1 files changed, 97 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/DatePickerRenderer.cs b/Xamarin.Forms.Platform.WinRT/DatePickerRenderer.cs
new file mode 100644
index 00000000..23f134f2
--- /dev/null
+++ b/Xamarin.Forms.Platform.WinRT/DatePickerRenderer.cs
@@ -0,0 +1,97 @@
+using System;
+using System.ComponentModel;
+using Windows.UI.Xaml.Controls;
+
+#if WINDOWS_UWP
+
+namespace Xamarin.Forms.Platform.UWP
+#else
+
+namespace Xamarin.Forms.Platform.WinRT
+#endif
+{
+	public class DatePickerRenderer : ViewRenderer<DatePicker, FormsDatePicker>, IWrapperAware
+	{
+		public void NotifyWrapped()
+		{
+			if (Control != null)
+			{
+				Control.ForceInvalidate += PickerOnForceInvalidate;
+			}
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && Control != null)
+			{
+				Control.ForceInvalidate -= PickerOnForceInvalidate;
+				Control.DateChanged -= OnControlDateChanged;
+			}
+
+			base.Dispose(disposing);
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
+		{
+			if (e.NewElement != null)
+			{
+				if (Control == null)
+				{
+					var picker = new FormsDatePicker();
+					picker.DateChanged += OnControlDateChanged;
+					SetNativeControl(picker);
+				}
+
+				UpdateMinimumDate();
+				UpdateMaximumDate();
+				UpdateDate(e.NewElement.Date);
+			}
+
+			base.OnElementChanged(e);
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == DatePicker.DateProperty.PropertyName)
+				UpdateDate(Element.Date);
+			else if (e.PropertyName == DatePicker.MaximumDateProperty.PropertyName)
+				UpdateMaximumDate();
+			else if (e.PropertyName == DatePicker.MinimumDateProperty.PropertyName)
+				UpdateMinimumDate();
+		}
+
+		void OnControlDateChanged(object sender, DatePickerValueChangedEventArgs e)
+		{
+			Element.Date = e.NewDate.Date;
+			DateTime currentDate = Element.Date;
+			if (currentDate != e.NewDate.Date) // Match coerced value
+				UpdateDate(currentDate);
+
+			Element.InvalidateMeasure(InvalidationTrigger.SizeRequestChanged);
+		}
+
+		void PickerOnForceInvalidate(object sender, EventArgs eventArgs)
+		{
+			Element?.InvalidateMeasure(InvalidationTrigger.SizeRequestChanged);
+		}
+
+		void UpdateDate(DateTime date)
+		{
+			Control.Date = date;
+		}
+
+		void UpdateMaximumDate()
+		{
+			DateTime maxdate = Element.MaximumDate;
+			Control.MaxYear = new DateTimeOffset(maxdate.Date);
+		}
+
+		void UpdateMinimumDate()
+		{
+			DateTime mindate = Element.MinimumDate;
+			Control.MinYear = new DateTimeOffset(mindate);
+		}
+	}
+}
+\ No newline at end of file