/// <summary>
/// StretchDirectionProperty property changed handler.
/// </summary>
/// <param name="d">Viewbox that changed its StretchDirection.</param>
/// <param name="e">Event arguments.</param>
private static void OnStretchDirectionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Viewbox viewBox = (Viewbox)d;
if (e.NewValue != e.OldValue)
{
// The StretchDirection property affects measuring
viewBox.InvalidateMeasure();
}
}
/// <summary>
/// StretchDirectionProperty property changed handler.
/// </summary>
/// <param name="d">Viewbox that changed its StretchDirection.</param>
/// <param name="e">Event arguments.</param>
private static void OnStretchDirectionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Viewbox vb = (Viewbox)d;
if (!IsValidStretchDirectionValue(e.NewValue))
{
// revert the change
vb.StretchDirection = (StretchDirection)e.OldValue;
throw new ArgumentException("StretchDirection");
}
// The StretchDirection property affects measuring
vb.InvalidateMeasure();
}