common/Production/ProductionUiCordonel/UserControls/UcBarcodeInput.xaml.cs

using System;
using System.Windows.Input;
using System.Windows.Threading;

namespace Xylem.Common.Production.ProductionUiCordonel.UserControls
{
    /// <summary>
    /// Interaction logic for UcDialog.xaml
    /// </summary>
    public partial class UcBarcodeInput : IUserControl
    {
        public event EventHandler<String> OnBarcodeInput;

        public UcBarcodeInput()
        {
            InitializeComponent();
        }
        
        /// <summary>
        /// Clear display for retry
        /// </summary>
        public void Clear()
        {
            Dispatcher.Invoke(DispatcherPriority.Send,
                new Action(() =>
                    {
                        tbxScan.Text = "";
                    }
                ));
        }

        /// <summary>
        /// Set the focus to the text input box to enable scanner as keyboard IO
        /// </summary>
        internal void FocusMe()
        {
            Dispatcher.Invoke(DispatcherPriority.Send,
                new Action(() =>
                    {
                        tbxScan.Focus();
                    }
                ));
        }

        /// <summary>
        /// Act on input and fire event it at [Return] key delimiter of line
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void txtHiddenInput_KeyDown(Object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                OnBarcodeInput?.Invoke(sender, tbxScan.Text);
            }
        }
    }
}