private static void FrameworkElementGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
var frameworkElement = sender as FrameworkElement;
if (frameworkElement != null)
{
if (_popupCalControl == null)
{
_popupCalControl = new CalandarPopupControl();
_popupCalControl.AddHandler(UIElement.LostKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(PopupCalendarLostKeyboardFocus));
}
_popupCalControl.TargetTextBox = GetTargetTextBox(frameworkElement);
_popupCalControl.IsOpen = true;
}
}
private static void OnPlacementTargetChanged(DependencyObject element, DependencyPropertyChangedEventArgs e)
{
var frameworkElement = element as FrameworkElement;
if (_popupCalControl == null)
{
_popupCalControl = new CalandarPopupControl();
_popupCalControl.AddHandler(UIElement.LostKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(PopupCalendarLostKeyboardFocus));
}
if (frameworkElement != null &&
_popupCalControl != null)
{
_popupCalControl.TargetTextBox = GetTargetTextBox(frameworkElement);
frameworkElement.AddHandler(UIElement.GotKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(FrameworkElementGotKeyboardFocus),
true);
frameworkElement.AddHandler(UIElement.LostKeyboardFocusEvent,
new KeyboardFocusChangedEventHandler(FrameworkElementLostKeyboardFocus));
}
}