fgdata/gui/dialogs/sound.xml

<?xml version="1.0"?>

<!-- Sound control dialog -->

<PropertyList>
  <name>sound-dialog</name>
  <modal>false</modal>
  <width>400</width>
  <layout>vbox</layout>

  <text>
    <label>Sound Configuration</label>
  </text>

  <hrule/>

  <text>
   <halign>fill</halign>
   <label>Sound Device:</label>
  </text>

  <combo>
    <name>source-selection</name>
    <halign>fill</halign>
    <stretch>true</stretch>
    <property>sim/gui/dialogs/sound-dialog/source-selection</property>
    <binding>
      <command>dialog-apply</command>
      <object-name>source-selection</object-name>
    </binding>
    <binding>
      <command>dialog-update</command>
      <object-name>metar</object-name>
    </binding>
  </combo>

  <group>
    <layout>hbox</layout>
    <halign>left</halign>

    <empty><width>10</width></empty>

    <text>
      <label>Enabled</label>
    </text>

    <text>
      <label>Volume</label>
    </text>
  </group>

  <group>
    <layout>hbox</layout>
    <halign>left</halign>

    <empty><width>10</width></empty>

    <checkbox>
      <property>/sim/sound/enabled</property>
      <label>Master</label>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </checkbox>

    <slider>
      <height>25</height>
      <property>/sim/sound/volume</property>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </slider>
  </group>

  <group>
    <layout>hbox</layout>
    <halign>left</halign>

    <empty><width>10</width></empty>

    <checkbox>
      <property>/sim/sound/effects/enabled</property>
      <label>Effects</label>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </checkbox>

    <slider>
      <height>25</height>
      <property>/sim/sound/effects/volume</property>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </slider>
  </group>

  <group>
    <layout>hbox</layout>
    <halign>left</halign>

    <empty><width>10</width></empty>

    <checkbox>
      <property>/sim/sound/avionics/enabled</property>
      <label>Avionics</label>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </checkbox>

    <slider>
      <height>25</height>
      <property>/sim/sound/avionics/volume</property>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </slider>
  </group>

  <group>
    <layout>hbox</layout>
    <halign>left</halign>

    <empty><width>10</width></empty>
    
    <checkbox>
      <property>/sim/sound/chatter/enabled</property>
      <label>Chatter</label>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </checkbox>

    <slider>
      <height>25</height>
      <property>/sim/sound/chatter/volume</property>
      <binding>
        <command>dialog-apply</command>
      </binding>
    </slider>
  </group>

  <group>
    <layout>hbox</layout>
    <default-padding>10</default-padding>
    <button>
      <legend>Apply</legend>
      <default>true</default>
      <key>Enter</key>
      <binding>
        <command>nasal</command>
        <script>apply()</script>
      </binding>
      <binding>
        <command>dialog-close</command>
      </binding>
    </button>
  </group>

  <nasal>
    <open><![CDATA[
      var dlg_root = cmdarg();

      var findElementByName = func(rootN, name) {
        foreach( var child; rootN.getChildren() ) {
          var n = child.getNode( "name" );
          if( n != nil and n.getValue() == name )
            return child;
          var f = findElementByName(child,name);
          if( f != nil ) return f;
        }
        return nil;
      };

      # fill the sounde device combo box
      var combo = findElementByName( dlg_root, "source-selection" );
      var wsn = props.globals.getNode( "/sim/sound/devices" );
      if( wsn != nil ) {
        var devices = wsn.getChildren("device");
        forindex (var i; devices )
          combo.getChild("value", i, 1).setValue(devices[i].getValue());
      }

      var apply = func {
        var device = getprop("sim/gui/dialogs/sound-dialog/source-selection");
        setprop( "/sim/sound/device", device);
      }

      # initialization
      var default_device = getprop("/sim/sound/device");
      setprop( "sim/gui/dialogs/sound-dialog/source-selection", default_device);

    ]]></open>
  </nasal>

</PropertyList>