Vaadin focus Grid inside Panel - focus

Question

I have two Grids (both in its own panel), and want to navigate between them using the Tab Key.
To do that I'm trying to focus the Grid inside a Panel (If Tab is pressed, the Grid should gain focus, so I can use the up/Down key to select Items).
Vaadin doesn't provide a .focus() method for Grid. Is there any solution so I can focus the Grid anyway?

Answer 1

Here is small example which shows working scenario with
Tab key pressed
Arrows down/up should points to a row (exactly in Valo this is presented as contour around one cell)
Space makes row selected (if Grid has enabled selection!) - row should be highlighted.
Code example:
#Theme ( ValoTheme.THEME_NAME )
public class MyUI extends UI {
public class A {
String a;
String b;
A(String a, String b) {
this.a = a;
this.b = b;
}
// getters & setters
}
#Override
protected void init ( VaadinRequest vaadinRequest )
{
Grid g = new Grid();
List<A> list = Arrays.asList(new A("a", "b"), new A("aa", "bb"),
new A("aaa", "bbb"));
BeanItemContainer<A> items = new BeanItemContainer<>(A.class, list);
g.setContainerDataSource(items);
Panel p = new Panel(g);
setContent(p);
}
}
Tested: Vaadin 7.5, Java 8, Tomcat 8.
You could try to use:
setFocusedComponent(p);
after setContent(p). This should exactly tells Vaadin to make panel focused. But you still must press tab - once or more (depending on rest of components, which you placed on screen).
But make sure:
Grid is selectable.
Maybe you should press Tab more than once.
Depending on Theme there could be different effects of getting focus (or even select state). It is also possible that you use some predefined project which has blocked grid css to make it lighter. So check if you can highlight one row by click on it.
Without more information I can't help more.

Answer 2

The OP write in an edit:
Solved the problem using Javascript/Jquery. Added this to my Panel that contains the Grid:
public class FileTable extends Panel
{
String id;
public FileTable(String id)
{
this.id=id;
Grid table = new Grid();
initGrid();
fileTable.setId(id);
}
public void focus()
{
JavaScript.getCurrent().execute("$(\"#"+id+" table:first td:first\").click();");
}
}