inabox/InABox.Avalonia/Dialogs/TextDialog/TextDialogView.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Layout;
using Avalonia.Markup.Xaml;
using InABox.Avalonia.Converters;

namespace InABox.Avalonia.Dialogs;

internal class TextDialogVerticalAlignmentConverter : AbstractConverter<bool, VerticalAlignment>
{
    protected override VerticalAlignment Convert(bool value, object? parameter = null)
    {
        return value ? VerticalAlignment.Top : VerticalAlignment.Center;
    }
}

public partial class TextDialogView : UserControl
{
    private TextDialogViewModel Model => (DataContext as TextDialogViewModel)!;

    public TextDialogView()
    {
        InitializeComponent();

        TextBox.AttachedToVisualTree += TextBox_AttachedToVisualTree;
    }

    private void TextBox_AttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
    {
        TextBox.Focus();
    }

    protected override Size MeasureOverride(Size availableSize)
    {
        var baseSize = base.MeasureOverride(availableSize);
        if (Model.Multiline)
        {
            return new(
                Double.IsPositiveInfinity(availableSize.Width) ? baseSize.Width : availableSize.Width,
                Double.IsPositiveInfinity(availableSize.Height) ? baseSize.Height : availableSize.Height);
        }
        return baseSize.WithWidth(
            Double.IsPositiveInfinity(availableSize.Width) ? baseSize.Width : availableSize.Width);
        
    }
}