Add window icon, make the title bar draggable and drop the full-screen caption button

Use the Starter icon for the window and the executable; the whole caption strip drags the window. Extending the client area makes Avalonia 12 add an extra full-screen toggle to the window chrome (which lives in its own host, so it is not reachable from the window's visual tree); it is hidden globally in App.axaml via its WindowDecorationProperties.ElementRole. Standard minimize / maximize / close are kept.

StarterNG/App.axaml

@@ -1,6 +1,7 @@
 <Application xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:materialIcons="clr-namespace:Material.Icons.Avalonia;assembly=Material.Icons.Avalonia"
+             xmlns:chrome="clr-namespace:Avalonia.Controls.Chrome;assembly=Avalonia.Controls"
              x:Class="StarterNG.App"
              x:CompileBindings="True"
              RequestedThemeVariant="Dark">
@@ -10,6 +11,15 @@
                  <FluentTheme />
                  <materialIcons:MaterialIconStyles />
                  <StyleInclude Source="avares://Starter/Styles/Carbon.axaml" />
+
+                 <!-- Extending the client area (MainWindow) makes Avalonia 12 draw an extra
+                      full-screen toggle in the window chrome. The chrome lives in its own host
+                      (not the window's visual tree), so it is hidden here, globally, by the
+                      decoration role Avalonia tags it with. Standard minimise / maximise /
+                      close are left untouched. -->
+                 <Style Selector="Button[(chrome|WindowDecorationProperties.ElementRole)=FullScreenButton]">
+                     <Setter Property="IsVisible" Value="False" />
+                 </Style>
              </Application.Styles>
              <Application.Resources>
                  <PathGeometry x:Key="DiscordLogo" Figures="M 81.15 0 c -1.2376 2.1973 -2.3489 4.4704 -3.3591 6.794 c -9.5975 -1.4396 -19.3718 -1.4396 -28.9945 0 c -0.985 -2.3236 -2.1216 -4.5967 -3.3591 -6.794 c -9.0166 1.5407 -17.8059 4.2431 -26.1405 8.0568 C 2.779 32.5304 -1.6914 56.3725 0.5312 79.8863 c 9.6732 7.1476 20.5083 12.603 32.0505 16.0884 c 2.6014 -3.4854 4.8998 -7.1981 6.8698 -11.0623 c -3.738 -1.3891 -7.3497 -3.1318 -10.8098 -5.1523 c 0.9092 -0.6567 1.7932 -1.3386 2.6519 -1.9953 c 20.281 9.547 43.7696 9.547 64.0758 0 c 0.8587 0.7072 1.7427 1.3891 2.6519 1.9953 c -3.4601 2.0457 -7.0718 3.7632 -10.835 5.1776 c 1.97 3.8642 4.2683 7.5769 6.8698 11.0623 c 11.5419 -3.4854 22.3769 -8.9156 32.0509 -16.0631 c 2.626 -27.2771 -4.496 -50.9172 -18.817 -71.8548 C 98.9811 4.2684 90.1918 1.5659 81.1752 0.0505 l -0.0252 -0.0505 Z M 42.2802 65.4144 c -6.2383 0 -11.4159 -5.6575 -11.4159 -12.6535 s 4.9755 -12.6788 11.3907 -12.6788 s 11.5169 5.708 11.4159 12.6788 c -0.101 6.9708 -5.026 12.6535 -11.3907 12.6535 Z M 84.3576 65.4144 c -6.2637 0 -11.3907 -5.6575 -11.3907 -12.6535 s 4.9755 -12.6788 11.3907 -12.6788 s 11.4917 5.708 11.3906 12.6788 c -0.101 6.9708 -5.026 12.6535 -11.3906 12.6535 Z" FillRule="NonZero"/>

