/// <summary>
/// Handles the property changed event of the ToolTip property.
/// </summary>
/// <param name="sender">Object whose value got changed.</param>
/// <param name="args">Event args containing instance data.</param>
private static void OnToolTipChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
BaseLabel label = sender as BaseLabel;
if (label != null)
{
ToolTipService.SetToolTip(label, args.NewValue);
}
}
/// <summary>
/// Handles the property changed event of the DisplayValue property.
/// </summary>
/// <param name="sender">Object whose value got changed.</param>
/// <param name="args">Event args containing instance data.</param>
private static void OnDisplayValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
BaseLabel label = sender as BaseLabel;
if (label != null)
{
if (args.Property == DisplayValueProperty && !label.CanChangeDisplayValue)
{
label.CanChangeDisplayValue = true;
label.DisplayValue = args.OldValue as string;
label.CanChangeDisplayValue = false;
throw new InvalidOperationException("DisplayValue property is readonly.");
}
if (string.IsNullOrEmpty(label.DisplayValue))
{
label.Visibility = Visibility.Collapsed;
}
else
{
label.Visibility = Visibility.Visible;
}
}
}