Group sorting and GroupsModelExt.group

asked 2009-09-02 17:25:05 +0800

cvarona
554 ● 1 ● 6

Hi,

I'm currently working on a GroupsModel/GroupsModelExt implementation in order to display our custom data models into zk listboxes and taking advantage of the grouping feature.

After implementing GroupsModelExt.sort I've run into difficulties with GroupsModelExt.group.

To start with, the javadoc is rather obscure as far as this method is concerned:

group

void group(java.util.Comparator cmpr,
           boolean ascending,
           int colIndex)

    Groups and sorts the data by the specified column. It only called when Listbox or Grid has the sort function. 

So I'd like to know:

1) What does "a listbox or grid has the sort function" mean?
2) When gets GroupModelExt.group invoked?
3) The sorting arrows only seem to trigger GroupsModelExt.sort. How can I trigger a GroupsModelExt.group? Should I set up a special component (e.g. a button) to perform that sorting?
4) How do GroupComparators fit into the whole vista?

If somebody could provide the answers to some of these questions I'd be most grateful

César Varona