WPF Control Factory

using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Text;
using Pfz.DataTypes;

namespace Pfz.WpfControls
{
	/// <summary>
	/// This class allows to convert strings to full observable-collections of
	/// PropertyBounds.
	/// Examples:
	/// FullTypeName.* (which will get all properties)
	/// FullTypeName:PropertyName,200;OtherPropertyName,100
	/// FullTypeName:PropertyName,2*=Display name;OtherPropertyName,*=Other display name
	/// FullTypeName.PropertyName=Display name;OtherFullTypeName.PropertyName=Other display name
	/// </summary>
	public class GridPropertyBindingsTypeConverter:
		TypeConverter
	{
		/// <summary>
		/// Returns true for strings.
		/// </summary>
		public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
		{
			return sourceType == typeof(string);
		}

		/// <summary>
		/// Returns true for strings.
		/// </summary>
		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
		{
			return destinationType == typeof(string);
		}
		
		/// <summary>
		/// Creates a GridPropertyBinding from a string.
		/// </summary>
		public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
		{
			string strValue = value as string;
			//MessageBox.Show(strValue);
			if (string.IsNullOrEmpty(strValue))
				return null;
				
			if (strValue.EndsWith(".*"))
			{
				strValue = strValue.Substring(0, strValue.Length-2);
				Type type = TypeWrapperTypeConverter.ConvertFrom(strValue).Value;
				if (type == null)
					return null;
				
				var propertyInfos = type.GetProperties();
				int count = propertyInfos.Length;
				var propertyBounds = new GridPropertyBinding[count];
				for(int i=0; i<count; i++)
					propertyBounds[i] = new GridPropertyBinding { Property = propertyInfos[i] };
					
				return new ObservableCollection<GridPropertyBinding>(propertyBounds);
			}
			
			string prefix = null;
			int pos = strValue.IndexOf(':');
			if (pos != -1)
			{
				prefix = strValue.Substring(0, pos) + '.';
				strValue = strValue.Substring(pos+1);
			}
			
			string[] propertyBoundStrings = strValue.Split(';');
			int count2 = propertyBoundStrings.Length;
			GridPropertyBinding[] list = new GridPropertyBinding[count2];
			for(int i=0; i<count2; i++)
			{
				string propertyBoundString = propertyBoundStrings[i];
				
				if (prefix != null & propertyBoundString.IndexOf('.') == -1)
					propertyBoundString = prefix + propertyBoundString;
					
				GridPropertyBinding propertyBound = GridPropertyBindingTypeConverter.ConvertFrom(propertyBoundString);
				list[i] = propertyBound;
			}
			return new ObservableCollection<GridPropertyBinding>(list);
		}
		
		/// <summary>
		/// Gets the string representation of a grid property binding.
		/// </summary>
		public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
		{
			var collection = value as ObservableCollection<GridPropertyBinding>;
			if (collection == null)
				return null;
			
			if (collection.Count == 0)
				return "";
				
			StringBuilder result = new StringBuilder();
			foreach(var propertyBound in collection)
			{
				string propertyBoundString = GridPropertyBindingTypeConverter.ConvertTo(propertyBound);
				result.Append(propertyBoundString);
				result.Append(';');
			}
			result.Length--;
			
			return result.ToString();
		}
	}
}