AttachedProperty.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 / AttachedProperty.cs / 1305376 / AttachedProperty.cs
                        

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

namespace System.Activities.Presentation.Model 
{
    using System; 
    using System.Collections.Generic; 
    using System.Linq;
    using System.Text; 
    using System.Activities.Presentation.Model;
    using System.Runtime;
    using System.Diagnostics.CodeAnalysis;
 
    public abstract class AttachedProperty
    { 
        Type ownerType = typeof(object); 

        [SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods", Justification = "By design.")] 
        public abstract Type Type
        {
            get;
        } 

        public abstract bool IsReadOnly 
        { 
            get;
        } 

        public bool IsBrowsable
        {
            get; 
            set;
        } 
 
        public string Name
        { 
            get; set;
        }

        public Type OwnerType 
        {
            get 
            { 
                return this.ownerType;
            } 
            set
            {
                this.ownerType = value;
            } 
        }
 
        public abstract object GetValue(ModelItem modelItem); 
        public abstract void SetValue(ModelItem modelItem, object value);
        public abstract void ResetValue(ModelItem modelItem); 

        public void NotifyPropertyChanged(ModelItem modelItem)
        {
            if (null != modelItem) 
            {
                ((IModelTreeItem)modelItem).OnPropertyChanged(this.Name); 
            } 
        }
    } 


    public class AttachedProperty : AttachedProperty
    { 
        [Fx.Tag.KnownXamlExternal]
        public Func Getter 
        { 
            get; set;
        } 

        [Fx.Tag.KnownXamlExternal]
        public Action Setter
        { 
            get; set;
        } 
 
        public override Type Type
        { 
            get { return typeof(T); }
        }

        public override bool IsReadOnly 
        {
            get { return (this.Setter == null); } 
        } 

        public override object GetValue(ModelItem modelItem) 
        {
            return this.Getter(modelItem);
        }
 
        public override void SetValue(ModelItem modelItem, object Value)
        { 
            if (this.IsReadOnly) 
            {
                throw FxTrace.Exception.AsError(new InvalidOperationException(SR.PropertyIsReadOnly)); 
            }
            this.Setter(modelItem, (T)Value);
            this.NotifyPropertyChanged(modelItem);
        } 

        public override void ResetValue(ModelItem modelItem) 
        { 
            SetValue(modelItem, default(T));
        } 
    }
}

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

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