public void onOpen(OpenEvent<TreeItem> event) {
TreeItem node = event.getTarget();
Object userObject = node.getUserObject();
if (userObject != null
&& userObject instanceof String
&& "rootNode".equals((String) userObject)) {
node.removeItems();
setupPackageNode(node);
}
}
public void onSuccess(Object result) {
CategorySerializable[] cats = (CategorySerializable[]) result;
if (cats != null && cats.length > 0) {
if (currentlySelected == null) {
for (int i = 0; i < cats.length; i++) {
CategorySerializable cat = cats[i];
String children = cat.getAttributes().get("children");
boolean empty = false;
if (children != null && children.equals("none")) empty = true;
if (applyFilters(cat) && !empty) {
TreeItem item = new TreeItem();
item.addItem(
new SafeHtmlBuilder().appendEscaped(DatasetWidget.LOADING).toSafeHtml());
InnerItem inner = new InnerItem(cat);
item.setWidget(inner);
item.setUserObject(cat);
addItem(item);
}
}
} else {
for (int i = 0; i < cats.length; i++) {
CategorySerializable cat = cats[i];
if (cat.isCategoryChildren()) {
String name = cat.getName();
TreeItem item;
if (i == 0) {
item = currentlySelected.getChild(0);
} else {
item = new TreeItem();
}
item.addItem(
new SafeHtmlBuilder().appendEscaped(DatasetWidget.LOADING).toSafeHtml());
InnerItem inner = new InnerItem(cat);
item.setWidget(inner);
item.setUserObject(cat);
if (i > 0) {
currentlySelected.addItem(item);
}
} else if (cat.isVariableChildren()) {
// Must have variable children...
TreeItem item = currentlySelected.getChild(0);
if (cat.hasMultipleDatasets()) {
DatasetSerializable[] dses = cat.getDatasetSerializableArray();
DatasetSerializable ds = dses[0];
VariableSerializable[] vars = ds.getVariablesSerializable();
currentlySelected.removeItems();
for (int j = 0; j < dses.length; j++) {
ds = dses[j];
vars = ds.getVariablesSerializable();
loadItem(vars);
}
} else {
DatasetSerializable ds = cat.getDatasetSerializable();
VariableSerializable[] vars = ds.getVariablesSerializable();
currentlySelected.removeItems();
loadItem(vars);
}
}
}
}
} else {
// A category was selected, but it came back empty...
if (currentlySelected != null) {
TreeItem item = currentlySelected.getChild(0);
item.setText("No data sets found.");
}
}
if (saveSelection != null) {
currentlySelected = saveSelection;
saveSelection = null;
}
}