Other Beta jFreeChart wrapper (starting with one Charttype)

DonManfred

Expert
Licensed User
Longtime User
As a followup to a previously posted question i now started to do a wrap on jFreeChart (totally incomplete! :D)
just to check if i get this thing working. It is using java awt and in the wrapper are a lot of old code i wrote in the past and never published.

Feel free to have a look and participate with this project if you can/want ;-)

Notes:
- It is of really help to have the documentation of jFreeChart buyed. All the java examples are in code available to learn from how something works.
- This is following another way than B4J is using. Anything you add to a "Window" must be a java awt component!
- As of now you can not mix the content with a b4x layout. At least i do not know how. I got it working with awt components so far.
- This Library is fully experimental! I do give no warranty to further develop it. I´ll release the source of it in this case for sure ;-)
As of today i do have some time and i do further wrapping. We´ll see what´s needed.

Snap1.png


 

Attachments

  • jFreeChartEx.zip
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  • jFreeChartV0.01.zip
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Last edited:

Johan Schoeman

Expert
Licensed User
Longtime User
Just wanted to see if I could "kick start" one of the samples by making use of inline Java code (jfreechart-fx):
1. You need to download and extract the jars from here. Copy the extracted jars to you B4J additional library folder.
2. Sample projects are here

B4X:
#AdditionalJar: jfreechart-1.5.1
#AdditionalJar: org.jfree.chart.fx-2.0
#AdditionalJar: org.jfree.fxgraphics2d-2.1

Have "panel beated" the code a bit to add the mouse events that are logged in the B4J log.

Check the B4J log when moving the mouse over the chart

1.png



1637492123297.png


Lots of work to do in order to make use of this in B4J.....I will only do some charts for personal use that might be useful for some project that I have not dreamt up yet. But in principal it can be done via inline Java code.

The chart is returned from the inline Java code as a ChartViewer object and assigned to a declared B4J JavaObject. The B4J JavaObject is added to a B4J pane that was added in the B4J designer.

Enjoy!

B4X:
#Region Project Attributes
    #MainFormWidth: 800
    #MainFormHeight: 600
#End Region

#AdditionalJar: jfreechart-1.5.1
#AdditionalJar: org.jfree.chart.fx-2.0
#AdditionalJar: org.jfree.fxgraphics2d-2.1

'JARS ARE COMING FROM HERE
'https://jar-download.com/maven-repository-class-search.php?search_box=org.jfree.chart.fx.ChartViewer

'SAMPLES ARE HERE:
'https://github.com/jfree/jfree-fxdemos/tree/master/src/main/java/org/jfree/chart3d/fx/demo

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI

    Private Pane1 As Pane
   
    Dim nativeMe, mygraph As JavaObject
   
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
   
    nativeMe = Me
   
    mygraph = nativeMe.RunMethod("drawChart", Null)
   
    Pane1.AddNode(mygraph, 0, 0, Pane1.Width, Pane1.Height)
   
End Sub

#if Java

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.block.BlockBorder;
import org.jfree.chart.fx.ChartViewer;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.ui.HorizontalAlignment;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;

import org.jfree.chart.entity.ChartEntity;
import org.jfree.chart.entity.LegendItemEntity;
import org.jfree.chart.entity.XYItemEntity;
import org.jfree.chart.fx.interaction.ChartMouseEventFX;
import org.jfree.chart.fx.interaction.ChartMouseListenerFX;
import org.jfree.chart.labels.StandardXYToolTipGenerator;

import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

import java.util.Calendar;

