private static void PopupCalendarLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
if (_popupCalControl != null &&
!(e.NewFocus is CalendarDayButton) &&
!(e.NewFocus is CalendarButton))
{
_popupCalControl.IsOpen = false;
_popupCalControl = null;
}
}
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 FrameworkElementLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
var frameworkElement = sender as FrameworkElement;
if (frameworkElement != null)
{
if (_popupCalControl != null &&
!(e.NewFocus is CalendarDayButton) &&
!(e.NewFocus is CalendarButton))
{
// 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 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));
}
}