Eclipse Form程序设计指南（3）

              ExpandableComposite ec = toolkit.createExpandableComposite(body,

                ExpandableComposite.TREE_NODE

                       | ExpandableComposite.CLIENT_INDENT);

              ec.setText("Expandable Composite title");

              String ctext = "We will now create a somewhat long text so that "

                + "we can use it as content for the expandable composite. "

                + "Expandable composite is used to hide or show the text using the "

                + "toggle control";

              Label client = toolkit.createLabel(ec, ctext, SWT.WRAP);

              ec.setClient(client);

              td = new TableWrapData();

              td.colspan = 2;

              ec.setLayoutData(td);

              ec.addExpansionListener(new ExpansionAdapter() {

                public void expansionStateChanged(ExpansionEvent e) {

                       form.reflow(true);

                }

              });