void OnHeaderOrFooterChanged(ref Element storage, string property, object dataObject, DataTemplate template, bool templateChanged)
{
if (dataObject == null)
{
if (!templateChanged)
{
OnPropertyChanging(property);
storage = null;
OnPropertyChanged(property);
}
return;
}
if (template == null)
{
var view = dataObject as Element;
if (view == null || view is Page)
{
view = new Label {
Text = dataObject.ToString()
}
}
;
view.Parent = this;
OnPropertyChanging(property);
storage = view;
OnPropertyChanged(property);
}
else if (storage == null || templateChanged)
{
OnPropertyChanging(property);
storage = template.CreateContent() as Element;
if (storage != null)
{
storage.BindingContext = dataObject;
storage.Parent = this;
}
OnPropertyChanged(property);
}
else
{
storage.BindingContext = dataObject;
}
}
