/*
* Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package java.awt.geom;
import java.util.*;
/**
* A utility class to iterate over the path segments of a rectangle
* through the PathIterator interface.
*
* @author Jim Graham
*/
class
RectIterator implements
PathIterator {
double
x,
y,
w,
h;
AffineTransform affine;
int
index;
RectIterator(
Rectangle2D r,
AffineTransform at) {
this.
x =
r.
getX();
this.
y =
r.
getY();
this.
w =
r.
getWidth();
this.
h =
r.
getHeight();
this.
affine =
at;
if (
w < 0 ||
h < 0) {
index = 6;
}
}
/**
* Return the winding rule for determining the insideness of the
* path.
* @see #WIND_EVEN_ODD
* @see #WIND_NON_ZERO
*/
public int
getWindingRule() {
return
WIND_NON_ZERO;
}
/**
* Tests if there are more points to read.
* @return true if there are more points to read
*/
public boolean
isDone() {
return
index > 5;
}
/**
* Moves the iterator to the next segment of the path forwards
* along the primary direction of traversal as long as there are
* more points in that direction.
*/
public void
next() {
index++;
}
/**
* Returns the coordinates and type of the current path segment in
* the iteration.
* The return value is the path segment type:
* SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
* A float array of length 6 must be passed in and may be used to
* store the coordinates of the point(s).
* Each point is stored as a pair of float x,y coordinates.
* SEG_MOVETO and SEG_LINETO types will return one point,
* SEG_QUADTO will return two points,
* SEG_CUBICTO will return 3 points
* and SEG_CLOSE will not return any points.
* @see #SEG_MOVETO
* @see #SEG_LINETO
* @see #SEG_QUADTO
* @see #SEG_CUBICTO
* @see #SEG_CLOSE
*/
public int
currentSegment(float[]
coords) {
if (
isDone()) {
throw new
NoSuchElementException("rect iterator out of bounds");
}
if (
index == 5) {
return
SEG_CLOSE;
}
coords[0] = (float)
x;
coords[1] = (float)
y;
if (
index == 1 ||
index == 2) {
coords[0] += (float)
w;
}
if (
index == 2 ||
index == 3) {
coords[1] += (float)
h;
}
if (
affine != null) {
affine.
transform(
coords, 0,
coords, 0, 1);
}
return (
index == 0 ?
SEG_MOVETO :
SEG_LINETO);
}
/**
* Returns the coordinates and type of the current path segment in
* the iteration.
* The return value is the path segment type:
* SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE.
* A double array of length 6 must be passed in and may be used to
* store the coordinates of the point(s).
* Each point is stored as a pair of double x,y coordinates.
* SEG_MOVETO and SEG_LINETO types will return one point,
* SEG_QUADTO will return two points,
* SEG_CUBICTO will return 3 points
* and SEG_CLOSE will not return any points.
* @see #SEG_MOVETO
* @see #SEG_LINETO
* @see #SEG_QUADTO
* @see #SEG_CUBICTO
* @see #SEG_CLOSE
*/
public int
currentSegment(double[]
coords) {
if (
isDone()) {
throw new
NoSuchElementException("rect iterator out of bounds");
}
if (
index == 5) {
return
SEG_CLOSE;
}
coords[0] =
x;
coords[1] =
y;
if (
index == 1 ||
index == 2) {
coords[0] +=
w;
}
if (
index == 2 ||
index == 3) {
coords[1] +=
h;
}
if (
affine != null) {
affine.
transform(
coords, 0,
coords, 0, 1);
}
return (
index == 0 ?
SEG_MOVETO :
SEG_LINETO);
}
}