feat: Add calendar selection delegate for iOS and MacCatalyst platforms

This commit adds a new `CalendarSelectionSingleDateDelegate` class that implements the `IUICalendarSelectionSingleDateDelegate` interface. The delegate is responsible for handling date selection events in the calendar view. When a date is selected, it updates the selected date in the calendar view and triggers the `OnSelectedDateChanged` event.

The `CalendarHandler` class has been updated to use this delegate for both iOS and MacCatalyst platforms. The `ConnectHandler` method now sets up the calendar selection behavior using an instance of `UICalendarSelectionSingleDate`. Additionally, there are new methods (`MapSingleDateSelection`, `SetDateRange`) that handle mapping properties related to date selection and range.

No changes were made to the Tizen platform implementation.

Note: This commit does not include specific file names or mention any specific code files.

MauiBells/Platforms/MacCatalyst/CalendarHandler.cs

@@ -1,31 +1,88 @@
 namespace MauiBells.Calendar;
 
+using Foundation;
 using Microsoft.Maui.Handlers;
+using Microsoft.Maui.Platform;
+using ObjCRuntime;
 using UIKit;
 
+public sealed class CalendarSelectionSingleDateDelegate(ICalendarView calendarView)
+	: IUICalendarSelectionSingleDateDelegate
+{
+	public void DidSelectDate(UICalendarSelectionSingleDate calendarSelection, NSDateComponents? date)
+	{
+		calendarView.SelectedDate = date?.Date.ToDateTime();
+		calendarView.OnSelectedDateChanged(date?.Date.ToDateTime());
+	}
+
+	public void Dispose()
+	{
+	}
+
+	public NativeHandle Handle { get; }
+}
+
 public partial class CalendarHandler : ViewHandler<ICalendarView, UICalendarView>
 {
+	private UICalendarSelection? calendarSelection;
+
 	protected override UICalendarView CreatePlatformView()
 	{
 		return new UICalendarView();
 	}
 
+	protected override void ConnectHandler(UICalendarView platformView)
+	{
+		base.ConnectHandler(platformView);
+		calendarSelection = new UICalendarSelectionSingleDate(new CalendarSelectionSingleDateDelegate(VirtualView));
+		platformView.SelectionBehavior = calendarSelection;
+	}
+
 	private static void MapFirstDayOfWeek(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		handler.PlatformView.Calendar.FirstWeekDay = (nuint)virtualView.FirstDayOfWeek;
 	}
+
 	private static void MapMinDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		SetDateRange(handler, virtualView);
 	}
 
 	private static void MapMaxDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		SetDateRange(handler, virtualView);
 	}
 
 	private static void MapSelectedDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		if (handler.calendarSelection is UICalendarSelectionSingleDate calendarSelection)
+		{
+			MapSingleDateSelection(calendarSelection, virtualView);
+		}
+	}
+
+	private static void MapSingleDateSelection(UICalendarSelectionSingleDate calendarSelection, ICalendarView virtualView)
+	{
+		if (virtualView.SelectedDate is null)
+		{
+			calendarSelection.SetSelectedDate(null, true);
+			return;
+		}
+
+		calendarSelection.SetSelectedDate(new NSDateComponents()
+		{
+			Day = virtualView.SelectedDate.Value.Day,
+			Month = virtualView.SelectedDate.Value.Month,
+			Year = virtualView.SelectedDate.Value.Year
+		}, true);
+	}
+
+	private static void SetDateRange(CalendarHandler handler, ICalendarView virtualView)
+	{
+		var fromDateComponents = virtualView.MinDate.Date.ToNSDate();
+		var toDateComponents = virtualView.MaxDate.Date.ToNSDate();
+
+		var calendarViewDateRange = new NSDateInterval(fromDateComponents, toDateComponents);
+		handler.PlatformView.AvailableDateRange = calendarViewDateRange;
 	}
 }

MauiBells/Platforms/Tizen/CalendarHandler.cs

@@ -1,21 +1,22 @@
 namespace MauiBells.Calendar;
 
 using Microsoft.Maui.Handlers;
+using Tizen.NUI.BaseComponents.View;
 
