[libhandy] demo: Add examples with a prefix widget for expander rows

[Adrien Plazas <aplazas src gnome org>]

commit 5062df0fcf713f3578ce6d8abab90aaf84cfae39
Author: vanadiae <vanadiae35 gmail com>
Date:   Fri Jun 26 19:19:37 2020 +0200

    demo: Add examples with a prefix widget for expander rows
    
    To be able to see how it looks like easily.

 examples/hdy-demo-window.ui | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
---
diff --git a/examples/hdy-demo-window.ui b/examples/hdy-demo-window.ui
index b1a4fa9b..2307b9b7 100644
--- a/examples/hdy-demo-window.ui
+++ b/examples/hdy-demo-window.ui
@@ -1363,6 +1363,73 @@
                                     </child>
                                   </object>
                                 </child>
+                                <child>
+                                  <object class="HdyExpanderRow">
+                                    <property name="title" translatable="yes">Expander row with a 
prefix</property>
+                                    <property name="visible">True</property>
+                                    <child type="prefix">
+                                      <object class="GtkButton">
+                                        <property name="visible">True</property>
+                                        <property name="valign">center</property>
+                                        <style>
+                                          <class name="list-button"/>
+                                        </style>
+                                        <child>
+                                          <object class="GtkImage">
+                                            <property name="visible">True</property>
+                                            <property name="icon-name">system-shutdown-symbolic</property>
+                                          </object>
+                                        </child>
+                                      </object>
+                                    </child>
+                                    <child>
+                                      <object class="HdyActionRow">
+                                        <property name="title" translatable="yes">A nested row</property>
+                                        <property name="visible">True</property>
+                                      </object>
+                                    </child>
+                                    <child>
+                                      <object class="HdyActionRow">
+                                        <property name="title" translatable="yes">Another nested 
row</property>
+                                        <property name="visible">True</property>
+                                      </object>
+                                    </child>
+                                  </object>
+                                </child>
+                                <child>
+                                  <object class="HdyExpanderRow">
+                                    <property name="title" translatable="yes">Expander row with a prefix and 
icon</property>
+                                    <property name="visible">True</property>
+                                    <property name="icon-name">action-unavailable-symbolic</property>
+                                    <child type="prefix">
+                                      <object class="GtkButton">
+                                        <property name="visible">True</property>
+                                        <property name="valign">center</property>
+                                        <style>
+                                          <class name="list-button"/>
+                                        </style>
+                                        <child>
+                                          <object class="GtkImage">
+                                            <property name="visible">True</property>
+                                            <property name="icon-name">system-shutdown-symbolic</property>
+                                          </object>
+                                        </child>
+                                      </object>
+                                    </child>
+                                    <child>
+                                      <object class="HdyActionRow">
+                                        <property name="title" translatable="yes">A nested row</property>
+                                        <property name="visible">True</property>
+                                      </object>
+                                    </child>
+                                    <child>
+                                      <object class="HdyActionRow">
+                                        <property name="title" translatable="yes">Another nested 
row</property>
+                                        <property name="visible">True</property>
+                                      </object>
+                                    </child>
+                                  </object>
+                                </child>
                                 <child>
                                   <object class="HdyExpanderRow" id="enable_expander_row">
                                     <property name="show_enable_switch">True</property>