/// <summary>
/// Select the focusable date
/// </summary>
private void SelectFocusableDate()
{
if (MonthView == null)
{
return;
}
//If SelectedDateTime isn't null, select it; if not, select the first focusable date
FXMonthViewItem focusableItem = null;
if (SelectedDateTime.HasValue)
{
focusableItem = MonthView.GetContainerFromDate(SelectedDateTime.Value);
}
else
{
DateTime firstDayOfMonth = new DateTime(MonthView.ViewDateTime.Year, MonthView.ViewDateTime.Month, 1);
for (int i = 0; i < DateTime.DaysInMonth(firstDayOfMonth.Year, firstDayOfMonth.Month); ++i)
{
focusableItem = MonthView.GetContainerFromDate(firstDayOfMonth);
if (IsFocusable(focusableItem))
{
break;
}
firstDayOfMonth = firstDayOfMonth.AddDays(1);
}
}
if (focusableItem != null)
{
focusableItem.IsSelected = true;
focusableItem.Focus();
}
}
private static void OnIsDropDownOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FXDatePicker datepicker = (FXDatePicker)d;
if ((bool)e.NewValue)
{
//Remember the previous SelectedDateTime for cancel action (Key.Escape)
datepicker.prevValue = datepicker.SelectedDateTime;
//If SelectedDateTime != MCC.SelectedDate, set SelectedDate = SelectedDateTime
if (datepicker.MonthView != null && datepicker.SelectedDateTime != datepicker.MonthView.SelectedDateTime)
{
datepicker.MonthView.SelectedDateTime = datepicker.SelectedDateTime;
}
// When the drop down opens, take capture
Mouse.Capture(datepicker, CaptureMode.SubTree);
// Popup.IsOpen is databound to IsDropDownOpen. We don't know
// if IsDropDownOpen will be invalidated before Popup.IsOpen.
// If we are invalidated first and we try to focus the item, we
// might succeed. When the popup finally opens, Focus
// will be sent to null because Core doesn't know what else to do.
// So, we must focus the element only after we are sure the popup
// has opened. We will queue an operation (at Send priority) to
// do this work -- this is the soonest we can make this happen.
if (datepicker.MonthView != null && datepicker.SelectedDateTime.HasValue)
{
datepicker.Dispatcher.BeginInvoke(DispatcherPriority.Send, (DispatcherOperationCallback) delegate(object arg)
{
FXDatePicker dp = (FXDatePicker)arg;
if (dp.IsKeyboardFocusWithin)
{
FXMonthViewItem item = dp.MonthView.GetContainerFromDate(dp.SelectedDateTime.Value);
if (item != null)
{
item.Focus();
}
}
return(null);
}, datepicker);
}
datepicker.OnDropDownOpened(new RoutedEventArgs(DropDownOpenedEvent));
}
else
{
// If focus is within the subtree, make sure we have the focus so that focus isn't in the disposed hwnd
if (datepicker.IsKeyboardFocusWithin)
{
// If use Mouse to select a date, DateSelectionChanged is fired in ListBox.MakeSingleSelection
// Then ListBoxItem.Focus() will be called which will grab the focus from FXDatePicker
// So use Dispatcher.BeginInvoke to set Focus to FXDatePicker after ListBoxItem.Focus()
datepicker.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, (DispatcherOperationCallback) delegate(object arg)
{
FXDatePicker dp = (FXDatePicker)arg;
if (dp.IsKeyboardFocusWithin)
{
dp.Focus();
}
return(null);
}, datepicker);
if (datepicker.HasCapture)
{
// It's not editable, make sure the datepicker has focus
datepicker.Focus();
}
}
if (datepicker.HasCapture)
{
Mouse.Capture(null);
}
datepicker.OnDropDownClosed(new RoutedEventArgs(DropDownClosedEvent));
}
}