//------------------------------------------------------------------------------
// <copyright file="DataGridViewColumnConverter.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
//------------------------------------------------------------------------------
 
/*
 */
namespace System.Windows.Forms {
    using System.Runtime.Serialization.Formatters;
    using System.Runtime.Remoting;
    using System.Runtime.InteropServices;
 
    using Microsoft.Win32;
    using System.Collections;
    using System.ComponentModel;
    using System.ComponentModel.Design.Serialization;
    using System.Drawing;
    using System.Diagnostics;
    using System.Globalization;
    using System.Reflection;
    
    internal class DataGridViewColumnConverter : ExpandableObjectConverter {
    
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
            if (destinationType == typeof(InstanceDescriptor)) {
                return true;
            }
            return base.CanConvertTo(context, destinationType);
        }
        
        /// <devdoc>
        ///      Converts the given object to another type.  The most common types to convert
        ///      are to and from a string object.  The default implementation will make a call
        ///      to ToString on the object if the object is valid and if the destination
        ///      type is string.  If this cannot convert to the desitnation type, this will
        ///      throw a NotSupportedException.
        /// </devdoc>
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
            if (destinationType == null) {
                throw new ArgumentNullException("destinationType");
            }
 
            DataGridViewColumn dataGridViewColumn = value as DataGridViewColumn;
            if (destinationType == typeof(InstanceDescriptor) && dataGridViewColumn != null) {
                ConstructorInfo ctor;
                
                // public DataGridViewColumn(Type cellType)
                // 
                if (dataGridViewColumn.CellType != null) {
                    ctor = dataGridViewColumn.GetType().GetConstructor(new Type[] { typeof(Type) });
                    if (ctor != null) {
                        return new InstanceDescriptor(ctor, new object[] { dataGridViewColumn.CellType }, false);
                    }       
                }
 
                // public DataGridViewColumn()
                // 
                ctor = dataGridViewColumn.GetType().GetConstructor(new Type[0]);
                if (ctor != null) {
                    return new InstanceDescriptor(ctor, new object[0], false);
                }
            }
            
            return base.ConvertTo(context, culture, value, destinationType);
        }        
    }    
}