It is possible. In order to achieve the scenario from the screenshot, the first thing you need is to make the treeview items take up the whole row:

For the content on the right, you have two options for creating it:

• on-the-fly, when an item is hovered
• during initialization

Depending on the size of your treeview, you can consider both of these approaches -- for larger treeviews, creating the content when the items are hovered is recommended, since it minimizes the markup on the page. Either way, you can attach a mouseenter and mouseleave event handlers to the .k-in elements, and show / hide the additional content.