y.layout
Class MinNodeSizeStage

java.lang.Object
  y.layout.AbstractLayoutStage
      y.layout.MinNodeSizeStage

All Implemented Interfaces:

Layouter, LayoutStage

public class MinNodeSizeStage
extends AbstractLayoutStage

MinNodeSizeStage enforces a given minimum width/height of the nodes of a graph during the layout process. It temporarily enlarges nodes whose width/height is below the specified minimum values.

This LayoutStage is especially useful to prevent that the core layout algorithm has to handle zero-sized nodes or nodes with negative sizes.

Field Summary

Fields inherited from interface y.layout.Layouter

EDGE_ID_DPKEY, NODE_ID_DPKEY, NODE_TYPE_DPKEY, SELECTED_EDGES, SELECTED_NODES

Constructor Summary

MinNodeSizeStage(Layouter coreLayouter)
Creates a new MinNodeSizeStage instance using the given core layout algorithm.

MinNodeSizeStage(Layouter coreLayouter, double minWidth, double minHeight)
Creates a new MinNodeSizeStage instance using the given core layout algorithm along with a specific minimum width and height for the nodes.

Method Summary

boolean	canLayout(LayoutGraph graph) Accepts all graphs that can be handled by the core layout algorithm.
void	doLayout(LayoutGraph graph) Resizes all nodes that are smaller than the specified minimum size to that minimum size, executes the core layout algorithm and restores the original sizes afterwards.

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

MinNodeSizeStage

public MinNodeSizeStage(Layouter coreLayouter,
                        double minWidth,
                        double minHeight)

Creates a new MinNodeSizeStage instance using the given core layout algorithm along with a specific minimum width and height for the nodes.

Parameters:

coreLayouter - the core layout routine

minWidth - the minimum width of nodes that should be enforced

minHeight - the minimum height of nodes that should be enforced

MinNodeSizeStage

public MinNodeSizeStage(Layouter coreLayouter)

Creates a new MinNodeSizeStage instance using the given core layout algorithm.

The nodes will be enlarged to be at least 1 wide and 1 high.

Parameters:

coreLayouter - the core routine

Method Detail

canLayout

public boolean canLayout(LayoutGraph graph)

Accepts all graphs that can be handled by the core layout algorithm.

If there is no core layout algorithm, all graphs are accepted.

Parameters:

graph - the input graph

Returns:

true if there is no core layout algorithm or the core layout algorithm accepts the graph, false otherwise

See Also:

Layouter.doLayout(LayoutGraph)

doLayout

public void doLayout(LayoutGraph graph)

Resizes all nodes that are smaller than the specified minimum size to that minimum size, executes the core layout algorithm and restores the original sizes afterwards.

Parameters:

graph - the input graph

See Also:

Layouter.canLayout(LayoutGraph)