/// <summary>
/// IsDropDownOpenProperty property changed handler.
/// </summary>
/// <param name="d">DatePicker that changed its IsDropDownOpen.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnIsDropDownOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DatePicker datePicker = d as DatePicker;
Debug.Assert(datePicker != null);
bool newValue = (bool)e.NewValue;
bool oldValue = (bool)e.OldValue;
if (datePicker._popUp != null && datePicker._popUp.Child != null)
{
if (newValue != oldValue)
{
if (datePicker._calendar.DisplayMode != CalendarMode.Month)
{
datePicker._calendar.DisplayMode = CalendarMode.Month;
}
if (newValue)
{
datePicker.OpenDropDown();
}
else
{
Debug.Assert(!newValue);
datePicker._popUp.IsOpen = false;
datePicker.OnCalendarClosed(new RoutedEventArgs());
}
}
}
}
