/// <summary>Updates the adorner.</summary>
/// <param name="element">The element.</param>
/// <param name="hide">If set to <c>True</c> hide the adorner.</param>
void UpdateAdorner(FrameworkElement element, bool hide = false)
{
if (element == null || myAdornerLayer == null)
{
return;
}
myAdornerLabel = new AdornerLabel(this, Note, NoteStyle);
RemoveAdorners <AdornerLabel>(myAdornerLayer, element);
if (!((InfoTextBox)element).HasText && !element.IsFocused && !hide)
{
myAdornerLayer.Add(myAdornerLabel);
}
}
/// <summary>Is called when a control template is applied.</summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
myAdornerLayer = AdornerLayer.GetAdornerLayer(this);
myAdornerLabel = new AdornerLabel(this, Note, NoteStyle);
UpdateAdorner(this);
DependencyPropertyDescriptor focusProp = DependencyPropertyDescriptor.FromProperty(
IsFocusedProperty, typeof(FrameworkElement));
if (focusProp != null)
{
focusProp.AddValueChanged(this, delegate { UpdateAdorner(this); });
}
DependencyPropertyDescriptor containsTextProp = DependencyPropertyDescriptor.FromProperty(
HasTextProperty, typeof(InfoTextBox));
if (containsTextProp != null)
{
containsTextProp.AddValueChanged(this, delegate { UpdateAdorner(this); });
}
}