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comparison flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 654:bbc966c81809

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#90 Removed margins between data area border and curves. flys-artifacts/trunk@2050 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 03 Jun 2011 10:21:13 +0000
parents 67c7020f4ed3
children 434146596838
comparison
equal deleted inserted replaced
653:67c7020f4ed3 654:bbc966c81809
13 import org.jfree.chart.axis.NumberAxis; 13 import org.jfree.chart.axis.NumberAxis;
14 import org.jfree.chart.axis.ValueAxis; 14 import org.jfree.chart.axis.ValueAxis;
15 import org.jfree.chart.plot.PlotOrientation; 15 import org.jfree.chart.plot.PlotOrientation;
16 import org.jfree.chart.plot.XYPlot; 16 import org.jfree.chart.plot.XYPlot;
17 import org.jfree.data.Range; 17 import org.jfree.data.Range;
18 import org.jfree.data.xy.XYDataset;
19
20 import org.jfree.ui.RectangleInsets;
18 21
19 import de.intevation.flys.exports.ChartExportHelper; 22 import de.intevation.flys.exports.ChartExportHelper;
20 23
21 24
22 /** 25 /**
25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> 28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
26 */ 29 */
27 public abstract class XYChartGenerator extends ChartGenerator { 30 public abstract class XYChartGenerator extends ChartGenerator {
28 31
29 /** The logger that is used in this generator.*/ 32 /** The logger that is used in this generator.*/
30 private static Logger logger = Logger.getLogger(ChartGenerator.class); 33 private static Logger logger = Logger.getLogger(XYChartGenerator.class);
31 34
32 35
33 public static final Color DEFAULT_GRID_COLOR = Color.GRAY; 36 public static final Color DEFAULT_GRID_COLOR = Color.GRAY;
34 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f; 37 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f;
35 38
108 return chart; 111 return chart;
109 } 112 }
110 113
111 114
112 /** 115 /**
113 * Zooms the chart to the ranges specified in the attribute document. 116 * This method zooms the plot to the specified ranges in the attribute
117 * document or to the ranges specified by the min/max values in the
118 * datasets. <b>Note:</b> We determine the range manually if no zoom ranges
119 * are given, because JFreeCharts auto-zoom adds a margin to the left and
120 * right of the data area.
114 * 121 *
115 * @param plot The XYPlot. 122 * @param plot The XYPlot.
116 */ 123 */
117 protected void zoom(XYPlot plot) { 124 protected void zoom(XYPlot plot) {
118 logger.debug("Zoom to specified ranges."); 125 logger.debug("Zoom to specified ranges.");
119 zoomX(plot); 126
120 zoomY(plot); 127 Range[] ranges = null;
128
129 boolean x = zoomX(plot);
130 if (!x) {
131 XYDataset dataset = plot.getDataset();
132
133 ranges = getRangesForDataset(dataset);
134
135 logger.debug("No x range specified. Set manually: " + ranges[0]);
136
137 ValueAxis axis = plot.getDomainAxis();
138 axis.setRange(ranges[0]);
139 }
140
141 boolean y = zoomY(plot);
142 if (!y) {
143 XYDataset dataset = plot.getDataset();
144
145 if (ranges == null) {
146 ranges = getRangesForDataset(dataset);
147 }
148
149 logger.debug("No y range specified. Set manually: " + ranges[1]);
150
151 ValueAxis axis = plot.getRangeAxis();
152 axis.setRange(ranges[1]);
153 }
121 } 154 }
122 155
123 156
124 /** 157 /**
125 * Zooms the x axis to the range specified in the attribute document. 158 * Zooms the x axis to the range specified in the attribute document.
126 * 159 *
127 * @param plot The XYPlot. 160 * @param plot The XYPlot.
128 */ 161 *
129 protected void zoomX(XYPlot plot) { 162 * @return true, if a zoom range was specified, otherwise false.
