todo stage1

MySolution/ToDoApp/SubControl/PlaceholderTextBox.xaml.cs

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+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 ToDoApp.SubControl
+{
+    /// <summary>
+    /// PlaceholderTextBox.xaml에 대한 상호 작용 논리
+    /// </summary>
+    public partial class PlaceholderTextBox : UserControl
+    {
+        public string TPlaceholder { get; set; } = "";
+        public int TFontSize { get; set; } = 12;
+        public FontWeight TFontWeight { get; set; } = FontWeights.Normal;
+        public int THeight { get; set; } = 20;
+        public VerticalAlignment TVerticalAlignment { get; set; } = VerticalAlignment.Center;
+
+        public PlaceholderTextBox()
+        {
+            InitializeComponent();
+
+            this.DataContext = this;
+        }
+
+        public string Text
+        {
+            get { return tbxMain.Text; }
+            set { tbxMain.Text = value; }
+        }
+
+        private void tbxMain_GotFocus(object sender, RoutedEventArgs e)
+        {
+            TextBox textBox = sender as TextBox;
+            if (textBox == null)
+                return;
+
+            if (textBox.Text != this.TPlaceholder)
+                return;
+
+            textBox.Text = "";
+            textBox.Foreground = Brushes.Black;
+        }
+
+        private void tbxMain_LostFocus(object sender, RoutedEventArgs e)
+        {
+            TextBox textBox = sender as TextBox;
+            if (textBox == null)
+                return;
+
+            if (!string.IsNullOrEmpty(textBox.Text))
+                return;
+
+            textBox.Text = this.TPlaceholder;
+            textBox.Foreground = Brushes.Gray;
+        }
+    }
+}