FindSimilarActivitiesVerb.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / Workflow / ComponentModel / Design / FindSimilarActivitiesVerb.cs / 1305376 / FindSimilarActivitiesVerb.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.Workflow.ComponentModel.Design
{ 
    using System;
    using System.Collections.Generic; 
    using System.ComponentModel; 
    using System.ComponentModel.Design;
    using System.Runtime; 
    using System.ServiceModel;
    using System.Workflow.ComponentModel;

 
    // 
    // This the the class that implements the Search by menu item displayed on the activityDesigner 
    // this is responsible for finding the matching activity designers and displaying them using 
    // the acticvitydesigner hightlighter.
    //  
    internal class FindSimilarActivitiesVerb : ActivityDesignerVerb where TActivity : Activity
    {
        List matchingActivityDesigner;
        ActivityComparer matchMaker; 
        ActivityDesigner owner;
 
        public FindSimilarActivitiesVerb(ActivityDesigner designer, ActivityComparer matchMaker, string displayText) 
            : base(designer, DesignerVerbGroup.Misc, displayText, new EventHandler(OnInvoke))
        { 
            Fx.Assert(designer != null,
                "Received null for designer parameter to FindSimilarActivitiesVerb ctor.");
            Fx.Assert(matchMaker != null,
                "Received null for matchMaker parameter to FindSimilarActivitiesVerb ctor."); 
            this.owner = designer;
            this.matchMaker = matchMaker; 
        } 

        private static void OnInvoke(object source, EventArgs e) 
        {
            FindSimilarActivitiesVerb designerVerb = source as FindSimilarActivitiesVerb;
            ActivityDesigner activityDesigner = designerVerb.owner;
            List highlightedDesigners = designerVerb.GetMatchingActivityDesigners(activityDesigner); 
            ActivityDesignerHighlighter hightlighter = new ActivityDesignerHighlighter(activityDesigner);
            hightlighter.Highlight(highlightedDesigners); 
        } 

        private ActivityDesigner GetDesigner(Activity activity) 
        {

            IDesignerHost designerHost = this.GetService(typeof(IDesignerHost)) as IDesignerHost;
            return designerHost.GetDesigner(activity as IComponent) as ActivityDesigner; 
        }
 
        private List GetMatchingActivityDesigners(ActivityDesigner activityDesigner) 
        {
            CompositeActivityDesigner rootDesigner = DesignerPainter.GetRootDesigner(activityDesigner); 
            matchingActivityDesigner = new List();

            Walker activityTreeWalker = new Walker();
            activityTreeWalker.FoundActivity += new WalkerEventHandler(OnWalkerFoundActivity); 
            activityTreeWalker.Walk(rootDesigner.Activity);
 
            return matchingActivityDesigner; 
        }
 
        private object GetService(Type serviceType)
        {
            if (serviceType == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceType");
            } 
 
            if (owner.Activity != null && owner.Activity.Site != null)
            { 
                return owner.Activity.Site.GetService(serviceType);
            }
            else
            { 
                return null;
            } 
        } 

        private void OnWalkerFoundActivity(Walker walker, WalkerEventArgs eventArgs) 
        {
            TActivity foundActivity = eventArgs.CurrentActivity as TActivity;
            if (foundActivity != null)
            { 
                if (this.matchMaker((TActivity) owner.Activity, foundActivity))
                { 
                    matchingActivityDesigner.Add(GetDesigner(eventArgs.CurrentActivity)); 
                }
            } 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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