How to provide in-place editors for row headers in a vertical grid

This example demonstrates how to manually draw an editor in row headers and activate them on a mouse click. To implement this functionality in a project, it’s necessary to:

- Add the DrawEditorHelper and RowInplaceEditorHelper classes to the solution;

- Create a RowInplaceEditorHelper class instance and set the vertical grid’s row and a corresponding repository item as parameters.