C#

// Updates to the App class
public partial class App : Application
{
  private bool _active;

  public bool Active { get { return _active; } }
  private void Application_Activated(object sender, EventArgs e)
  {
    _active = true;
  }
  private void Application_Deactivated(object sender, EventArgs e)
  {
    _active = false;
  }
}

// Popup event handler
public void PopupBase_MouseDown(object sender, EventArgs e)
{
  App currentApp = Application.Current as App;
  if (currentApp != null)
  {
    if (!currentApp.Active)
    {
      _owner.Activate();
    }
  }
}

// This was set to trigger on the Popup.Child's Loaded event
public void PopupChild_Loaded(object sender, EventArgs e)
{
  AddActivationHandler(this.Child.Child);  // Child is Border and the border's child is a Grid
}
private void AddActivationHandler(UIElement element)
{
  if (element is Panel)
  {
    Panel pElement = element as Panel;
    foreach (UIElement child in pElement.Children) // Recursively iterate through all children and children of children
    {
      AddActivationHandler(child);
    }
  }

  element.MouseDown += PopupBase_MouseDown;
{

double totalDistance = 7.3
double speed = 1;
double progress = (speed / totalDistance);
double step = progress / 10;

    while (progress <= totalDistance)
    {
        progress += step;

        //Calling a function that updates between 0.0 and 1
        Dispatcher.Invoke(new Action(() => {
            SetProgress(0.1);
        }));
    }