Description A GtkRadioToolButton is a GtkToolItem that contains a radio button, that is, a button that is part of a group of toggle buttons where only one button can be active at a time. Use gtk_radio_tool_button_new() to create a new GtkRadioToolButton. use gtk_radio_tool_button_new_from_widget() to create a new GtkRadioToolButton that is part of the same group as an existing GtkRadioToolButton. Use gtk_radio_tool_button_new_from_stock() or gtk_radio_tool_button_new_from_widget_with_stock() to create a new GtkRAdioToolButton containing a stock item.