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

namespace Dongke.WinForm.Controls
{
    /// <summary>
    /// 标准按钮控件
    /// </summary>
    [ToolboxBitmap(typeof(Button))]
    public class BtnButton : Button, IDKControl, IAsyncControl
    {
        #region 成员变量
        /// <summary>
        /// 焦点是否进入控件
        /// </summary>
        private bool _entered = false;
        /// <summary>
        /// 鼠标是否进入控件
        /// </summary>
        private bool _mouseOver = false;
        #endregion

        #region 构造函数
        /// <summary>
        /// 标准按钮控件
        /// </summary>
        public BtnButton()
        {
            this.Size = new Size(85, 30);
        }
        #endregion

        #region 属性
        /// <summary>
        /// 获取一个值，该值指示控件是否有输入焦点。
        /// </summary>
        [DefaultValue(false)]
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [EditorBrowsable(EditorBrowsableState.Advanced)]
        public virtual bool Entered
        {
            get
            {
                return this._entered;
            }
            protected set
            {
                this._entered = value;
            }
        }

        /// <summary>
        /// 获取一个值，该值指示鼠标是否在控件上方。
        /// </summary>
        [DefaultValue(false)]
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [EditorBrowsable(EditorBrowsableState.Advanced)]
        public virtual bool MouseOver
        {
            get
            {
                return this._mouseOver;
            }
            protected set
            {
                this._mouseOver = value;
            }
        }
        #endregion

        #region 重写属性
        /// <summary>
        /// 获取或设置控件的前景色
        /// </summary>
        [DefaultValue(typeof(Color), "White")]
        public override Color ForeColor
        {
            get
            {
                return Color.White;
            }
            //set
            //{
            //}
        }

        /// <summary>
        /// 获取或设置控件的前景色
        /// </summary>
        //[DefaultValue(typeof(Resources), "button_00_back")]
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [EditorBrowsable(EditorBrowsableState.Never)]
        public override Image BackgroundImage
        {
            get
            {
                if (!this.Enabled)
                {
                    return Properties.Resources.Button_Disable_00;
                }
                if (this._mouseOver)
                {
                    return Properties.Resources.Button_Enter_00;
                }
                return Properties.Resources.Button_Back_00;
            }
            //set
            //{
            //}
        }
        #endregion

        #region 重写事件
        #region 焦点事件
        /// <summary>
        /// 输入焦点进入控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnEnter(EventArgs e)
        {
            this.Entered = true;
            base.OnEnter(e);
        }

        /// <summary>
        /// 获得焦点
        /// </summary>
        /// <param name="e"></param>
        protected override void OnGotFocus(EventArgs e)
        {
            base.OnGotFocus(e);
        }

        /// <summary>
        /// 失去焦点
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus(e);
        }

        /// <summary>
        /// 输入焦点离开控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLeave(EventArgs e)
        {
            base.OnLeave(e);
            //this.Entered = false;
        }

        /// <summary>
        /// 验证事件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnValidating(CancelEventArgs e)
        {
            base.OnValidating(e);
            if (!e.Cancel)
            {
                this.Entered = false;
            }
        }
        #endregion

        #region 鼠标事件
        /// <summary>
        /// 鼠标进入控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseEnter(EventArgs e)
        {
            this.MouseOver = true;
            base.OnMouseEnter(e);
        }

        /// <summary>
        /// 鼠标离开控件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            this.MouseOver = false;
        }

        /// <summary>
        /// 鼠标移动
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
        }

        /// <summary>
        /// 鼠标按下
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
        }

        /// <summary>
        /// 鼠标抬起
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
        }
        #endregion
        #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
    }
}