@Override
protected void setup() {
final Tree t = new Tree(
"Tree with criteria from AbstractSelect (OverItem, ContainsItem). Foo can be dragged anywhere, anything can be dropped on Foo or Bar. Bar5 subtree is also valid drop target.");
final HierarchicalContainer idx = new HierarchicalContainer();
t.setContainerDataSource(idx);
t.addItem("Foo");
t.addItem("Bar");
t.addItem("Bar1");
t.addItem("Bar2");
t.addItem("Bar3");
t.addItem("Bar4");
t.addItem("Bar5");
t.addItem("Child");
t.setParent("Child", "Foo");
t.setSizeFull();
t.setDragMode(TreeDragMode.NODE);
/*
* Moves items in tree (and could work in Table too). Also supports
* "building" tree.
*
* TODO fix algorithm, broken in some cases.
*/
DropHandler itemSorter = new DropHandler() {
@SuppressWarnings("unused")
private void populateSubTree(HierarchicalContainer idx,
HierarchicalContainer subtree, Object itemId) {
Collection<?> children = subtree.getChildren(itemId);
if (children != null) {
for (Object childId : children) {
Item addItem = idx.addItem(childId);
if (addItem != null) {
// did not exist, populate properties
Item item = subtree.getItem(itemId);
Collection<?> itemPropertyIds = item
.getItemPropertyIds();
for (Object propId : itemPropertyIds) {
addItem.getItemProperty(propId)
.setValue(
item.getItemProperty(propId)
.getValue());
}
}
idx.setParent(childId, itemId);
populateSubTree(idx, subtree, childId);
}
}
}
@SuppressWarnings("unused")
private HierarchicalContainer getSubTree(HierarchicalContainer idx,
Object itemId) {
HierarchicalContainer hierarchicalContainer = new HierarchicalContainer();
Collection<?> containerPropertyIds = idx
.getContainerPropertyIds();
for (Object object : containerPropertyIds) {
hierarchicalContainer.addContainerProperty(object,
idx.getType(object), null);
}
hierarchicalContainer.addItem(itemId);
copyChildren(idx, hierarchicalContainer, itemId);
return hierarchicalContainer;
}
private void copyChildren(HierarchicalContainer source,