Enable Action in navigator popup when nothing is selected

Question

I have added an option in eclipse cnf as mentioned below:

<extension
     point="org.eclipse.ui.popupMenus">
  <objectContribution
        adaptable="true"
        objectClass="org.eclipse.core.resources.IProject"
        nameFilter="*"
        id="RemoteSync.contribution1">
     <action
           label="Enable RemoteSync"
           class="remotesync.builder.ToggleNatureAction"
           menubarPath="additions"
           enablesFor="1"
           id="RemoteSync.addRemoveNatureAction"
           style="toggle">
     </action>
  </objectContribution>

Here enables for is set to 1. So it enables when 1 items is selected. But I want enable the action when nothing in the cnf is selected. What should be the value for enables for?

Answer 1

This can be obtained with: enablesFor="*"

You can know all possible values for 'enablesFor' and their meaning by hovering over the 'enablesFor' in the plugin editor in Eclipse.