Source Code Cross Referenced for DialBackground.java in  » Chart » jfreechart » org » jfree » experimental » chart » plot » dial » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.experimental.chart.plot.dial 
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:         * DialBackground.java
029:         * -------------------
030:         * (C) Copyright 2006, 2007, by Object Refinery Limited.
031:         *
032:         * Original Author:  David Gilbert (for Object Refinery Limited);
033:         * Contributor(s):   -;
034:         *
035:         * $Id: DialBackground.java,v 1.1.2.3 2007/06/11 11:14:02 mungady Exp $
036:         *
037:         * Changes
038:         * -------
039:         * 03-Nov-2006 : Version 1 (DG);
040:         * 
041:         */
042:
043:        package org.jfree.experimental.chart.plot.dial;
044:
045:        import java.awt.Color;
046:        import java.awt.GradientPaint;
047:        import java.awt.Graphics2D;
048:        import java.awt.Paint;
049:        import java.awt.geom.Rectangle2D;
050:        import java.io.IOException;
051:        import java.io.ObjectInputStream;
052:        import java.io.ObjectOutputStream;
053:        import java.io.Serializable;
054:
055:        import org.jfree.chart.HashUtilities;
056:        import org.jfree.io.SerialUtilities;
057:        import org.jfree.ui.GradientPaintTransformer;
058:        import org.jfree.ui.StandardGradientPaintTransformer;
059:        import org.jfree.util.PaintUtilities;
060:        import org.jfree.util.PublicCloneable;
061:
062:        /**
063:         * A regular dial layer that can be used to draw the background for a dial.
064:         */
065:        public class DialBackground extends AbstractDialLayer implements 
066:                DialLayer, Cloneable, PublicCloneable, Serializable {
067:
068:            /** 
069:             * The background paint.  This field is transient because serialization
070:             * requires special handling.
071:             */
072:            private transient Paint paint;
073:
074:            /** 
075:             * The transformer used when the background paint is an instance of
076:             * <code>GradientPaint</code>. 
077:             */
078:            private GradientPaintTransformer gradientPaintTransformer;
079:
080:            /** 
081:             * Creates a new instance of <code>DialBackground</code>.  The 
082:             * default background paint is <code>Color.white</code>.
083:             */
084:            public DialBackground() {
085:                this (Color.white);
086:            }
087:
088:            /**
089:             * Creates a new instance of <code>DialBackground</code>.  The 
090:             *
091:             * @param paint  the paint (<code>null</code> not permitted).
092:             *
093:             * @throws IllegalArgumentException if <code>paint</code> is 
094:             *     <code>null</code>.
095:             */
096:            public DialBackground(Paint paint) {
097:                if (paint == null) {
098:                    throw new IllegalArgumentException("Null 'paint' argument.");
099:                }
100:                this .paint = paint;
101:                this .gradientPaintTransformer = new StandardGradientPaintTransformer();
102:            }
103:
104:            /**
105:             * Returns the paint used to fill the background. 
106:             *
107:             * @return The paint (never <code>null</code>).
108:             *
109:             * @see #setPaint(Paint)
110:             */
111:            public Paint getPaint() {
112:                return this .paint;
113:            }
114:
115:            /**
116:             * Sets the paint for the dial background.
117:             *
118:             * @param paint  the paint (<code>null</code> not permitted).
119:             *
120:             * @see #getPaint()
121:             */
122:            public void setPaint(Paint paint) {
123:                if (paint == null) {
124:                    throw new IllegalArgumentException("Null 'paint' argument.");
125:                }
126:                this .paint = paint;
127:                notifyListeners(new DialLayerChangeEvent(this ));
128:            }
129:
130:            /**
131:             * Returns the transformer used to adjust the coordinates of any 
132:             * <code>GradientPaint</code> instance used for the background paint.
133:             *
134:             * @return The transformer (never <code>null</code>).
