/// <summary>
/// Handles changes to the DataContextPiggyBack property.
/// </summary>
private static void OnDataContextPiggyBackChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement targetElement = d as FrameworkElement;
// whenever the targeElement DataContext is changed, copy the updated property
// value to our MultiBinding.
MultiBindings relay = GetMultiBindings(targetElement);
relay.SetDataContext(targetElement.DataContext);
}
/// <summary>
/// Invoked when the MultiBinding property is set on a framework element
/// </summary>
private static void OnMultiBindingsChanged(DependencyObject depObj, DependencyPropertyChangedEventArgs e)
{
FrameworkElement targetElement = depObj as FrameworkElement;
// bind the target elements DataContext, to our DataContextPiggyBack property
// this allows us to get property changed events when the targetElement
// DataContext changes
targetElement.SetBinding(DataContextPiggyBackProperty, new Binding());
MultiBindings bindings = GetMultiBindings(targetElement);
bindings.Initialize(targetElement);
}
public static void SetMultiBindings(DependencyObject obj, MultiBindings value)
{
obj.SetValue(MultiBindingsProperty, value);
}
public static void SetMultiBindings(DependencyObject obj, MultiBindings value)
{
obj.SetValue(MultiBindingsProperty, value);
}