001: /* ========================================================================
002: * JCommon : a free general purpose class library for the Java(tm) platform
003: * ========================================================================
004: *
005: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006: *
007: * Project Info: http://www.jfree.org/jcommon/index.html
008: *
009: * This library is free software; you can redistribute it and/or modify it
010: * under the terms of the GNU Lesser General Public License as published by
011: * the Free Software Foundation; either version 2.1 of the License, or
012: * (at your option) any later version.
013: *
014: * This library is distributed in the hope that it will be useful, but
015: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017: * License for more details.
018: *
019: * You should have received a copy of the GNU Lesser General Public
020: * License along with this library; if not, write to the Free Software
021: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022: * USA.
023: *
024: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025: * in the United States and other countries.]
026: *
027: * ----------
028: * Align.java
029: * ----------
030: * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
031: *
032: * Original Author: Christian W. Zuckschwerdt;
033: * Contributor(s): David Gilbert (for Object Refinery Limited);
034: *
035: * $Id: Align.java,v 1.5 2005/10/18 13:18:34 mungady Exp $
036: *
037: * Changes (from 30-May-2002)
038: * --------------------------
039: * 30-May-2002 : Added title (DG);
040: * 13-Oct-2002 : Fixed errors reported by Checkstyle (DG);
041: *
042: */
043:
044: package org.jfree.ui;
045:
046: import java.awt.geom.Rectangle2D;
047:
048: /**
049: * A utility class for aligning rectangles.
050: *
051: * @author David Gilbert
052: */
053: public final class Align {
054:
055: /** Center alignment. */
056: public static final int CENTER = 0x00;
057:
058: /** Top alignment. */
059: public static final int TOP = 0x01;
060:
061: /** Bottom alignment. */
062: public static final int BOTTOM = 0x02;
063:
064: /** Left alignment. */
065: public static final int LEFT = 0x04;
066:
067: /** Right alignment. */
068: public static final int RIGHT = 0x08;
069:
070: /** Top/Left alignment. */
071: public static final int TOP_LEFT = TOP | LEFT;
072:
073: /** Top/Right alignment. */
074: public static final int TOP_RIGHT = TOP | RIGHT;
075:
076: /** Bottom/Left alignment. */
077: public static final int BOTTOM_LEFT = BOTTOM | LEFT;
078:
079: /** Bottom/Right alignment. */
080: public static final int BOTTOM_RIGHT = BOTTOM | RIGHT;
081:
082: /** Horizontal fit. */
083: public static final int FIT_HORIZONTAL = LEFT | RIGHT;
084:
085: /** Vertical fit. */
086: public static final int FIT_VERTICAL = TOP | BOTTOM;
087:
088: /** Complete fit. */
089: public static final int FIT = FIT_HORIZONTAL | FIT_VERTICAL;
090:
091: /** North alignment (same as TOP). */
092: public static final int NORTH = TOP;
093:
094: /** South alignment (same as BOTTOM). */
095: public static final int SOUTH = BOTTOM;
096:
097: /** West alignment (same as LEFT). */
098: public static final int WEST = LEFT;
099:
100: /** East alignment (same as RIGHT). */
101: public static final int EAST = RIGHT;
102:
103: /** North/West alignment (same as TOP_LEFT). */
104: public static final int NORTH_WEST = NORTH | WEST;
105:
106: /** North/East alignment (same as TOP_RIGHT). */
107: public static final int NORTH_EAST = NORTH | EAST;
108:
109: /** South/West alignment (same as BOTTOM_LEFT). */
110: public static final int SOUTH_WEST = SOUTH | WEST;
111:
112: /** South/East alignment (same as BOTTOM_RIGHT). */
113: public static final int SOUTH_EAST = SOUTH | EAST;
114:
115: /**
116: * Private constructor.
117: */
118: private Align() {
119: super ();
120: }
121:
122: /**
123: * Aligns one rectangle (<code>rect</code>) relative to another rectangle (<code>frame</code>).
124: *
125: * @param rect the rectangle to be aligned (<code>null</code> not permitted).
126: * @param frame the reference frame (<code>null</code> not permitted).
127: * @param align the alignment code.
128: */
129: public static void align(final Rectangle2D rect,
130: final Rectangle2D frame, final int align) {
131:
132: double x = frame.getCenterX() - rect.getWidth() / 2.0;
133: double y = frame.getCenterY() - rect.getHeight() / 2.0;
134: double w = rect.getWidth();
135: double h = rect.getHeight();
136:
137: if ((align & FIT_VERTICAL) == FIT_VERTICAL) {
138: h = frame.getHeight();
139: }
140:
141: if ((align & FIT_HORIZONTAL) == FIT_HORIZONTAL) {
142: w = frame.getWidth();
143: }
144:
145: if ((align & TOP) == TOP) {
146: y = frame.getMinY();
147: }
148:
149: if ((align & BOTTOM) == BOTTOM) {
150: y = frame.getMaxY() - h;
151: }
152:
153: if ((align & LEFT) == LEFT) {
154: x = frame.getX();
155: }
156:
157: if ((align & RIGHT) == RIGHT) {
158: x = frame.getMaxX() - w;
159: }
160:
161: rect.setRect(x, y, w, h);
162:
163: }
164:
165: }
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