/*******************************************************************************
 * Copyright(c) 2014 DongkeSoft All rights reserved. / Confidential
 * 类的信息：
 *      1.程序名称：C_TextBox.cs
 *      2.功能描述：扩展的文本框控件：便于修改背景颜色及字体、颜色
 * 编辑履历：
 *      作者            日期                版本            修改内容
 *      陈晓野          2014/08/13          1.00            新建
 *******************************************************************************/

using System;
using System.ComponentModel;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace Dongke.IBOSS.PRD.Basics.BaseControls
{
    /// <summary>
    /// 扩展的文本框控件
    /// </summary>
    public partial class DKTextBoxBase : DKTextBox
    {
        #region 成员变量

        private string _rejectCharsPattern;
        private string _fixCharsPattern;
        private int _minLength = 0;
        private string _errorMessage;
        private string _fixPatternMessage;
        private string _textValue = null;
        private string _textFormat = null;
        private bool _textNullable = false;
        private bool _allowCharsPattern = true;

        #endregion

        #region 属性

        /// <summary>
        /// 获取或设置限制输入的字符
        /// </summary>
        [Description("获取或设置限制输入的字符"), Category("CustomerEx")]
        [DefaultValue((string)null)]
		protected virtual string RejectChars
        {
            get
            {
                return this._rejectCharsPattern;
            }
            set
            {
                if (!this._allowCharsPattern)
                {
                    return;
                }
                if (this._rejectCharsPattern != value)
                {
                    this._rejectCharsPattern = value;
                    this.SetText(this.Text);
                }
            }
        }

        /// <summary>
        /// 获取或设置允许输入的字符
        /// </summary>
        [Description("获取或设置允许输入的字符"), Category("CustomerEx")]
        [DefaultValue((string)null)]
		protected virtual string FixChars
        {
            get
            {
                return this._fixCharsPattern;
            }
            set
            {
                if (!this._allowCharsPattern)
                {
                    return;
                }
                if (this._fixCharsPattern != value)
                {
                    this._fixCharsPattern = value;
                    this.SetText(this.Text);
                }
            }
        }

        /// <summary>
        /// 获取或设置允许输入的最小长度
        /// </summary>
        [Description("获取或设置允许输入的最小长度"), Category("CustomerEx")]
        [DefaultValue(0)]
        public int MinLength
        {
            get
            {
                return this._minLength;
            }
            set
            {
                if (this._minLength != value)
                {
                    this._minLength = value;
                    this.SetText(this.Text);
                }
            }
        }

        /// <summary>
        /// 获取校验未通过时的错误消息
        /// </summary>
        [Description("获取校验未通过时的错误消息"), Category("CustomerEx")]
        [DefaultValue((string)null)]
		public string ErrorMessage
        {
            get
            {
                return this._errorMessage;
            }
            set
            {
                this._errorMessage = value;
            }
        }

        /// <summary>
        /// 获取或设置文本格式的要求信息
        /// </summary>
        [Description("获取或设置文本格式的要求信息"), Category("CustomerEx")]
        [DefaultValue((string)null)]
        protected virtual string FixPatternMessage
        {
            get
            {
                return this._fixPatternMessage;
            }
            set
            {
                if (!this._allowCharsPattern)
                {
                    return;
                }
                this._fixPatternMessage = value;
            }
        }

        /// <summary>
        /// 获取或设置文本格式化信息
        /// </summary>
        [Description("获取或设置文本格式化信息"), Category("CustomerEx")]
        [DefaultValue((string)null)]
        public virtual string TextFormat
        {
            get
            {
                return this._textFormat;
            }
            set
            {
                if (this._textFormat == value)
                {
                    this._textFormat = value;
                    this.SetText(this.Text);
                }
            }
        }

        /// <summary>
        /// 获取通过校验的文本
        /// </summary>
        [Description("获取通过校验的文本"), Category("CustomerEx")]
        [DefaultValue((string)null)]
        public virtual string TextValue
        {
            get
            {
                return this._textValue;
            }
            set
            {
                this._textValue = value;
            }
        }

        /// <summary>
        /// 获取或设置文本是否可以为空(无效)
        /// </summary>
        [Description("获取或设置文本是否可以为空(无效)"), Category("CustomerEx")]
        [DefaultValue(false)]
        public virtual bool TextNullable
        {
            get
            {
                return this._textNullable;
            }
            set
            {
                this._textNullable = value;
            }
        }

        ///// <summary>
        ///// 获取或设置文本
        ///// </summary>
        //public new string Text
        //{
        //    get
        //    {
        //        return base.Text;
        //    }
        //    set
        //    {
        //        if (base.Text != value)
        //        {
        //            this.SetText(value);
        //        }
        //    }
        //}

        protected virtual bool ContinueWndProc
        {
            get;
            set;
        }

        protected virtual bool IsSetText
        {
            get;
            set;
        }

        protected virtual bool AllowCharsPattern
        {
            get
            {
                return this._allowCharsPattern;
            }
            set
            {
                this._allowCharsPattern = value;
            }
        }

