y.layout.router
Class ReducedSphereOfActionStage

java.lang.Object
  y.layout.AbstractLayoutStage
      y.layout.router.ReducedSphereOfActionStage

All Implemented Interfaces:

Layouter, LayoutStage

public class ReducedSphereOfActionStage
extends AbstractLayoutStage

Performance optimization stage for OrthogonalEdgeRouter. This layout stage is applicable when only a subset of the edges in the input graph should be routed orthogonally.

Field Summary

Fields inherited from interface y.layout.Layouter

EDGE_ID_DPKEY, NODE_ID_DPKEY, SELECTED_EDGES, SELECTED_NODES

Constructor Summary

ReducedSphereOfActionStage(Layouter coreLayouter)
Creates a new instance of ReducedSphereOfActionStage.

Method Summary

boolean	canLayout(LayoutGraph graph) Returns true iff the given graph can be laid out by this algorithm.
void	doLayout(LayoutGraph graph) Assigns orthogonal edge paths to the selected edges of a graph, efficiently.
int	getActivationThreshold() Returns the activation threshold for this class.
void	setActivationThreshold(int threshold) Sets the activation threshold for this class.

Methods inherited from class y.layout.AbstractLayoutStage

canLayoutCore, doLayoutCore, getCoreLayouter, setCoreLayouter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReducedSphereOfActionStage

public ReducedSphereOfActionStage(Layouter coreLayouter)

Creates a new instance of ReducedSphereOfActionStage.

Parameters:

coreLayouter - the core layouter invoked by this stage. The coreLayouter must contain an instance of OrthogonalEdgeRouter its layout pipeline.

Method Detail

canLayout

public boolean canLayout(LayoutGraph graph)

Description copied from interface: Layouter

Returns true iff the given graph can be laid out by this algorithm. Calling doLayout with the given graph as its argument will only success if this method returns true.

doLayout

public void doLayout(LayoutGraph graph)

Assigns orthogonal edge paths to the selected edges of a graph, efficiently. Note that this stage will only have an optimizing effect if not all edges of the graph should be routed.

See Also:

OrthogonalEdgeRouter.setSphereOfAction(byte)

Precondition:

a LayoutStage of getCoreLayouter() must be an instance of OrthogonalEdgeRouter.

setActivationThreshold

public void setActivationThreshold(int threshold)

Sets the activation threshold for this class. This stage will perform its optimization step only if the sum of the edges and nodes of the input graph is bigger than the activation threshold. By default the threshold value is set to 200.

getActivationThreshold

public int getActivationThreshold()

Returns the activation threshold for this class.

See Also:

setActivationThreshold(int)