Source Code Cross Referenced for ExtendedCategoryAxis.java in  » Chart » jfreechart » org » jfree » chart » axis » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.chart.axis 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ===========================================================
002:         * JFreeChart : a free chart library for the Java(tm) platform
003:         * ===========================================================
004:         *
005:         * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006:         *
007:         * Project Info:  http://www.jfree.org/jfreechart/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:         * ExtendedCategoryAxis.java
029:         * -------------------------
030:         * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
031:         *
032:         * Original Author:  David Gilbert (for Object Refinery Limited);
033:         * Contributor(s):   -;
034:         *
035:         * $Id: ExtendedCategoryAxis.java,v 1.4.2.2 2007/03/21 11:16:59 mungady Exp $
036:         *
037:         * Changes
038:         * -------
039:         * 07-Nov-2003 : Version 1 (DG);
040:         * 07-Jan-2004 : Updated the createLabel() method (DG);
041:         * 29-Jan-2004 : Added paint attribute (DG);
042:         * ------------- JFREECHART 1.0.x ---------------------------------------------
043:         * 21-Mar-2007 : Implemented equals(), clone() and fixed serialization (DG);
044:         * 
045:         */
046:
047:        package org.jfree.chart.axis;
048:
049:        import java.awt.Color;
050:        import java.awt.Font;
051:        import java.awt.Graphics2D;
052:        import java.awt.Paint;
053:        import java.io.IOException;
054:        import java.io.ObjectInputStream;
055:        import java.io.ObjectOutputStream;
056:        import java.util.HashMap;
057:        import java.util.Map;
058:
059:        import org.jfree.chart.event.AxisChangeEvent;
060:        import org.jfree.io.SerialUtilities;
061:        import org.jfree.text.TextBlock;
062:        import org.jfree.text.TextFragment;
063:        import org.jfree.text.TextLine;
064:        import org.jfree.ui.RectangleEdge;
065:        import org.jfree.util.PaintUtilities;
066:
067:        /**
068:         * An extended version of the {@link CategoryAxis} class that supports 
069:         * sublabels on the axis.
070:         */
071:        public class ExtendedCategoryAxis extends CategoryAxis {
072:
073:            /** Storage for the sublabels. */
074:            private Map sublabels;
075:
076:            /** The sublabel font. */
077:            private Font sublabelFont;
078:
079:            /** The sublabel paint. */
080:            private transient Paint sublabelPaint;
081:
082:            /**
083:             * Creates a new axis.
084:             * 
085:             * @param label  the axis label.
086:             */
087:            public ExtendedCategoryAxis(String label) {
088:                super (label);
089:                this .sublabels = new HashMap();
090:                this .sublabelFont = new Font("SansSerif", Font.PLAIN, 10);
091:                this .sublabelPaint = Color.black;
092:            }
093:
094:            /**
095:             * Returns the font for the sublabels.
096:             * 
097:             * @return The font (never <code>null</code>).
098:             * 
099:             * @see #setSubLabelFont(Font)
100:             */
101:            public Font getSubLabelFont() {
102:                return this .sublabelFont;
103:            }
104:
105:            /**
106:             * Sets the font for the sublabels and sends an {@link AxisChangeEvent} to
107:             * all registered listeners.
108:             * 
109:             * @param font  the font (<code>null</code> not permitted).
110:             * 
111:             * @see #getSubLabelFont()
112:             */
113:            public void setSubLabelFont(Font font) {
114:                if (font == null) {
115:                    throw new IllegalArgumentException("Null 'font' argument.");
116:                }
117:                this .sublabelFont = font;
118:                notifyListeners(new AxisChangeEvent(this ));
119:            }
120:
121:            /**
122:             * Returns the paint for the sublabels.
123:             * 
124:             * @return The paint (never <code>null</code>).
125:             * 
126:             * @see #setSubLabelPaint(Paint)
127:             */
128:            public Paint getSubLabelPaint() {
129:                return this .sublabelPaint;
130:            }
131:
132:            /**
133:             * Sets the paint for the sublabels and sends an {@link AxisChangeEvent}
134:             * to all registered listeners.
135:             * 
136:             * @param paint  the paint (<code>null</code> not permitted).
