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// --------------------------------------------------------------------------------------------------------------------
// <copyright company="HandBrake Project (http://handbrake.fr)" file="PropertyChangedBase.cs">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// A base class that implements the infrastructure for property change notification and automatically performs UI thread marshalling.
// Borrowed from Caliburn Micro
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Utilities
{
using System;
using System.ComponentModel;
using System.Linq.Expressions;
using System.Runtime.Serialization;
using INotifyPropertyChangedEx = HandBrakeWPF.Utilities.Interfaces.INotifyPropertyChangedEx;
/// <summary>
/// A base class that implements the infrastructure for property change notification and automatically performs UI thread marshalling.
/// </summary>
[Serializable]
public class PropertyChangedBase : INotifyPropertyChangedEx, INotifyPropertyChanged
{
[NonSerialized]
private bool isNotifying;
/// <summary>
/// Gets or sets a value indicating whether the Enables/Disables property change notification.
/// </summary>
[Browsable(false)]
public bool IsNotifying
{
get
{
return this.isNotifying;
}
set
{
this.isNotifying = value;
}
}
/// <summary>
/// Occurs when a property value changes.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged = (param0, param1) => { };
/// <summary>
/// Initializes a new instance of the <see cref="PropertyChangedBase"/> class.
/// Creates an instance of <see cref="T:HandBrakeWPF.Utilities.PropertyChangedBase"/>.
/// </summary>
public PropertyChangedBase()
{
this.IsNotifying = true;
}
/// <summary>
/// Raises a change notification indicating that all bindings should be refreshed.
/// </summary>
public void Refresh()
{
this.NotifyOfPropertyChange(string.Empty);
}
/// <summary>
/// Notifies subscribers of the property change.
/// </summary>
/// <param name="propertyName">Name of the property.</param>
public virtual void NotifyOfPropertyChange(string propertyName)
{
if (!this.IsNotifying)
return;
Execute.OnUIThread((System.Action)(() => this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName))));
}
/// <summary>
/// Notifies subscribers of the property change.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam><param name="property">The property expression.</param>
public void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property)
{
this.NotifyOfPropertyChange(ExtensionMethods.GetMemberInfo((Expression)property).Name);
}
/// <summary>
/// Called when the object is deserialized.
/// </summary>
/// <param name="c">The streaming context.</param>
[OnDeserialized]
public void OnDeserialized(StreamingContext c)
{
this.IsNotifying = true;
}
/// <summary>
/// Used to indicate whether or not the IsNotifying property is serialized to Xml.
/// </summary>
/// <returns>
/// Whether or not to serialize the IsNotifying property. The default is false.
/// </returns>
public virtual bool ShouldSerializeIsNotifying()
{
return false;
}
/// <summary>
/// Raises the <see cref="E:PropertyChanged"/> event directly.
/// </summary>
/// <param name="e">The <see cref="T:System.ComponentModel.PropertyChangedEventArgs"/> instance containing the event data.</param>
[EditorBrowsable(EditorBrowsableState.Never)]
protected void OnPropertyChanged(PropertyChangedEventArgs e)
{
PropertyChangedEventHandler changedEventHandler = this.PropertyChanged;
if (changedEventHandler == null)
return;
changedEventHandler((object)this, e);
}
}
}
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