swt/chart/SwtJsBarChart.java

   1 package org.argeo.app.swt.chart;
   2
   3 import java.io.StringWriter;
   4
   5 import org.eclipse.swt.widgets.Composite;
   6
   7 import jakarta.json.Json;
   8 import jakarta.json.stream.JsonGenerator;
   9
  10 public class SwtJsBarChart extends AbstractJsChart {
  11
  12         public SwtJsBarChart(String chartName, Composite parent, int style) {
  13                 super(chartName, parent, style);
  14         }
  15
  16         @Override
  17         protected String getJsImplementation() {
  18                 return "globalThis.argeo.app.chart.BarChart";
  19         }
  20
  21         public void setLabels(String[] labels) {
  22                 executeChartMethod("setLabels(%s)", toJsArray(labels));
  23         }
  24
  25         public void addDataset(String label, int[] values) {
  26                 executeChartMethod("addDataset('%s', %s)", label, toJsArray(values));
  27         }
  28
  29         public void setData(String[] labels, String label, int[] values) {
  30                 executeChartMethod("setData(%s, '%s', %s)", toJsArray(labels), label, toJsArray(values));
  31         }
  32
  33         public void setDatasets(String[] labels, String[] label, int[][] values) {
  34                 executeChartMethod("setDatasets(%s, %s)", toJsArray(labels), toDatasets(label, values));
  35         }
  36
  37         protected String toDatasets(String[] label, int[][] values) {
  38                 if (label.length != values.length)
  39                         throw new IllegalArgumentException("Arrays must have the same length");
  40                 StringWriter writer = new StringWriter();
  41                 JsonGenerator g = Json.createGenerator(writer);
  42                 g.writeStartArray();
  43                 for (int i = 0; i < label.length; i++) {
  44                         g.writeStartObject();
  45                         g.write("label", label[i]);
  46                         g.writeStartArray("data");
  47                         for (int j = 0; j < values[i].length; j++) {
  48                                 g.write(values[i][j]);
  49                         }
  50                         g.writeEnd();// data array
  51                         g.writeEnd();// dataset
  52                 }
  53                 g.writeEnd();
  54                 g.close();
  55                 return writer.toString();
  56         }
  57
  58         public void clearDatasets() {
  59                 executeChartMethod("clearDatasets()");
  60         }
  61 }