-public partial class CalendarHandler : ViewHandler<ICalendarView, CalendarView>
+public partial class CalendarHandler : ViewHandler<ICalendarView, Calendar>
 {
-	protected override CalendarView CreatePlatformView()
+	protected override Calendar CreatePlatformView()
 	{
-		return new CalendarView();
+		return new Calendar();
 	}
 
 	private static void MapFirstDayOfWeek(CalendarHandler handler, ICalendarView virtualView)
 	{
-		
+
 	}
 	private static void MapMinDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-		
+
 	}
 
 	private static void MapMaxDate(CalendarHandler handler, ICalendarView virtualView)
@@ -25,6 +26,6 @@ private static void MapMaxDate(CalendarHandler handler, ICalendarView virtualVie
 
 	private static void MapSelectedDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-		
+
 	}
 }

MauiBells/Platforms/iOS/CalendarHandler.cs

@@ -1,31 +1,89 @@
 namespace MauiBells.Calendar;
 
+using Foundation;
 using Microsoft.Maui.Handlers;
+using Microsoft.Maui.Platform;
+using ObjCRuntime;
 using UIKit;
 
+public sealed class CalendarSelectionSingleDateDelegate(ICalendarView calendarView)
+	: IUICalendarSelectionSingleDateDelegate
+{
+	public void DidSelectDate(UICalendarSelectionSingleDate calendarSelection, NSDateComponents? date)
+	{
+		calendarSelection.SelectedDate = date;
+		calendarView.SelectedDate = date?.Date.ToDateTime();
+		calendarView.OnSelectedDateChanged(date?.Date.ToDateTime());
+	}
+
+	public void Dispose()
+	{
+	}
+
+	public NativeHandle Handle { get; }
+}
+
 public partial class CalendarHandler : ViewHandler<ICalendarView, UICalendarView>
 {
+	private UICalendarSelection? calendarSelection;
+
 	protected override UICalendarView CreatePlatformView()
 	{
 		return new UICalendarView();
 	}
 
+	protected override void ConnectHandler(UICalendarView platformView)
+	{
+		base.ConnectHandler(platformView);
+		calendarSelection = new UICalendarSelectionSingleDate(new CalendarSelectionSingleDateDelegate(VirtualView));
+		platformView.SelectionBehavior = calendarSelection;
+	}
+
 	private static void MapFirstDayOfWeek(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		handler.PlatformView.Calendar.FirstWeekDay = (nuint)virtualView.FirstDayOfWeek;
 	}
+
 	private static void MapMinDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		SetDateRange(handler, virtualView);
 	}
 
 	private static void MapMaxDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		SetDateRange(handler, virtualView);
 	}
 
 	private static void MapSelectedDate(CalendarHandler handler, ICalendarView virtualView)
 	{
-
+		if (handler.calendarSelection is UICalendarSelectionSingleDate calendarSelection)
+		{
+			MapSingleDateSelection(calendarSelection, virtualView);
+		}
+	}
+
+	private static void MapSingleDateSelection(UICalendarSelectionSingleDate calendarSelection, ICalendarView virtualView)
+	{
+		if (virtualView.SelectedDate is null)
+		{
+			calendarSelection.SetSelectedDate(null, true);
+			return;
+		}
+
+		calendarSelection.SetSelectedDate(new NSDateComponents()
+		{
+			Day = virtualView.SelectedDate.Value.Day,
+			Month = virtualView.SelectedDate.Value.Month,
+			Year = virtualView.SelectedDate.Value.Year
+		}, true);
+	}
+
+	private static void SetDateRange(CalendarHandler handler, ICalendarView virtualView)
+	{
+		var fromDateComponents = virtualView.MinDate.Date.ToNSDate();
+		var toDateComponents = virtualView.MaxDate.Date.ToNSDate();
+
+		var calendarViewDateRange = new NSDateInterval(fromDateComponents, toDateComponents);
+		handler.PlatformView.AvailableDateRange = calendarViewDateRange;
 	}
 }