fix: fix #53.

demo/Ursa.Demo/Pages/IPv4BoxDemo.axaml

@@ -4,14 +4,13 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-    xmlns:pages="clr-namespace:Ursa.Demo.Pages"
     xmlns:u="https://irihi.tech/ursa"
+    xmlns:vm="clr-namespace:Ursa.Demo.ViewModels;assembly=Ursa.Demo"
+    x:DataType="vm:IPv4BoxDemoViewModel"
+    x:CompileBindings="True"
     d:DesignHeight="450"
     d:DesignWidth="800"
     mc:Ignorable="d">
-    <Design.DataContext>
-        <pages:IPv4DemoViewMode />
-    </Design.DataContext>
     <StackPanel HorizontalAlignment="Left">
         <ToggleButton
             Name="format"
@@ -38,6 +37,6 @@
             IPAddress="{Binding Address}"
             ShowLeadingZero="{Binding #format.IsChecked}" />
         <TextBlock Classes="" Text="Disabled" />
-        <u:IPv4Box Width="200" IsEnabled="False" />
+        <u:IPv4Box Width="200" IsEnabled="False" IPAddress="{Binding Address}" />
     </StackPanel>
 </UserControl>

demo/Ursa.Demo/Pages/IPv4BoxDemo.axaml.cs

@@ -12,18 +12,5 @@ public partial class IPv4BoxDemo : UserControl
     public IPv4BoxDemo()
     {
         InitializeComponent();
-        DataContext = new IPv4DemoViewMode();
-    }
-}
-
-public partial class IPv4DemoViewMode: ObservableObject
-{
-    [ObservableProperty]
-    private IPAddress? _address;
-
-    public void ChangeAddress()
-    {
-        long l = Random.Shared.NextInt64(0x00000000FFFFFFFF);
-        Address = new IPAddress(l);
     }
 }

demo/Ursa.Demo/Pages/ImageViewerDemo.axaml

@@ -13,6 +13,10 @@
         <SolidColorBrush x:Key="MaskBorder" Color="Red" />
     </UserControl.Resources>
     <StackPanel>
+        <u:Banner
+            Content="Setting the Scale before loading has no effect."
+            Header="Notice"
+            Type="Warning" />
         <u:ImageViewer
             Name="viewer"
             Width="600"

demo/Ursa.Demo/ViewModels/IPv4BoxDemoViewModel.cs

@@ -1,6 +1,20 @@
+using System;
+using System.Net;
+using CommunityToolkit.Mvvm.ComponentModel;
+
 namespace Ursa.Demo.ViewModels;
 
-public class IPv4BoxDemoViewModel: ViewModelBase
+public partial class IPv4BoxDemoViewModel: ObservableObject
 {
+    [ObservableProperty] private IPAddress? _address;
     
+    public IPv4BoxDemoViewModel()
+    {
+        Address = IPAddress.Parse("192.168.1.1");
+    }
+    public void ChangeAddress()
+    {
+        long l = Random.Shared.NextInt64(0x00000000FFFFFFFF);
+        Address = new IPAddress(l);
+    }
 }

src/Ursa.Themes.Semi/Controls/IPv4Box.axaml

@@ -121,7 +121,8 @@
             <Setter Property="Border.BorderBrush" Value="{DynamicResource IPv4BoxFocusBorderBrush}" />
         </Style>
         <Style Selector="^:disabled">
-            <Setter Property="Border.Background" Value="{DynamicResource IPv4BoxDisabledBackground}" />
+            <Setter Property="Background" Value="{DynamicResource IPv4BoxDisabledBackground}" />
+            <Setter Property="Foreground" Value="{DynamicResource SemiColorDisabledText}" />
         </Style>
     </ControlTheme>
 </ResourceDictionary>

src/Ursa/Controls/IPv4Box.cs

@@ -115,6 +115,19 @@ public class IPv4Box: TemplatedControl
         _presenters[1] = _secondText;
         _presenters[2] = _thirdText;
         _presenters[3] = _fourthText;
+        if (this.IPAddress != null)
+        {
+            var sections = IPAddress.ToString().Split('.');
+            for (int i = 0; i < 4; i++)
+            {
+                var presenter = _presenters[i];
+                if (presenter != null)
+                {
+                    presenter.Text = sections[i];
+                }
+            }
+            ParseBytes(ShowLeadingZero);
+        }
     }
     
     protected override void OnKeyDown(KeyEventArgs e)

src/Ursa/Controls/ImageViewer/ImageViewer.cs

@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
 using Avalonia.Input;
+using Avalonia.Interactivity;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
 
@@ -149,6 +150,7 @@ public class ImageViewer: TemplatedControl
 
     private void OnSourceChanged(AvaloniaPropertyChangedEventArgs args)
     {
+        if(!IsLoaded) return;
         IImage image = args.GetNewValue<IImage>();
         Size size = image.Size;
         double width = this.Bounds.Width;
@@ -184,7 +186,16 @@ public class ImageViewer: TemplatedControl
         base.OnApplyTemplate(e);
         _image = e.NameScope.Get<Image>(PART_Image);
         _layer = e.NameScope.Get<VisualLayerManager>(PART_Layer);
-        if (Source is { } i)
+        if (Overlayer is { } c)
+        {
+            AdornerLayer.SetAdorner(this, c);
+        }
+    }
+
+    protected override void OnLoaded(RoutedEventArgs e)
+    {
+        base.OnLoaded(e);
+        if (Source is { } i && _image is { })    
         {
             Size size = i.Size;
             double width = Bounds.Width;
@@ -193,14 +204,9 @@ public class ImageViewer: TemplatedControl
             _image.Height = size.Height;
             Scale = GetScaleRatio(width/size.Width, height/size.Height, this.Stretch);
         }
-        if (Overlayer is { } c)
-        {
-            AdornerLayer.SetAdorner(this, c);
-        }
     }
 
 
-
     protected override void OnPointerWheelChanged(PointerWheelEventArgs e)
     {
         base.OnPointerWheelChanged(e);