Combining multiple and recursive layout

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Often, the Multiple Layout is used inside a Recursive Layout. For convenience, Rogue Wave® JViews provides a layout algorithm that combines both mechanisms: the Recursive Multiple Layout. This is a Recursive Layout (see Recursive layout) that uses an instance of Multiple Layout for each subgraph.

To apply a Tree Layout, a Link Layout, and an Annealing Label Layout recursively on a nested graph, you can use:

IlvRecursiveMultipleLayout layout = new IlvRecursiveMultipleLayout(
                                  new IlvTreeLayout(),
                                  new IlvLinkLayout(),
                                           new IlvAnnealingLabelLayout());

This is in principle the same as a Recursive Layout that has a Multiple Layout as a reference layout:

IlvRecursiveLayout layout = new IlvRecursiveLayout(
                            new IlvMultipleLayout(
                            new IlvTreeLayout(),
                            new IlvLinkLayout(),
                                   new IlvAnnealingLabelLayout()));

The Recursive Multiple Layout has a first and second graph layout instance per subgraph, and a label layout instance per subgraph. You access these instances by the following methods:

IlvGraphLayout getFirstGraphLayout(Object subgraph)

which returns the graph layout that is applied first to the subgraph.
IlvGraphLayout getSecondGraphLayout(Object subgraph)

which returns the graph layout that is applied secondly to the subgraph.
IlvLabelLayout getLabelLayout(Object subgraph)

which returns the label layout that is applied last to the subgraph.

If the subgraph parameter is null in these methods, the layout instances of the top-level graph are returned.

Current section

Multiple layout