PARMmenu.xml

<?xml version="1.0" encoding="UTF-8"?>

<!--

-->

<menuDocument>
    <!-- menuDocument can only contain 1 menu element, whose id is 
         implicitly "root_menu"
      -->
    <menu>

      <!-- External Editor -->
      
      <addScriptItem id="open_external_editor">
        <label>Edit in External Editor</label>
        <parent>expression_menu</parent>
<!--         <insertAfter>edit_expression</insertAfter> -->
        <context>
          <expression>
  <![CDATA[
try:
  from HoudiniExprEditor import ParmWatcher
  return ParmWatcher.is_valid_parm(kwargs["parms"][0])
except:
  return False]]></expression>
        </context>
        <scriptCode>
          <![CDATA[
from HoudiniExprEditor import ParmWatcher
try:
  reload(ParmWatcher)
except NameError:
  from importlib import reload
  reload(ParmWatcher)
ParmWatcher.add_watcher(kwargs["parms"][0])]]>
        </scriptCode>
      </addScriptItem>

      <!-- Remove watcher -->

      <addScriptItem id="remove_file_watcher">
        <label>Remove File Watcher</label>
        <parent>expression_menu</parent>
<!--         <insertAfter>open_external_editor</insertAfter> -->
        <context>
          <expression>
            <![CDATA[
try:
  from HoudiniExprEditor import ParmWatcher
  return ParmWatcher.parm_has_watcher(kwargs["parms"][0])
except:
  return False]]>
          </expression>
        </context>
        <scriptCode>
          <![CDATA[
from HoudiniExprEditor import ParmWatcher
try:
  reload(ParmWatcher)
except NameError:
  from importlib import reload
  reload(ParmWatcher)
ParmWatcher.remove_file_watched(kwargs["parms"][0])]]>
        </scriptCode>
      </addScriptItem>

    </menu>
</menuDocument>