/// <summary>
/// A <see cref="System.ComponentModel.PropertyDescriptor" /> for nested
/// properties. That is for properties of properties.
/// </summary>
/// <param name="type">The component type for which the nested property belongs.</param>
/// <param name="propertyName">
/// The nested property name specified using dot notation. This should not contain
/// the name of component itself.
/// </param>
public NestedPropertyDescriptor(Type type, string propertyName)
: base(Check.NotEmpty(propertyName, "propertyName"), null)
{
Check.NotNull(type, "type");
var propMap = propertyName.Split('.');
Type currtype = type;
_parentPD = null;
int i = 0;
do
{
_currentPD = TypeDescriptor.GetProperties(currtype).Find(propMap[i], false);
if (_currentPD == null)
{
throw new ArgumentException("The specified nested property does not exist.", "propertyName");
}
i++;
if (i == propMap.Length)
{
break;
}
_parentPD = new NestedPropertyDescriptor(_currentPD, _parentPD);
currtype = _currentPD.PropertyType;
}while (true);
}
/// <summary>
/// A <see cref="System.ComponentModel.PropertyDescriptor" /> for nested
/// properties. That is for properties of properties.
/// </summary>
/// <param name="type">The component type for which the nested property belongs.</param>
/// <param name="propertyName">
/// The nested property name specified using dot notation. This should not contain
/// the name of component itself.
/// </param>
public NestedPropertyDescriptor(Type type, string propertyName)
: base(Check.NotEmpty(propertyName, "propertyName"), null)
{
Check.NotNull(type, "type");
var propMap = propertyName.Split('.');
Type currtype = type;
_parentPD = null;
int i = 0;
do
{
_currentPD = TypeDescriptor.GetProperties(currtype).Find(propMap[i], false);
if (_currentPD == null)
throw new ArgumentException("The specified nested property does not exist.", "propertyName");
i++;
if (i == propMap.Length)
break;
_parentPD = new NestedPropertyDescriptor(_currentPD, _parentPD);
currtype = _currentPD.PropertyType;
}
while (true);
}
private NestedPropertyDescriptor(PropertyDescriptor pd, NestedPropertyDescriptor parent = null)
: base(parent == null
? DebugCheck.NotNull(pd, "pd").Name
: string.Format("{0}.{1}", parent.Name, DebugCheck.NotNull(pd, "pd").Name),
null)
{
_currentPD = pd;
_parentPD = parent;
}
private NestedPropertyDescriptor(PropertyDescriptor pd, NestedPropertyDescriptor parent = null)
: base(parent == null
? DebugCheck.NotNull(pd, "pd").Name
: string.Format("{0}.{1}", parent.Name, DebugCheck.NotNull(pd, "pd").Name),
null)
{
_currentPD = pd;
_parentPD = parent;
}
/// <summary>
/// Create a new <see cref="NestedPropertyChangeNotifier{T}" /> for type T and the
/// given depth of nested properties.
/// </summary>
public NestedPropertyChangedNotifier(int depth = 1)
{
CascadeNotifications = true;
this.depth = depth;
var pds = NestedPropertyDescriptor.GetNestedProperties(typeof(T), depth);
properties = pds.ToDictionary(pd => pd.Name);
var npcPds = pds.Where(npd =>
typeof(INotifyPropertyChanged).IsAssignableFrom(npd.PropertyType) &&
npd.PropertyDepth != depth);
notifiers = new Dictionary <string, InnerNotifier>();
foreach (var npd in npcPds)
{
var notifier = new InnerNotifier(npd);
notifiers[npd.Name] = notifier;
notifier.PropertyChanged += NestedPropertyChanged;
}
}
private static IEnumerable <NestedPropertyDescriptor> GetNestedProperties(
Type type, int depth = 1, bool includeValueTypes = false, NestedPropertyDescriptor parent = null)
{
Debug.Assert(depth >= 0);
if (!includeValueTypes && (type.IsValueType || type == typeof(string)))
{
yield break;
}
foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(type))
{
var npd = new NestedPropertyDescriptor(pd, parent);
yield return(npd);
if (depth > 0)
{
foreach (var childpd in GetNestedProperties(npd.PropertyType, depth - 1, includeValueTypes, npd))
{
yield return(childpd);
}
}
}
}
private static IEnumerable<NestedPropertyDescriptor> GetNestedProperties(
Type type, int depth = 1, bool includeValueTypes = false, NestedPropertyDescriptor parent = null)
{
Debug.Assert(depth >= 0);
if (!includeValueTypes && (type.IsValueType || type == typeof(string)))
yield break;
foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(type))
{
var npd = new NestedPropertyDescriptor(pd, parent);
yield return npd;
if (depth > 0)
{
foreach (var childpd in GetNestedProperties(npd.PropertyType, depth - 1, includeValueTypes, npd))
yield return childpd;
}
}
}
