internal static WeakPropertyChangedListener CreateIfNecessary(object source, ISourcePropertyChanged sourcePropertyChanged)
{
INotifyPropertyChanged notifyPropertyChanged = source as INotifyPropertyChanged;
if (notifyPropertyChanged == null)
{
return null;
}
return new WeakPropertyChangedListener(notifyPropertyChanged, sourcePropertyChanged);
}
internal static WeakPropertyChangedListener CreateIfNecessary(object source, ISourcePropertyChanged sourcePropertyChanged)
{
INotifyPropertyChanged notifyPropertyChanged = source as INotifyPropertyChanged;
if (notifyPropertyChanged == null)
{
return(null);
}
return(new WeakPropertyChangedListener(notifyPropertyChanged, sourcePropertyChanged));
}
private void PropertyChangedCallback(object sender, PropertyChangedEventArgs args)
{
if (this.weakclrPropertyListener == null)
{
return;
}
ISourcePropertyChanged target = this.weakclrPropertyListener.Target as ISourcePropertyChanged;
if (target == null)
{
this.Disconnect();
return;
}
target.SourcePropertyChanged(sender, args);
}
private WeakPropertyChangedListener(INotifyPropertyChanged notify, ISourcePropertyChanged sourcePropertyChanged)
{
this.notifyPropertyChanged = notify;
notify.PropertyChanged += new PropertyChangedEventHandler(this.PropertyChangedCallback);
this.weakclrPropertyListener = new WeakReference(sourcePropertyChanged);
}
private WeakPropertyChangedListener(INotifyPropertyChanged notify, ISourcePropertyChanged sourcePropertyChanged)
{
this.notifyPropertyChanged = notify;
notify.PropertyChanged += new PropertyChangedEventHandler(this.PropertyChangedCallback);
this.weakclrPropertyListener = new WeakReference(sourcePropertyChanged);
}
