private void OnActivated(object sender, EventArgs e)
{
var windows = SystemWindow.FilterToplevelWindows(new Predicate <SystemWindow>(IsAppWindow));
Array.Sort(windows, (wnd1, wnd2) => wnd1.Title.CompareTo(wnd2.Title));
//
// If an item was already selected in the list, try to find it in the new list and
// select it.
//
var selectedWindow = WindowList.SelectedItem as SystemWindow;
m_Windows.Clear();
m_Windows.AddRange(windows);
WindowList.Items.Refresh();
CollectionViewSource.GetDefaultView(WindowList.ItemsSource).Refresh();
//
// If the previously selected window is not found in the new list, simply select
// the first element.
//
int selectIndex = 0;
if (selectedWindow != null)
{
for (int i = 0; i < WindowList.Items.Count; ++i)
{
SystemWindow wnd = WindowList.Items[i] as SystemWindow;
if (wnd.HWnd == selectedWindow.HWnd)
{
selectIndex = i;
break;
}
}
}
if (!WindowList.Items.IsEmpty)
{
WindowList.SelectedIndex = selectIndex;
WindowList.UpdateLayout();
(WindowList.ItemContainerGenerator.ContainerFromIndex(selectIndex) as ListViewItem).Focus();
}
FuzzySearchTitle.Focus();
}