From f1ba693f75fca70e7f41db83dff9074bc91e71fe Mon Sep 17 00:00:00 2001
From: Andreas Stenlund <a.stenlund@gmail.com>
Date: Mon, 19 Oct 2020 18:13:05 +0200
Subject: [PATCH] Update IP address on both PropertyChanged and LostFocus

---
 Behaviors/UpdateSourceOnLostFocusBehavior.cs | 32 ++++++++++++++++++++
 MainWindow.xaml                              |  7 +++--
 2 files changed, 36 insertions(+), 3 deletions(-)
 create mode 100644 Behaviors/UpdateSourceOnLostFocusBehavior.cs

diff --git a/Behaviors/UpdateSourceOnLostFocusBehavior.cs b/Behaviors/UpdateSourceOnLostFocusBehavior.cs
new file mode 100644
index 0000000..efd66b6
--- /dev/null
+++ b/Behaviors/UpdateSourceOnLostFocusBehavior.cs
@@ -0,0 +1,32 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using Microsoft.Xaml.Behaviors;
+
+namespace fs2ff.Behaviors
+{
+    public class UpdateSourceOnLostFocusBehavior : Behavior<TextBox>
+    {
+        protected override void OnAttached()
+        {
+            base.OnAttached();
+
+            if (AssociatedObject != null)
+                AssociatedObject.LostFocus += AssociatedObject_LostFocus;
+        }
+
+        protected override void OnDetaching()
+        {
+            if (AssociatedObject != null)
+                AssociatedObject.LostFocus -= AssociatedObject_LostFocus;
+
+            base.OnDetaching();
+        }
+
+        private static void AssociatedObject_LostFocus(object sender, RoutedEventArgs e)
+        {
+            if (sender is TextBox textBox)
+                BindingOperations.GetBindingExpression(textBox, TextBox.TextProperty)?.UpdateSource();
+        }
+    }
+}
diff --git a/MainWindow.xaml b/MainWindow.xaml
index 798e79f..7243944 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:ui="http://schemas.modernwpf.com/2019"
         xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
-        xmlns:behaviors="clr-namespace:fs2ff.Behaviors"
+        xmlns:b="clr-namespace:fs2ff.Behaviors"
         xmlns:c="clr-namespace:fs2ff.Converters"
         ui:WindowHelper.UseModernWindowStyle="True"
         mc:Ignorable="d"
@@ -86,12 +86,13 @@
                     Text="{
                         Binding IpAddress, Mode=TwoWay,
                         Converter={c:IpAddressToStringConverter},
-                        UpdateSourceTrigger=LostFocus}"
+                        UpdateSourceTrigger=PropertyChanged, Delay=5000}"
                     Template="{StaticResource WatermarkTextBoxTemplate}"
                     Tag="255.255.255.255"
                     Margin="0,10,0,0">
                     <i:Interaction.Behaviors>
-                        <behaviors:MoveFocusOnEnterBehavior />
+                        <b:MoveFocusOnEnterBehavior />
+                        <b:UpdateSourceOnLostFocusBehavior />
                     </i:Interaction.Behaviors>
                 </TextBox>
                 <Label