EnterActionResult.cs

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using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
 
namespace Dreamine.UI.Abstractions.VirtualKeyboard;

public class EnterActionResult
{
    public ActionResult Result  { get; set; }
    public string        Message { get; set; } = string.Empty;
    public Action?       Action  { get; set; }

    public EnterActionResult(ActionResult result) => Result = result;

    public EnterActionResult(ActionResult result, string message) : this(result)
    {
        Message = message;
    }

    public bool IsAccepted() => Result is ActionResult.OK or ActionResult.DoNothing;

    public void Show(TextBox textBox)
    {
#pragma warning disable CS1587 // Doxygen documents local functions; the C# compiler does not attach XML docs to them.
        void Apply()
        {
            textBox.Text       = Message;
            textBox.Foreground = Result == ActionResult.OK ? Brushes.Black : Brushes.Red;
        }
#pragma warning restore CS1587
 
        var dispatcher = Application.Current.Dispatcher;
        if (dispatcher.CheckAccess())
            Apply();
        else
            dispatcher.BeginInvoke(Apply);
    }
}

public class OkEnterActionResult : EnterActionResult
{
    public OkEnterActionResult(string message = "") : base(ActionResult.OK, message) { }
}

public class NgEnterActionResult : EnterActionResult
{
    public NgEnterActionResult(string message = "") : base(ActionResult.NG, message) { }
}

public class DoNothingEnterActionResult : EnterActionResult
{
    public DoNothingEnterActionResult() : base(ActionResult.DoNothing) { }
}