fgdata/gui/dialogs/airports.xml

<?xml version="1.0"?>
<PropertyList>
  <name>airports</name>
  <layout>vbox</layout>

  <text>
    <label>Select an Airport</label>
  </text>

  <!-- The airport list widget appears to have a bug with layout; it 
       fails to draw within the x/y/width/height it is given. -->
  <airport-list>
    <pref-width>440</pref-width>
    <pref-height>360</pref-height>
    <property>/sim/presets/airport-id</property>
  </airport-list>

  <group>
    <layout>hbox</layout>
    <default-padding>10</default-padding>
    <empty><stretch>true</stretch></empty>

    <button>
      <legend>OK</legend>
      <equal>true</equal>
      <default>true</default>
      <binding>
	<command>property-assign</command>
	<property>/sim/presets/longitude-deg</property>
	<value type="double">-9999</value>
      </binding>
      <binding>
	<command>property-assign</command>
	<property>/sim/presets/latitude-deg</property>
	<value type="double">-9999</value>
      </binding>
      <binding>
	<command>property-assign</command>
	<property>/sim/presets/altitude-ft</property>
	<value type="double">-9999</value>
      </binding>
      <binding>
	<command>dialog-apply</command>
      </binding>
      <binding>
	<command>presets-commit</command>
      </binding>
    </button>

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

    <button>
      <legend>Cancel</legend>
      <equal>true</equal>
      <binding>
	<command>dialog-close</command>
      </binding>
    </button>

    <empty><stretch>true</stretch></empty>
  </group>
</PropertyList>