MainWindow.ui (Código)

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.38.2 -->
<interface>
    <requires lib="gtk+" version="3.24"/>
    <template class="MainWindow" parent="GtkApplicationWindow">
        <property name="can_focus">False</property>
        <property name="title" translatable="yes">Gtk.RadioButton</property>
        <property name="default_width">683</property>
        <property name="default_height">384</property>
        <property name="icon">../../../assets/icons/icon.png</property>
        <child type="titlebar">
            <placeholder/>
        </child>
        <child>
            <object class="GtkButtonBox" id="radio-button-box">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="border_width">12</property>
                <property name="orientation">vertical</property>
                <property name="spacing">6</property>
                <property name="layout_style">center</property>
                <child>
                    <object class="GtkRadioButton" id="radio-button-01">
                        <property name="label" translatable="yes">Radio button 01</property>
                        <property name="visible">True</property>
                        <property name="can_focus">True</property>
                        <property name="receives_default">False</property>
                        <property name="active">True</property>
                        <property name="draw_indicator">True</property>
                        <signal name="toggled" handler="on_radiobutton_toggled" swapped="no"/>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">1</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkRadioButton" id="radio-button-02">
                        <property name="label" translatable="yes">Radio button 02</property>
                        <property name="visible">True</property>
                        <property name="can_focus">True</property>
                        <property name="receives_default">False</property>
                        <property name="draw_indicator">True</property>
                        <property name="group">radio-button-01</property>
                        <signal name="toggled" handler="on_radiobutton_toggled" swapped="no"/>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">2</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkRadioButton" id="radio-button-03">
                        <property name="label" translatable="yes">Radio button 03</property>
                        <property name="visible">True</property>
                        <property name="can_focus">True</property>
                        <property name="receives_default">False</property>
                        <property name="draw_indicator">True</property>
                        <property name="group">radio-button-01</property>
                        <signal name="toggled" handler="on_radiobutton_toggled" swapped="no"/>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">3</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkRadioButton" id="radio-button-04">
                        <property name="label" translatable="yes">Radio button 04</property>
                        <property name="visible">True</property>
                        <property name="can_focus">True</property>
                        <property name="receives_default">False</property>
                        <property name="draw_indicator">True</property>
                        <property name="group">radio-button-01</property>
                        <signal name="toggled" handler="on_radiobutton_toggled" swapped="no"/>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">4</property>
                    </packing>
                </child>
            </object>
        </child>
    </template>
</interface>