MainWindow.glade (Código)

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.38.2 -->
<interface>
    <requires lib="gtk+" version="3.24"/>
    <object class="GtkListStore" id="liststore">
        <columns>
            <!-- column-name id -->
            <column type="gint"/>
            <!-- column-name state -->
            <column type="gchararray"/>
        </columns>
    </object>
    <object class="GtkEntryCompletion" id="entry-completion">
        <property name="model">liststore</property>
        <property name="text-column">1</property>
        <child>
            <object class="GtkCellRendererText" id="cellrender-state"/>
            <attributes>
                <attribute name="text">1</attribute>
            </attributes>
        </child>
    </object>
    <object class="GtkApplicationWindow" id="MainWindow">
        <property name="can-focus">False</property>
        <property name="title" translatable="yes">GTK.EntryCompletion</property>
        <property name="default-width">683</property>
        <property name="default-height">384</property>
        <property name="icon">../../../assets/icons/icon.png</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">Digite o nome de algum estado brasileiro:</property>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">0</property>
                    </packing>
                </child>
                <child>
                    <object class="GtkEntry">
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="placeholder-text" translatable="yes">Nome do estado</property>
                        <property name="completion">entry-completion</property>
                    </object>
                    <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">1</property>
                    </packing>
                </child>
            </object>
        </child>
    </object>
</interface>