/// <summary>
/// TextProperty property changed handler.
/// </summary>
/// <param name="d">PersianDatePicker that changed its Text.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
if (!dp.IsHandlerSuspended(PersianDatePicker.TextProperty))
{
string newValue = e.NewValue as string;
if (newValue != null)
{
if (dp._textBox != null)
{
dp._textBox.Text = newValue;
}
else
{
dp._defaultText = newValue;
}
dp.SetSelectedDate();
}
else
{
dp.SetValueNoCallback(PersianDatePicker.SelectedDateProperty, null);
}
}
}
/// <summary>
/// IsDropDownOpenProperty property changed handler.
/// </summary>
/// <param name="d">PersianDatePicker that changed its IsDropDownOpen.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnIsDropDownOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
bool newValue = (bool)e.NewValue;
if (dp._popUp != null && dp._popUp.IsOpen != newValue)
{
dp._popUp.IsOpen = newValue;
if (newValue)
{
dp._originalSelectedDate = dp.SelectedDate;
// When the popup is opened set focus to the DisplayDate button.
// Do this asynchronously because the IsDropDownOpen could
// have been set even before the template for the PersianDatePicker is
// applied. And this would mean that the visuals wouldn't be available yet.
dp.Dispatcher.BeginInvoke(DispatcherPriority.Input, (Action) delegate()
{
// setting the focus to the calendar will focus the correct date.
dp._persianCalendar.Focus();
});
}
}
}
/// <summary>
/// SelectedDateProperty property changed handler.
/// </summary>
/// <param name="d">PersianDatePicker that changed its SelectedDate.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnSelectedDateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
Collection <DateTime> addedItems = new Collection <DateTime>();
Collection <DateTime> removedItems = new Collection <DateTime>();
DateTime?addedDate;
DateTime?removedDate;
dp.CoerceValue(DisplayDateStartProperty);
dp.CoerceValue(DisplayDateEndProperty);
dp.CoerceValue(DisplayDateProperty);
addedDate = (DateTime?)e.NewValue;
removedDate = (DateTime?)e.OldValue;
if (dp.SelectedDate.HasValue)
{
DateTime day = dp.SelectedDate.Value;
dp.SetTextInternal(dp.DateTimeToString(day));
// When DatePickerDisplayDateFlag is TRUE, the SelectedDate change is coming from the PersianCalendar UI itself,
// so, we shouldn't change the DisplayDate since it will automatically be changed by the PersianCalendar
if ((day.Month != dp.DisplayDate.Month || day.Year != dp.DisplayDate.Year) && !dp._persianCalendar.DatePickerDisplayDateFlag)
{
dp.DisplayDate = day;
}
dp._persianCalendar.DatePickerDisplayDateFlag = false;
}
else
{
dp.SetWaterMarkText();
}
if (addedDate.HasValue)
{
addedItems.Add(addedDate.Value);
}
if (removedDate.HasValue)
{
removedItems.Add(removedDate.Value);
}
dp.OnSelectedDateChanged(new CalendarSelectionChangedEventArgs(PersianDatePicker.SelectedDateChangedEvent, removedItems, addedItems));
DatePickerAutomationPeer peer = UIElementAutomationPeer.FromElement(dp) as DatePickerAutomationPeer;
// Raise the propetyChangeEvent for Value if Automation Peer exist
if (peer != null)
{
string addedDateString = addedDate.HasValue ? dp.DateTimeToString(addedDate.Value) : "";
string removedDateString = removedDate.HasValue ? dp.DateTimeToString(removedDate.Value) : "";
peer.RaiseValuePropertyChangedEvent(removedDateString, addedDateString);
}
}
private static object CoerceSelectedDate(DependencyObject d, object value)
{
PersianDatePicker dp = d as PersianDatePicker;
// We set _persianCalendar.SelectedDate in order to get _persianCalendar to compute the coerced value
dp._persianCalendar.SelectedDate = (DateTime?)value;
return(dp._persianCalendar.SelectedDate);
}
private static object CoerceDisplayDateStart(DependencyObject d, object value)
{
PersianDatePicker dp = d as PersianDatePicker;
// We set _persianCalendar.DisplayDateStart in order to get _persianCalendar to compute the coerced value
dp._persianCalendar.DisplayDateStart = (DateTime?)value;
return(dp._persianCalendar.DisplayDateStart);
}
/// <summary>
/// DisplayDateEndProperty property changed handler.
/// </summary>
/// <param name="d">PersianDatePicker that changed its DisplayDateEnd.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnDisplayDateEndChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
dp.CoerceValue(DisplayDateProperty);
}
/// <summary>
/// Called when the IsEnabled property changes.
/// </summary>
private static void OnIsEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
dp.CoerceValue(IsDropDownOpenProperty);
OnVisualStatePropertyChanged(dp);
}
private static object OnCoerceText(DependencyObject dObject, object baseValue)
{
PersianDatePicker dp = (PersianDatePicker)dObject;
if (dp._shouldCoerceText)
{
dp._shouldCoerceText = false;
return(dp._coercedTextValue);
}
return(baseValue);
}
private static object OnCoerceIsDropDownOpen(DependencyObject d, object baseValue)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
if (!dp.IsEnabled)
{
return(false);
}
return(baseValue);
}
/// <summary>
/// Called when this element gets focus.
/// </summary>
private static void OnGotFocus(object sender, RoutedEventArgs e)
{
// When Datepicker gets focus move it to the TextBox
PersianDatePicker picker = (PersianDatePicker)sender;
if ((!e.Handled) && (picker._textBox != null))
{
if (e.OriginalSource == picker)
{
picker._textBox.Focus();
e.Handled = true;
}
else if (e.OriginalSource == picker._textBox)
{
picker._textBox.SelectAll();
e.Handled = true;
}
}
}
private static void OnVisualStatePropertyChanged(PersianDatePicker dp)
{
if (Validation.GetHasError(dp))
{
if (dp.IsKeyboardFocused)
{
VisualStateManager.GoToState(dp, VisualStates.StateInvalidFocused, true);
}
else
{
VisualStateManager.GoToState(dp, VisualStates.StateInvalidUnfocused, true);
}
}
else
{
VisualStateManager.GoToState(dp, VisualStates.StateValid, true);
}
// If you remove the following code you will be faced with a crazy component.
VisualStateManager.GoToState(dp, dp.IsEnabled ? VisualStates.StateNormal : VisualStates.StateDisabled, true);
}
/// <summary>
/// SelectedDateFormatProperty property changed handler.
/// </summary>
/// <param name="d">PersianDatePicker that changed its SelectedDateFormat.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnSelectedDateFormatChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PersianDatePicker dp = d as PersianDatePicker;
Debug.Assert(dp != null);
if (dp._textBox != null)
{
// Update DatePickerTextBox.Text
if (string.IsNullOrEmpty(dp._textBox.Text))
{
dp.SetWaterMarkText();
}
else
{
DateTime?date = dp.ParseText(dp._textBox.Text);
if (date != null)
{
dp.SetTextInternal(dp.DateTimeToString((DateTime)date));
}
}
}
}