/// <summary>
/// Send notification of object creation
/// </summary>
/// <param name="context"></param>
/// <param name="obj"></param>
private void SendOnAddNotification(ITypeDescriptorContext context, object obj)
{
DataListAttribute attribute = base.ListAttribute as DataListAttribute;
if ((obj != null) && (attribute != null) && (attribute.EventHandler != null))
{
ObjectCreatedEventArgs arg = new ObjectCreatedEventArgs(obj);
Reflect.CallMethod(context.Instance, attribute.EventHandler, this, arg);
}
}
/// <summary>
/// Create a new object and send notification if requested
/// </summary>
/// <param name="context"></param>
/// <returns>An instantiated object</returns>
private object CreateNewObject(ITypeDescriptorContext context)
{
object obj = null;
DataListAttribute attribute = base.ListAttribute as DataListAttribute;
if ((attribute != null) && (attribute.AddNew))
{
obj = Reflect.CreateInstance(context.PropertyDescriptor.PropertyType, null);
SendOnAddNotification(context, obj);
}
return(obj);
}
/// <summary>
/// Find the list of data to populate the ListBox with
/// </summary>
/// <param name="context"></param>
protected override void RetrieveDataList(ITypeDescriptorContext context)
{
DataListAttribute dataListAttribute = null;
object property = null;
// Find the Attribute that has the path to the List of Items
foreach (Attribute attribute in context.PropertyDescriptor.Attributes)
{
if (attribute is DataListAttribute)
{
dataListAttribute = attribute as DataListAttribute;
base.ListAttribute = dataListAttribute;
break;
}
}
// If we found the Attribute, find the Data List
if (dataListAttribute != null)
{
// Split the path
List <string> path = PathParser.GetPathParts(dataListAttribute.Path);
// The path has 1 or more parts
if ((path != null) && (path.Count > 0))
{
if (dataListAttribute.IsStatic)
{
property = GetStaticProperty(dataListAttribute, path);
}
else
{
// Set the property to the current object
property = GetLocalProperty(path, context.Instance);
}
}
}
// We don't have List of items
if ((property == null) || (!(property is IList)))
{
base.DataList = null;
}
else
{
// Save the DataList
base.DataList = property as IList;
}
}
/// <summary>
/// Get the static field/property/method of the class
/// </summary>
/// <param name="attribute"></param>
/// <param name="path"></param>
/// <returns></returns>
private static object GetStaticProperty(DataListAttribute attribute, IList <string> path)
{
Type type;
object property;
string segment;
int count = 0;
type = ClassType.GetType(attribute.DllName, attribute.ClassName);
segment = path[count++];
property = Reflect.GetStaticDataMember(type, segment);
for ( ; count < path.Count; count++)
{
segment = path[count];
Property propertyInfo = PathParser.BreakVariable(segment);
property = Reflect.GetDataMember(property, propertyInfo.Name);
// If there was a subscript get the data object
if (propertyInfo.Index != null)
{
if (property is IDictionary)
{
property = ((IDictionary)property)[propertyInfo.Index];
}
else if (property is IList)
{
property = ((IList)property)[(int)propertyInfo.Index];
}
}
}
return(property);
}
