Set value of a custom FormItem used as a filter editor property

[Hime]

Hello,

I would like to create a custom FormItem to use it as a filter editor property. This FormItem is supposed to be a TextItem with a COMBO_BOX PickerIcon. When a user click on the PickerIcon, it shows a TreeGrid just as if it was a SelectItem with a TreeGrid inside of it.
The problem is when I select a node in the TreeGrid, I would like to update the value of the TextItem, but it does not seem to work. Here is my code :

public class TreeItem extends TextItem implements FormItemClickHandler, SelectionChangedHandler
{
    private TreeGrid   treeGrid;
    private PickerIcon icon;

    public TreeItem()
    {
        TreeGridField field1 = new TreeGridField("name");

        TreeNode node1 = new TreeNode();
        node1.setAttribute("name", "name1");
        TreeNode node2 = new TreeNode();
        node2.setAttribute("name", "name2");

        Tree tree = new Tree();
        tree.setRoot(new TreeNode());
        tree.setModelType(TreeModelType.PARENT);
        tree.add(node1, tree.getRoot());
        tree.add(node2, node1);

        treeGrid = new TreeGrid();
        treeGrid.setFields(field1);
        treeGrid.setData(tree);
        treeGrid.setSelectionAppearance(SelectionAppearance.CHECKBOX);
        treeGrid.setShowSelectedStyle(false);
        treeGrid.setShowPartialSelection(true);
        treeGrid.setWidth100();
        treeGrid.setShowHeader(false);
        treeGrid.setPosition(Positioning.ABSOLUTE);
        treeGrid.addSelectionChangedHandler(this);
        treeGrid.hide();

        icon = new PickerIcon(PickerIcon.COMBO_BOX);
        icon.addFormItemClickHandler(this);

        setIcons(icon);
    }

    @Override
    public void onFormItemClick(FormItemIconClickEvent event)
    {
        if (treeGrid.isVisible())
        {
            treeGrid.hide();
        }
        else
        {
            treeGrid.setLeft(event.getItem().getPageLeft());
            treeGrid.setTop(event.getItem().getPageTop() + event.getItem().getHeight());
            treeGrid.setWidth(event.getItem().getWidth());
            treeGrid.show();
        }
    }

    @Override
    public void onSelectionChanged(SelectionEvent event)
    {
        if (event.getSelection().length > 0)
        {
            StringBuilder builder = new StringBuilder();
            builder.append(event.getSelection()[0].getAttribute("name"));
            for (int i = 1; i < event.getSelection().length; i++)
            {
                builder.append(", ");
                builder.append(event.getSelection()[i].getAttribute("name"));
            }
            setValue(builder.toString());
        }
    }
}

The line "setValue(builder.toString());" does not work when I use my TreeItem as a filter editor property for a ListGrid whereas it works well when I use it as a field in a DynamicForm.
Thank you.

[Isomorphic]

Management of the criteria in the filter editor is very specialized, and won't just pick up a change to your form item's value. Instead, to apply new criteria to the filter editor, you'll need to use a call getFilterEditorCriteria(), modify the criteria, then re-apply it via setFilterEditorCriteria().