Source Code Cross Referenced for XYDatasetTableModel.java in  » Chart » jfreechart » org » jfree » data » xy » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.data.xy 
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:         * XYDatasetTableModel.java
029:         * ------------------------
030:         * (C)opyright 2003-2007, by Bryan Scott and Contributors.
031:         *
032:         * Original Author:  Bryan Scott ;
033:         * Contributor(s):   David Gilbert (for Object Refinery Limited);
034:         *
035:         * Changes
036:         * -------
037:         * 01-Jul-2003 : Version 1 contributed by Bryan Scott (DG);
038:         * 27-Apr-2005 : Change XYDataset --> TableXYDataset because the table model
039:         *               assumes all series share the same x-values, and this is not
040:         *               enforced by XYDataset.  Also fixed bug 1191046, a problem
041:         *               in the getValueAt() method (DG);
042:         * 
043:         */
044:
045:        package org.jfree.data.xy;
046:
047:        import javax.swing.table.AbstractTableModel;
048:        import javax.swing.table.TableModel;
049:
050:        import org.jfree.data.general.DatasetChangeEvent;
051:        import org.jfree.data.general.DatasetChangeListener;
052:
053:        /**
054:         * A READ-ONLY wrapper around a {@link TableXYDataset} to convert it to a
055:         * table model for use in a JTable.  The first column of the table shows the
056:         * x-values, the remaining columns show the y-values for each series (series 0
057:         * appears in column 1, series 1 appears in column 2, etc).
058:         * <P>
059:         * TO DO:
060:         * <ul>
061:         * <li>implement proper naming for x axis (getColumnName)</li>
062:         * <li>implement setValueAt to remove READ-ONLY constraint (not sure how)</li>
063:         * </ul>
064:         */
065:        public class XYDatasetTableModel extends AbstractTableModel implements 
066:                TableModel, DatasetChangeListener {
067:
068:            /** The dataset. */
069:            TableXYDataset model = null;
070:
071:            /**
072:             * Default constructor.
073:             */
074:            public XYDatasetTableModel() {
075:                super ();
076:            }
077:
078:            /**
079:             * Creates a new table model based on the specified dataset.
080:             *
081:             * @param dataset  the dataset.
082:             */
083:            public XYDatasetTableModel(TableXYDataset dataset) {
084:                this ();
085:                this .model = dataset;
086:                this .model.addChangeListener(this );
087:            }
088:
089:            /**
090:             * Sets the model (dataset).
091:             *
092:             * @param dataset  the dataset.
093:             */
094:            public void setModel(TableXYDataset dataset) {
095:                this .model = dataset;
096:                this .model.addChangeListener(this );
097:                fireTableDataChanged();
098:            }
099:
100:            /**
101:             * Returns the number of rows.
102:             *
103:             * @return The row count.
104:             */
105:            public int getRowCount() {
106:                if (this .model == null) {
107:                    return 0;
108:                }
109:                return this .model.getItemCount();
110:            }
111:
112:            /**
113:             * Gets the number of columns in the model.
114:             *
115:             * @return The number of columns in the model.
116:             */
117:            public int getColumnCount() {
118:                if (this .model == null) {
119:                    return 0;
120:                }
121:                return this .model.getSeriesCount() + 1;
122:            }
123:
124:            /**
125:             * Returns the column name.
126:             *
127:             * @param column  the column index.
128:             *
129:             * @return The column name.
130:             */
131:            public String getColumnName(int column) {
132:                if (this .model == null) {
133:                    return super .getColumnName(column);
134:                }
135:                if (column < 1) {
136:                    return "X Value";
137:                } else {
138:                    return this .model.getSeriesKey(column - 1).toString();
139:                }
140:            }
141:
142:            /**
143:             * Returns a value of the specified cell.
144:             * Column 0 is the X axis, Columns 1 and over are the Y axis
145:             *
146:             * @param row  the row number.
147:             * @param column  the column number.
148:             *
149:             * @return The value of the specified cell.
150:             */
151:            public Object getValueAt(int row, int column) {
152:                if (this .model == null) {
153:                    return null;
154:                }
155:                if (column < 1) {
156:                    return this .model.getX(0, row);
157:                } else {
158:                    return this .model.getY(column - 1, row);
159:                }
160:            }
161:
162:            /**
163:             * Receives notification that the underlying dataset has changed.
164:             *
165:             * @param event  the event
166:             *
167:             * @see DatasetChangeListener
168:             */
169:            public void datasetChanged(DatasetChangeEvent event) {
170:                fireTableDataChanged();
171:            }
172:
173:            /**
174:             * Returns a flag indicating whether or not the specified cell is editable.
175:             *
176:             * @param row  the row number.
177:             * @param column  the column number.
178:             *
179:             * @return <code>true</code> if the specified cell is editable.
180:             */
181:            public boolean isCellEditable(int row, int column) {
182:                return false;
183:            }
184:
185:            /**
186:             * Updates the {@link XYDataset} if allowed.
187:             *
188:             * @param value  the new value.
189:             * @param row  the row.
190:             * @param column  the column.
191:             */
192:            public void setValueAt(Object value, int row, int column) {
193:                if (isCellEditable(row, column)) {
194:                    // XYDataset only provides methods for reading a dataset...
195:                }
196:            }
197:
198:            //    /**
199:            //     * Run a demonstration of the table model interface.
200:            //     *
201:            //     * @param args  ignored.
202:            //     *
203:            //     * @throws Exception when an error occurs.
204:            //     */
205:            //    public static void main(String args[]) throws Exception {
206:            //        JFrame frame = new JFrame();
207:            //        JPanel panel = new JPanel();
208:            //        panel.setLayout(new BorderLayout());
209:            //
210:            //        XYSeries s1 = new XYSeries("Series 1", true, false);
211:            //        for (int i = 0; i < 10; i++) {
212:            //            s1.add(i, Math.random());   
213:            //        }
214:            //        XYSeries s2 = new XYSeries("Series 2", true, false);
215:            //        for (int i = 0; i < 15; i++) {
216:            //            s2.add(i, Math.random());   
217:            //        }
218:            //        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
219:            //        dataset.addSeries(s1);
220:            //        dataset.addSeries(s2);
221:            //        XYDatasetTableModel tablemodel = new XYDatasetTableModel();
222:            //
223:            //        tablemodel.setModel(dataset);
224:            //
225:            //        JTable dataTable = new JTable(tablemodel);
226:            //        JScrollPane scroll = new JScrollPane(dataTable);
227:            //        scroll.setPreferredSize(new Dimension(600, 150));
228:            //
229:            //        JFreeChart chart = ChartFactory.createXYLineChart(
230:            //            "XY Series Demo",
231:            //            "X", "Y", dataset, PlotOrientation.VERTICAL,
232:            //            true,
233:            //            true,
234:            //            false
235:            //        );
236:            //
237:            //        ChartPanel chartPanel = new ChartPanel(chart);
238:            //
239:            //        panel.add(chartPanel, BorderLayout.CENTER);
240:            //        panel.add(scroll, BorderLayout.SOUTH);
241:            //
242:            //        frame.setContentPane(panel);
243:            //        frame.setSize(600, 500);
244:            //        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
245:            //        frame.show();
246:            //        RefineryUtilities.centerFrameOnScreen(frame);
247:            //    }
248:
249:        }
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