[Android, iOS] added re-measure of TimePicker after change value (#4999)

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue4961.cs

@@ -0,0 +1,33 @@
+using System;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 4961, "TimePicker does not remeasure its size when picking a new time that is wider than the previously selected value",
+		PlatformAffected.Android | PlatformAffected.iOS)]
+	public class Issue4961 : TestContentPage
+	{
+		protected override void Init()
+		{
+			Content = new StackLayout
+			{
+				Children =
+				{
+					new Label
+					{
+						Text = "When changing the Time of the TimePicker the control should be remeasured and its size may change. " +
+							"Set the time to 12:50 AM and check that the text does not get out of the screen."
+					},
+					new TimePicker
+					{
+						Time = TimeSpan.FromHours(1),
+						HorizontalOptions = LayoutOptions.EndAndExpand,
+						VerticalOptions = LayoutOptions.Start
+					}
+				}
+			};
+		}
+	}
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems

@@ -19,6 +19,7 @@
       <DependentUpon>Issue1588.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Issue4961.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue4629.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue4384.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue4782.cs" />

Xamarin.Forms.Platform.Android/Renderers/TimePickerRenderer.cs

@@ -41,7 +41,6 @@ namespace Xamarin.Forms.Platform.Android
 		void TimePickerDialog.IOnTimeSetListener.OnTimeSet(ATimePicker view, int hourOfDay, int minute)
 		{
 			ElementController.SetValueFromRenderer(TimePicker.TimeProperty, new TimeSpan(hourOfDay, minute, 0));
-
 			ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
 
 			if (Forms.IsLollipopOrNewer)
@@ -134,6 +133,7 @@ namespace Xamarin.Forms.Platform.Android
 		{
 			var timeFormat = Is24HourView ? "HH:mm" : Element.Format;
 			EditText.Text = DateTime.Today.Add(time).ToString(timeFormat);
+			Element.InvalidateMeasureNonVirtual(Internals.InvalidationTrigger.MeasureChanged);
 		}
 
 		void UpdateFont()

Xamarin.Forms.Platform.iOS/Renderers/TimePickerRenderer.cs

@@ -159,6 +159,7 @@ namespace Xamarin.Forms.Platform.iOS
 		{
 			_picker.Date = new DateTime(1, 1, 1).Add(Element.Time).ToNSDate();
 			Control.Text = DateTime.Today.Add(Element.Time).ToString(Element.Format);
+			Element.InvalidateMeasureNonVirtual(Internals.InvalidationTrigger.MeasureChanged);
 		}
 	}
 }