Tuesday, February 14, 2006

New in JFace 3.2 M5: Virtual TreeViewer, and multiple equal elements

Two important enhancements were made to TreeViewer in 3.2 M5. I thought I should mention them somewhere - since they are not visible to end-users, the new and noteworthy document does not mention them:
  • Supporting elements that appear multiple times in a tree, as long as there are different parent paths - see bug 84314.
  • Support for SWT.VIRTUAL trees - see bug 112000. Note that all along, TreeViewer implemented lazy trees: the tree content provider's getChildren() method is only called when the user expands a node. The virtual tree viewer is helpful if there are lots of children per parent, or if it expensive to compute the information needed for each child.

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