Recursive layout
JViews Graph Layout for Eclipse supports GEF nested graphs, that
is, it can render graphs containing nodes that are graphs.
Important
Important
The GMF compartments are partially supported by JViews Graph Layout for Eclipse; recursive layouts
and intergraph links are not yet operational with GMF. The Recursive
mode of the Hierarchical layouts section is only applicable to GEF
users.
Label layout
If the recursive layout mode is enabled, the hierarchical
layout can also place the node and link labels. This is useful, because
placing labels after a recursive layout may change the bounds of subgraphs
again, and hence would require the hierarchical layout to rerun. Therefore,
an annealing label layout is integrated into the hierarchical layout
which is executed during the recursive layout mode.I
A graph that is a node in another graph is called a subgraph.
Links that connect nodes of different subgraphs are called intergraph
links. In Recursive hierarchical layout on nested graph with
polyline link style, all red links are intergraph links
and all black links are normal links. This is explained in detail
in Nested layouts.
The hierarchical layout can treat a nested graph at once,
placing all nested nodes and routing all links including the intergraph
links. It can even place the labels in the nested graph.
To enable the recursive mode:
In Java™
Use this method:
void setRecursiveLayoutMode(boolean enable);
and call
performLayout with
the third parameter set to true in the
following way:layout.performLayout(force, redraw, true);
Label layout
If the recursive layout mode is enabled, the hierarchical
layout can also place the node and link labels. This is useful, because
placing labels after a recursive layout may change the bounds of subgraphs
again, and hence would require the hierarchical layout to rerun. Therefore,
an annealing label layout is integrated into the hierarchical layout
which is executed during the recursive layout mode.
When the recursive layout mode is used, the label layout
is automatically used. It is recommended to keep it enabled if nodes
or links in subgraphs have labels. In can be disabled if there are
no labels.
To disable the label layout:
In Java
layout.setLabelLayoutEnabledDuringRecursiveLayoutMode(false);
For more details on how to use the IlvAnnealingLabelLayout see Annealing label layout. For more
details on how to use the IlvRecursiveLayout see Recursive layout.