    private static XYDataset createDataset() {

        TimeSeries s1 = new TimeSeries("Indicator Price");
        s1.add(new Month(1, 2010), 126.80);
        s1.add(new Month(2, 2010), 123.37);
        s1.add(new Month(3, 2010), 125.30);
        s1.add(new Month(4, 2010), 126.89);
        s1.add(new Month(5, 2010), 128.10);
        s1.add(new Month(6, 2010), 142.20);
        s1.add(new Month(7, 2010), 153.41);
        s1.add(new Month(8, 2010), 157.46);
        s1.add(new Month(9, 2010), 163.61);
        s1.add(new Month(10, 2010), 161.56);
        s1.add(new Month(11, 2010), 173.90);
        s1.add(new Month(12, 2010), 184.26);
        s1.add(new Month(1, 2011), 197.35);
        s1.add(new Month(2, 2011), 216.03);
        s1.add(new Month(3, 2011), 224.33);
        s1.add(new Month(4, 2011), 231.24);
        s1.add(new Month(5, 2011), 227.97);
        s1.add(new Month(6, 2011), 215.58);
        s1.add(new Month(7, 2011), 210.36);
        s1.add(new Month(8, 2011), 212.19);
        s1.add(new Month(9, 2011), 213.04);
        s1.add(new Month(10, 2011), 193.90);
        s1.add(new Month(11, 2011), 193.66);
        s1.add(new Month(12, 2011), 189.02);
        s1.add(new Month(1, 2012), 188.90);
        s1.add(new Month(2, 2012), 182.29);
        s1.add(new Month(3, 2012), 167.77);
        s1.add(new Month(4, 2012), 160.46);
        s1.add(new Month(5, 2012), 157.68);
        s1.add(new Month(6, 2012), 145.31);
        s1.add(new Month(7, 2012), 159.07);
        s1.add(new Month(8, 2012), 148.50);
        s1.add(new Month(9, 2012), 151.28);
        s1.add(new Month(10, 2012), 147.12);
        s1.add(new Month(11, 2012), 136.35);
        s1.add(new Month(12, 2012), 131.31);
        s1.add(new Month(1, 2013), 135.38);
        s1.add(new Month(2, 2013), 131.51);
        s1.add(new Month(3, 2013), 131.38);

        TimeSeries s2 = new TimeSeries("Columbian Milds");
        s2.add(new Month(1, 2010), 207.51);
        s2.add(new Month(2, 2010), 204.71);
        s2.add(new Month(3, 2010), 205.71);
        s2.add(new Month(4, 2010), 200.00);
        s2.add(new Month(5, 2010), 200.54);
        s2.add(new Month(6, 2010), 224.49);
        s2.add(new Month(7, 2010), 235.52);
        s2.add(new Month(8, 2010), 243.98);
        s2.add(new Month(9, 2010), 247.77);
        s2.add(new Month(10, 2010), 230.02);
        s2.add(new Month(11, 2010), 244.02);
        s2.add(new Month(12, 2010), 261.97);
        s2.add(new Month(1, 2011), 279.88);
        s2.add(new Month(2, 2011), 296.44);
        s2.add(new Month(3, 2011), 300.68);
        s2.add(new Month(4, 2011), 312.95);
        s2.add(new Month(5, 2011), 302.17);
        s2.add(new Month(6, 2011), 287.95);
        s2.add(new Month(7, 2011), 285.21);
        s2.add(new Month(8, 2011), 286.97);
        s2.add(new Month(9, 2011), 287.54);
        s2.add(new Month(10, 2011), 257.66);
        s2.add(new Month(11, 2011), 256.99);
        s2.add(new Month(12, 2011), 251.60);
        s2.add(new Month(1, 2012), 255.91);
        s2.add(new Month(2, 2012), 244.14);
        s2.add(new Month(3, 2012), 222.84);
        s2.add(new Month(4, 2012), 214.46);
        s2.add(new Month(5, 2012), 207.32);
        s2.add(new Month(6, 2012), 184.67);
        s2.add(new Month(7, 2012), 202.56);
        s2.add(new Month(8, 2012), 187.14);
        s2.add(new Month(9, 2012), 190.10);
        s2.add(new Month(10, 2012), 181.39);
        s2.add(new Month(11, 2012), 170.08);
        s2.add(new Month(12, 2012), 164.40);
        s2.add(new Month(1, 2013), 169.19);
        s2.add(new Month(2, 2013), 161.70);
        s2.add(new Month(3, 2013), 161.53);
       
