Add the generic variant for NControlViewRenderer

This will ease re-use for controls that inherit
from NControlView, by providing direct access
to the rendered class, in case it's different
than NControlView, without having to cast it manually.

Author: timotei

NControl/NControl.Droid/NControlViewRenderer.cs

@@ -38,11 +38,14 @@
 [assembly: ExportRenderer(typeof(NControlView), typeof(NControlViewRenderer))]
 namespace NControl.Droid
 {
+    public class NControlViewRenderer : NControlViewRenderer<NControlView> { }
+
     /// <summary>
     /// NControlView renderer.
     /// </summary>
     [Preserve(AllMembers = true)]
-    public class NControlViewRenderer : VisualElementRenderer<NControlView>
+    public class NControlViewRenderer<TNControlView> : VisualElementRenderer<TNControlView>
+        where TNControlView : NControlView
     {
         /// <summary>
         /// Used for registration with dependency service
@@ -56,7 +59,7 @@ public static void Init ()
         /// Raises the element changed event.
         /// </summary>
         /// <param name="e">E.</param>
-        protected override void OnElementChanged(ElementChangedEventArgs<NControlView> e)
+        protected override void OnElementChanged(ElementChangedEventArgs<TNControlView> e)
         {
             base.OnElementChanged(e);
 

NControl/NControl.iOS/NControlViewRenderer.cs

@@ -39,11 +39,14 @@
 [assembly: ExportRenderer(typeof(NControlView), typeof(NControlViewRenderer))]
 namespace NControl.iOS
 {
-	/// <summary>
-	/// NControlView renderer.
-	/// </summary>
+    public class NControlViewRenderer : NControlViewRenderer<NControlView> { }
+
+    /// <summary>
+    /// NControlView renderer.
+    /// </summary>
     [Preserve(AllMembers = true)]
-    public class NControlViewRenderer: VisualElementRenderer<NControlView>
+    public class NControlViewRenderer<TNControlView> : VisualElementRenderer<TNControlView>
+        where TNControlView : NControlView
 	{
         /// <summary>
         /// The gesture recognizer.
@@ -62,7 +65,7 @@ public class NControlViewRenderer: VisualElementRenderer<NControlView>
         /// Raises the element changed event.
         /// </summary>
         /// <param name="e">E.</param>
-        protected override void OnElementChanged(ElementChangedEventArgs<NControlView> e)
+        protected override void OnElementChanged(ElementChangedEventArgs<TNControlView> e)
         {
             base.OnElementChanged(e);