135:             *
136:             * @see #setGradientPaintTransformer(GradientPaintTransformer)
137:             */
138:            public GradientPaintTransformer getGradientPaintTransformer() {
139:                return this .gradientPaintTransformer;
140:            }
141:
142:            /**
143:             * Sets the transformer used to adjust the coordinates of any
144:             * <code>GradientPaint</code> instance used for the background paint.
145:             *
146:             * @param t  the transformer (<code>null</code> not permitted).
147:             *
148:             * @see #getGradientPaintTransformer()
149:             */
150:            public void setGradientPaintTransformer(GradientPaintTransformer t) {
151:                if (t == null) {
152:                    throw new IllegalArgumentException("Null 't' argument.");
153:                }
154:                this .gradientPaintTransformer = t;
155:                notifyListeners(new DialLayerChangeEvent(this ));
156:            }
157:
158:            /**
159:             * Returns <code>true</code> to indicate that this layer should be 
160:             * clipped within the dial window. 
161:             *
162:             * @return <code>true</code>.
163:             */
164:            public boolean isClippedToWindow() {
165:                return true;
166:            }
167:
168:            /**
169:             * Draws the background to the specified graphics device.  If the dial
170:             * frame specifies a window, the clipping region will already have been 
171:             * set to this window before this method is called.
172:             *
173:             * @param g2  the graphics device (<code>null</code> not permitted).
174:             * @param plot  the plot (ignored here).
175:             * @param frame  the dial frame (ignored here).
176:             * @param view  the view rectangle (<code>null</code> not permitted). 
177:             */
178:            public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame,
179:                    Rectangle2D view) {
180:
181:                Paint p = this .paint;
182:                if (p instanceof  GradientPaint) {
183:                    p = this .gradientPaintTransformer.transform(
184:                            (GradientPaint) p, view);
185:                }
186:                g2.setPaint(p);
187:                g2.fill(view);
188:            }
189:
190:            /**
191:             * Tests this instance for equality with an arbitrary object.
192:             *
193:             * @param obj  the object (<code>null</code> permitted).
194:             *
195:             * @return A boolean.
196:             */
197:            public boolean equals(Object obj) {
198:                if (obj == this ) {
199:                    return true;
200:                }
201:                if (!(obj instanceof  DialBackground)) {
202:                    return false;
203:                }
204:                DialBackground that = (DialBackground) obj;
205:                if (!PaintUtilities.equal(this .paint, that.paint)) {
206:                    return false;
207:                }
208:                if (!this .gradientPaintTransformer
209:                        .equals(that.gradientPaintTransformer)) {
210:                    return false;
211:                }
212:                return true;
213:            }
214:
215:            /**
216:             * Returns a hash code for this instance.
217:             * 
218:             * @return The hash code.
219:             */
220:            public int hashCode() {
221:                int result = 193;
222:                result = 37 * result
223:                        + HashUtilities.hashCodeForPaint(this .paint);
224:                result = 37 * result + this .gradientPaintTransformer.hashCode();
225:                return result;
226:            }
227:
228:            /**
229:             * Returns a clone of this instance.
230:             *
231:             * @return The clone.
232:             *
233:             * @throws CloneNotSupportedException if some attribute of this instance
234:             *     cannot be cloned.
235:             */
236:            public Object clone() throws CloneNotSupportedException {
237:                return super .clone();
238:            }
239:
240:            /**
241:             * Provides serialization support.
242:             *
243:             * @param stream  the output stream.
244:             *
245:             * @throws IOException  if there is an I/O error.
246:             */
247:            private void writeObject(ObjectOutputStream stream)
248:                    throws IOException {
249:                stream.defaultWriteObject();
250:                SerialUtilities.writePaint(this .paint, stream);
251:            }
252:
253:            /**
254:             * Provides serialization support.
255:             *
256:             * @param stream  the input stream.
257:             *
258:             * @throws IOException  if there is an I/O error.
259:             * @throws ClassNotFoundException  if there is a classpath problem.
260:             */
261:            private void readObject(ObjectInputStream stream)
262:                    throws IOException, ClassNotFoundException {
263:                stream.defaultReadObject();
264:                this.paint = SerialUtilities.readPaint(stream);
265:            }
266:
267:        }
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