        TimeSeries s3 = new TimeSeries("Other Milds");
        s3.add(new Month(1, 2010), 158.90);
        s3.add(new Month(2, 2010), 157.86);
        s3.add(new Month(3, 2010), 164.50);
        s3.add(new Month(4, 2010), 169.55);
        s3.add(new Month(5, 2010), 173.38);
        s3.add(new Month(6, 2010), 190.90);
        s3.add(new Month(7, 2010), 203.21);
        s3.add(new Month(8, 2010), 211.59);
        s3.add(new Month(9, 2010), 222.71);
        s3.add(new Month(10, 2010), 217.64);
        s3.add(new Month(11, 2010), 233.48);
        s3.add(new Month(12, 2010), 248.17);
        s3.add(new Month(1, 2011), 263.77);
        s3.add(new Month(2, 2011), 287.89);
        s3.add(new Month(3, 2011), 292.07);
        s3.add(new Month(4, 2011), 300.12);
        s3.add(new Month(5, 2011), 291.09);
        s3.add(new Month(6, 2011), 274.98);
        s3.add(new Month(7, 2011), 268.02);
        s3.add(new Month(8, 2011), 270.44);
        s3.add(new Month(9, 2011), 274.88);
        s3.add(new Month(10, 2011), 247.82);
        s3.add(new Month(11, 2011), 245.09);
        s3.add(new Month(12, 2011), 236.71);
        s3.add(new Month(1, 2012), 237.21);
        s3.add(new Month(2, 2012), 224.16);
        s3.add(new Month(3, 2012), 201.26);
        s3.add(new Month(4, 2012), 191.45);
        s3.add(new Month(5, 2012), 184.65);
        s3.add(new Month(6, 2012), 168.69);
        s3.add(new Month(7, 2012), 190.45);
        s3.add(new Month(8, 2012), 174.82);
        s3.add(new Month(9, 2012), 178.98);
        s3.add(new Month(10, 2012), 173.32);
        s3.add(new Month(11, 2012), 159.91);
        s3.add(new Month(12, 2012), 152.74);
        s3.add(new Month(1, 2013), 157.29);
        s3.add(new Month(2, 2013), 149.46);
        s3.add(new Month(3, 2013), 149.78);
       
        TimeSeries s4 = new TimeSeries("Brazilian Naturals");
        s4.add(new Month(1, 2010), 131.67);
        s4.add(new Month(2, 2010), 124.57);
        s4.add(new Month(3, 2010), 126.21);
        s4.add(new Month(4, 2010), 126.07);
        s4.add(new Month(5, 2010), 127.45);
        s4.add(new Month(6, 2010), 143.20);
        s4.add(new Month(7, 2010), 156.87);
        s4.add(new Month(8, 2010), 163.21);
        s4.add(new Month(9, 2010), 175.15);
        s4.add(new Month(10, 2010), 175.38);
        s4.add(new Month(11, 2010), 190.62);
        s4.add(new Month(12, 2010), 204.25);
        s4.add(new Month(1, 2011), 219.77);
        s4.add(new Month(2, 2011), 247.00);
        s4.add(new Month(3, 2011), 260.98);
        s4.add(new Month(4, 2011), 273.40);
        s4.add(new Month(5, 2011), 268.66);
        s4.add(new Month(6, 2011), 250.59);
        s4.add(new Month(7, 2011), 245.69);
        s4.add(new Month(8, 2011), 249.83);
        s4.add(new Month(9, 2011), 255.64);
        s4.add(new Month(10, 2011), 234.28);
        s4.add(new Month(11, 2011), 236.75);
        s4.add(new Month(12, 2011), 228.79);
        s4.add(new Month(1, 2012), 228.21);
        s4.add(new Month(2, 2012), 215.40);
        s4.add(new Month(3, 2012), 192.03);
        s4.add(new Month(4, 2012), 180.90);
        s4.add(new Month(5, 2012), 174.17);
        s4.add(new Month(6, 2012), 156.17);
        s4.add(new Month(7, 2012), 175.98);
        s4.add(new Month(8, 2012), 160.05);
        s4.add(new Month(9, 2012), 166.53);
        s4.add(new Month(10, 2012), 161.20);
        s4.add(new Month(11, 2012), 148.25);
        s4.add(new Month(12, 2012), 140.69);
        s4.add(new Month(1, 2013), 145.17);
        s4.add(new Month(2, 2013), 136.63);
        s4.add(new Month(3, 2013), 133.61);
       
