sourcegit/src/Views/Welcome.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:c="using:SourceGit.Converters"
             xmlns:vm="using:SourceGit.ViewModels"
             xmlns:v="using:SourceGit.Views"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="SourceGit.Views.Welcome"
             x:DataType="vm:Welcome">
  <Grid RowDefinitions="*,36">
    <Grid Grid.Row="0" Margin="0,8" ColumnDefinitions="*,600,*">
      <Grid Grid.Column="1" RowDefinitions="Auto,*">
        <!-- Search Box -->
        <TextBox Grid.Row="0"
                 x:Name="SearchBox"
                 Height="32"
                 Padding="0"
                 CornerRadius="16"
                 BorderBrush="{DynamicResource Brush.Border0}"
                 BorderThickness="1"
                 Background="{DynamicResource Brush.Contents}"
                 Watermark="{DynamicResource Text.Welcome.Search}"
                 VerticalContentAlignment="Center"
                 Text="{Binding SearchFilter, Mode=TwoWay}"
                 v:AutoFocusBehaviour.IsEnabled="True">
          <TextBox.Styles>
            <Style Selector="TextBox:pointerover /template/ Border#PART_BorderElement">
              <Setter Property="BorderBrush" Value="{DynamicResource Brush.Border0}"/>
            </Style>
            <Style Selector="TextBox:focus /template/ Border#PART_BorderElement">
              <Setter Property="BorderBrush" Value="{DynamicResource Brush.Border0}"/>
            </Style>
          </TextBox.Styles>
          
          <TextBox.InnerLeftContent>
            <Path Width="16" Height="16" Margin="6,0,3,0" Data="{StaticResource Icons.Search}" Fill="{DynamicResource Brush.FG2}"/>
          </TextBox.InnerLeftContent>

          <TextBox.InnerRightContent>
            <Button Classes="icon_button" IsVisible="{Binding SearchFilter, Converter={x:Static StringConverters.IsNotNullOrEmpty}}" Command="{Binding ClearSearchFilter}">
              <Path Width="16" Height="16" Margin="0,0,0,0" Data="{StaticResource Icons.Clear}" Fill="{DynamicResource Brush.FG1}"/>
            </Button>
          </TextBox.InnerRightContent>
        </TextBox>

        <!-- Repository Tree -->
        <ListBox Grid.Row="1"
                 x:Name="TreeContainer"
                 Margin="0,8,8,0"
                 Focusable="True"
                 Background="Transparent"
                 ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                 ScrollViewer.VerticalScrollBarVisibility="Auto"
                 ItemsSource="{Binding Rows}"
                 SelectionMode="Single"
                 Loaded="SetupTreeViewDragAndDrop"
                 LostFocus="OnTreeViewLostFocus"
                 KeyDown="OnTreeViewKeyDown">
          <ListBox.Styles>
            <Style Selector="ListBox">
              <Setter Property="FocusAdorner">
                <FocusAdornerTemplate>
                  <Border Background="Transparent" BorderThickness="0"/>
                </FocusAdornerTemplate>
              </Setter>
            </Style>
            
            <Style Selector="ListBoxItem" x:DataType="vm:RepositoryNode">
              <Setter Property="Margin" Value="0"/>
              <Setter Property="Padding" Value="0"/>
              <Setter Property="Height" Value="30"/>
              <Setter Property="CornerRadius" Value="4"/>
              <Setter Property="FocusAdorner">
                <FocusAdornerTemplate>
                  <Border Background="Transparent" BorderThickness="0"/>
                </FocusAdornerTemplate>
              </Setter>
            </Style>
          </ListBox.Styles>

          <ListBox.ItemsPanel>
            <ItemsPanelTemplate>
              <VirtualizingStackPanel Orientation="Vertical"/>
            </ItemsPanelTemplate>
          </ListBox.ItemsPanel>

          <ListBox.ContextMenu>
            <ContextMenu>
              <MenuItem Header="{DynamicResource Text.Welcome.AddRootFolder}" Command="{Binding AddRootNode}">
                <MenuItem.Icon>
                  <Path Width="12" Height="12" Data="{DynamicResource Icons.Folder.Add}"/>
                </MenuItem.Icon>
              </MenuItem>
            </ContextMenu>
          </ListBox.ContextMenu>

          <ListBox.ItemTemplate>
            <DataTemplate DataType="vm:RepositoryNode">
              <Grid Background="Transparent"
                    Height="30"
                    ColumnDefinitions="16,18,Auto,*"
                    Margin="{Binding Depth, Converter={x:Static c:IntConverters.ToTreeMargin}}"
                    Loaded="SetupTreeNodeDragAndDrop"
                    ContextRequested="OnTreeNodeContextRequested"
                    PointerPressed="OnPointerPressedTreeNode"
                    PointerMoved="OnPointerMovedOverTreeNode"
                    PointerReleased="OnPointerReleasedOnTreeNode"
                    DoubleTapped="OnDoubleTappedTreeNode"
                    ClipToBounds="True">
                <v:RepositoryTreeNodeToggleButton Grid.Column="0"
                                                  Classes="tree_expander"
                                                  Focusable="False"
                                                  HorizontalAlignment="Center"
                                                  IsChecked="{Binding IsExpanded, Mode=OneWay}"
                                                  IsVisible="{Binding !IsRepository}"/>
                
                <Path Grid.Column="1"
                      Width="14" Height="14"
                      Fill="{Binding Bookmark, Converter={x:Static c:BookmarkConverters.ToBrush}}"
                      HorizontalAlignment="Center"
                      Data="{StaticResource Icons.Bookmark}"
                      IsVisible="{Binding IsRepository}"/>

                <ToggleButton Grid.Column="1"
                              Classes="folder"
                              Focusable="False"
                              Width="14" Height="14"
                              HorizontalAlignment="Left"
                              Foreground="{DynamicResource Brush.FG1}"
                              IsChecked="{Binding IsExpanded}"
                              IsVisible="{Binding !IsRepository}"/>

                <TextBlock Grid.Column="2" 
                           Classes="primary" 
                           VerticalAlignment="Center" 
                           Text="{Binding Name}"/>
                <TextBlock Grid.Column="3"
                           Classes="primary"
                           Margin="8,0"
                           HorizontalAlignment="Right" VerticalAlignment="Center"
                           Foreground="{DynamicResource Brush.FG2}"
                           Text="{Binding Id}"
                           IsVisible="{Binding IsRepository}"/>
              </Grid>
            </DataTemplate>
          </ListBox.ItemTemplate>
        </ListBox>
      </Grid>
    </Grid>

    <!-- Tips -->
    <TextBlock Grid.Row="1"
               Classes="italic"
               Margin="0,0,8,0"
               HorizontalAlignment="Center" VerticalAlignment="Center"
               FontSize="{Binding Source={x:Static vm:Preference.Instance}, Path=DefaultFontSize, Converter={x:Static c:DoubleConverters.Decrease}}"
               Text="{DynamicResource Text.Welcome.DragDropTip}"
               Foreground="{DynamicResource Brush.FG2}"/>
  </Grid>
</UserControl>