MARKUS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace KCOM.Controls

{

    /// <summary>

    /// UseLInesTextBox.xaml에 대한 상호 작용 논리

    /// </summary>

    public partial class ExtendTextBox : UserControl

    {

        public ExtendTextBox()

        {

            InitializeComponent();

        }

        private string tempString;

        public bool IsExtend

        {

            get { return (bool)GetValue(IsExtendProperty); }

            set { SetValue(IsExtendProperty, value); }

        }

        public static readonly DependencyProperty IsExtendProperty =

               DependencyProperty.RegisterAttached("IsExtend", typeof(bool), typeof(ExtendTextBox), new PropertyMetadata(false, IsExtendPropertyChanged));

        private static void IsExtendPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            var owner = d as ExtendTextBox;

            owner.SetTextBox();

        }

        public string Text

        {

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

            set { SetValue(TextProperty, value); }

        }

        public static readonly DependencyProperty TextProperty =

               DependencyProperty.RegisterAttached("Text", typeof(string), typeof(ExtendTextBox), new PropertyMetadata(null, TextPropertyChanged));

        private static void TextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            var owner = d as ExtendTextBox;

            owner.tempString = (string)e.NewValue;

            owner.SetTextBox();

        }

        private void SetTextBox()

        {

            if (!IsExtend)

            {

                btExtend.Content = "+";

                txtBox.Text = tempString?.Split(System.Environment.NewLine.ToCharArray()).First();

            }

            else

            {

                btExtend.Content = "-";

                txtBox.Text = tempString;

            }

        }

        public override void OnApplyTemplate()

        {

            base.OnApplyTemplate();

        }

        private void Button_Click(object sender, RoutedEventArgs e)

        {

            IsExtend = !IsExtend;

        }

    }

}