SubPropertyDescriptor.cs

/*! \file
Copyright (C) 2016-2018 Verizon. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

using System;
using System.ComponentModel;

namespace AcUtils
{
    /// <summary>
    /// Support TypeDescriptionProvider attribute on AcUser.
    /// </summary>
    public class SubPropertyDescriptor : PropertyDescriptor
    {
        private PropertyDescriptor _subPD;
        private PropertyDescriptor _parentPD;

        public SubPropertyDescriptor(PropertyDescriptor parentPD, PropertyDescriptor subPD, string pdname)
            : base(pdname,null)
        {
            _subPD = subPD;
            _parentPD = parentPD;
        }

        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 Type ComponentType
        {
            get { return _parentPD.ComponentType; }
        }

        public override Type PropertyType { get { return _subPD.PropertyType; } }

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

        public override void SetValue(object component, object value)
        {
            _subPD.SetValue(_parentPD.GetValue(component), value);
            OnValueChanged(component, EventArgs.Empty);
        }
    }
}