SPT-AKI-Installer/SPTInstaller/Views/InstallPathSelectionView.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"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="SPTInstaller.Views.InstallPathSelectionView">
    
    <Grid RowDefinitions="10,*,Auto,*,10" ColumnDefinitions="10,*,Auto,10">
        
        <!-- Path Controls Grid -->
        <Grid Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2" 
              RowDefinitions="Auto,Auto" ColumnDefinitions="*,Auto"
              VerticalAlignment="Center"
              >
        <Label Grid.Row="0" Grid.Column="0" Content="Install Folder Path" FontSize="20"/>
        <TextBox Grid.Row="1" Grid.Column="0"
                 TextChanged="TextBox_OnTextChanged"
                 Watermark="Where we dropping?"
                 FontSize="16"
                 Text="{Binding SelectedPath}"
                 Classes.hasErrors="{Binding !ValidPath}"
                 >
            <TextBox.Styles>
                <Style Selector="TextBox.hasErrors">
                    <Setter Property="Foreground" Value="Red"/>
                </Style>
            </TextBox.Styles>
        </TextBox>
        <Button Grid.Row="1" Grid.Column="1"
                CornerRadius="20"
                Margin="10 0 0 0"
                Command="{Binding SelectFolderCommand}"
                >
            <StackPanel Orientation="Horizontal">
                <Path Data="{StaticResource OpenFolder}" Fill="{Binding $parent[Button].Foreground}"
                      VerticalAlignment="Center"/>
                <Label Content="Select Folder"/>
            </StackPanel>
        </Button>
        </Grid>
        
        <!-- Validation error text -->
        <TextBlock Grid.Row="3" Grid.Column="1" Text="{Binding ErrorMessage}"
                   TextWrapping="Wrap"
                   FontSize="16" Foreground="red" FontWeight="SemiBold"
                   IsVisible="{Binding !ValidPath}"
                   />
        
        <!-- Next button -->
        <Button Grid.Row="3" Grid.Column="2"
                MinWidth="100"
                MinHeight="30"
                FontSize="16"
                CornerRadius="20"
                FontWeight="SemiBold"
                VerticalAlignment="Bottom"
                HorizontalContentAlignment="Center"
                VerticalContentAlignment="Center"
                Classes="yellow"
                Content="Next"
                Command="{Binding NextCommand}"
                IsEnabled="{Binding ValidPath}"
                />
    </Grid>
</UserControl>