StarterNG/MainWindow.axaml

@@ -9,11 +9,14 @@
     xmlns:views="clr-namespace:StarterNG.Views"
     xmlns:starterNg="clr-namespace:StarterNG"
     Title="Starter MaSzyna"
+    Icon="/Assets/starter.ico"
     Width="1200" Height="768" MinWidth="1200" MinHeight="666"
     WindowStartupLocation="CenterScreen">
     <!-- The client area is extended over the title bar in code-behind (the
          ExtendClientArea* hints), so the logo + nav sit on the top bar while the
-         OS minimise / maximise / close buttons stay in the top-right corner. -->
+         standard minimise / maximise / close buttons stay in the top-right corner.
+         Extending the client area also makes Avalonia 12 add an extra full-screen caption
+         button; it is hidden in App.axaml via its WindowDecorationProperties.ElementRole. -->
 
     <DockPanel LastChildFill="True">
 
@@ -27,27 +30,24 @@
                 BorderThickness="0,0,0,1">
             <Grid RowDefinitions="32,48">
 
-                <!-- Row 0: title / caption strip. Transparent background makes the
-                     whole strip a drag handle (PointerPressed -> BeginMoveDrag),
-                     and the OS buttons render at its top-right. The log button sits
-                     on top of the strip, just left of the OS min/max/close buttons. -->
-                <StackPanel Orientation="Horizontal" Spacing="16" Grid.Row="0">
-                    <Border Background="Transparent"
-                            PointerPressed="TitleBar_OnPointerPressed">
-                        <TextBlock Text="Starter MaSzyna" VerticalAlignment="Center"
-                                   Margin="14,0,0,0" FontSize="11"
-                                   Foreground="{StaticResource CarbonFgDim}" />
-                    </Border>
+                <!-- Row 0: title / caption strip. The transparent background spans the
+                     whole strip so PointerPressed -> BeginMoveDrag drags the window from
+                     anywhere on it (the log button and the OS caption buttons handle their
+                     own clicks). The OS min/max/close buttons render at its top-right, so
+                     ~140px is reserved on the right for them. -->
+                <Grid Grid.Row="0" Background="Transparent"
+                      PointerPressed="TitleBar_OnPointerPressed"
+                      ColumnDefinitions="*,Auto">
+                    <TextBlock Grid.Column="0" Text="Starter MaSzyna" VerticalAlignment="Center"
+                               Margin="14,0,0,0" FontSize="11"
+                               Foreground="{StaticResource CarbonFgDim}" />
 
-                    <!-- Reserve ~140px on the right for the OS caption buttons so the
-                         log button lands immediately to their left. -->
-                    <Button Classes="Basic" Click="openLastLogClick"
-                            HorizontalAlignment="Left" VerticalAlignment="Stretch"
-                            Margin="0,0,0,0" Padding="10,0" Cursor="Hand"
+                    <Button Grid.Column="1" Classes="Basic" Click="openLastLogClick"
+                            VerticalAlignment="Stretch" Margin="0,0,140,0" Padding="10,0" Cursor="Hand"
                             ToolTip.Tip="{Binding [ShowLatestLogTooltip], Source={x:Static starterNg:App.Loc}}">
                         <materialIcons:MaterialIcon Kind="FileDocument" Height="16" Width="16" />
                     </Button>
-                </StackPanel>
+                </Grid>
 
                 <!-- Row 1: logo + navigation (left) and the right cluster (right) -->
                 <Grid Grid.Row="1" ColumnDefinitions="Auto,Auto,*,Auto">

StarterNG/StarterNG.csproj

@@ -8,6 +8,7 @@
         <Nullable>enable</Nullable>
         <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
         <ApplicationManifest>app.manifest</ApplicationManifest>
+        <ApplicationIcon>Assets\starter.ico</ApplicationIcon>
         <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
         <AssemblyVersion>1.2.0.4</AssemblyVersion>
         <FileVersion>1.2.0.4</FileVersion>
@@ -48,6 +49,8 @@
       <AvaloniaResource Include="Assets\Logo\*.png" />
       <None Remove="Assets\Test\ep07p.bmp" />
       <AvaloniaResource Include="Assets\Test\ep07p.bmp" />
+      <None Remove="Assets\starter.ico" />
+      <AvaloniaResource Include="Assets\starter.ico" />
     </ItemGroup>
 
     <ItemGroup>