No hierarchy in TreeTable?

Vaadin 6 / 7 / 8
1

I recently got some help on how to populate my treetable given a List of beans. Here are the two relevant methods for populating the treetable:

private HorizontalLayout createNode (String name, boolean isChecked) {
    HorizontalLayout layout = new HorizontalLayout();
    
    layout.addComponent(new CheckBox(null, isChecked));
    layout.addComponent(new Label(name));
    
    return layout;
}

private void populateTreeTable (final TreeTable treeTable) {
    // Get a list of jobs on a particular date.
    LocalDate tempDate = new LocalDate(2016, 03, 01); // Remove this after we have the program get the current date.
    List<Job> jobsList = null;
    try {
        jobsList = JobManager.getJobsByDate(tempDate);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
    if (jobsList != null) {
        
        for (Job j : jobsList) {
            // Go through each item in the Jobs list and add it
            // (along with all of its OrderDetail items) to the TreeTable.
//                boolean firstOrderCompleted = j.getOrderDetailList().get(0).getItemCompleted() != null; // The first OrderDetail's completion status.
            final Object jobId = treeTable.addItem(new Object[] {createNode(j.getCustomerName(), j.getJobCompleted() != null), j.getJobId(),
                    "", null, null, null}, null);
            for (OrderDetail od : j.getOrderDetailList()) {
                final Object odId = treeTable.addItem(new Object[] {createNode(od.getProductId(), od.getItemCompleted() != null), od.getProductDetail(),
                        od.getPrintType().getValue(), od.getNumColors(), od.getQuantity(), (od.getNumColors() * od.getQuantity())}, null);
                treeTable.setParent(odId, jobId);
                treeTable.setChildrenAllowed(odId, false);
                treeTable.setCollapsed(odId, false);
            }
            treeTable.setCollapsed(jobId, false);
        }
        
    }
}

Line 32 clearly shows that I am setting an OrderDetail item to be the child of the Job item. Yet I do not get any hierarchy in the TreeTable. They are all still just children of null, presumably:

What am I missing?

2

I might be totally wrong since I haven’t tested this, but on line 28 you are inserting null as the itemId (last param). If you input something unique there, does it work?

3

According to Table’s javadoc, if I leave the last parameter as null, then a new id is automatically assigned to the row (and returned):

addItem

public java.lang.Object addItem(java.lang.Object cells,
                                java.lang.Object itemId)
                         throws java.lang.UnsupportedOperationException

Adds the new row to table and fill the visible cells (except generated columns) with given values.

Parameters:
    cells - the Object array that is used for filling the visible cells new row. The types must be settable to visible column property types.
    itemId - the Id the new row. If null, a new id is automatically assigned. If given, the table cannot already have a item with given id.

Returns:
    Returns item id for the new row. Returns null if operation fails.

Throws:
java.lang.UnsupportedOperationException
4

Then I was totally wrong :slight_smile:

5

One interesting bit that may help someone to solve my dilemma: It seems the setParent() method is working, but there is still some issue with the heirarchy working. For example, when I comment-out lines 34 and 36 in my original post (un-setting the TreeTable’s branches as un-collapsed, thus making them collapsed), the OrderDetail items disappear. It’s as though they were parented to their respective Jobs (which they should be), and then those Jobs’ branches were collapsed:

However, as you can see, the arrows are not visible for expanding those branches (Jobs). So it seems that the TreeTable just doesn’t understand that it’s supposed to be hierarchical. Any thoughts?

6

At one time, I had tried to create a tri-state CheckBox, which required me to create a custom widgetset. Somewhere along the way, I’m sure I somehow broke the indention and triangle image references. Frustration with not being able to figure out where the problem lies led me to just create the entire project again.

I created a new project (this time without creating a custom widgetset for now) and mostly just copy-pasted the code from the original project. Voilà, the treetable looks as it is supposed to. So this barrier has been removed for now; I can focus on the next one (out of several dozen). I’ll likely post something about it tomorrow.