Sets the current keyboard focus to be at
path, and selects it.
This is useful when you want to focus the user’s attention on a particular item. If
cell is not null
, then focus is given to the cell specified by it. Additionally, if
start_editing is true,
then editing should be started in the specified cell.
This function is often followed by `gtk_widget_grab_focus (icon_view)` in order to give keyboard focus to the widget. Please note that editing can only happen when the widget is realized.
One of the cell renderers of this, or null
true if the specified cell should start being edited.