com.mxgraph.util.svg

Class ExtendedGeneralPath

java.lang.Object

com.mxgraph.util.svg.ExtendedGeneralPath

All Implemented Interfaces:

java.awt.Shape, java.lang.Cloneable

public class ExtendedGeneralPath
extends java.lang.Object
implements java.awt.Shape, java.lang.Cloneable

The ExtendedGeneralPath class represents a geometric path constructed from straight lines, quadratic and cubic (Bezier) curves and elliptical arc. This class delegates lines and curves to an enclosed GeneralPath. Elliptical arc is implemented using an Arc2D in float precision.

Warning : An elliptical arc may be composed of several path segments. For futher details, see the SVG Appendix F.6

Field Summary

Fields

Modifier and Type	Field and Description
protected java.awt.geom.GeneralPath	path The enclosed general path.

Constructor Summary

Constructors

Constructor and Description
ExtendedGeneralPath() Constructs a new ExtendedGeneralPath.
ExtendedGeneralPath(int rule) Constructs a new ExtendedGeneralPath with the specified winding rule to control operations that require the interior of the path to be defined.
ExtendedGeneralPath(int rule, int initialCapacity) Constructs a new ExtendedGeneralPath object with the specified winding rule and the specified initial capacity to store path coordinates.
ExtendedGeneralPath(java.awt.Shape s) Constructs a new ExtendedGeneralPath object from an arbitrary Shape object.

Method Summary

Modifier and Type	Method and Description
void	append(ExtendedPathIterator epi, boolean connect) Delegates to the enclosed GeneralPath.
void	append(java.awt.geom.PathIterator pi, boolean connect) Delegates to the enclosed GeneralPath.
void	append(java.awt.Shape s, boolean connect) Delegates to the enclosed GeneralPath.
void	arcTo(float rx, float ry, float angle, boolean largeArcFlag, boolean sweepFlag, float x, float y) Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.
protected void	checkMoveTo() Checks if previous command was a moveto command, skipping a close command (if present).
java.lang.Object	clone() Delegates to the enclosed GeneralPath.
void	closePath() Delegates to the enclosed GeneralPath.
static java.awt.geom.Arc2D	computeArc(double x0, double y0, double rx, double ry, double angle, boolean largeArcFlag, boolean sweepFlag, double x, double y) This constructs an unrotated Arc2D from the SVG specification of an Elliptical arc.
boolean	contains(double x, double y) Delegates to the enclosed GeneralPath.
boolean	contains(double x, double y, double w, double h) Delegates to the enclosed GeneralPath.
boolean	contains(java.awt.geom.Point2D p) Delegates to the enclosed GeneralPath.
boolean	contains(java.awt.geom.Rectangle2D r) Delegates to the enclosed GeneralPath.
java.awt.Shape	createTransformedShape(java.awt.geom.AffineTransform at) Delegates to the enclosed GeneralPath.
void	curveTo(float x1, float y1, float x2, float y2, float x3, float y3) Delegates to the enclosed GeneralPath.
java.awt.Rectangle	getBounds() Delegates to the enclosed GeneralPath.
java.awt.geom.Rectangle2D	getBounds2D() Delegates to the enclosed GeneralPath.
java.awt.geom.Point2D	getCurrentPoint() get the current position or null.
ExtendedPathIterator	getExtendedPathIterator() Delegates to the enclosed GeneralPath.
java.awt.geom.PathIterator	getPathIterator(java.awt.geom.AffineTransform at) Delegates to the enclosed GeneralPath.
java.awt.geom.PathIterator	getPathIterator(java.awt.geom.AffineTransform at, double flatness) Delegates to the enclosed GeneralPath.
int	getWindingRule() Delegates to the enclosed GeneralPath.
boolean	intersects(double x, double y, double w, double h) Delegates to the enclosed GeneralPath.
boolean	intersects(java.awt.geom.Rectangle2D r) Delegates to the enclosed GeneralPath.
void	lineTo(float x, float y) Delegates to the enclosed GeneralPath.
void	moveTo(float x, float y) Delegates to the enclosed GeneralPath.
void	quadTo(float x1, float y1, float x2, float y2) Delegates to the enclosed GeneralPath.
void	reset() Delegates to the enclosed GeneralPath.
void	setWindingRule(int rule) Delegates to the enclosed GeneralPath.
void	transform(java.awt.geom.AffineTransform at) Delegates to the enclosed GeneralPath.

Methods inherited from class java.lang.Object

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

Field Detail

path

protected java.awt.geom.GeneralPath path

The enclosed general path.

Constructor Detail

ExtendedGeneralPath

public ExtendedGeneralPath()

Constructs a new ExtendedGeneralPath.

ExtendedGeneralPath

public ExtendedGeneralPath(int rule)

Constructs a new ExtendedGeneralPath with the specified winding rule to control operations that require the interior of the path to be defined.

ExtendedGeneralPath

public ExtendedGeneralPath(int rule,
                           int initialCapacity)

Constructs a new ExtendedGeneralPath object with the specified winding rule and the specified initial capacity to store path coordinates.

