import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.GridLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.LightweightSystem;
import org.eclipse.draw2d.RectangleFigure;
import org.eclipse.draw2d.ScrollPane;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;

public class ScrollPaneTest {

  private static final int COLUMN_COUNT = 50;
  private static final int FIGURE_COUNT = 500;

  public static void main(String args[]) {
    new ScrollPaneTest().process();
  }

  public void process() {
    Display d = Display.getDefault();
    final Shell shell = new Shell(d);

    // Comment this line for the scroll bars
    buildMenu(shell);

    LightweightSystem lws = new LightweightSystem(shell);

    final ScrollPane scrollPane = new ScrollPane();
    lws.setContents(scrollPane);

    final Figure contents = new Figure();
    GridLayout gridLayout = new GridLayout();
    gridLayout.numColumns = COLUMN_COUNT;
    contents.setLayoutManager(gridLayout);
    scrollPane.setContents(contents);

    for (int i = 0; i < FIGURE_COUNT; i++) {
      IFigure rectangleFigure = createFigure();
      contents.add(rectangleFigure);
    }

    shell.open();
    shell.setText("Example");
    Display display = Display.getDefault();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
  }

  IFigure createFigure() {
    RectangleFigure rectangleFigure = new RectangleFigure();
    rectangleFigure.setBackgroundColor(ColorConstants.darkBlue);
    rectangleFigure.setSize(300, 300);
    return rectangleFigure;
  }

  private void buildMenu(final Shell shell) {
    Menu menuBar = new Menu(shell, SWT.BAR);
    shell.setMenuBar(menuBar);

    MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
    fileItem.setText("&File");
    Menu fileSubmenu = new Menu(shell, SWT.DROP_DOWN);
    fileItem.setMenu(fileSubmenu);

    MenuItem exitMenuItem = new MenuItem(fileSubmenu, SWT.PUSH);
    exitMenuItem.setText("E&xit");
    exitMenuItem.addListener(SWT.Selection, new Listener() {
      @Override
      public void handleEvent(Event event) {
        shell.close();
      }
    });
  }
}