message.getElement().getStyle().setProperty("padding", "0px");
HorizontalPanel buttonPanel = new HorizontalPanel();
okButton = new Button("OK");
okListener = new ClickCallbackListener(this, AcceptsCallback.MESSAGE_OK);
okButton.addClickHandler(okListener);
buttonPanel.add(okButton);
cancelButton = new Button("Cancel");
cancelListener = new ClickCallbackListener(this, AcceptsCallback.MESSAGE_CANCEL);
cancelButton.addClickHandler(cancelListener);
dockPanel.add(cancelButton, DockPanel.SOUTH);
buttonPanel.add(cancelButton);