using System.Collections.Generic;
using System.ComponentModel.Design;

namespace Netron.Diagramming.Core {
  /// <summary>
  /// This editor is used to edit items from e.g. the <see cref="FolderMaterial"/> via the property grid. This is a generic editor so it
  /// can be used to edit any collection of <see cref="IShapeMaterial"/> items.
  /// </summary>
  /// <typeparam name="T"></typeparam>
  public class ShapeMaterialCollectionEditor<T> : CollectionEditor where T : IShapeMaterial {
    /// <summary>
    /// Initializes a new instance of the <see cref="T:ShapeMaterialCollectionEditor&lt;T&gt;"/> class.
    /// </summary>
    public ShapeMaterialCollectionEditor()
      : base(typeof(List<T>)) { }

    /// <summary>
    /// Sets the items.
    /// </summary>
    /// <param name="editValue">The edit value.</param>
    /// <param name="value">The value.</param>
    /// <returns></returns>
    protected override object SetItems(object editValue, object[] value) {
      CollectionBase<IShapeMaterial> entries = editValue as CollectionBase<IShapeMaterial>;
      entries.Clear();
      for (int k = 0; k < value.Length; k++) {
        entries.Add(value[k] as IShapeMaterial);
      }
      object retValue = base.SetItems(entries, value);
      return retValue;
    }
  }
}