private IObservable<object> CreateObservableFromNodes(IEnumerable<InpcNode> subscriptions)
{
return subscriptions.Select(
subscription => Observable.FromEventPattern<PropertyChangedEventHandler, PropertyChangedEventArgs>(
ev => subscription.Parent.PropertyChanged += ev,
handler => subscription.Parent.PropertyChanged -= handler)
.Do(_ => this.mountPoint = new PropertyMountPoint(this.root, this.propertyPath))
.Where(pattern => pattern.EventArgs.PropertyName == subscription.PropertyName))
.Merge();
}
public ObservablePropertyBranch(object root, PropertyPath propertyPath)
{
Guard.ThrowIfNull(root, nameof(root));
Guard.ThrowIfNull(propertyPath, nameof(propertyPath));
this.root = root;
this.propertyPath = propertyPath;
this.mountPoint = new PropertyMountPoint(root, propertyPath);
var subscriptions = this.GetInpcNodes();
this.Changed = this.CreateObservableFromNodes(subscriptions);
}
public ObservablePropertyBranch(object instance, PropertyPath propertyPath)
{
Guard.ThrowIfNull(instance, nameof(instance));
Guard.ThrowIfNull(propertyPath, nameof(propertyPath));
_instance = instance;
_propertyPath = propertyPath;
_mountPoint = new PropertyMountPoint(instance, propertyPath);
var properties = GetPropertiesThatRaiseNotifications();
Values = CreateUnifiedObservableFromNodes(properties);
}
public ObservablePropertyBranch(object instance, PropertyPath propertyPath)
{
Guard.ThrowIfNull(instance, nameof(instance));
Guard.ThrowIfNull(propertyPath, nameof(propertyPath));
_instance = instance;
_propertyPath = propertyPath;
_mountPoint = new PropertyMountPoint(instance, propertyPath);
var properties = GetPropertiesThatRaiseNotifications();
Values = CreateUnifiedObservableFromNodes(properties);
}