gnome-control-center/panels/region/input-chooser.ui

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <object class="GtkDialog" id="input-dialog">
    <property name="title" translatable="yes">Add an Input Source</property>
    <property name="resizable">False</property>
    <property name="modal">True</property>
    <property name="destroy_with_parent">True</property>
    <property name="resizable">True</property>
    <child internal-child="vbox">
      <object class="GtkBox" id="vbox">
        <property name="visible">True</property>
        <property name="orientation">vertical</property>
        <property name="spacing">0</property>
        <child>
          <object class="GtkScrolledWindow" id="scrolledwindow">
            <property name="visible">True</property>
            <property name="hscrollbar-policy">never</property>
            <property name="vscrollbar-policy">never</property>
            <property name="shadow-type">in</property>
            <property name="margin-start">6</property>
            <property name="margin-end">6</property>
            <property name="margin-top">6</property>
            <property name="margin-bottom">6</property>
            <child>
              <object class="GtkViewport" id="viewport">
                <property name="visible">True</property>
                <child>
                  <object class="GtkListBox" id="list">
                    <property name="visible">True</property>
                    <property name="can-focus">True</property>
                    <property name="vexpand">True</property>
                    <property name="halign">fill</property>
                    <property name="valign">fill</property>
                  </object>
                </child>
              </object>
            </child>
          </object>
        </child>
        <child>
          <object class="GtkSearchEntry" id="filter-entry">
            <property name="visible">False</property>
            <property name="hexpand">True</property>
            <property name="margin-start">6</property>
            <property name="margin-end">6</property>
            <property name="margin-top">6</property>
            <property name="margin-bottom">6</property>
          </object>
        </child>
        <child internal-child="action_area">
          <object class="GtkButtonBox" id="action-area">
            <property name="visible">True</property>
            <property name="orientation">horizontal</property>
            <child>
              <object class="GtkButton" id="cancel-button">
                <property name="visible">True</property>
                <property name="label">gtk-cancel</property>
                <property name="use_stock">True</property>
                <property name="use_underline" >True</property>
              </object>
            </child>
            <child>
              <object class="GtkButton" id="add-button">
                <property name="visible">True</property>
                <property name="sensitive">False</property>
                <property name="label">gtk-add</property>
                <property name="use_stock">True</property>
                <property name="use_underline" >True</property>
              </object>
            </child>
          </object>
        </child>
      </object>
    </child>
    <action-widgets>
      <action-widget response="-5">add-button</action-widget>
      <action-widget response="-6">cancel-button</action-widget>
    </action-widgets>
  </object>
</interface>