AddNodesOnExpand.java

package com.vaadin.tests.components.treetable;

import com.vaadin.tests.components.TestBase;
import com.vaadin.v7.ui.Tree;
import com.vaadin.v7.ui.Tree.CollapseEvent;
import com.vaadin.v7.ui.Tree.ExpandEvent;
import com.vaadin.v7.ui.TreeTable;

public class AddNodesOnExpand extends TestBase {
    private TreeTable treetable;

    @Override
    public void setup() {
        treetable = new TreeTable();
        treetable.setImmediate(true);
        treetable.setWidth("100%");
        treetable.setHeight(null);
        treetable.setPageLength(0);
        treetable.addContainerProperty("foo", String.class, "");
        treetable.addListener(new Tree.ExpandListener() {
            @Override
            public void nodeExpand(ExpandEvent event) {
                Object openedItemId = event.getItemId();
                if (!treetable.hasChildren(openedItemId)) {
                    for (int j = 0; j < 3; j++) {
                        treetable.addItem(new String[] { "Subitem " + j },
                                openedItemId + "-" + j);
                        treetable.setParent(openedItemId + "-" + j,
                                openedItemId);
                    }
                }
            }
        });
        treetable.addListener(new Tree.CollapseListener() {
            @Override
            public void nodeCollapse(CollapseEvent event) {
                /* Uncomment this to "fix" the TreeTable */
                // orgTree.refreshRowCache();
            }
        });

        for (int i = 0; i < 3; i++) {
            treetable.addItem(new String[] { "Item " + i }, Integer.valueOf(i));
        }

        addComponent(treetable);
    }

    @Override
    protected String getDescription() {
        return "Expanding a node and then collapsing it should not cause scrollbars to appear";
    }

    @Override
    protected Integer getTicketNumber() {
        return Integer.valueOf(8041);
    }
}