protected void setup() {
VerticalLayout vl = new VerticalLayout();
vl.setWidth("300px");
TextArea areaUndefined = new TextArea();
areaUndefined.setSizeUndefined();
areaUndefined.setValue("Undefined height");
vl.addComponent(areaUndefined);
TextArea areaDefined = new TextArea();
areaDefined.setWidth("200px");
areaDefined.setValue("200px width");
vl.addComponent(areaDefined);
TextArea areaRelativeBottom = new TextArea();
areaRelativeBottom.setWidth("50%");
areaRelativeBottom.setValue("50% width, right align");
vl.addComponent(areaRelativeBottom);
vl.setComponentAlignment(areaRelativeBottom, Alignment.TOP_RIGHT);
TextArea areaRelativeCenter = new TextArea();
areaRelativeCenter.setWidth("50%");
areaRelativeCenter.setValue("50% width, center align");
vl.addComponent(areaRelativeCenter);
vl.setComponentAlignment(areaRelativeCenter, Alignment.TOP_CENTER);
TextArea areaRelativeTop = new TextArea();
areaRelativeTop.setWidth("50%");
areaRelativeTop.setValue("50% width, left align");
vl.addComponent(areaRelativeTop);
vl.setComponentAlignment(areaRelativeTop, Alignment.TOP_LEFT);
addComponent(vl);
}