StabilityMatrix/StabilityMatrix.Avalonia/Views/PackageManagerPage.axaml

<controls:UserControlBase 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:viewModels="clr-namespace:StabilityMatrix.Avalonia.ViewModels"
                          xmlns:mocks="clr-namespace:StabilityMatrix.Avalonia.DesignData;assembly=StabilityMatrix.Avalonia"
                          xmlns:ui="clr-namespace:FluentAvalonia.UI.Controls;assembly=FluentAvalonia"
                          xmlns:models="clr-namespace:StabilityMatrix.Core.Models;assembly=StabilityMatrix.Core"
                          xmlns:controls="clr-namespace:StabilityMatrix.Avalonia.Controls"
                          mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                          x:DataType="viewModels:PackageManagerViewModel"
                          x:CompileBindings="True"
                          d:DataContext="{x:Static mocks:DesignData.PackageManagerViewModel}"
                          x:Class="StabilityMatrix.Avalonia.Views.PackageManagerPage">

    <Grid Margin="16" RowDefinitions="Auto,*">
        <StackPanel
            Grid.Row="0"
            Orientation="Vertical"
            IsVisible="{Binding ProgressBarVisibility, FallbackValue=True}">

            <ProgressBar
                IsIndeterminate="{Binding IsIndeterminate, FallbackValue=False}"
                Maximum="100"
                Value="{Binding ProgressValue, FallbackValue=10}"
                Width="500" />
            <TextBlock
                HorizontalAlignment="Center"
                Padding="8"
                Text="{Binding ProgressText, FallbackValue=Installing...}" />
        </StackPanel>

        <StackPanel
            Grid.Row="1"
            HorizontalAlignment="Left"
            Margin="16"
            Orientation="Horizontal">
            <StackPanel Orientation="Vertical">
                <Button
                    Command="{Binding ShowInstallDialogCommand}"
                    Height="40"
                    HorizontalAlignment="Stretch"
                    Margin="0,0,0,16"
                    Classes="success"
                    VerticalContentAlignment="Center">
                    <StackPanel Orientation="Horizontal">
                        <ui:SymbolIcon Symbol="Add" />
                        <Label
                            Content="Add Package"
                            Margin="8,0,0,0"
                            VerticalContentAlignment="Center" />
                    </StackPanel>
                </Button>

                <ListBox
                    ItemsSource="{Binding Packages}"
                    SelectedItem="{Binding SelectedPackage, Mode=TwoWay}"
                    IsVisible="{Binding !!Packages.Count}">

                    <ListBox.Template>
                        <ControlTemplate>
                            <Border
                                BorderBrush="#FFCCCCCC"
                                BorderThickness="1"
                                CornerRadius="5">
                                <ItemsPresenter />
                            </Border>
                        </ControlTemplate>
                    </ListBox.Template>

                    <ListBox.ItemTemplate>
                        <DataTemplate DataType="{x:Type models:InstalledPackage}">
                            <StackPanel Margin="8" VerticalAlignment="Top">
                                <TextBlock Margin="0,5,0,5" Text="{Binding DisplayName}" />
                                <TextBlock Margin="0,0,0,5" Text="{Binding DisplayVersion}" />
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>

            <StackPanel Margin="32,0,0,0" Orientation="Vertical">
                <TextBlock
                    FontSize="24"
                    FontWeight="Bold"
                    Text="{Binding SelectedPackage.DisplayName,
                    FallbackValue='Click &quot;Add Package&quot; to install a package'}" />
                <TextBlock FontSize="12" Margin="0,5,0,5">
                    <Run Text="{Binding SelectedPackage.PackageName, FallbackValue=''}" />
                    <Run Text="{Binding SelectedPackage.DisplayVersion, FallbackValue=''}" />
                </TextBlock>
                <TextBlock
                    FontSize="12"
                    Margin="0,5,0,5"
                    Text="{Binding SelectedPackage.FullPath, FallbackValue=''}" />
                <StackPanel Margin="0,16,0,0" Orientation="Horizontal" Spacing="16">
                    <Button
                        Command="{Binding Launch}"
                        Content="{Binding InstallButtonText}"
                        Height="50"
                        VerticalAlignment="Top"
                        IsEnabled="{Binding InstallButtonEnabled}"
                        IsVisible="{Binding InstallButtonEnabled}"
                        Classes="success"
                        Width="100" />
                    <Button
                        Command="{Binding Uninstall}"
                        Content="Uninstall"
                        Height="50"
                        VerticalAlignment="Top"
                        Classes="danger"
                        IsEnabled="{Binding !IsUninstalling}"
                        IsVisible="{Binding InstallButtonEnabled}"
                        Width="100" />
                </StackPanel>
                <StackPanel Orientation="Horizontal" IsVisible="{Binding IsUninstalling}">
                    <controls:ProgressRing Height="24" Width="24"
                                           Margin="8, 16, 8, 8"
                                           VerticalAlignment="Center"
                                           BorderThickness="4"
                                           IsIndeterminate="True" HorizontalAlignment="Left" />
                    <TextBlock Text="Uninstalling..." VerticalAlignment="Center" Margin="0,8,0,0" />
                </StackPanel>
            </StackPanel>
        </StackPanel>
    </Grid>
</controls:UserControlBase>