Dropdown scroll problem


I’ve been writing application with vaadin for 6 months. I’ve encountered a dropdown scroll problem when i get closer to the end of the project. Writing extension is not effective solution for my project, because there are many dropdowns (like comboboxes, menus, popupbuttons, etc…).
I wrote simple demo to show the dropdown problem.

Here is link and source code.

// PopupproblemUI.java
public class PopupproblemUI extends UI {
  @WebServlet(value = "/*", asyncSupported = true)
    @VaadinServletConfiguration(productionMode = false, ui = PopupproblemUI.class)
    public static class Servlet extends VaadinServlet {

    protected void init(VaadinRequest request) {
        final CustomLayout layout = new CustomLayout("test");
  ComboBox combobox = new ComboBox();
        layout.addComponent(combobox, "combobox");

        combobox.addItem("Item 1");
        combobox.addItem("Item 2");
        combobox.addItem("Item 3");

//test.html in themes/mytheme/layouts
<div style="height:2000px;">
<div location="combobox"></div>

When i click combobox then scroll down to the page, dropdown of combobox goes down too. How can i fix this problem. Please write detailed explanation or advice because i’ve tried many ways and i can’t handle the problem. I need help.

Emir Cem.


unfortunately this is quite an old issue (see
). As far as I know there’s currently no fix for it. It hasn’t even got any feature votes through the support offering, so I guess it’s just not that important and/or developers are working around it somehow.

Hi guys,
is there any solution on schedule for this problem?
It still exists with Vaadin-7.4.0 and RUNO theme…
Thx, Roman!