gtk_cell_renderer_toggle_new ()
Creates a new GtkCellRendererToggle. Adjust rendering
parameters using object properties. Object properties can be set
globally (with g_object_set()). Also, with GtkTreeViewColumn, you
can bind a property to a value in a GtkTreeModel. For example, you
can bind the "active" property on the cell renderer to a boolean value
in the model, thus causing the check button to reflect the state of
the model.
gtk_cell_renderer_toggle_set_radio ()
If radio is TRUE, the cell renderer renders a radio toggle
(i.e. a toggle in a group of mutually-exclusive toggles).
If FALSE, it renders a check toggle (a standalone boolean option).
This can be set globally for the cell renderer, or changed just
before rendering each cell in the model (for GtkTreeView, you set
up a per-row setting using GtkTreeViewColumn to associate model
columns with cell renderer properties).