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Silverlight Experimental Hacks (SLEX) - EventTrigger, PropertyTrigger, ReactiveTrigger, InvokeMethodAction, StoryBoardAction, etc. for Silverlight

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14 Jan 2010CPOL6 min read 41K   241   24  
A set of Silverlight Experimental Hacks (1) A custom implementation of EventTrigger and PropertyTrigger (2) Invoking methods in your view model in MVVM (3) Conditionally invoking triggers and behaviors (4) ReactiveTrigger for exporting your custom events
using System;
using System.Net;
using System.Windows;
using System.Linq;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;
using Slex.Lib.Interactions;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
using System.ComponentModel.Composition.Primitives;

namespace Slex.Lib.Composition
{
    /// <summary>
    /// To compose the available behaviours and triggers, so that they can be imported later
    /// </summary>
    public class SlexPartComposer
    {

        static SlexPartComposer Instance { get; set; }

        [ImportMany]
        public Lazy<Func<object, IObservable<EventResult>>, IExportName>[] Senders { get; set; }

        private SlexPartComposer() { }

        static SlexPartComposer()
        {
            Compose();
        }

        /// <summary>
        /// Resolve an exported function
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static Func<object, IObservable<EventResult>> Resolve(string name)
        {
            var senders = Instance.Senders;

            foreach (var s in senders)
            {
                var x = s.Value;
                var y = s.Metadata;
            }

            return senders.FirstOrDefault(s => s.Metadata.ExportName == name).Value;
        }

        /// <summary>
        /// Compose .. 
        /// </summary>
        public static void Compose(ComposablePartCatalog c)
        {
            Instance = new SlexPartComposer(); 
            var catalog = new AggregateCatalog();
            catalog.Catalogs.Add(c);
            var container = new CompositionContainer(catalog);
            container.ComposeParts(Instance);
            
        }

        internal static void Compose()
        {
            Compose(new AssemblyCatalog(System.Reflection.Assembly.GetExecutingAssembly()));
        }


        



    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Architect
India India
Architect, Developer, Speaker | Wannabe GUT inventor & Data Scientist | Microsoft MVP in C#

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