I think the tile layout is a really cool new feature for making reporting dashboards that users can customize.  One thing that users would want is the ability to add new items at a specific location.  I imagine the tile layout control being a drop target where a user can drag a draggable item onto the tile layout surface and the new item can be added at the location where the user dragged the item.

Is this something you can add to the control in the future?

A key feature of the TileLayout widget is the fact that the user can modify the layout. This makes little sense if their changes are lost whenever they close the window.

I want to preserve those changes. It would be helpful if the resize event contained information about the new rowSpan and colSpan of the resized item.