IMEX.mes.wcf/DK.Basics/BaseControls/Base/DKComboBox.cs

/*******************************************************************************
 * Copyright(c) 2014 DongkeSoft All rights reserved. / Confidential
 * 类的信息：
 *      1.程序名称：DKComboBox.cs
 *      2.功能描述：扩展的组合框控件：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.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Dongke.IBOSS.PRD.Basics.BaseControls
{
    /// <summary>
    /// 扩展的组合框控件
    /// </summary>
    public abstract partial class DKComboBox : ComboBox, IDKControl
    {
        #region 成员变量

        /// <summary>
        /// 控件是否是必须输入项目
        /// </summary>
        private bool _mustInput = false;

        /// <summary>
        /// 背景色
        /// </summary>
        private Color _backgroundColor;

        /// <summary>
        /// 校验是否有错误
        /// </summary>
        private bool _hasError = false;

        /// <summary>
        /// 异步处理开始时，控件状态
        /// </summary>
        private bool _beginAsyncStatus;

        #endregion

        #region 构造函数

        /// <summary>
        /// 构造函数
        /// </summary>
        public DKComboBox()
        {
            InitializeComponent();
            this.Font = ControlsConst.FONT_SYSTEM_DEFAULT;
            this._backgroundColor = base.BackColor;
            this.BackColorChanged += DKTextBox_BackColorChanged;
            this.TextChanged += DKTextBox_TextChanged;
        }

        #endregion

        #region 属性

        /// <summary>
        /// 获取或设置控件是否是必须输入项目
        /// </summary>
        [Description("获取或设置控件是否是必须输入项目。"), Category("CustomerEx")]
        [DefaultValue(false)]
        public bool IsMustInput
        {
            get
            {
                return this._mustInput;
            }
            set
            {
                if (_mustInput != value)
                {
                    this._mustInput = value;
                    this.SetBackColor();
                }
            }
        }

        /// <summary>
        /// 获取或设置控件校验时是否有错误
        /// </summary>
        [Description("获取或设置控件校验时是否有错误。"), Category("CustomerEx")]
        [DefaultValue(false)]
        public bool HasError
        {
            get
            {
                return this._hasError;
            }
            set
            {
                if (_hasError != value)
                {
                    this._hasError = value;
                    this.SetBackColor();
                }
            }
        }

        /// <summary>
        /// 获取或设置控件的背景色
        /// </summary>
        [Description("获取或设置控件的背景色。"), Category("CustomerEx")]
        public Color BackgroundColor
        {
            get
            {
                return this._backgroundColor;
            }
            set
            {
                if (this._backgroundColor != value)
                {
                    this._backgroundColor = value;
                    this.SetBackColor();
                }
            }
        }

        #endregion

        #region 事件处理

        /// <summary>
        /// 文本改变时改变背景色
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DKTextBox_TextChanged(object sender, System.EventArgs e)
        {
            this.SetBackColor();
        }

        /// <summary>
        /// 背景色改变时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DKTextBox_BackColorChanged(object sender, System.EventArgs e)
        {
            this.SetBackColor();
        }

        #endregion

        #region 公有方法

        /// <summary>
        /// 异步处理开始
        /// </summary>
        public void BeginAsync()
        {
            this._beginAsyncStatus = this.Enabled;
            this.Enabled = false;
        }

        /// <summary>
        /// 异步处理结束
        /// </summary>
        public void EndAsync()
        {
            this.Enabled = this._beginAsyncStatus;
        }

        #endregion

        #region 私有方法

        /// <summary>
        /// 设置背景色
        /// </summary>
        private void SetBackColor()
        {
            // 项目为必须输入项时，需要修改背景颜色
            this.BackColorChanged -= DKTextBox_BackColorChanged;
            if (this._mustInput && string.IsNullOrEmpty(this.Text))
            {
                base.BackColor = ControlsConst.BACKCOLOR_TEXT_MUSTINPUT_EMPT;
            }
            else if (this._hasError)
            {
                base.BackColor = ControlsConst.BACKCOLOR_TEXT_ERROR;
            }
            else
            {
                base.BackColor = this._backgroundColor;
            }
            this.BackColorChanged -= DKTextBox_BackColorChanged;
        }

        #endregion
    }
}