Working JavaScript charts

[gpl/argeo-suite.git] / swt / org.argeo.app.swt / src / org / argeo / app / swt / chart / SwtJsBarChart.java

diff --git a/swt/org.argeo.app.swt/src/org/argeo/app/swt/chart/SwtJsBarChart.java b/swt/org.argeo.app.swt/src/org/argeo/app/swt/chart/SwtJsBarChart.java
new file mode 100644 (file)
index 0000000..332d0eb
--- /dev/null
+++ b/swt/org.argeo.app.swt/src/org/argeo/app/swt/chart/SwtJsBarChart.java
@@ -0,0 +1,61 @@
+package org.argeo.app.swt.chart;
+
+import java.io.StringWriter;
+
+import org.eclipse.swt.widgets.Composite;
+
+import jakarta.json.Json;
+import jakarta.json.stream.JsonGenerator;
+
+public class SwtJsBarChart extends AbstractJsChart {
+
+       public SwtJsBarChart(String chartName, Composite parent, int style) {
+               super(chartName, parent, style);
+       }
+
+       @Override
+       protected String getJsImplementation() {
+               return "globalThis.argeo.app.chart.BarChart";
+       }
+
+       public void setLabels(String[] labels) {
+               callMethod(getJsChartVar(), "setLabels(%s)", toJsArray(labels));
+       }
+
+       public void addDataset(String label, int[] values) {
+               callMethod(getJsChartVar(), "addDataset('%s', %s)", label, toJsArray(values));
+       }
+
+       public void setData(String[] labels, String label, int[] values) {
+               callMethod(getJsChartVar(), "setData(%s, '%s', %s)", toJsArray(labels), label, toJsArray(values));
+       }
+
+       public void setDatasets(String[] labels, String[] label, int[][] values) {
+               callMethod(getJsChartVar(), "setDatasets(%s, %s)", toJsArray(labels), toDatasets(label, values));
+       }
+
+       protected String toDatasets(String[] label, int[][] values) {
+               if (label.length != values.length)
+                       throw new IllegalArgumentException("Arrays must have the same length");
+               StringWriter writer = new StringWriter();
+               JsonGenerator g = Json.createGenerator(writer);
+               g.writeStartArray();
+               for (int i = 0; i < label.length; i++) {
+                       g.writeStartObject();
+                       g.write("label", label[i]);
+                       g.writeStartArray("data");
+                       for (int j = 0; j < values[i].length; j++) {
+                               g.write(values[i][j]);
+                       }
+                       g.writeEnd();// data array
+                       g.writeEnd();// dataset
+               }
+               g.writeEnd();
+               g.close();
+               return writer.toString();
+       }
+
+       public void clearDatasets() {
+               callMethod(getJsChartVar(), "clearDatasets()");
+       }
+}