org.apache.batik.ext.awt.geom
Class ExtendedGeneralPath

java.lang.Object
  extended by org.apache.batik.ext.awt.geom.ExtendedGeneralPath
All Implemented Interfaces:
Shape, Cloneable, ExtendedShape

public class ExtendedGeneralPath
extends Object
implements ExtendedShape, 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
protected  GeneralPath path
          The enclosed general path.
 
Constructor Summary
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(Shape s)
          Constructs a new ExtendedGeneralPath object from an arbitrary Shape object.
 
Method Summary
 void append(ExtendedPathIterator epi, boolean connect)
          Delegates to the enclosed GeneralPath.
 void append(PathIterator pi, boolean connect)
          Delegates to the enclosed GeneralPath.
 void append(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).
 Object clone()
          Delegates to the enclosed GeneralPath.
 void closePath()
          Delegates to the enclosed GeneralPath.
static 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(Point2D p)
          Delegates to the enclosed GeneralPath.
 boolean contains(Rectangle2D r)
          Delegates to the enclosed GeneralPath.
 Shape createTransformedShape(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.
 Rectangle getBounds()
          Delegates to the enclosed GeneralPath.
 Rectangle2D getBounds2D()
          Delegates to the enclosed GeneralPath.
 Point2D getCurrentPoint()
          get the current position or null.
 ExtendedPathIterator getExtendedPathIterator()
          Delegates to the enclosed GeneralPath.
 PathIterator getPathIterator(AffineTransform at)
          Delegates to the enclosed GeneralPath.
 PathIterator getPathIterator(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(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(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 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(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 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(Shape s,
                   boolean connect)
Delegates to the enclosed GeneralPath.


append

public void append(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 Point2D getCurrentPoint()
get the current position or null.


reset

public void reset()
Delegates to the enclosed GeneralPath.


transform

public void transform(AffineTransform at)
Delegates to the enclosed GeneralPath.


createTransformedShape

public Shape createTransformedShape(AffineTransform at)
Delegates to the enclosed GeneralPath.


getBounds

public Rectangle getBounds()
Delegates to the enclosed GeneralPath.

Specified by:
getBounds in interface Shape

getBounds2D

public Rectangle2D getBounds2D()
Delegates to the enclosed GeneralPath.

Specified by:
getBounds2D in interface Shape

contains

public boolean contains(double x,
                        double y)
Delegates to the enclosed GeneralPath.

Specified by:
contains in interface Shape

contains

public boolean contains(Point2D p)
Delegates to the enclosed GeneralPath.

Specified by:
contains in interface Shape

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)
Delegates to the enclosed GeneralPath.

Specified by:
contains in interface Shape

contains

public boolean contains(Rectangle2D r)
Delegates to the enclosed GeneralPath.

Specified by:
contains in interface Shape

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)
Delegates to the enclosed GeneralPath.

Specified by:
intersects in interface Shape

intersects

public boolean intersects(Rectangle2D r)
Delegates to the enclosed GeneralPath.

Specified by:
intersects in interface Shape

getPathIterator

public PathIterator getPathIterator(AffineTransform at)
Delegates to the enclosed GeneralPath.

Specified by:
getPathIterator in interface Shape

getPathIterator

public PathIterator getPathIterator(AffineTransform at,
                                    double flatness)
Delegates to the enclosed GeneralPath.

Specified by:
getPathIterator in interface Shape

getExtendedPathIterator

public ExtendedPathIterator getExtendedPathIterator()
Delegates to the enclosed GeneralPath.

Specified by:
getExtendedPathIterator in interface ExtendedShape

clone

public Object clone()
Delegates to the enclosed GeneralPath.

Overrides:
clone in class Object


Copyright © 2008 Apache Software Foundation. All Rights Reserved.