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package com.sun.javafx.geom;

import java.util.NoSuchElementException;

import com.sun.javafx.geom.transform.BaseTransform;

A utility class to iterate over the path segments of a quadratic curve segment through the PathIterator interface.
Version:10 Feb 1997
/** * A utility class to iterate over the path segments of a quadratic curve * segment through the PathIterator interface. * * @version 10 Feb 1997 */
class QuadIterator implements PathIterator { QuadCurve2D quad; BaseTransform transform; int index; QuadIterator(QuadCurve2D q, BaseTransform tx) { this.quad = q; this.transform = tx; }
Return the winding rule for determining the insideness of the path.
See Also:
/** * 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.
Returns:true if there are more points to read
/** * Tests if there are more points to read. * @return true if there are more points to read */
public boolean isDone() { return (index > 1); }
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.
/** * 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 Also:
/** * 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("quad iterator iterator out of bounds"); } int type; if (index == 0) { coords[0] = quad.x1; coords[1] = quad.y1; type = SEG_MOVETO; } else { coords[0] = quad.ctrlx; coords[1] = quad.ctrly; coords[2] = quad.x2; coords[3] = quad.y2; type = SEG_QUADTO; } if (transform != null) { transform.transform(coords, 0, coords, 0, index == 0 ? 1 : 2); } return type; } }