Roger Whitcomb created PIVOT-933:
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Summary: Allow refusal to open a TreeView branch
Key: PIVOT-933
URL: https://issues.apache.org/jira/browse/PIVOT-933
Project: Pivot
Issue Type: Improvement
Components: wtk, wtk-terra
Affects Versions: 2.1
Environment: All
Reporter: Roger Whitcomb
Assignee: Roger Whitcomb
Priority: Minor
Fix For: 2.1
In some cases (i.e., doing lazy loading of contents of a tree branch) an error
might occur that precludes getting the information for the branch. In this
case it would be better to simply refuse to open the branch because the
information is inaccurate or not available, rather than show a (potentially
misleading) empty list.
This is a simple change to add a method to TreeViewBranchListener called
"previewBranchExpandedChange" that returns a Vote as to whether or not to
expand/collapse the branch, similarly to the way Rollups and Accordions work.
The Adapter will return Vote.APPROVE so (most) existing apps will continue to
work as before (unless they directly implement the TreeViewBranchListener
interface instead of subclassing the Adapter). Will also need to implement the
"branchExpandedChangeVetoed" method to be consistent (although there is
currently no use for it in the skin).
Adding this in a point release (2.1) instead of a maintenance release (2.0.4)
because the API is changing.
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