DictionaryChange.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 / DictionaryChange.cs / 1305376 / DictionaryChange.cs
                        

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

namespace System.Activities.Presentation.Model 
{
    using System; 
    using System.Collections.Generic; 
    using System.Text;
    using System.Runtime; 

    class DictionaryChange : ModelChange
    {
        public ModelItemDictionary Dictionary { get; set; } 

        public OperationType Operation { get; set; } 
 
        public ModelItem Key { get; set; }
 
        public ModelItem Value { get; set; }

        public ModelTreeManager ModelTreeManager { get; set; }
 
        public override string Description
        { 
            get 
            {
                return this.Operation == OperationType.Insert ? SR.DictionaryAddEditingScopeDescription : SR.DictionaryRemoveEditingScopeDescription; 
            }
        }

        public override bool Apply() 
        {
            switch (this.Operation) 
            { 
                case OperationType.Insert:
                    ApplyInsert(); 
                    break;
                case OperationType.Delete:
                    ApplyDelete();
                    break; 
                default:
                    Fx.Assert("Operation should be Insert or Delete"); 
                    break; 
            }
            return true; 
        }

        private void ApplyDelete()
        { 
            ((ModelItemDictionaryImpl)this.Dictionary).RemoveCore(this.Key);
            ((IModelTreeItem)this.Key).RemoveParent(this.Dictionary); 
            this.ModelTreeManager.ReleaseModelItem(this.Key, this.Dictionary); 
            if (null != this.Value)
            { 
                ((IModelTreeItem)this.Value).RemoveParent(this.Dictionary);
            }
            this.ModelTreeManager.ReleaseModelItem(this.Key, this.Dictionary);
            this.ModelTreeManager.modelService.OnModelItemRemoved(this.Key); 
            if (null != this.Value)
            { 
                this.ModelTreeManager.modelService.OnModelItemRemoved(this.Value); 
            }
        } 

        private void ApplyInsert()
        {
            this.ModelTreeManager.ReAddModelItemToModelTree(this.Key); 
            this.ModelTreeManager.ReAddModelItemToModelTree(this.Value);
            ((ModelItemDictionaryImpl)this.Dictionary).AddCore(this.Key, this.Value); 
            this.ModelTreeManager.modelService.OnModelItemAdded(this.Key); 
            if (null != this.Value)
            { 
                this.ModelTreeManager.modelService.OnModelItemAdded(this.Value);
            }
        }
 
        public override Change GetInverse()
        { 
            OperationType reverseOperation = this.Operation == OperationType.Insert ? OperationType.Delete : OperationType.Insert; 
            return new DictionaryChange()
                { 
                    Dictionary = this.Dictionary,
                    Operation = reverseOperation,
                    Key = this.Key,
                    Value = this.Value, 
                    ModelTreeManager = this.ModelTreeManager,
                }; 
        } 

        public enum OperationType 
        {
            Insert, Delete
        }
    } 
}

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

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