How to use

update

method

in

org.eclipse.jdt.internal.ui.javaeditor.ToggleBreadcrumbAction

/**
 * Constructs and updates the action.
 *
 * @param page the workbench page
 * @param inContextMenu <code>true</code> iff this action is shown in the context menu of a breadcrumb
 * 
 * @since 3.7
 */
public ToggleBreadcrumbAction(IWorkbenchPage page, boolean inContextMenu) {
  super(JavaEditorMessages.getBundleForConstructedKeys(),
      inContextMenu ? "ToggleBreadcrumbAction.Hide." : "ToggleBreadcrumbAction.", //$NON-NLS-1$ //$NON-NLS-2$
      inContextMenu ? IAction.AS_PUSH_BUTTON : IAction.AS_CHECK_BOX);
  
  PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.TOGGLE_BREADCRUMB_ACTION);
  fPage= page;
  if (!inContextMenu) {
    JavaPluginImages.setToolImageDescriptors(this, "toggle_breadcrumb.png"); //$NON-NLS-1$
    fPage.getWorkbenchWindow().addPerspectiveListener(this);
  }
  update();
}

/**
 * Constructs and updates the action.
 *
 * @param page the workbench page
 * @param inContextMenu <code>true</code> iff this action is shown in the context menu of a breadcrumb
 * 
 * @since 3.7
 */
public ToggleBreadcrumbAction(IWorkbenchPage page, boolean inContextMenu) {
  super(JavaEditorMessages.getBundleForConstructedKeys(),
      inContextMenu ? "ToggleBreadcrumbAction.Hide." : "ToggleBreadcrumbAction.", //$NON-NLS-1$ //$NON-NLS-2$
      inContextMenu ? IAction.AS_PUSH_BUTTON : IAction.AS_CHECK_BOX);
  
  PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.TOGGLE_BREADCRUMB_ACTION);
  fPage= page;
  if (!inContextMenu) {
    JavaPluginImages.setToolImageDescriptors(this, "toggle_breadcrumb.png"); //$NON-NLS-1$
    fPage.getWorkbenchWindow().addPerspectiveListener(this);
  }
  update();
}