CommandElement.cs

using System.Windows.Input;
 
namespace NeuroAccessMaui.UI.Core
{
    internal static class CommandElement
    {
        public static void OnCommandChanging(BindableObject bo, object o, object _)
        {
            ICommandElement CommandElement = (ICommandElement)bo;
 
            if (o is ICommand OldCommand)
                OldCommand.CanExecuteChanged -= CommandElement.CanExecuteChanged;
        }
 
        public static void OnCommandChanged(BindableObject bo, object _, object n)
        {
            ICommandElement CommandElement = (ICommandElement)bo;
 
            if (n is ICommand NewCommand)
                NewCommand.CanExecuteChanged += CommandElement.CanExecuteChanged;
 
            CommandElement.CanExecuteChanged(bo, EventArgs.Empty);
        }
 
        public static void OnCommandParameterChanged(BindableObject bo, object _, object __)
        {
            ICommandElement CommandElement = (ICommandElement)bo;
 
            CommandElement.CanExecuteChanged(bo, EventArgs.Empty);
        }
 
        public static bool GetCanExecute(ICommandElement CommandElement)
        {
            if (CommandElement.Command == null)
                return true;
 
            return CommandElement.Command.CanExecute(CommandElement.CommandParameter);
        }
    }
}