MainWindow.ui (Código)

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.38.2 -->
<interface>
    <requires lib="gtk+" version="3.20"/>
    <template class="MainWindow" parent="GtkApplicationWindow">
        <property name="can-focus">False</property>
        <property name="title" translatable="yes">Gtk.Notebook</property>
        <property name="default-width">683</property>
        <property name="default-height">384</property>
        <property name="icon">../../../assets/icons/icon.png</property>
        <child>
            <object class="GtkNotebook">
                <property name="visible">True</property>
                <property name="can-focus">True</property>
                <child>
                    <object class="GtkBox">
                        <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>
                        <child>
                            <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="label" translatable="yes">label 1</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">0</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="label" translatable="yes">label 2</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">1</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="label" translatable="yes">label 3</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">2</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="label" translatable="yes">label 4</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">3</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="label" translatable="yes">label 5</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">4</property>
                            </packing>
                        </child>
                    </object>
                </child>
                <child type="tab">
                    <object class="GtkLabel">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="label" translatable="yes">Pagina 1</property>
                    </object>
                    <packing>
                        <property name="tab-fill">False</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkBox">
                        <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>
                        <child>
                            <object class="GtkButton">
                                <property name="label" translatable="yes">Botão 1</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">0</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkButton">
                                <property name="label" translatable="yes">Botão 2</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">1</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkButton">
                                <property name="label" translatable="yes">Botão 3</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">2</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkButton">
                                <property name="label" translatable="yes">Botão 4</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">3</property>
                            </packing>
                        </child>
                        <child>
                            <object class="GtkButton">
                                <property name="label" translatable="yes">Botão 5</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                            </object>
                            <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">4</property>
                            </packing>
                        </child>
                    </object>
                    <packing>
                        <property name="position">1</property>
                    </packing>
                </child>
                <child type="tab">
                    <object class="GtkImage">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="icon-name">folder-documents-symbolic</property>
                        <property name="icon_size">1</property>
                    </object>
                    <packing>
                        <property name="position">1</property>
                        <property name="tab-fill">False</property>
                    </packing>
                </child>
                <child>
                    <placeholder/>
                </child>
                <child type="tab">
                    <placeholder/>
                </child>
            </object>
        </child>
    </template>
</interface>