163 */
164 protected boolean zoomX(XYPlot plot) {
130 Range xrange = getDomainAxisRange(); 165 Range xrange = getDomainAxisRange();
131 if (xrange != null) { 166 if (xrange != null) {
132 ValueAxis xaxis = plot.getDomainAxis(); 167 ValueAxis xaxis = plot.getDomainAxis();
133 xaxis.setRange(xrange); 168 xaxis.setRange(xrange);
134 169
135 logger.debug("Zoom chart to X: " + xrange); 170 logger.debug("Zoom chart to X: " + xrange);
136 } 171
172 return true;
173 }
174
175 return false;
137 } 176 }
138 177
139 178
140 /** 179 /**
141 * Zooms the y axis to the range specified in the attribute document. 180 * Zooms the y axis to the range specified in the attribute document.
142 * 181 *
143 * @param plot The XYPlot. 182 * @param plot The XYPlot.
144 */ 183 *
145 protected void zoomY(XYPlot plot) { 184 * @return true, if a zoom range was specified, otherwise false.
185 */
186 protected boolean zoomY(XYPlot plot) {
146 Range yrange = getValueAxisRange(); 187 Range yrange = getValueAxisRange();
147 if (yrange != null) { 188 if (yrange != null) {
148 ValueAxis yaxis = plot.getRangeAxis(); 189 ValueAxis yaxis = plot.getRangeAxis();
149 yaxis.setRange(yrange); 190 yaxis.setRange(yrange);
150 191
151 logger.debug("Zoom chart to Y: " + yrange); 192 logger.debug("Zoom chart to Y: " + yrange);
152 } 193
194 return true;
195 }
196
197 return false;
198 }
199
200
201 /**
202 * This method extracts the minimum and maximum values for x and y axes.
203 *
204 * @param dataset The dataset that should be observed.
205 *
206 * @return a Range[] as follows: [x-Range, y-Range].
207 */
208 protected Range[] getRangesForDataset(XYDataset dataset) {
209 double[] xr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
210 double[] yr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
211
212 int sCount = dataset.getSeriesCount();
213
214 for (int i = 0; i < sCount; i++) {
215 int iCount = dataset.getItemCount(i);
216
217 for (int j = 0; j < iCount; j++) {
218 double x = dataset.getX(i, j).doubleValue();
219 double y = dataset.getY(i, j).doubleValue();
220
221 xr[0] = xr[0] < x ? xr[0] : x;
222 xr[1] = xr[1] > x ? xr[1] : x;
223 yr[0] = yr[0] < y ? yr[0] : y;
224 yr[1] = yr[1] > y ? yr[1] : y;
225 }
226 }
227
228 // this is only required, if there are no items in the dataset.
229 xr[0] = xr[0] < xr[1] ? xr[0] : xr[1];
230 xr[1] = xr[1] > xr[0] ? xr[1] : xr[0];
231 yr[0] = yr[0] < yr[1] ? yr[0] : yr[1];
232 yr[1] = yr[1] > yr[0] ? yr[1] : yr[0];
233
234 return new Range[] {new Range(xr[0], xr[1]), new Range(yr[0], yr[1])};
153 } 235 }
154 236
155 237
156 /** 238 /**
157 * Adjusts the axes of a plot. 239 * Adjusts the axes of a plot.
179 plot.setDomainGridlinesVisible(true); 261 plot.setDomainGridlinesVisible(true);
180 262
181 plot.setRangeGridlineStroke(gridStroke); 263 plot.setRangeGridlineStroke(gridStroke);
182 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR); 264 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR);
183 plot.setRangeGridlinesVisible(true); 265 plot.setRangeGridlinesVisible(true);
266
267 plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d));
184 } 268 }
185 269
186 270
187 protected void addSubtitles(JFreeChart chart) { 271 protected void addSubtitles(JFreeChart chart) {
188 // override this method in subclasses that need subtitles 272 // override this method in subclasses that need subtitles
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