(en) ReactiveProperty factory extensions.

ReactiveProperty2.cs

// This file is under The MIT License (MIT).
using Reactive.Bindings;
using System;
using System.Linq.Expressions;
using System.Reactive.Concurrency;

namespace Mntone.Reactive.Bindings
{
	public static class ReactiveProperty2
	{
		#region Int16 section

		public static ReactiveProperty<string> FromInt16<TTarget>(
			TTarget target,
			Expression<Func<TTarget, short>> propertySelector,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return FromInt16(target, propertySelector, UIDispatcherScheduler.Default, mode, ignoreValidationErrorValue);
		}

		public static ReactiveProperty<string> FromInt16<TTarget>(
			TTarget target,
			Expression<Func<TTarget, short>> propertySelector,
			IScheduler raiseEventScheduler,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return ReactiveProperty.FromObject(
				target,
				propertySelector,
				x => x.ToString(),
				x => string.IsNullOrWhiteSpace(x) || (x.Length == 1 && x[0] == '-')
					? (short)0
					: Convert.ToInt16(x),
				raiseEventScheduler,
				mode,
				ignoreValidationErrorValue);
		}

		#endregion

		#region Int32 section

		public static ReactiveProperty<string> FromInt32<TTarget>(
			TTarget target,
			Expression<Func<TTarget, int>> propertySelector,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return FromInt32(target, propertySelector, UIDispatcherScheduler.Default, mode, ignoreValidationErrorValue);
		}

		public static ReactiveProperty<string> FromInt32<TTarget>(
			TTarget target,
			Expression<Func<TTarget, int>> propertySelector,
			IScheduler raiseEventScheduler,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return ReactiveProperty.FromObject(
				target,
				propertySelector,
				x => x.ToString(),
				x => string.IsNullOrWhiteSpace(x) || (x.Length == 1 && x[0] == '-')
					? 0
					: Convert.ToInt32(x),
				raiseEventScheduler,
				mode,
				ignoreValidationErrorValue);
		}

		#endregion

		#region Int64 section

		public static ReactiveProperty<string> FromInt64<TTarget>(
			TTarget target,
			Expression<Func<TTarget, long>> propertySelector,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return FromInt64(target, propertySelector, UIDispatcherScheduler.Default, mode, ignoreValidationErrorValue);
		}

		public static ReactiveProperty<string> FromInt64<TTarget>(
			TTarget target,
			Expression<Func<TTarget, long>> propertySelector,
			IScheduler raiseEventScheduler,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return ReactiveProperty.FromObject(
				target,
				propertySelector,
				x => x.ToString(),
				x => string.IsNullOrWhiteSpace(x) || (x.Length == 1 && x[0] == '-')
					? 0
					: Convert.ToInt64(x),
				raiseEventScheduler,
				mode,
				ignoreValidationErrorValue);
		}

		#endregion

		#region Enum (derived from Int16) for RxProp<Int32> section

		public static ReactiveProperty<int> FromEnumDerivedFromInt16ToReactivePropertyOfInt32<TTarget, TEnumProperty>(
			TTarget target,
			Expression<Func<TTarget, TEnumProperty>> propertySelector,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return FromEnumDerivedFromInt16ToReactivePropertyOfInt32(target, propertySelector, UIDispatcherScheduler.Default, mode, ignoreValidationErrorValue);
		}

		public static ReactiveProperty<int> FromEnumDerivedFromInt16ToReactivePropertyOfInt32<TTarget, TEnumProperty>(
			TTarget target,
			Expression<Func<TTarget, TEnumProperty>> propertySelector,
			IScheduler raiseEventScheduler,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return ReactiveProperty.FromObject(
				target,
				propertySelector,
				x => Convert.ToInt32(x),
				x => (TEnumProperty)((object)Convert.ToInt16((object)x)),
				raiseEventScheduler,
				mode,
				ignoreValidationErrorValue);
		}

		#endregion

		#region Enum (derived from Int32) for RxProp<Int32> section

		public static ReactiveProperty<int> FromEnumDerivedFromInt32ToReactivePropertyOfInt32<TTarget, TEnumProperty>(
			TTarget target,
			Expression<Func<TTarget, TEnumProperty>> propertySelector,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return FromEnumDerivedFromInt32ToReactivePropertyOfInt32(target, propertySelector, UIDispatcherScheduler.Default, mode, ignoreValidationErrorValue);
		}

		public static ReactiveProperty<int> FromEnumDerivedFromInt32ToReactivePropertyOfInt32<TTarget, TEnumProperty>(
			TTarget target,
			Expression<Func<TTarget, TEnumProperty>> propertySelector,
			IScheduler raiseEventScheduler,
			ReactivePropertyMode mode = ReactivePropertyMode.DistinctUntilChanged | ReactivePropertyMode.RaiseLatestValueOnSubscribe,
			bool ignoreValidationErrorValue = false)
		{
			return ReactiveProperty.FromObject(
				target,
				propertySelector,
				x => Convert.ToInt32(x),
				x => (TEnumProperty)((object)x),
				raiseEventScheduler,
				mode,
				ignoreValidationErrorValue);
		}

		#endregion
	}
}