set background color to SWT composites recursive

ColorSubComposites.java

  private void colorSubComposites(Composite co, int color) {
    Control [] controls = co.getChildren();
    co.setBackground(getShell().getDisplay().getSystemColor(color));
    for(Control control : controls) {
      if(control instanceof Composite)
        colorSubComposites((Composite)control, color);
    }
  }

  // USAGE: colorSubComposites(co, SWT.COLOR_RED);