set_focus_cell
Description:
Explicitly sets the currently focused cell to renderer.
This is generally called by implementations of `GtkCellAreaClass.focus()` or `GtkCellAreaClass.event()`, however it can also be used to implement functions such as set_cursor_on_cell.
Parameters:
| this |
a `GtkCellArea` |
| renderer |
the `GtkCellRenderer` to give focus to |