How to use

handleDispose

method

in

org.eclipse.jface.text.TextViewer

  @Override
  public void widgetDisposed(DisposeEvent e) {
    fDisposedControl= getControl();
    handleDispose();
  }
}

@Override
protected void handleDispose() {
  unconfigure();
  disposeVisualAnnotationModel();
  fVerticalRuler= null;
  fOverviewRuler= null;
  // http://dev.eclipse.org/bugs/show_bug.cgi?id=15300
  fComposite= null;
  super.handleDispose();
}

@Override
protected void handleDispose() {
  unconfigure();
  disposeVisualAnnotationModel();
  fVerticalRuler= null;
  fOverviewRuler= null;
  // http://dev.eclipse.org/bugs/show_bug.cgi?id=15300
  fComposite= null;
  super.handleDispose();
}

@Override
protected void handleDispose() {
  if (formatJob != null) {
    formatJob.cancel();
    formatJob = null;
  }
  Activator.getDefault().getPreferenceStore()
      .removePropertyChangeListener(listener);
  if (refsChangedListener != null)
    refsChangedListener.remove();
  refsChangedListener = null;
  super.handleDispose();
}

e -> {
  fDisposedControl= getControl();
  handleDispose();