Create EventToCommand.Slider.ValueChanged.cs

NuGet/RapidXaml.MAUI/EventToCommand/EventToCommand.Slider.ValueChanged.cs

@@ -0,0 +1,66 @@
+using System.Windows.Input;
+
+namespace RapidXaml;
+
+public partial class EventToCommand : BindableObject
+{
+	public static ICommand GetValueChanged(BindableObject obj)
+		=> (ICommand)obj.GetValue(ValueChangedProperty);
+
+	public static void SetValueChanged(BindableObject obj, ICommand value)
+		=> obj.SetValue(ValueChangedProperty, value);
+
+	public static readonly BindableProperty ValueChangedProperty =
+		BindableProperty.CreateAttached("ValueChanged", typeof(ICommand), typeof(EventToCommand), defaultValue: null, propertyChanged: OnValueChangedChanged);
+
+	private static void OnValueChangedChanged(BindableObject bindable, object oldValue, object newValue)
+	{
+		if (bindable is Slider sldr)
+		{
+			if (oldValue is ICommand oldCmd)
+			{
+				for (int i = sldr.Behaviors.Count; i >= 0; i--)
+				{
+					if (sldr.Behaviors[i] is EventToCommandValueChangedBehavior oldBehavior && oldBehavior.CommandToInvoke == oldCmd)
+					{
+						sldr.Behaviors.Remove(oldBehavior);
+						break;
+					}
+				}
+			}
+
+			if (newValue is ICommand newCmd)
+			{
+				sldr.Behaviors.Add(new EventToCommandValueChangedBehavior { CommandToInvoke = newCmd });
+			}
+		}
+	}
+
+	internal partial class EventToCommandValueChangedBehavior : Behavior<Slider>
+	{
+		public ICommand? CommandToInvoke { get; set; }
+
+		protected override void OnAttachedTo(Slider sldr)
+		{
+			sldr.ValueChanged += OnSliderValueChanged;
+			base.OnAttachedTo(sldr);
+		}
+
+		protected override void OnDetachingFrom(Slider sldr)
+		{
+			sldr.ValueChanged -= OnSliderValueChanged;
+			base.OnDetachingFrom(sldr);
+		}
+
+		private void OnSliderValueChanged(object? sender, EventArgs e)
+		{
+			if (this.CommandToInvoke != null)
+			{
+				if (this.CommandToInvoke.CanExecute(null))
+				{
+					this.CommandToInvoke.Execute(null);
+				}
+			}
+		}
+	}
+}