FakeModelItemImpl.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 / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / Model / FakeModelItemImpl.cs / 1305376 / FakeModelItemImpl.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.Activities.Presentation.Model 
{
 
    ///  
    /// FakeModelItemImpl - purpose of this class is to allow full model editing expirience, without need to participate within model tree operations
    /// If you use this class, even though it contains reference to ModelTreeManager, you are not affecting actual model tree. Any changes made to the 
    /// model, do not result in any undo/redo operations
    /// see aslo DesignObjectWrapper class for more usage details
    /// 
    sealed class FakeModelItemImpl : ModelItemImpl 
    {
        public FakeModelItemImpl(ModelTreeManager modelTreeManager, Type itemType, object instance, FakeModelItemImpl parent) 
            : base(modelTreeManager, itemType, instance, parent) 
        {
        } 

        public override ModelItem Root
        {
            get 
            {
                if (this.Parent == null) 
                { 
                    return this;
                } 
                else
                {
                    return this.Parent.Root;
                } 
            }
        } 
 
        protected override void OnPropertyChanged(string propertyName)
        { 
            IModelTreeItem modelTreeItem = (IModelTreeItem)this;
            ModelItem currentValue;
            //if property value has changed - remove existing value, so the ModelPropertyImplementation will
            //force reading the value from the underlying object 
            if (modelTreeItem.ModelPropertyStore.TryGetValue(propertyName, out currentValue))
            { 
                IModelTreeItem valueAsTreeItem = (IModelTreeItem)currentValue; 
                //cleanup references
                valueAsTreeItem.RemoveParent(this); 
                valueAsTreeItem.RemoveSource(this.Properties[propertyName]);
                //remove from store
                modelTreeItem.ModelPropertyStore.Remove(propertyName);
            } 
            base.OnPropertyChanged(propertyName);
        } 
    } 
}

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

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