private static void FrameworkElementGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
var frameworkElement = sender as FrameworkElement;
if (frameworkElement != null)
{
if (popupCalControl == null)
{
popupCalControl = new CalendarPopupControl();
}
popupCalControl.TargetTextBox = GetTargetTextBox(frameworkElement);
popupCalControl.IsOpen = true;
}
}
private static void FrameworkElementLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
var frameworkElement = sender as FrameworkElement;
if (frameworkElement != null)
{
if (popupCalControl != null)
{
// Retrieves the setting for the State property
SetState(frameworkElement, popupCalControl.State);
popupCalControl.IsOpen = false;
popupCalControl = null;
}
}
}
private static void OnPlacementTargetChanged(DependencyObject element, DependencyPropertyChangedEventArgs e)
{
var frameworkElement = element as FrameworkElement;
if (popupCalControl == null)
{
popupCalControl = new CalendarPopupControl();
}
if ((frameworkElement != null) && (popupCalControl != null))
{
popupCalControl.TargetTextBox = GetTargetTextBox(frameworkElement);
frameworkElement.AddHandler(UIElement.GotKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(FrameworkElementGotKeyboardFocus),
true);
frameworkElement.AddHandler(UIElement.LostKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(FrameworkElementLostKeyboardFocus),
true);
}
}
