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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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/*
 * (C) Copyright IBM Corp. 2005, All Rights Reserved.
 */
package java.awt.font;

import java.awt.geom.Point2D;


LayoutPath provides a mapping between locations relative to the baseline and points in user space. Locations consist of an advance along the baseline, and an offset perpendicular to the baseline at the advance. Positive values along the perpendicular are in the direction that is 90 degrees clockwise from the baseline vector. Locations are represented as a Point2D, where x is the advance and y is the offset. 
Since:1.6
/**
 * LayoutPath provides a mapping between locations relative to the
 * baseline and points in user space.  Locations consist of an advance
 * along the baseline, and an offset perpendicular to the baseline at
 * the advance.  Positive values along the perpendicular are in the
 * direction that is 90 degrees clockwise from the baseline vector.
 * Locations are represented as a {@code Point2D}, where x is the advance and
 * y is the offset.
 *
 * @since 1.6
 */
public abstract class LayoutPath {
    
Convert a point in user space to a location relative to the
path. The location is chosen so as to minimize the distance
from the point to the path (e.g., the magnitude of the offset
will be smallest).  If there is more than one such location,
the location with the smallest advance is chosen.

Params:
  • point – the point to convert.  If it is not the same
object as location, point will remain unmodified by this call.
  • location – a Point2D to hold the returned location. It can be the same object as point.
Throws:
Returns:true if the point is associated with the portion of the
path preceding the location, false if it is associated with
the portion following.  The default, if the location is not at
a break or sharp bend in the path, is to return true.
Since:1.6
/**
     * Convert a point in user space to a location relative to the
     * path. The location is chosen so as to minimize the distance
     * from the point to the path (e.g., the magnitude of the offset
     * will be smallest).  If there is more than one such location,
     * the location with the smallest advance is chosen.
     * @param point the point to convert.  If it is not the same
     * object as location, point will remain unmodified by this call.
     * @param location a {@code Point2D} to hold the returned location.
     * It can be the same object as point.
     * @return true if the point is associated with the portion of the
     * path preceding the location, false if it is associated with
     * the portion following.  The default, if the location is not at
     * a break or sharp bend in the path, is to return true.
     * @throws NullPointerException if point or location is null
     * @since 1.6
     */
    public abstract boolean pointToPath(Point2D point, Point2D location);

    
Convert a location relative to the path to a point in user
coordinates.  The path might bend abruptly or be disjoint at
the location's advance.  If this is the case, the value of
'preceding' is used to disambiguate the portion of the path
whose location and slope is to be used to interpret the offset.

Params:
  • location – a Point2D representing the advance (in x) and offset (in y) of a location relative to the path. If location is not the same object as point, location will remain unmodified by this call.
  • preceding – if true, the portion preceding the advance
should be used, if false the portion after should be used.
This has no effect if the path does not break or bend sharply
at the advance.
  • point – a Point2D to hold the returned point. It can be the same object as location.
Throws:
Since:1.6
/**
     * Convert a location relative to the path to a point in user
     * coordinates.  The path might bend abruptly or be disjoint at
     * the location's advance.  If this is the case, the value of
     * 'preceding' is used to disambiguate the portion of the path
     * whose location and slope is to be used to interpret the offset.
     * @param location a {@code Point2D} representing the advance (in x) and
     * offset (in y) of a location relative to the path.  If location
     * is not the same object as point, location will remain
     * unmodified by this call.
     * @param preceding if true, the portion preceding the advance
     * should be used, if false the portion after should be used.
     * This has no effect if the path does not break or bend sharply
     * at the advance.
     * @param point a {@code Point2D} to hold the returned point.  It can be
     * the same object as location.
     * @throws NullPointerException if location or point is null
     * @since 1.6
     */
    public abstract void pathToPoint(Point2D location, boolean preceding,
                                     Point2D point);
}