« XUL Reference

Example

<window id="controller-example" title="Controller Example" onload="init();"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

<script>
function init()
{
  var list = document.getElementById("theList");

  var listController = {
    supportsCommand : function(cmd){ return (cmd == "cmd_delete"); },
    isCommandEnabled : function(cmd){
      if (cmd == "cmd_delete") return (list.selectedItem != null);
      return false;
    },
    doCommand : function(cmd){
      list.removeItemAt(list.selectedIndex);
    },
    onEvent : function(evt){ }
  };

  list.controllers.appendController(listController);
}
</script>

<listbox id="theList">
  <listitem label="Ocean"/>
  <listitem label="Desert"/>
  <listitem label="Jungle"/>
  <listitem label="Swamp"/>
</listbox>

</window>