SWT ProgressMonitorDialog 与 Job

As far as I can tell from testing, ProgressMonitorDialog correctly displays the progress bar to the user, and can be made modal using the following code below. However there are no hooks to shrink it to the bottom-right of the status bar. The code kind of looks like this:

try {
    ProgressMonitorDialog pmd = new ProgressMonitorDialog(shell){
        @Override
        protected void setShellStyle(int newShellStyle) {           
            super.setShellStyle(SWT.CLOSE | SWT.MODELESS| 
                SWT.BORDER | SWT.TITLE);
            setBlockOnOpen(false);
        }  
    };
    pmd.run(true, true, new MyOperation());
} catch (final InvocationTargetException e) {
    MessageDialog.openError(shell, "Error", e.getMessage());
} catch (final InterruptedException e) {
    MessageDialog.openInformation(shell, "Cancelled", e.getMessage());
}

class MyOperation implements IRunnableWithProgress {
    @Override
    public void run(final IProgressMonitor monitor) throws 
      InvocationTargetException, InterruptedException {
        monitor.beginTask("start task", 10);

        // time consuming work here
        doExpensiveWork(monitor);

        monitor.done();
    }

当我使用 Job 进行测试时，作业按预期运行，但我没有得到视觉反馈.我的代码是这样的:

final ProgressBar progressBar = new ProgressBar(shell, SWT.SMOOTH);
progressBar.setBounds(100, 10, 200, 20);

// Setting the progress monitor
final IJobManager manager = Job.getJobManager();

final IProgressMonitor p = new IProgressMonitor() {

    @Override
    public void worked(final int work) {
        sync.syncExec(new Runnable() {
        @Override
        public void run() {
            progressBar.setSelection(progressBar.getSelection() + work);
        }
    });
    //....
}

Job job = new Job("test") {

    @Override
    protected IStatus run(IProgressMonitor monitor) {
        monitor.beginTask("start task", 10);

        // time consuming work here
        doExpensiveWork(monitor);
        // sync with UI
        syncWithUI();

        return Status.OK_STATUS;
    }

};
job.setUser(true);
job.schedule();

IWorkbenchWindowConfigurer configurer = getWindowConfigurer();
setShowProgressIndicator(true);