// ***********************************************************************
// Assembly         : Construction
// Author           : flythink
// Created          : 07-02-2020
//
// Last Modified By : flythink
// Last Modified On : 09-01-2020
// ***********************************************************************
// <copyright file="XPaintHelper.cs" company="jindongfang">
// Copyright (c) jindongfang. All rights reserved.
// </copyright>
// <summary></summary>
// ***********************************************************************

namespace WellWorkDataUI
{
    using DevExpress.Utils.Drawing;
    using DevExpress.Utils.Paint;
    using System;

    /// <summary>
    /// using自动切换XPaint
    /// </summary>
    public class XPaintHelper : IDisposable
    {
        private static ObjectPool<XPaintHelper> pool = new ObjectPool<XPaintHelper>(() => new XPaintHelper());

        private GraphicsCache cache;

        private XPaint newItem;

        private XPaint oldItem;

        private XPaintHelper()
        {
        }

        /// <summary>
        /// Switches the specified cache.
        /// </summary>
        /// <param name="cache">The cache.</param>
        /// <param name="paint">The paint.</param>
        /// <returns>XPaintHelper.</returns>
        public static XPaintHelper Switch(GraphicsCache cache, XPaint paint)
        {
            XPaintHelper item = pool.Get();

            item.cache = cache;
            item.oldItem = cache.Paint;
            item.newItem = paint;

            cache.Paint = paint;

            return item;
        }

        /// <summary>
        /// Provides <see cref="T:Microsoft.Win32.RegistryKey" /> objects that represent the root keys in the Windows registry, and <see langword="static" /> methods to access key/value pairs.
        /// </summary>
        public void Dispose()
        {
            this.cache.Paint = this.oldItem;

            pool.Return(this);
        }
    }
}