Initial import

1 files changed, 152 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.Android/Renderers/NavigationMenuRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/NavigationMenuRenderer.cs
new file mode 100644
index 00000000..9678b9ca
--- /dev/null
+++ b/Xamarin.Forms.Platform.Android/Renderers/NavigationMenuRenderer.cs
@@ -0,0 +1,152 @@
+using System;
+using System.ComponentModel;
+using System.Linq;
+using Android.Content;
+using Android.Graphics;
+using Android.Views;
+using Android.Widget;
+using AView = Android.Views.View;
+
+namespace Xamarin.Forms.Platform.Android
+{
+	public sealed class NavigationMenuRenderer : ViewRenderer
+	{
+		public NavigationMenuRenderer()
+		{
+			AutoPackage = false;
+		}
+
+		GridView GridView
+		{
+			get { return Control as GridView; }
+		}
+
+		NavigationMenu NavigationMenu
+		{
+			get { return Element as NavigationMenu; }
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<View> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.OldElement == null)
+			{
+				var grid = new GridView(Context);
+				grid.SetVerticalSpacing(20);
+
+				SetNativeControl(grid);
+			}
+
+			UpdateTargets();
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			switch (e.PropertyName)
+			{
+				case "Targets":
+					UpdateTargets();
+					break;
+			}
+		}
+
+		protected override void OnSizeChanged(int w, int h, int oldw, int oldh)
+		{
+			GridView.NumColumns = w > h ? 3 : 2;
+			base.OnSizeChanged(w, h, oldw, oldh);
+		}
+
+		void UpdateTargets()
+		{
+			GridView.Adapter = new MenuAdapter(NavigationMenu);
+		}
+
+		class MenuElementView : LinearLayout
+		{
+			readonly ImageButton _image;
+			readonly TextView _label;
+			string _icon;
+
+			public MenuElementView(Context context) : base(context)
+			{
+				Orientation = Orientation.Vertical;
+				_image = new ImageButton(context);
+				_image.SetScaleType(ImageView.ScaleType.FitCenter);
+				_image.Click += (object sender, EventArgs e) =>
+				{
+					if (Selected != null)
+						Selected();
+				};
+				AddView(_image, new LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent) { Gravity = GravityFlags.Center });
+
+				_label = new TextView(context) { TextAlignment = global::Android.Views.TextAlignment.Center, Gravity = GravityFlags.Center };
+				AddView(_label, new LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.WrapContent));
+			}
+
+			public string Icon
+			{
+				get { return _icon; }
+				set
+				{
+					_icon = value;
+					Bitmap bitmap = Context.Resources.GetBitmap(_icon);
+					_image.SetImageBitmap(bitmap);
+				}
+			}
+
+			public string Name
+			{
+				get { return _label.Text; }
+				set { _label.Text = value; }
+			}
+
+			public Action Selected { get; set; }
+		}
+
+		class MenuAdapter : BaseAdapter<Page>
+		{
+			readonly NavigationMenu _menu;
+
+			public MenuAdapter(NavigationMenu menu)
+			{
+				_menu = menu;
+			}
+
+			#region implemented abstract members of BaseAdapter
+
+			public override Page this[int index]
+			{
+				get { return _menu.Targets.ElementAtOrDefault(index); }
+			}
+
+			#endregion
+
+			public override AView GetView(int position, AView convertView, ViewGroup parent)
+			{
+				MenuElementView menuItem = convertView as MenuElementView ?? new MenuElementView(parent.Context);
+				Page item = this[position];
+				menuItem.Icon = item.Icon;
+				menuItem.Name = item.Title;
+				menuItem.Selected = () => _menu.SendTargetSelected(item);
+				return menuItem;
+			}
+
+			#region implemented abstract members of BaseAdapter
+
+			public override long GetItemId(int position)
+			{
+				return 0;
+			}
+
+			public override int Count
+			{
+				get { return _menu.Targets.Count(); }
+			}
+
+			#endregion
+		}
+	}
+}
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