sourcegit/src/Views/LauncherPage.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             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:m="using:SourceGit.Models"
             xmlns:v="using:SourceGit.Views"
             xmlns:vm="using:SourceGit.ViewModels"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="SourceGit.Views.LauncherPage"
             x:DataType="vm:LauncherPage">
  <Grid RowDefinitions="36,*">
    <!-- ToolBar -->
    <Border Grid.Row="0" BorderBrush="{DynamicResource Brush.Border0}" BorderThickness="0,0,0,1" Background="{DynamicResource Brush.ToolBar}">
      <ContentControl Content="{Binding Data}">
        <ContentControl.DataTemplates>
          <DataTemplate DataType="vm:Welcome">
            <v:WelcomeToolbar/>
          </DataTemplate>
          
          <DataTemplate DataType="vm:Repository">
            <v:RepositoryToolbar/>
          </DataTemplate>
        </ContentControl.DataTemplates>
      </ContentControl>
    </Border>
    
    <!-- Body -->
    <Border Grid.Row="1">
      <ContentControl Content="{Binding Data}">
        <ContentControl.DataTemplates>
          <DataTemplate DataType="vm:Welcome">
            <v:Welcome/>
          </DataTemplate>
          
          <DataTemplate DataType="vm:Repository">
            <v:Repository/>
          </DataTemplate>
        </ContentControl.DataTemplates>
      </ContentControl>
    </Border>
    
    <!-- Popup -->
    <Grid Grid.Row="1" IsVisible="{Binding Popup, Converter={x:Static ObjectConverters.IsNotNull}}" ClipToBounds="True">
      <Border Background="Transparent" PointerPressed="OnPopupCancelByClickMask"/>

      <Border Width="500" HorizontalAlignment="Center" VerticalAlignment="Top" Effect="drop-shadow(0 0 8 #8F000000)" CornerRadius="0,0,8,8" ClipToBounds="True">                
        <ContentControl Content="{Binding Popup}" Background="{DynamicResource Brush.Popup}">
          <ContentControl.DataTemplates>
            <DataTemplate DataType="vm:Popup">  
              <StackPanel Orientation="Vertical" Background="{DynamicResource Brush.Popup}">
                <!-- Popup Widget -->
                <ContentPresenter Margin="8,16,8,8"
                                  Content="{Binding View}"
                                  IsHitTestVisible="{Binding InProgress, Converter={x:Static BoolConverters.Not}}"/>

                <!-- Options -->
                <StackPanel Margin="8,4,8,8"
                            Height="32"
                            Orientation="Horizontal"
                            HorizontalAlignment="Right"
                            IsVisible="{Binding InProgress, Converter={x:Static BoolConverters.Not}}">
                  <Button Classes="flat primary"
                          Width="80"
                          Content="{DynamicResource Text.Sure}"
                          Click="OnPopupSure"
                          HotKey="Enter"/>
                  <Button Classes="flat"
                          Width="80"
                          Margin="8,0,0,0"
                          Content="{DynamicResource Text.Cancel}"
                          Click="OnPopupCancel"/>
                </StackPanel>

                <!-- Running -->
                <v:PopupRunningStatus Margin="12,8"
                                      Description="{Binding ProgressDescription}"
                                      IsVisible="{Binding InProgress}"/>
              </StackPanel>
            </DataTemplate>
          </ContentControl.DataTemplates>
        </ContentControl>
      </Border>
    </Grid>
    
    <!-- Notification -->
    <Grid Grid.Row="1" Width="360" HorizontalAlignment="Right" VerticalAlignment="Top">
      <ScrollViewer HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto">
        <ItemsControl ItemsSource="{Binding Notifications}">
          <ItemsControl.ItemTemplate>
            <DataTemplate DataType="m:Notification">
              <Border Margin="10,6" HorizontalAlignment="Stretch" VerticalAlignment="Top" Effect="drop-shadow(0 0 12 #A0000000)">
                <Border Padding="8" CornerRadius="6" Background="{DynamicResource Brush.Popup}">
                  <Grid RowDefinitions="26,Auto,32">
                    <StackPanel Grid.Row="0" Margin="8,0,0,0" Orientation="Horizontal" IsVisible="{Binding IsError}">
                      <Path Width="14" Height="14" Data="{StaticResource Icons.Error}" Fill="Red"/>
                      <TextBlock Margin="8,0,0,0" FontWeight="Bold" FontSize="14" Text="{DynamicResource Text.Launcher.Error}"/>
                    </StackPanel>
                    <StackPanel Grid.Row="0" Margin="8,0,0,0" Orientation="Horizontal" IsVisible="{Binding !IsError}">
                      <Path Width="14" Height="14" Data="{StaticResource Icons.Info}" Fill="Green"/>
                      <TextBlock Margin="8,0,0,0" FontWeight="Bold" FontSize="14" Text="{DynamicResource Text.Launcher.Info}"/>
                    </StackPanel>

                    <TextBox Grid.Row="1"
                             Classes="no_background no_border"
                             IsReadOnly="True"
                             TextWrapping="Wrap"
                             ScrollViewer.VerticalScrollBarVisibility="Auto"
                             MaxHeight="100"
                             Margin="8" Padding="0"
                             VerticalContentAlignment="Top"
                             Text="{Binding Message}"/>

                    <StackPanel Grid.Row="2" Margin="0,4,0,0" Orientation="Horizontal" HorizontalAlignment="Right">
                      <Button Classes="flat"
                              Margin="0,0,8,0"
                              Command="{Binding CopyMessage}"
                              Content="{DynamicResource Text.CopyMessage}"
                              IsVisible="{Binding IsError}"/>
                      
                      <Button Classes="flat primary"
                              Margin="0,0"
                              Content="{DynamicResource Text.Close}"
                              Click="OnDismissNotification"/>
                    </StackPanel>
                  </Grid>
                </Border>
              </Border>
            </DataTemplate>
          </ItemsControl.ItemTemplate>
        </ItemsControl>
      </ScrollViewer>
    </Grid>
  </Grid>
</UserControl>