private void initUi(String blobUrl, JsArray<BlobInfoJS> files) {
populateFilePanel(files);
setHelpClicked();
mainPanel.uploadButton.setAction(blobUrl);
mainPanel.draggablePanel.setMoveCallback(new MoveCallback() {
@Override
public void onMove(MoveEvent e) {
AutoBean<MoveEvent> autoBean = AutoBeanUtils.getAutoBean(e);
String payload = AutoBeanCodex.encode(autoBean).getPayload();