ELK/FrameworkLocal/UIClient/ClientBase/Command/CommandSource.cs

using System.Windows;

namespace OpenSEMI.ClientBase.Command
{
    public interface ICommandTrigger
    {
        void Initialize(FrameworkElement source);
    }

    public static class CommandSource
    {
       
        public static ICommandTrigger GetTrigger(FrameworkElement source)
        {
            return (ICommandTrigger)source.GetValue(TriggerProperty);
        }

        public static void SetTrigger(FrameworkElement source, ICommandTrigger value)
        {
            source.SetValue(TriggerProperty, value);
        }

        // Using a DependencyProperty as the backing store for Trigger.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty TriggerProperty =
            DependencyProperty.RegisterAttached(
                "Trigger1",
                typeof(ICommandTrigger),
                typeof(CommandSource),
                new UIPropertyMetadata(
                    null,
                    TriggerPropertyChanged));

        private static void TriggerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            FrameworkElement element = d as FrameworkElement;

            ICommandTrigger commandTrigger = e.NewValue as ICommandTrigger;
            if (commandTrigger != null)
            {
                commandTrigger.Initialize(element);
            }
        }
    }
}