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

namespace Dongke.WinForm.Controls
{
    /// <summary>
    /// 标识单选按钮
    /// </summary>
    [ToolboxBitmap(typeof(CheckBox))]
    public partial class ChkFlagCheckBox : UserControl, IDKControl, IMustInput, IAsyncControl
    {
        #region 成员变量
        /// <summary>
        /// 自动调整大小
        /// </summary>
        private bool _autoSize = true;
        /// <summary>
        /// 自动调整大小时的固定大小
        /// </summary>
        private Size _fixedSize = Size.Empty;
        #endregion

        #region 构造函数
        /// <summary>
        /// 标识单选按钮
        /// </summary>
        public ChkFlagCheckBox()
        {
            this.InitializeComponent();
            this.SetStyle(ControlStyles.FixedHeight, true);
            this.SetStyle(ControlStyles.FixedWidth, true);
            base.AutoSize = false;
            base.BackColor = Color.Transparent;
        }
        #endregion

        #region 属性
        /// <summary>
        /// 获取或设置标识CheckBox选中状态。
        /// </summary>
        [Description("获取或设置标识CheckBox选中状态。"), Category("CustomerEx")]
        [DefaultValue(typeof(FlagCheckBoxChecked), "None")]
        public FlagCheckBoxChecked FlagBoxChecked
        {
            get
            {
                int flag = -1;
                if (this.chkNo.Checked)
                {
                    flag += 1;
                }
                if (this.chkYes.Checked)
                {
                    flag += 2;
                }
                return (FlagCheckBoxChecked)flag;
            }
            set
            {
                switch (value)
                {
                    case FlagCheckBoxChecked.All:
                        this.chkYes.Checked = true;
                        this.chkNo.Checked = true;
                        break;
                    case FlagCheckBoxChecked.Yes:
                        this.chkYes.Checked = true;
                        this.chkNo.Checked = false;
                        break;
                    case FlagCheckBoxChecked.No:
                        this.chkYes.Checked = false;
                        this.chkNo.Checked = true;
                        break;
                    default:
                        if (this._mustInput)
                        {
                            this.chkYes.Checked = true;
                            this.chkNo.Checked = true;
                        }
                        else
                        {
                            this.chkYes.Checked = false;
                            this.chkNo.Checked = false;
                        }
                        break;
                }
            }
        }

        /// <summary>
        /// 获取或设置 Yes CheckBox 的文本。
        /// </summary>
        [Description("获取或设置 Yes CheckBox 的文本。"), Category("CustomerEx")]
        [DefaultValue("是")]
        public string TextYes
        {
            get
            {
                return this.chkYes.Text;
            }
            set
            {
                this.chkYes.Text = value;
            }
        }

        /// <summary>
        /// 获取或设置 No CheckBox 的文本。
        /// </summary>
        [Description("获取或设置 No CheckBox 的文本。"), Category("CustomerEx")]
        [DefaultValue("否")]
        public string TextNo
        {
            get
            {
                return this.chkNo.Text;
            }
            set
            {
                this.chkNo.Text = value;
            }
        }
        #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 this._autoSize;
                //return base.AutoSize;
            }
            set
            {
                if (this._autoSize != value)
                {
                    this._autoSize = value;
                    if (this._autoSize)
                    {
                        this.SetStyle(ControlStyles.FixedHeight, true);
                        this.SetStyle(ControlStyles.FixedWidth, true);
                    }
                    else
                    {
                        this.SetStyle(ControlStyles.FixedHeight, false);
                        this.SetStyle(ControlStyles.FixedWidth, false);
                    }
                    //base.AutoSize = value;
                    this.AdjustSize();
                }
            }
        }

        /// <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 重写事件
        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected override void OnResize(System.EventArgs e)
        {
            base.OnResize(e);
            this.AdjustSize();
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected override void OnSizeChanged(System.EventArgs e)
        {
            base.OnSizeChanged(e);
            this.AdjustSize();
        }
        #endregion

        #region 事件处理
        /// <summary>
        /// 显示文本改变，导致控件大小改变
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chkYes_SizeChanged(object sender, EventArgs e)
        {
            this.AdjustSize();
        }

        /// <summary>
        /// 显示文本改变，导致控件大小改变
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chkNo_SizeChanged(object sender, EventArgs e)
        {
            this.AdjustSize();
        }

        /// <summary>
        /// 选中状态改变
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chkYes_CheckedChanged(object sender, EventArgs e)
        {
            if (this._mustInput &&
                !this.chkYes.Checked &&
                !this.chkNo.Checked)
            {
                this.chkYes.Checked = true;
            }
        }

        /// <summary>
        /// 选中状态改变
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chkNo_CheckedChanged(object sender, EventArgs e)
        {
            if (this._mustInput &&
                !this.chkYes.Checked &&
                !this.chkNo.Checked)
            {
                this.chkNo.Checked = true;
            }
        }
        #endregion

        #region 私有方法
        /// <summary>
        /// 调整控件尺寸大小
        /// </summary>
        private void AdjustSize()
        {
            this.chkYes.Location = new Point(0, 0);
            this.chkNo.Location = new Point(this.chkYes.Right, 0);
            if (!this._autoSize)
            {
                return;
            }

            this._fixedSize = new Size(this.chkNo.Right, this.chkNo.Bottom);

            this.Size = this._fixedSize;
        }
        #endregion

        #region IMustInput 成员
        #region 成员变量
        /// <summary>
        /// 获取或设置控件是否是必须输入项目
        /// </summary>
        private bool _mustInput = false;
        /// <summary>
        /// 是否显示必须输入项目的提示
        /// </summary>
        private bool _showMustInputAlert = true;
        #endregion

        #region 属性
        /// <summary>
        /// 获取或设置控件是否必须选中项目。
        /// </summary>
        [Description("获取或设置控件是否必须选中项目。"), Category("IMustInput")]
        [DefaultValue(false)]
        public bool MustInput
        {
            get
            {
                return this._mustInput;
            }
            set
            {
                if (this._mustInput != value)
                {
                    this._mustInput = value;
                    if (value && this.FlagBoxChecked == FlagCheckBoxChecked.None)
                    {
                        this.FlagBoxChecked = FlagCheckBoxChecked.All;
                    }
                }
            }
        }

        /// <summary>
        /// 获取或设置控件是否显示必须输入项目提示
        /// </summary>
        [Description("获取或设置控件是否显示必须输入项目提示。"), Category("IMustInput")]
        [DefaultValue(true)]
        [Bindable(false)]
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [EditorBrowsable(EditorBrowsableState.Advanced)]
        public bool ShowMustInputAlert
        {
            get
            {
                return this._showMustInputAlert;
            }
            set
            {
                if (this._showMustInputAlert != value)
                {
                    this._showMustInputAlert = value;
                }
            }
        }
        #endregion

        #region 公有方法
        /// <summary>
        /// 清除输入项
        /// </summary>
        public virtual void ClearValue()
        {
            this.FlagBoxChecked = FlagCheckBoxChecked.None;
        }
        #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;
        private Control _activeControl = null;
        #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)
            if (doFocus && this.ActiveControl != null)
            {
                this._asyncBeginFocused = true;
                this._activeControl = this.ActiveControl;
                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();
                this.ActiveControl = this._activeControl;
                this._activeControl = null;
            }
        }
        #endregion
        #endregion
    }
}