137:             * 
138:             * @see #getSubLabelPaint()
139:             */
140:            public void setSubLabelPaint(Paint paint) {
141:                if (paint == null) {
142:                    throw new IllegalArgumentException("Null 'paint' argument.");
143:                }
144:                this .sublabelPaint = paint;
145:                notifyListeners(new AxisChangeEvent(this ));
146:            }
147:
148:            /**
149:             * Adds a sublabel for a category.
150:             * 
151:             * @param category  the category.
152:             * @param label  the label.
153:             */
154:            public void addSubLabel(Comparable category, String label) {
155:                this .sublabels.put(category, label);
156:            }
157:
158:            /**
159:             * Overrides the default behaviour by adding the sublabel to the text 
160:             * block that is used for the category label.
161:             * 
162:             * @param category  the category.
163:             * @param width  the width (not used yet).
164:             * @param edge  the location of the axis.
165:             * @param g2  the graphics device.
166:             * 
167:             * @return A label.
168:             */
169:            protected TextBlock createLabel(Comparable category, float width,
170:                    RectangleEdge edge, Graphics2D g2) {
171:                TextBlock label = super .createLabel(category, width, edge, g2);
172:                String s = (String) this .sublabels.get(category);
173:                if (s != null) {
174:                    if (edge == RectangleEdge.TOP
175:                            || edge == RectangleEdge.BOTTOM) {
176:                        TextLine line = new TextLine(s, this .sublabelFont,
177:                                this .sublabelPaint);
178:                        label.addLine(line);
179:                    } else if (edge == RectangleEdge.LEFT
180:                            || edge == RectangleEdge.RIGHT) {
181:                        TextLine line = label.getLastLine();
182:                        if (line != null) {
183:                            line.addFragment(new TextFragment("  " + s,
184:                                    this .sublabelFont, this .sublabelPaint));
185:                        }
186:                    }
187:                }
188:                return label;
189:            }
190:
191:            /**
192:             * Tests this axis for equality with an arbitrary object.
193:             * 
194:             * @param obj  the object (<code>null</code> permitted).
195:             * 
196:             * @return A boolean.
197:             */
198:            public boolean equals(Object obj) {
199:                if (obj == this ) {
200:                    return true;
201:                }
202:                if (!(obj instanceof  ExtendedCategoryAxis)) {
203:                    return false;
204:                }
205:                ExtendedCategoryAxis that = (ExtendedCategoryAxis) obj;
206:                if (!this .sublabelFont.equals(that.sublabelFont)) {
207:                    return false;
208:                }
209:                if (!PaintUtilities.equal(this .sublabelPaint,
210:                        that.sublabelPaint)) {
211:                    return false;
212:                }
213:                if (!this .sublabels.equals(that.sublabels)) {
214:                    return false;
215:                }
216:                return super .equals(obj);
217:            }
218:
219:            /**
220:             * Returns a clone of this axis.
221:             * 
222:             * @return A clone.
223:             * 
224:             * @throws CloneNotSupportedException if there is a problem cloning.
225:             */
226:            public Object clone() throws CloneNotSupportedException {
227:                ExtendedCategoryAxis clone = (ExtendedCategoryAxis) super 
228:                        .clone();
229:                clone.sublabels = new HashMap(this .sublabels);
230:                return clone;
231:            }
232:
233:            /**
234:             * Provides serialization support.
235:             *
236:             * @param stream  the output stream.
237:             *
238:             * @throws IOException  if there is an I/O error.
239:             */
240:            private void writeObject(ObjectOutputStream stream)
241:                    throws IOException {
242:                stream.defaultWriteObject();
243:                SerialUtilities.writePaint(this .sublabelPaint, stream);
244:            }
245:
246:            /**
247:             * Provides serialization support.
248:             *
249:             * @param stream  the input stream.
250:             *
251:             * @throws IOException  if there is an I/O error.
252:             * @throws ClassNotFoundException  if there is a classpath problem.
253:             */
254:            private void readObject(ObjectInputStream stream)
255:                    throws IOException, ClassNotFoundException {
256:                stream.defaultReadObject();
257:                this.sublabelPaint = SerialUtilities.readPaint(stream);
258:            }
259:
260:        }
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