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using MaterialDesignThemes.Wpf;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Interop;
namespace Tango.SharedUI.Controls
{
public class PopupWithKeyboardFocus: ComboBoxPopup
{
[DllImport("user32.dll")]
static extern IntPtr SetActiveWindow(IntPtr hWnd);
static PopupWithKeyboardFocus()
{
EventManager.RegisterClassHandler(
typeof(PopupWithKeyboardFocus),
Popup.PreviewGotKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(OnPreviewGotKeyboardFocus),
true);
}
private static void OnPreviewGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e)
{
var textBox = e.NewFocus as TextBoxBase;
if (textBox != null)
{
var hwndSource = PresentationSource.FromVisual(textBox) as HwndSource;
if (hwndSource != null)
{
SetActiveWindow(hwndSource.Handle);
}
}
}
}
}
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