using System;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

namespace EasySL.UI.Controls

{

    public class MaskTextBox : TextBox

    {

        #region MaskText

        /// <summary>

        /// view sort style, desc arrow

        /// </summary>

        public static readonly DependencyProperty MaskTextProperty = DependencyProperty.Register("MaskText",typeof(string), typeof(MaskTextBox), new PropertyMetadata(new PropertyChangedCallback(DisplayDataPropertyCallBack)));

        public static void DisplayDataPropertyCallBack(object sender, DependencyPropertyChangedEventArgs args)

        {

        }

        public string MaskText

        {

            get { return (string)GetValue(MaskTextProperty); }

            set { SetValue(MaskTextProperty, value); }

        }

        #endregion

        public MaskTextBox()

        {

            Loaded += (sender, args) =>

            {

                if (string.IsNullOrEmpty(base.Text))

                {

                    base.Text = MaskText;

                    base.Foreground = new SolidColorBrush(Colors.Gray);

                }

            };

            base.GotFocus += (sender, args) =>

            {

                base.Foreground = new SolidColorBrush(Colors.Black);

                if (base.Text == MaskText)

                    base.Text = string.Empty;

            };

            base.LostFocus += (sender, args) =>

            {

                if (!string.IsNullOrEmpty(base.Text))

                    return;

                base.Text = MaskText;

                base.Foreground = new SolidColorBrush(Colors.Gray);

            };

        }

        public new string Text

        {

            get

            {

                if (base.Text == MaskText)

                    return string.Empty;

                else

                    return base.Text;

            }

            set { base.Text = value; }

       }

    }

}