Tabbal orientation inside a window

In a Window I use the attachTabbar to create a bar with two tabs.

To the tabs content I attach Grids.

How can I set the mode as “left” to display tabs vertically?

Thanks in advance

In common case tabbar can be left-aligned: … 1369745000

But currently attachTabbar method allows only top orientation of tabs.

The next version 2.5 will support all orientations (top, bottom, left and right).