/// <summary>
/// RevealModeProperty property changed handler.
/// </summary>
/// <param name="d">ExpandableContentControl that changed its RevealMode.</param>
/// <param name="e">Event arguments.</param>
private static void OnRevealModePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ExpandableContentControl source = (ExpandableContentControl)d;
ExpandDirection value = (ExpandDirection)e.NewValue;
if (value != ExpandDirection.Down &&
value != ExpandDirection.Left &&
value != ExpandDirection.Right &&
value != ExpandDirection.Up)
{
// revert to old value
source.RevealMode = (ExpandDirection)e.OldValue;
string message = string.Format(
CultureInfo.InvariantCulture,
"Properties.Resources.Expander_OnExpandDirectionPropertyChanged_InvalidValue",
value);
throw new ArgumentException(message, "e");
}
// set the non-reveal dimension
source.SetNonRevealDimension();
// calculate the reveal dimension
source.SetRevealDimension();
}
