XYLineChartTest.java 5.4 KB

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  1. /* ===========================================================
  2. * JFreeChart : a free chart library for the Java(tm) platform
  3. * ===========================================================
  4. *
  5. * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
  6. *
  7. * Project Info: http://www.jfree.org/jfreechart/index.html
  8. *
  9. * This library is free software; you can redistribute it and/or modify it
  10. * under the terms of the GNU Lesser General Public License as published by
  11. * the Free Software Foundation; either version 2.1 of the License, or
  12. * (at your option) any later version.
  13. *
  14. * This library is distributed in the hope that it will be useful, but
  15. * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16. * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
  17. * License for more details.
  18. *
  19. * You should have received a copy of the GNU Lesser General Public
  20. * License along with this library; if not, write to the Free Software
  21. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  22. * USA.
  23. *
  24. * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
  25. * Other names may be trademarks of their respective owners.]
  26. *
  27. * --------------------
  28. * XYLineChartTest.java
  29. * --------------------
  30. * (C) Copyright 2005-2013, by Object Refinery Limited.
  31. *
  32. * Original Author: David Gilbert (for Object Refinery Limited);
  33. * Contributor(s): -;
  34. *
  35. * Changes:
  36. * --------
  37. * 12-Apr-2005 : Version 1 (DG);
  38. *
  39. */
  40. package org.jfree.chart;
  41. import static org.junit.Assert.assertTrue;
  42. import static org.junit.Assert.assertEquals;
  43. import static org.junit.Assert.fail;
  44. import java.awt.Graphics2D;
  45. import java.awt.geom.Rectangle2D;
  46. import java.awt.image.BufferedImage;
  47. import org.jfree.chart.axis.ValueAxis;
  48. import org.jfree.chart.event.ChartChangeEvent;
  49. import org.jfree.chart.event.ChartChangeListener;
  50. import org.jfree.chart.labels.StandardXYToolTipGenerator;
  51. import org.jfree.chart.labels.XYToolTipGenerator;
  52. import org.jfree.chart.plot.XYPlot;
  53. import org.jfree.chart.renderer.xy.XYItemRenderer;
  54. import org.jfree.data.Range;
  55. import org.jfree.data.xy.XYDataset;
  56. import org.jfree.data.xy.XYSeries;
  57. import org.jfree.data.xy.XYSeriesCollection;
  58. import org.junit.Before;
  59. import org.junit.Test;
  60. /**
  61. * Some tests for an XY line chart.
  62. */
  63. public class XYLineChartTest {
  64. /** A chart. */
  65. private JFreeChart chart;
  66. /**
  67. * Common test setup.
  68. */
  69. @Before
  70. public void setUp() {
  71. this.chart = createChart();
  72. }
  73. /**
  74. * Draws the chart with a null info object to make sure that no exceptions
  75. * are thrown (a problem that was occurring at one point).
  76. */
  77. @Test
  78. public void testDrawWithNullInfo() {
  79. try {
  80. BufferedImage image = new BufferedImage(200 , 100,
  81. BufferedImage.TYPE_INT_RGB);
  82. Graphics2D g2 = image.createGraphics();
  83. this.chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null,
  84. null);
  85. g2.dispose();
  86. }
  87. catch (Exception e) {
  88. fail("No exception should be triggered.");
  89. }
  90. }
  91. /**
  92. * Replaces the dataset and checks that it has changed as expected.
  93. */
  94. @Test
  95. public void testReplaceDataset() {
  96. // create a dataset...
  97. XYSeries series1 = new XYSeries("Series 1");
  98. series1.add(10.0, 10.0);
  99. series1.add(20.0, 20.0);
  100. series1.add(30.0, 30.0);
  101. XYDataset dataset = new XYSeriesCollection(series1);
  102. LocalListener l = new LocalListener();
  103. this.chart.addChangeListener(l);
  104. XYPlot plot = (XYPlot) this.chart.getPlot();
  105. plot.setDataset(dataset);
  106. assertEquals(true, l.flag);
  107. ValueAxis axis = plot.getRangeAxis();
  108. Range range = axis.getRange();
  109. assertTrue("Expecting the lower bound of the range to be around 10: "
  110. + range.getLowerBound(), range.getLowerBound() <= 10);
  111. assertTrue("Expecting the upper bound of the range to be around 30: "
  112. + range.getUpperBound(), range.getUpperBound() >= 30);
  113. }
  114. /**
  115. * Check that setting a tool tip generator for a series does override the
  116. * default generator.
  117. */
  118. @Test
  119. public void testSetSeriesToolTipGenerator() {
  120. XYPlot plot = (XYPlot) this.chart.getPlot();
  121. XYItemRenderer renderer = plot.getRenderer();
  122. StandardXYToolTipGenerator tt = new StandardXYToolTipGenerator();
  123. renderer.setSeriesToolTipGenerator(0, tt);
  124. XYToolTipGenerator tt2 = renderer.getToolTipGenerator(0, 0);
  125. assertTrue(tt2 == tt);
  126. }
  127. /**
  128. * Create a horizontal bar chart with sample data in the range -3 to +3.
  129. *
  130. * @return The chart.
  131. */
  132. private static JFreeChart createChart() {
  133. XYSeries series1 = new XYSeries("Series 1");
  134. series1.add(1.0, 1.0);
  135. series1.add(2.0, 2.0);
  136. series1.add(3.0, 3.0);
  137. XYDataset dataset = new XYSeriesCollection(series1);
  138. return ChartFactory.createXYLineChart("XY Line Chart", "Domain",
  139. "Range", dataset);
  140. }
  141. /**
  142. * A chart change listener.
  143. *
  144. */
  145. static class LocalListener implements ChartChangeListener {
  146. /** A flag. */
  147. private boolean flag = false;
  148. /**
  149. * Event handler.
  150. *
  151. * @param event the event.
  152. */
  153. @Override
  154. public void chartChanged(ChartChangeEvent event) {
  155. this.flag = true;
  156. }
  157. }
  158. }