private IList<IMvxUpdateableBinding> GetOrCreateBindingsList(FrameworkElement attachedObject)
{
var existing = attachedObject.GetValue(BindingsListProperty) as IList<IMvxUpdateableBinding>;
if (existing != null)
return existing;
// attach the list
var newList = new List<IMvxUpdateableBinding>();
attachedObject.SetValue(BindingsListProperty, newList);
// create a binding watcher for the list
#if WINDOWS_WPF
var binding = new System.Windows.Data.Binding();
#endif
#if WINDOWS_COMMON
var binding = new Windows.UI.Xaml.Data.Binding();
#endif
bool attached = false;
Action attachAction = () =>
{
if (attached)
return;
BindingOperations.SetBinding(attachedObject, DataContextWatcherProperty, binding);
attached = true;
};
Action detachAction = () =>
{
if (!attached)
return;
#if WINDOWS_COMMON
attachedObject.ClearValue(DataContextWatcherProperty);
#else
BindingOperations.ClearBinding(attachedObject, DataContextWatcherProperty);
#endif
attached = false;
};
attachAction();
attachedObject.Loaded += (o, args) =>
{
attachAction();
};
attachedObject.Unloaded += (o, args) =>
{
detachAction();
};
return newList;
}
private static void ReplaceCachedLocalValueHelper(FrameworkElement element, DependencyProperty property, object value)
{
if (value == DependencyProperty.UnsetValue)
{
element.ClearValue(property);
}
else
{
//BindingExpression expression = value as BindingExpression;
//if (expression != null)
//{
// element.SetBinding(property, expression);
//}
//else
//{
value = ConvertValueToExpectedType(property, value);
element.SetValue(property, value);
//}
}
}