FieldPropertyDescriptor.cs :  » Game » RealmForge » Axiom » MathLib » C# / CSharp Open Source

using System;
using System.ComponentModel;
using System.Reflection;

namespace Axiom.MathLib{
  /// <summary>
  /// Describes a field of a type to allow its use with the properties that are retrieved by TypeDescriptor for use by the PropertyGrid
  /// </summary>
  /// <remarks>This is used by the FieldAndPropertyProxyTypeDescriptor to which adds Fields to the list of described properties.</remarks>
  public class FieldPropertyDescriptor : PropertyDescriptor
  {
    #region Fields and Properties
    private FieldInfo field;
    
    public FieldInfo Field { get { return field; } }
    
    public override Type ComponentType { get { return field.DeclaringType; } }

    public override Type PropertyType { get { return field.FieldType; } }
    #endregion

    #region Constructors
    public FieldPropertyDescriptor(object instance, string fieldName) : this(instance, fieldName, BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance)
    {
    }
    public FieldPropertyDescriptor(object instance, string fieldName, BindingFlags flags) : this(instance.GetType().GetField(fieldName,flags))
    {
    }
    public FieldPropertyDescriptor(FieldInfo field) : base(field.Name,
      (Attribute[])field.GetCustomAttributes(typeof(Attribute), true))
    {
      this.field = field;
    }

    #endregion

    #region Overriden Methods
    
    public override bool Equals(object obj)
    {
      FieldPropertyDescriptor other = obj as FieldPropertyDescriptor;
      return other != null && other.field.Equals(field);
    }

    public override int GetHashCode() { return field.GetHashCode(); }

    public override bool IsReadOnly { get { return false; } }

    public override void ResetValue(object component) {}

    public override bool CanResetValue(object component) { return false;}

    public override bool ShouldSerializeValue(object component) { return true; }

    public override object GetValue(object component) 
    { 
      return field.GetValue(component); 
    }

    public override void SetValue(object component, object value) 
    {
      field.SetValue(component, value); 
      OnValueChanged(component, EventArgs.Empty);
    }
    #endregion
  }
}