Use 'node.isLeaf()' in tree2 to decide whether to display the navigation icon
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Key: MYFACES-350
URL: http://issues.apache.org/jira/browse/MYFACES-350
Project: MyFaces
Type: Improvement
Versions: Nightly Build
Environment: IBM RAS using MyFaces JSF implementation
Reporter: Brendan Conner
Priority: Minor
I would like to suggest the following enhancement to Tree2 that would make it
more amenable to grabbing data "on the fly" as the user is expanding nodes.
Here's the problem:
Currently, Tree2 does not display the + navigation icon if the number of child
nodes is zero, regardless of whether there are children yet to be fetched.
What I'd like to have happen is that the + navigation icon is displayed only if
the node is not a leaf node, regardless of whether there are currently child
nodes.
In other words, I would like to have the following line in
HtmlRenderer.encodeNavigation() changed from:
bitMask += (node.getChildCount()>0) ? CHILDREN : NOTHING;
to:
bitMask += (node.isLeaf) ? CHILDREN : NOTHING;
If we make this change, then the application developer has more control over
whether the + navigation symbol appears, since the application developer can
override the isLeaf() method in the node itself.
Currently, the workaround is to override the node's getChildCount() method to
return the number of records *expected* if the user were to request the fetch.
However, the "expected" number of records is not always known, so, in these
cases, getChildCount() would have to be coded to return an arbitrary number
greater than zero, which is kind of a kluge.
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