ExtendedGeneralPath

public ExtendedGeneralPath(java.awt.Shape s)

Constructs a new ExtendedGeneralPath object from an arbitrary Shape object.

Method Detail

arcTo

public void arcTo(float rx,
                  float ry,
                  float angle,
                  boolean largeArcFlag,
                  boolean sweepFlag,
                  float x,
                  float y)

Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.

Parameters:

rx - the x radius of the ellipse

ry - the y radius of the ellipse

angle - the angle from the x-axis of the current coordinate system to the x-axis of the ellipse in degrees.

largeArcFlag - the large arc flag. If true the arc spanning less than or equal to 180 degrees is chosen, otherwise the arc spanning greater than 180 degrees is chosen

sweepFlag - the sweep flag. If true the line joining center to arc sweeps through decreasing angles otherwise it sweeps through increasing angles

x - the absolute x coordinate of the final point of the arc.

y - the absolute y coordinate of the final point of the arc.

computeArc

public static java.awt.geom.Arc2D computeArc(double x0,
                                             double y0,
                                             double rx,
                                             double ry,
                                             double angle,
                                             boolean largeArcFlag,
                                             boolean sweepFlag,
                                             double x,
                                             double y)

This constructs an unrotated Arc2D from the SVG specification of an Elliptical arc. To get the final arc you need to apply a rotation transform such as: AffineTransform.getRotateInstance (angle, arc.getX()+arc.getWidth()/2, arc.getY()+arc.getHeight()/2);

moveTo

public void moveTo(float x,
                   float y)

Delegates to the enclosed GeneralPath.

lineTo

public void lineTo(float x,
                   float y)

Delegates to the enclosed GeneralPath.

quadTo

public void quadTo(float x1,
                   float y1,
                   float x2,
                   float y2)

Delegates to the enclosed GeneralPath.

curveTo

public void curveTo(float x1,
                    float y1,
                    float x2,
                    float y2,
                    float x3,
                    float y3)

Delegates to the enclosed GeneralPath.

closePath

public void closePath()

Delegates to the enclosed GeneralPath.

checkMoveTo

protected void checkMoveTo()

Checks if previous command was a moveto command, skipping a close command (if present).

append

public void append(java.awt.Shape s,
                   boolean connect)

Delegates to the enclosed GeneralPath.

append

public void append(java.awt.geom.PathIterator pi,
                   boolean connect)

Delegates to the enclosed GeneralPath.

append

public void append(ExtendedPathIterator epi,
                   boolean connect)

Delegates to the enclosed GeneralPath.

getWindingRule

public int getWindingRule()

Delegates to the enclosed GeneralPath.

setWindingRule

public void setWindingRule(int rule)

Delegates to the enclosed GeneralPath.

getCurrentPoint

public java.awt.geom.Point2D getCurrentPoint()

get the current position or null.

reset

public void reset()

Delegates to the enclosed GeneralPath.

transform

public void transform(java.awt.geom.AffineTransform at)

Delegates to the enclosed GeneralPath.

createTransformedShape

public java.awt.Shape createTransformedShape(java.awt.geom.AffineTransform at)

Delegates to the enclosed GeneralPath.

getBounds

public java.awt.Rectangle getBounds()

Delegates to the enclosed GeneralPath.

Specified by:

getBounds in interface java.awt.Shape

getBounds2D

public java.awt.geom.Rectangle2D getBounds2D()

Delegates to the enclosed GeneralPath.

Specified by:

getBounds2D in interface java.awt.Shape

contains

public boolean contains(double x,
                        double y)

Delegates to the enclosed GeneralPath.

Specified by:

contains in interface java.awt.Shape

contains

public boolean contains(java.awt.geom.Point2D p)

Delegates to the enclosed GeneralPath.

Specified by:

contains in interface java.awt.Shape

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)

Delegates to the enclosed GeneralPath.

Specified by:

contains in interface java.awt.Shape

contains

public boolean contains(java.awt.geom.Rectangle2D r)

Delegates to the enclosed GeneralPath.

Specified by:

contains in interface java.awt.Shape

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)

Delegates to the enclosed GeneralPath.

Specified by:

intersects in interface java.awt.Shape

intersects

public boolean intersects(java.awt.geom.Rectangle2D r)

Delegates to the enclosed GeneralPath.

Specified by:

intersects in interface java.awt.Shape

getPathIterator

public java.awt.geom.PathIterator getPathIterator(java.awt.geom.AffineTransform at)

Delegates to the enclosed GeneralPath.

Specified by:

getPathIterator in interface java.awt.Shape

getPathIterator

public java.awt.geom.PathIterator getPathIterator(java.awt.geom.AffineTransform at,
                                                  double flatness)

Delegates to the enclosed GeneralPath.

Specified by:

getPathIterator in interface java.awt.Shape

getExtendedPathIterator

public ExtendedPathIterator getExtendedPathIterator()

Delegates to the enclosed GeneralPath.

clone

public java.lang.Object clone()

Delegates to the enclosed GeneralPath.

Overrides:

clone in class java.lang.Object