using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Dongke.WinForm.Controls
{
    /// <summary>
    /// 标准多选按钮
    /// </summary>
    [ToolboxBitmap(typeof(CheckBox))]
    public class ChkCheckBox : CheckBox, IDKControl, IAsyncControl
    {
        #region 构造函数
        /// <summary>
        /// 标准单选按钮
        /// </summary>
        public ChkCheckBox()
        {
            base.AutoSize = true;
            this.BackColor = Color.Transparent;
        }
        #endregion

        #region 重写属性
        /// <summary>
        /// 获取或设置一个值，该值指示是否自动调整控件的大小以完整显示其内容
        /// </summary>
        [DefaultValue(true)]
        public override bool AutoSize
        {
            get
            {
                return base.AutoSize;
            }
            set
            {
                base.AutoSize = value;
            }
        }

        /// <summary>
        /// 获取或设置控件的背景色
        /// </summary>
        [DefaultValue(typeof(Color), "Transparent")]
        public override Color BackColor
        {
            get
            {
                return base.BackColor;
            }
            set
            {
                base.BackColor = value;
            }
        }
        #endregion

        #region IAsyncControl 成员
        #region 成员变量
        /// <summary>
        /// 异步处理开始时，控件状态
        /// </summary>
        private bool _asyncBeginStatus = false;
        private bool _asyncBeginFocused = false;
        #endregion

        #region 公有方法
        /// <summary>
        /// 开始异步处理
        /// </summary>
        /// <param name="doFocus">是否处理焦点</param>
        public virtual void BeginAsync(ref bool doFocus)
        {
            this._asyncBeginFocused = false;
            if (doFocus && this.Focused)
            {
                this._asyncBeginFocused = true;
                doFocus = false;
            }
            this._asyncBeginStatus = this.Enabled;
            this.Enabled = false;
        }

        /// <summary>
        /// 结束异步处理
        /// </summary>
        public virtual void EndAsync()
        {
            this.Enabled = this._asyncBeginStatus;
            if (this._asyncBeginFocused)
            {
                this.Focus();
            }
        }
        #endregion
        #endregion
    }
}