Avalonia/Perspex.Controls/Generators/ItemContainerGenerator`1.cs

// -----------------------------------------------------------------------
// <copyright file="ItemContainerGenerator`1.cs" company="Steven Kirk">
// Copyright 2015 MIT Licence. See licence.md for more information.
// </copyright>
// -----------------------------------------------------------------------

namespace Perspex.Controls.Generators
{
    using Perspex.Controls.Templates;

    /// <summary>
    /// Creates containers for items and maintains a list of created containers.
    /// </summary>
    /// <typeparam name="T">The type of the container.</typeparam>
    public class ItemContainerGenerator<T> : ItemContainerGenerator where T : class, IContentControl, new()
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="ItemContainerGenerator{T}"/> class.
        /// </summary>
        /// <param name="owner">The owner control.</param>
        public ItemContainerGenerator(Control owner)
            : base(owner)
        {
        }

        /// <inheritdoc/>
        protected override IControl CreateContainer(object item, IDataTemplate itemTemplate)
        {
            T result = item as T;

            if (result == null)
            {
                result = new T();
                result.Content = this.Owner.MaterializeDataTemplate(item);
            }

            return result;
        }
    }
}