Package edu.uci.ics.jung.visualization

Class FourPassImageShaper

java.lang.Object

edu.uci.ics.jung.visualization.FourPassImageShaper

public class FourPassImageShaper
extends java.lang.Object

Provides Supplier methods that, given a BufferedImage, an Image, or the fileName of an image, will return a java.awt.Shape that is the contiguous traced outline of the opaque part of the image. This could be used to define an image for use in a Vertex, where the shape used for picking and edge-arrow placement follows the opaque part of an image that has a transparent background. The methods try to detect lines in order to minimize points in the path

Constructor Summary

Constructors

Constructor	Description
FourPassImageShaper()

Method Summary

Modifier and Type	Method	Description
private static java.awt.Shape	bottomEdge(java.awt.image.BufferedImage image)	trace the bottom of the image
private static java.awt.geom.Point2D	detectLine(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2, java.awt.geom.Point2D p, java.awt.geom.Line2D line, java.awt.geom.GeneralPath path)	Checks to see if point p is on a line that passes thru points p1 and p2.
static java.awt.Shape	getShape(java.awt.image.BufferedImage image)
private static java.awt.Shape	leftEdge(java.awt.image.BufferedImage image)	trace the left side of the image
private static java.awt.Shape	rightEdge(java.awt.image.BufferedImage image)	trace the right side of the image
private static java.awt.Shape	topEdge(java.awt.image.BufferedImage image)	trace the top of the image

Methods inherited from class java.lang.Object

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

Constructor Detail

FourPassImageShaper

public FourPassImageShaper()

Method Detail

getShape

public static java.awt.Shape getShape(java.awt.image.BufferedImage image)

detectLine

private static java.awt.geom.Point2D detectLine(java.awt.geom.Point2D p1,
                                                java.awt.geom.Point2D p2,
                                                java.awt.geom.Point2D p,
                                                java.awt.geom.Line2D line,
                                                java.awt.geom.GeneralPath path)

Checks to see if point p is on a line that passes thru points p1 and p2. If p is on the line, extend the line segment so that it is from p1 to the location of p. If the point p is not on the line, update my shape with a line extending to the old p2 location, make the old p2 the new p1, and make p2 the old p

Parameters:

p1 -

p2 -

p -

line -

path -

Returns:

leftEdge

private static java.awt.Shape leftEdge(java.awt.image.BufferedImage image)

trace the left side of the image

Parameters:

image -

path -

Returns:

bottomEdge

private static java.awt.Shape bottomEdge(java.awt.image.BufferedImage image)

trace the bottom of the image

Parameters:

image -

path -

start -

Returns:

rightEdge

private static java.awt.Shape rightEdge(java.awt.image.BufferedImage image)

trace the right side of the image

Parameters:

image -

path -

start -

Returns:

topEdge

private static java.awt.Shape topEdge(java.awt.image.BufferedImage image)

trace the top of the image

Parameters:

image -

path -

start -

Returns: