sourcegit/src/Views/Widgets/Welcome.xaml

<UserControl x:Class="SourceGit.Views.Widgets.Welcome"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:controls="clr-namespace:SourceGit.Views.Controls"
             xmlns:widgets="clr-namespace:SourceGit.Views.Widgets"
             mc:Ignorable="d" 
             d:DesignHeight="800" d:DesignWidth="800">
    <Grid Background="Transparent" AllowDrop="True" DragEnter="OnPageDragEnter" DragLeave="OnPageDragLeave" Drop="OnPageDrop">
        <Grid Width="420">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>
            
            <StackPanel Grid.Row="0" Orientation="Vertical" Width="420" HorizontalAlignment="Center" TextElement.FontFamily="Consolas">
                <!-- Logo -->
                <Path 
                    Margin="0,48,0,0" 
                    Width="100" Height="100" 
                    Data="{StaticResource Icon.Git}" 
                    Fill="{StaticResource Brush.Logo}"/>

                <!-- Welcome -->
                <TextBlock
                    Margin="0,16"
                    HorizontalAlignment="Center" 
                    Text="{StaticResource Text.Welcome.Title}"
                    FontSize="28"
                    FontWeight="ExtraBold"
                    Foreground="{StaticResource Brush.FG2}"/>

                <!-- Options -->
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="8"/>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>

                    <Button Grid.Column="0" Click="OnOpenClicked" Height="28">
                        <StackPanel Orientation="Horizontal">
                            <Path Width="16" Height="16" Data="{StaticResource Icon.Folder.Open}"/>
                            <TextBlock Margin="12,0,0,0" Text="{StaticResource Text.Welcome.OpenOrInit}"/>
                        </StackPanel>
                    </Button>

                    <Button Grid.Column="2" Click="OnCloneClicked" Height="28">
                        <StackPanel Orientation="Horizontal">
                            <Path Width="16" Height="16" Data="{StaticResource Icon.Pull}"/>
                            <TextBlock Margin="12,0,0,0" Text="{StaticResource Text.Welcome.Clone}"/>
                        </StackPanel>
                    </Button>
                </Grid>

                <!-- Horizontal line -->
                <Rectangle Height="1" Margin="0,36,0,8" Fill="{StaticResource Brush.Border1}"/>

                <!-- Labels -->
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>

                    <TextBlock 
                        Grid.Column="0" 
                        Text="{StaticResource Text.Welcome.Repositories}" 
                        FontSize="18" FontWeight="ExtraBold" 
                        Foreground="{StaticResource Brush.FG2}"/>
                    
                    <TextBlock 
                        Grid.Column="2" 
                        Text="{StaticResource Text.Welcome.DragDrop}" 
                        FontSize="14" 
                        Foreground="{StaticResource Brush.FG2}"/>
                </Grid>
            </StackPanel>
            
            <!-- Drop Area -->
            <Rectangle
                Grid.Row="1"
                x:Name="dropArea"
                Margin="0,2"
                Stroke="{StaticResource Brush.Border1}"
                StrokeThickness="2"
                StrokeDashArray="4,4"
                SnapsToDevicePixels="True"
                Visibility="Hidden"/>
            
            <!-- Tree -->
            <controls:Tree
                Grid.Row="1"
                x:Name="tree"
                Margin="2,4"
                AllowDrop="True"
                TextElement.FontSize="14"
                ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                ScrollViewer.VerticalScrollBarVisibility="Auto"
                ContextMenuOpening="OnTreeContextMenuOpening"
                MouseMove="OnTreeMouseMove"
                DragOver="OnTreeDragOver"
                Drop="OnTreeDrop">
                <controls:Tree.ItemContainerStyle>
                    <Style TargetType="{x:Type controls:TreeItem}" BasedOn="{StaticResource Style.TreeItem}">
                        <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}"/>

                        <EventSetter Event="Expanded" Handler="OnTreeNodeStatusChange"/>
                        <EventSetter Event="Collapsed" Handler="OnTreeNodeStatusChange"/>
                        <EventSetter Event="MouseDoubleClick" Handler="OnTreeNodeDoubleClick"/>
                    </Style>
                </controls:Tree.ItemContainerStyle>
                
                <controls:Tree.ItemTemplate>
                    <HierarchicalDataTemplate ItemsSource="{Binding Children}">
                        <Border Height="32">
                            <Grid IsHitTestVisible="False">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="Auto"/>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="22"/>
                                </Grid.ColumnDefinitions>

                                <Path Grid.Column="0" Margin="2,0,0,0" x:Name="Icon" Width="16" Height="16" Data="{StaticResource Icon.Git}"/>

                                <StackPanel Grid.Column="1" x:Name="Contents" Orientation="Horizontal">
                                    <TextBlock Margin="8,0" Text="{Binding Name}"/>
                                    <TextBlock x:Name="Path" Text="{Binding Id}" Foreground="{StaticResource Brush.FG2}"/>
                                </StackPanel>

                                <controls:TextEdit 
                                    Grid.Column="1" 
                                    x:Name="Editor" 
                                    Height="20"
                                    Margin="4,0,0,0"
                                    Text="{Binding Name}"
                                    FontSize="12"
                                    Loaded="RenameStart"
                                    KeyDown="RenameKeyDown"
                                    LostFocus="RenameEnd"
                                    IsHitTestVisible="True"
                                    Visibility="Collapsed"/>

                                <controls:Bookmark
                                    Grid.Column="2"
                                    Width="14" Height="14"
                                    Color="{Binding Bookmark}"
                                    IsNewPage="False"
                                    HideOnZero="True"/>
                            </Grid>
                        </Border>

                        <HierarchicalDataTemplate.Triggers>
                            <DataTrigger Binding="{Binding IsGroup}" Value="True">
                                <Setter TargetName="Path" Property="Visibility" Value="Collapsed"/>
                            </DataTrigger>
                            <MultiDataTrigger>
                                <MultiDataTrigger.Conditions>
                                    <Condition Binding="{Binding IsGroup}" Value="True"/>
                                    <Condition Binding="{Binding IsExpanded}" Value="False"/>
                                </MultiDataTrigger.Conditions>
                                <Setter TargetName="Icon" Property="Data" Value="{StaticResource Icon.Folder.Fill}"/>
                            </MultiDataTrigger>
                            <MultiDataTrigger>
                                <MultiDataTrigger.Conditions>
                                    <Condition Binding="{Binding IsGroup}" Value="True"/>
                                    <Condition Binding="{Binding IsExpanded}" Value="True"/>
                                </MultiDataTrigger.Conditions>
                                <Setter TargetName="Icon" Property="Data" Value="{StaticResource Icon.Folder.Open}"/>
                            </MultiDataTrigger>
                            <DataTrigger Binding="{Binding IsEditing}" Value="True">
                                <Setter TargetName="Editor" Property="Visibility" Value="Visible"/>
                                <Setter TargetName="Contents" Property="Visibility" Value="Collapsed"/>
                            </DataTrigger>
                        </HierarchicalDataTemplate.Triggers>
                    </HierarchicalDataTemplate>
                </controls:Tree.ItemTemplate>
            </controls:Tree>
        </Grid>

        <!-- Popup -->
        <widgets:PopupPanel x:Name="popup"/>
    </Grid>
</UserControl>