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https://issues.apache.org/jira/browse/PIVOT-933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roger Whitcomb resolved PIVOT-933.
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Resolution: Fixed
Committed the patch to trunk:
Sending wtk\src\org\apache\pivot\wtk\TreeView.java
Sending wtk\src\org\apache\pivot\wtk\TreeViewBranchListener.java
Sending
wtk-terra\src\org\apache\pivot\wtk\skin\terra\TerraTreeViewSkin.java
Transmitting file data ...
Committed revision 1556748.
> 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
>
> Attachments: branch.patch
>
>
> 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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