org.jgraph.graph
Class PortView

java.lang.Object
  org.jgraph.graph.AbstractCellView
      org.jgraph.graph.PortView

All Implemented Interfaces:

Serializable, CellView

public class PortView
extends AbstractCellView

The default implementation of a port view.

Version:

1.0 1/1/02

Author:

Gaudenz Alder

See Also:

Serialized Form

Field Summary

protected CellView	lastParent Cache of the last valid parent.
static PortRenderer	renderer Renderer for the class.
protected static int	size Default size for all ports is 6.

Fields inherited from class org.jgraph.graph.AbstractCellView

allAttributes, attributes, cell, cellEditor, childViews, graph, mapper, parent

Constructor Summary

PortView(Object cell, JGraph graph, CellMapper mapper)
Constructs a view that holds a reference to the specified cell, anchor and parent vertex.

Method Summary

Rectangle	getBounds() Returns the bounds for the port view.
protected Point	getEdgePoint(EdgeView view, int index) Returns the point of edge at index index.
CellHandle	getHandle(GraphContext context) Returns null.
Point	getLocation(EdgeView edge) Returns the point that the port represents with respect to edge.
protected Point	getNextPoint(EdgeView edge) Returns the point that is closest to the port view on edge.
CellView	getParentView() This method ensures a non-null value.
CellViewRenderer	getRenderer() Returns a renderer for the class.

Methods inherited from class org.jgraph.graph.AbstractCellView

childUpdated, getAllAttributes, getAttributes, getBounds, getCell, getChildViews, getDescendantViews, getEditor, getGraph, getMapper, getModel, getRendererComponent, intersects, isLeaf, refresh, removeFromParent, scale, setAttributes, setBounds, translate, update, updateAllAttributes

Methods inherited from class java.lang.Object

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

Field Detail

size

protected static int size

Default size for all ports is 6.

renderer

public static PortRenderer renderer

Renderer for the class.

lastParent

protected transient CellView lastParent

Cache of the last valid parent. //FIX: Better solution?

Constructor Detail

PortView

public PortView(Object cell,
                JGraph graph,
                CellMapper mapper)

Constructs a view that holds a reference to the specified cell, anchor and parent vertex.

Parameters:

cell - reference to the cell in the model

graph -

mapper -

Method Detail

getParentView

public CellView getParentView()

This method ensures a non-null value. If the super method returns null then the last valid parent is returned. Note: If a vertex is removed, all ports will be replaced in connected edges. The ports are replaced by the center point of the last valid vertex view.

Specified by:

getParentView in interface CellView

Overrides:

getParentView in class AbstractCellView

getBounds

public Rectangle getBounds()

Returns the bounds for the port view.

Specified by:

getBounds in interface CellView

Specified by:

getBounds in class AbstractCellView

getRenderer

public CellViewRenderer getRenderer()

Returns a renderer for the class.

Specified by:

getRenderer in class AbstractCellView

getHandle

public CellHandle getHandle(GraphContext context)

Returns null.

Specified by:

getHandle in interface CellView

Specified by:

getHandle in class AbstractCellView

getLocation

public Point getLocation(EdgeView edge)

Returns the point that the port represents with respect to edge. edge may be null.

getNextPoint

protected Point getNextPoint(EdgeView edge)

Returns the point that is closest to the port view on edge. Returns null if edge has less than 2 points.

getEdgePoint

protected Point getEdgePoint(EdgeView view,
                             int index)

Returns the point of edge at index index. Avoids calling getLocation on the opposite port of edge (possible infinite recursion).