| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | namespace WixToolset.WixBA |
| 4 | { |
| 5 | using System; |
| 6 | using System.ComponentModel; |
| 7 | using System.Diagnostics; |
| 8 | |
| 9 | /// <summary> |
| 10 | /// It provides support for property change notifications. |
| 11 | /// </summary> |
| 12 | public abstract class PropertyNotifyBase : INotifyPropertyChanged |
| 13 | { |
| 14 | /// <summary> |
| 15 | /// Initializes a new instance of the <see cref="PropertyNotifyBase"/> class. |
| 16 | /// </summary> |
| 17 | protected PropertyNotifyBase() |
| 18 | { |
| 19 | } |
| 20 | |
| 21 | /// <summary> |
| 22 | /// Raised when a property on this object has a new value. |
| 23 | /// </summary> |
| 24 | public event PropertyChangedEventHandler PropertyChanged; |
| 25 | |
| 26 | /// <summary> |
| 27 | /// Warns the developer if this object does not have a public property with the |
| 28 | /// specified name. This method does not exist in a Release build. |
| 29 | /// </summary> |
| 30 | /// <param name="propertyName">Property name to verify.</param> |
| 31 | [Conditional("DEBUG")] |
| 32 | [DebuggerStepThrough] |
| 33 | public void VerifyPropertyName(string propertyName) |
| 34 | { |
| 35 | // Verify that the property name matches a real, public, instance property |
| 36 | // on this object. |
| 37 | if (null == TypeDescriptor.GetProperties(this)[propertyName]) |
| 38 | { |
| 39 | Debug.Fail(String.Concat("Invalid property name: ", propertyName)); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /// <summary> |
| 44 | /// Raises this object's PropertyChanged event. |
| 45 | /// </summary> |
| 46 | /// <param name="propertyName">The property that has a new value.</param> |
| 47 | protected virtual void OnPropertyChanged(string propertyName) |
| 48 | { |
| 49 | this.VerifyPropertyName(propertyName); |
| 50 | |
| 51 | PropertyChangedEventHandler handler = this.PropertyChanged; |
| 52 | if (null != handler) |
| 53 | { |
| 54 | PropertyChangedEventArgs e = new PropertyChangedEventArgs(propertyName); |
| 55 | handler(this, e); |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | } |