/// <summary>
/// If we (or one of our children) are clicked, claim the focus
/// </summary>
private static void OnMouseButtonDown(object sender, MouseButtonEventArgs e)
{
FXDatePicker datepicker = (FXDatePicker)sender;
e.Handled = true;
if (Mouse.Captured == datepicker && e.OriginalSource == datepicker)
{
// When we have capture, all clicks off the popup will have the datepicker as
// the OriginalSource. So when the original source is the datepicker, that
// means the click was off the popup and we should dismiss.
datepicker.IsDropDownOpen = false;
}
else
{
// If mouse click the selected date, close the popup
FrameworkElement fe = e.OriginalSource as FrameworkElement;
if (fe != null && fe.DataContext is CalendarDay)
{
if (datepicker.SelectedDateTime.HasValue && datepicker.SelectedDateTime.Value == ((CalendarDay)fe.DataContext).Date)
{
datepicker.IsDropDownOpen = false;
}
}
}
}
private static void OnMinDateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FXDatePicker datepicker = (FXDatePicker)d;
datepicker.CoerceValue(MaxDateProperty);
datepicker.CoerceValue(SelectedDateTimeProperty);
}
private static void OnNullValueTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FXDatePicker datepicker = (FXDatePicker)d;
if (!datepicker.SelectedDateTime.HasValue)
{
datepicker.DoFormat(null);
}
}
private static object CoerceMaxDate(DependencyObject d, object value)
{
FXDatePicker datepicker = (FXDatePicker)d;
DateTime newValue = (DateTime)value;
DateTime min = datepicker.MinDate;
if (newValue < min)
{
return(min);
}
return(value);
}
/// <summary>
/// Coerce IsDropDownOpen with IsLoaded, so set IsDropDownOpen to true before UI ready can work
/// </summary>
private static object CoerceIsDropDownOpen(DependencyObject d, object value)
{
if ((bool)value)
{
FXDatePicker dp = (FXDatePicker)d;
if (!dp.IsLoaded)
{
//Defer setting IsDropDownOpen to true after Loaded event is fired to show popup window correctly
dp.Loaded += dp.OpenOnLoad;
return(false);
}
}
return(value);
}
private static void OnSelectedDateTimeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FXDatePicker datepicker = (FXDatePicker)d;
DateTime? oldValue = (DateTime?)e.OldValue;
DateTime? newValue = (DateTime?)e.NewValue;
//Invalid the IsValid and Text property when SelectedDateTime is changed
datepicker.SetValue(IsValidPropertyKey, newValue.HasValue);
datepicker.DoFormat(newValue);
if (datepicker.MonthView != null)
{
datepicker.MonthView.SelectedDateTime = newValue;
}
RoutedPropertyChangedEventArgs <DateTime?> routedArgs = new RoutedPropertyChangedEventArgs <DateTime?>(oldValue, newValue, SelectedDateTimeChangedEvent);
datepicker.OnSelectedDateTimeChanged(routedArgs);
}
private static object CoerceSelectedDateTime(DependencyObject d, object value)
{
FXDatePicker datepicker = (FXDatePicker)d;
if (value != null)
{
DateTime newValue = (DateTime)value;
DateTime min = datepicker.MinDate;
if (newValue < min)
{
return(min);
}
DateTime max = datepicker.MaxDate;
if (newValue > max)
{
return(max);
}
}
return(value);
}
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));
}
}