/** Open the dialog */
public QueryOptionsPack open(QueryOptionsPack opt) {
createContents(opt);
shell.setLocation(
getParent().getLocation().x + (getParent().getSize().x / 2) - (shell.getSize().x / 2),
getParent().getLocation().y + (getParent().getSize().y / 2) - (shell.getSize().y / 2));
shell.open();
shell.layout();
Display display = getParent().getDisplay();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
return opt;
}
