|
1
28 package net.sf.jasperreports.renderers;
29
30 import java.awt.geom.Rectangle2D  ;
31 import java.util.ArrayList ;
32 import java.util.Iterator ;
33 import java.util.List ;
34 import java.util.StringTokenizer ;
35
36 import net.sf.jasperreports.engine.JRConstants;
37 import net.sf.jasperreports.engine.JRException;
38 import net.sf.jasperreports.engine.JRImageMapRenderer;
39 import net.sf.jasperreports.engine.JRPrintHyperlink;
40 import net.sf.jasperreports.engine.JRPrintImageArea;
41 import net.sf.jasperreports.engine.JRPrintImageAreaHyperlink;
42
43 import org.jfree.chart.ChartRenderingInfo;
44 import org.jfree.chart.JFreeChart;
45 import org.jfree.chart.entity.ChartEntity;
46 import org.jfree.chart.entity.EntityCollection;
47
48
49
55 public abstract class JRAbstractChartImageMapRenderer extends JFreeChartRenderer implements JRImageMapRenderer
56 {
57
58 private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
59
60 public JRAbstractChartImageMapRenderer(JFreeChart chart)
61 {
62 super(chart);
63 }
64
65
66 public List getImageAreaHyperlinks(Rectangle2D renderingArea) throws JRException
67 {
68 ChartRenderingInfo renderingInfo = new ChartRenderingInfo();
70 getChart().createBufferedImage((int) renderingArea.getWidth(), (int) renderingArea.getHeight(), renderingInfo);
71
72 EntityCollection entityCollection = renderingInfo.getEntityCollection();
73 List areaHyperlinks = null;
74 if (entityCollection != null && entityCollection.getEntityCount() > 0)
75 {
76 areaHyperlinks = new ArrayList (entityCollection.getEntityCount());
77
78 for (Iterator it = entityCollection.iterator(); it.hasNext();)
79 {
80 ChartEntity entity = (ChartEntity) it.next();
81 JRPrintHyperlink printHyperlink = getEntityHyperlink(entity);
82 if (printHyperlink != null)
83 {
84 JRPrintImageArea area = getImageArea(entity);
85
86 JRPrintImageAreaHyperlink areaHyperlink = new JRPrintImageAreaHyperlink();
87 areaHyperlink.setArea(area);
88 areaHyperlink.setHyperlink(printHyperlink);
89 areaHyperlinks.add(areaHyperlink);
90 }
91 }
92 }
93
94 return areaHyperlinks;
95 }
96
97 protected JRPrintImageArea getImageArea(ChartEntity entity)
98 {
99 JRPrintImageArea area = new JRPrintImageArea();
100 area.setShape(JRPrintImageArea.getShape(entity.getShapeType()));
101
102 int[] coordinates = getCoordinates(entity);
103 if (coordinates != null)
104 {
105 area.setCoordinates(coordinates);
106 }
107 return area;
108 }
109
110 protected int[] getCoordinates(ChartEntity entity)
111 {
112 int[] coordinates = null;
113 String shapeCoords = entity.getShapeCoords();
114 if (shapeCoords != null && shapeCoords.length() > 0)
115 {
116 StringTokenizer tokens = new StringTokenizer (shapeCoords, ",");
117 coordinates = new int[tokens.countTokens()];
118 int idx = 0;
119 while (tokens.hasMoreTokens())
120 {
121 String coord = tokens.nextToken();
122 coordinates[idx] = Integer.parseInt(coord);
123 ++idx;
124 }
125 }
126 return coordinates;
127 }
128
129 protected abstract JRPrintHyperlink getEntityHyperlink(ChartEntity entity);
130 }
131 |
Popular Tags |
Java API By Example, From Geeks To Geeks.