        #endregion

        #region 构造函数

        /// <summary>
        /// 构造函数
        /// </summary>
		public DKTextBoxBase()
        {
            InitializeComponent();
            base.Text = string.Empty;
            this.ContinueWndProc = false;
        }

        #endregion

        #region 受保护的方法/函数

        /// <summary>
        /// 限制输入文本
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        protected virtual string RejectChar(string text)
        {
            if (string.IsNullOrEmpty(text) || string.IsNullOrEmpty(this._rejectCharsPattern))
            {
                return text;
            }

            return Regex.Replace(text, this._rejectCharsPattern, string.Empty);
        }

        /// <summary>
        /// 校验输入文本
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        protected virtual bool CheckText(string text)
        {
            if (string.IsNullOrEmpty(text))
            {
                if (this.IsMustInput)
                {
                    this.HasError = true;
                    this.ErrorMessage = "必须输入项目";
                    return false;
                }

                this.HasError = false;
                this.ErrorMessage = string.Empty;
                return true;
            }

            if (0 < this._minLength && text.Length < this._minLength)
            {
                this.HasError = true;
                this.ErrorMessage = "文本小于最小长度" + this.MinLength;
                return false;
            }

            if (!string.IsNullOrEmpty(this._fixCharsPattern))
            {
                if (!Regex.IsMatch(text, this._fixCharsPattern))
                {
                    this.HasError = true;
                    this.ErrorMessage = this._fixPatternMessage;
                    return false;
                }
            }

            this.HasError = false;
            this.ErrorMessage = string.Empty;
            return true;
        }

        /// <summary>
        /// 设置文本
        /// </summary>
        /// <param name="text"></param>
        protected virtual bool SetText(string text)
        {
            this._textValue = null;
			text = this.RejectChar(text);
            if (this.CheckText(text))
            {
                if (!string.IsNullOrEmpty(this._textFormat) && !string.IsNullOrEmpty(text))
                {
                    text = string.Format("{0:" + this._textFormat + "}", text);
                }
                this._textValue = text;
            }

            if (base.Text != text)
            {
                this.IsSetText = true;
                base.Text = text;
                return true;
            }
            return true;
        }

        /// <summary>
        /// 限制文本长度
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        protected string LimitLength(string input)
        {
            if (this.MaxLength <= 0 || string.IsNullOrEmpty(input))
            {
                return input;
            }
            int textCount = this.Text.Length;
            int inputCount = input.Length;
            int selectedTextCount = 0;
            if (!string.IsNullOrEmpty(this.Text))
            {
                selectedTextCount = this.SelectionLength;
            }

            // 可以输入的文本长度
            int remainCount = this.MaxLength - (textCount - selectedTextCount);

            if (remainCount <= 0)
            {
                return null;
            }

            if (inputCount <= remainCount)
            {
                return input;
            }
            else
            {
                return input.Substring(0, remainCount);
            }
        }

        /// <summary>
        /// </remarks>
        /// <param name="message"></param>
        protected override void WndProc(ref Message message)
        {
            const int WM_CHAR = 0x0102;
            const int WM_PASTE = 0x0302;

            if (message.Msg == WM_CHAR)
            {
                KeyPressEventArgs eKeyPress =
                    new KeyPressEventArgs((Char)(message.WParam.ToInt32()));
                this.OnChar(eKeyPress);

                if (eKeyPress.Handled)
                {
                    if (!this.ContinueWndProc)
                    {
                        return;
                    }
                }
            }
            else if (message.Msg == WM_PASTE)
            {
                this.OnPaste(EventArgs.Empty);
                if (!this.ContinueWndProc)
                {
                    return;
                }
            }

            base.WndProc(ref message);
        }

        #endregion

        #region 事件

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected virtual void OnChar(KeyPressEventArgs e)
        {
            if (this.Enabled == false || this.ReadOnly || char.IsControl(e.KeyChar))
            {
                return;
            }

            string text = e.KeyChar.ToString();

			this.SelectedText = this.LimitLength(this.RejectChar(text));

            e.Handled = true;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected virtual void OnPaste(EventArgs e)
        {
            if (this.Enabled == false || this.ReadOnly)
            {
                return;
            }
            object clipboardText =
                Clipboard.GetDataObject().GetData(System.Windows.Forms.DataFormats.UnicodeText);
            if (clipboardText == null)
            {
                clipboardText =
                    Clipboard.GetDataObject().GetData(System.Windows.Forms.DataFormats.Text);
                if (clipboardText == null)
                {
                    return;
                }
            }
            string text = clipboardText.ToString();

			this.SelectedText = this.LimitLength(this.RejectChar(text));
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected virtual void VerifyText()
        {
            this.SetText(this.Text);
        }

        protected override void OnLeave(EventArgs e)
        {
            //this.VerifyText();
            base.OnLeave(e);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected override void OnValidating(CancelEventArgs e)
        {
            //this.VerifyText();
            base.OnValidating(e);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected override void OnTextChanged(EventArgs e)
        {
            if (!this.IsSetText)
            {
                if (this.SetText(this.Text))
                {
                    base.OnTextChanged(e);
                }
            }
            else
            {
                base.OnTextChanged(e);
            }
            this.IsSetText = false;
        }

        #endregion
    }
}