fgdata/gui/dialogs/pushback.xml

<?xml version="1.0"?>
<PropertyList>

   <name>pushback</name>
   <layout>vbox</layout>
   <nasal>
     <open>
       var pushback_position = aircraft.door.new("sim/model/pushback", 10.0);
       pushback_position.setpos(pushback_position.getpos());
       props.globals.initNode("/sim/model/pushback/enabled", 0, "BOOL" );
       props.globals.initNode("/sim/model/pushback/magnitude", 0.0  );
     </open>
   </nasal>

    <group>
     <layout>hbox</layout>
     <text>
      <label>Pushback</label>
     </text>

     <empty><stretch>true</stretch></empty>

     <button>
      <legend></legend>
      <key>Esc</key>
      <pref-width>16</pref-width>
      <pref-height>16</pref-height>
      <border>2</border>
      <binding>
	 <command>dialog-close</command>
	</binding>
     </button>
    </group>

    <hrule/>

    <group>
      <stretch>true</stretch>
      <layout>vbox</layout>
      <halign>center</halign>
      <valign>top</valign>

    <checkbox>
      <halign>left</halign>
      <label>Show pushback</label>
      <property>/sim/model/pushback/enabled</property>
      <binding>
       <command>property-toggle</command>
       <property>/sim/model/pushback/enabled</property>
      </binding>
    </checkbox>

    <checkbox>
      <halign>left</halign>
      <label>Connect pushback</label>
      <property>/sim/model/pushback/position-norm</property>
      <binding>
       <command>nasal</command>
       <script>pushback_position.toggle();</script>
      </binding>
    </checkbox>

  <group>
    <layout>hbox</layout>

    <text>
      <label>Force:</label>
    </text>

    <slider>
      <row>0</row>
      <col>2</col>
      <min>-40000</min>
      <max>40000</max>
      <property>/sim/model/pushback/magnitude</property>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </slider>

  </group>

  </group>

</PropertyList>