/**
* Creates a FileUpload widget that wraps an existing <input type='file'> element.
*
* <p>This element must already be attached to the document. If the element is removed from the
* document, you must call {@link RootPanel#detachNow(Widget)}.
*
* @param element the element to be wrapped
*/
public static FileUpload wrap(Element element) {
// Assert that the element is attached.
assert Document.get().getBody().isOrHasChild(element);
FileUpload fileUpload = new FileUpload(element);
// Mark it attached and remember it for cleanup.
fileUpload.onAttach();
RootPanel.detachOnWindowClose(fileUpload);
return fileUpload;
}
