@Override
public void onOpen(OpenEvent<TreeItem> event) {
TreeItem item = event.getTarget();
currentlySelected = item;
if (item.getChild(0).getText().equals(DatasetWidget.LOADING)) {
CategorySerializable cat = (CategorySerializable) item.getUserObject();
Util.getRPCService().getCategories(cat.getID(), null, categoryCallback);
}
}
/** Set up the tree and the associated RPC. */
public void init() {
try {
Util.getRPCService().getCategories(null, null, categoryCallback);
} catch (RuntimeException e) {
// Catching this exception mainly to allow WindowBuilder to work without error
e.printStackTrace();
}
addOpenHandler(open);
addSelectionHandler(selection);
}
@Override
public void onESGFDatasetAdded(ESGFDatasetAddedEvent event) {
saveSelection = currentlySelected;
// This will cause the result to be added to the top of the tree...
currentlySelected = null;
// Clear the tree to re-add all the datasets in this session.
clear();
Util.getRPCService().getCategories(null, null, categoryCallback);
}
@Override
public void onSelection(SelectionEvent<TreeItem> event) {
TreeItem item = event.getSelectedItem();
currentlySelected = item;
TreeItem child = item.getChild(0);
if (child != null && child.getText().equals(DatasetWidget.LOADING)) {
CategorySerializable cat = (CategorySerializable) item.getUserObject();
Util.getRPCService().getCategories(cat.getID(), null, categoryCallback);
}
// Open the item. Work around double firing bug.
// http://code.google.com/p/google-web-toolkit/issues/detail?id=3660&q=Tree%20selection&colspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Stars
TreeItem selItem = event.getSelectedItem();
TreeItem parent = selItem.getParentItem();
selItem.getTree().setSelectedItem(parent, false); // null is ok
if (parent != null) parent.setSelected(false); // not compulsory
selItem.setState(!selItem.getState(), false);
}