gtk/demos/gtk-demo/themes.ui

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <object class="GtkWindow" id="window">
    <property name="resizable">0</property>
    <child type="titlebar">
      <object class="GtkHeaderBar" id="header">
        <property name="show-title-buttons">1</property>
        <child type="start">
          <object class="GtkToggleButton" id="toggle">
            <property name="label">Cycle</property>
          </object>
        </child>
        <child type="end">
          <object class="GtkLabel" id="fps"/>
        </child>
      </object>
    </child>
    <child>
      <object class="GtkGrid" id="grid">
        <property name="margin-start">10</property>
        <property name="margin-end">10</property>
        <property name="margin-top">10</property>
        <property name="margin-bottom">10</property>
        <property name="row-spacing">10</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkBox">
            <property name="valign">center</property>
            <property name="halign">center</property>
            <style>
              <class name="linked"/>
            </style>
            <child>
              <object class="GtkButton">
                <property name="label" translatable="yes">Hi, I am a button</property>
                <property name="receives-default">1</property>
              </object>
            </child>
            <child>
              <object class="GtkButton">
                <property name="label" translatable="yes">And I&apos;m another button</property>
                <property name="receives-default">1</property>
              </object>
            </child>
            <child>
              <object class="GtkButton">
                <property name="label" translatable="yes">This is a button party!</property>
                <property name="receives-default">1</property>
              </object>
            </child>
          </object>
        </child>
        <child>
          <object class="GtkBox">
            <property name="spacing">10</property>
            <child>
              <object class="GtkButton">
                <property name="label">Plain</property>
                <property name="halign">end</property>
                <property name="hexpand">1</property>
                <property name="vexpand">1</property>
              </object>
            </child>
            <child>
              <object class="GtkButton">
                <property name="label">Destructive</property>
                <style>
                  <class name="destructive-action"/>
                </style>
              </object>
            </child>
            <child>
              <object class="GtkButton">
                <property name="label">Suggested</property>
                <style>
                  <class name="suggested-action"/>
                </style>
              </object>
            </child>
          </object>
        </child>
      </object>
    </child>
  </object>
</interface>