueCore(IsEnabledProperty, value); }
+		}
+
+		public event EventHandler Clicked;
+
+		protected virtual void OnClicked()
+		{
+			EventHandler handler = Clicked;
+			if (handler != null)
+				handler(this, EventArgs.Empty);
+		}
+
+		internal void Activate()
+		{
+			if (Command != null)
+			{
+				if (IsEnabled)
+					Command.Execute(CommandParameter);
+			}
+
+			OnClicked();
+		}
+
+		void OnCommandCanExecuteChanged(object sender, EventArgs eventArgs)
+		{
+			IsEnabledCore = Command.CanExecute(CommandParameter);
+		}
+
+		void OnCommandChanged()
+		{
+			if (Command == null)
+			{
+				IsEnabledCore = true;
+				return;
+			}
+
+			IsEnabledCore = Command.CanExecute(CommandParameter);
+
+			Command.CanExecuteChanged += OnCommandCanExecuteChanged;
+		}
+
+		void OnCommandChanging()
+		{
+			if (Command == null)
+				return;
+
+			Command.CanExecuteChanged -= OnCommandCanExecuteChanged;
+		}
+
+		void OnCommandParameterChanged()
+		{
+			if (Command == null)
+				return;
+
+			IsEnabledCore = Command.CanExecute(CommandParameter);
+		}
+	}
+}
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