PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
{
PropertyDescriptorCollection props = _propCache;
if (props != null)
{
return(props);
}
// Create the property collection and filter if necessary
props = new PropertyDescriptorCollection(null);
//foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(_target, attributes, true))
//{
// props.Add(prop);
//}
foreach (FieldInfo field in _target.GetType().GetFields())
{
Attribute[] attrs = (Attribute[])field.GetCustomAttributes(typeof(Attribute), true);
int n = attrs.Length;
PropertyDescriptor fieldDesc;
if (field.FieldType.IsPrimitive || field.FieldType.IsEnum || field.FieldType == typeof(Guid) ||
field.FieldType == typeof(System.Drawing.Size))
{
Array.Resize <Attribute>(ref attrs, n + 1);
attrs[n] = new ReadOnlyAttribute(true);
object fld_value = field.GetValue(_target);
string str = fld_value.ToString();
if ((field.FieldType != typeof(Guid)) && (fld_value is IFormattable) && (str.Length > 1))
{
StringBuilder sb = new StringBuilder();
IFormattable frm = (IFormattable)fld_value;
string hex = frm.ToString("X", Thread.CurrentThread.CurrentCulture);
if (field.Name == "Compression")
{
UInt32 ival = UInt32.Parse(str);
char[] fourcc = new char[4];
fourcc[0] = (char)(ival & 0xFF);
fourcc[1] = (char)((ival >> 8) & 0xFF);
fourcc[2] = (char)((ival >> 16) & 0xFF);
fourcc[3] = (char)((ival >> 24) & 0xFF);
sb.Append("'");
sb.Append(fourcc);
sb.Append("' " + str + " (0x" + hex + ")");
}
else
{
sb.Append(str + " (0x" + hex + ")");
}
str = sb.ToString();
}
fieldDesc = new CustomFieldPropertyDescriptor(str, attrs, field.Name, _target.GetType());
//fieldDesc = new FieldPropertyDescriptor(field, attrs);
}
else
{
Array.Resize <Attribute>(ref attrs, n + 2);
attrs[n] = new ReadOnlyAttribute(true);
attrs[n + 1] = new TypeConverterAttribute(typeof(ExpandableObjectConverter));
object fld_value = new FieldsToPropertiesProxyTypeDescriptor(field.GetValue(_target));
fieldDesc = new CustomFieldPropertyDescriptor(fld_value, attrs, field.Name, _target.GetType());
}
props.Add(fieldDesc);
}
_propCache = props;
return(props);
}
public MTProps(AMMediaType pmt, IntPtr pFormat)
: base(pmt)
{
format = (T)Marshal.PtrToStructure(pFormat, typeof(T));
format_ftp = new FieldsToPropertiesProxyTypeDescriptor(format);
}