        TimeSeries s5 = new TimeSeries("Robustas");
        s5.add(new Month(1, 2010), 69.92);
        s5.add(new Month(2, 2010), 67.88);
        s5.add(new Month(3, 2010), 67.25);
        s5.add(new Month(4, 2010), 71.59);
        s5.add(new Month(5, 2010), 70.70);
        s5.add(new Month(6, 2010), 76.92);
        s5.add(new Month(7, 2010), 85.27);
        s5.add(new Month(8, 2010), 82.68);
        s5.add(new Month(9, 2010), 81.28);
        s5.add(new Month(10, 2010), 85.27);
        s5.add(new Month(11, 2010), 92.04);
        s5.add(new Month(12, 2010), 94.09);
        s5.add(new Month(1, 2011), 101.09);
        s5.add(new Month(2, 2011), 109.35);
        s5.add(new Month(3, 2011), 118.13);
        s5.add(new Month(4, 2011), 117.37);
        s5.add(new Month(5, 2011), 121.98);
        s5.add(new Month(6, 2011), 117.95);
        s5.add(new Month(7, 2011), 112.73);
        s5.add(new Month(8, 2011), 112.07);
        s5.add(new Month(9, 2011), 106.06);
        s5.add(new Month(10, 2011), 98.10);
        s5.add(new Month(11, 2011), 97.24);
        s5.add(new Month(12, 2011), 98.41);
        s5.add(new Month(1, 2012), 96.72);
        s5.add(new Month(2, 2012), 101.93);
        s5.add(new Month(3, 2012), 103.57);
        s5.add(new Month(4, 2012), 101.80);
        s5.add(new Month(5, 2012), 106.88);
        s5.add(new Month(6, 2012), 105.70);
        s5.add(new Month(7, 2012), 107.06);
        s5.add(new Month(8, 2012), 106.52);
        s5.add(new Month(9, 2012), 104.95);
        s5.add(new Month(10, 2012), 104.47);
        s5.add(new Month(11, 2012), 97.67);
        s5.add(new Month(12, 2012), 96.59);
        s5.add(new Month(1, 2013), 99.69);
        s5.add(new Month(2, 2013), 104.03);
        s5.add(new Month(3, 2013), 106.26);
     
        TimeSeries s6 = new TimeSeries("Futures (London)");
        s6.add(new Month(1, 2010), 62.66);
        s6.add(new Month(2, 2010), 60.37);
        s6.add(new Month(3, 2010), 58.64);
        s6.add(new Month(4, 2010), 62.21);
        s6.add(new Month(5, 2010), 62.46);
        s6.add(new Month(6, 2010), 69.72);
        s6.add(new Month(7, 2010), 78.17);
        s6.add(new Month(8, 2010), 78.42);
        s6.add(new Month(9, 2010), 75.87);
        s6.add(new Month(10, 2010), 80.08);
        s6.add(new Month(11, 2010), 86.40);
        s6.add(new Month(12, 2010), 88.70);
        s6.add(new Month(1, 2011), 96.02);
        s6.add(new Month(2, 2011), 104.53);
        s6.add(new Month(3, 2011), 111.36);
        s6.add(new Month(4, 2011), 111.34);
        s6.add(new Month(5, 2011), 116.76);
        s6.add(new Month(6, 2011), 110.51);
        s6.add(new Month(7, 2011), 103.36);
        s6.add(new Month(8, 2011), 102.71);
        s6.add(new Month(9, 2011), 96.10);
        s6.add(new Month(10, 2011), 88.64);
        s6.add(new Month(11, 2011), 85.78);
        s6.add(new Month(12, 2011), 87.65);
        s6.add(new Month(1, 2012), 84.19);
        s6.add(new Month(2, 2012), 88.69);
        s6.add(new Month(3, 2012), 91.37);
        s6.add(new Month(4, 2012), 91.81);
        s6.add(new Month(5, 2012), 96.82);
        s6.add(new Month(6, 2012), 94.75);
        s6.add(new Month(7, 2012), 96.14);
        s6.add(new Month(8, 2012), 96.12);
        s6.add(new Month(9, 2012), 94.65);
        s6.add(new Month(10, 2012), 94.66);
        s6.add(new Month(11, 2012), 87.32);
        s6.add(new Month(12, 2012), 85.94);
        s6.add(new Month(1, 2013), 88.85);
        s6.add(new Month(2, 2013), 94.41);
        s6.add(new Month(3, 2013), 97.22);
       
        TimeSeries s7 = new TimeSeries("Futures (New York)");
        s7.add(new Month(1, 2010), 142.76);
        s7.add(new Month(2, 2010), 134.35);
        s7.add(new Month(3, 2010), 134.97);
        s7.add(new Month(4, 2010), 135.12);
        s7.add(new Month(5, 2010), 135.81);
        s7.add(new Month(6, 2010), 152.36);
        s7.add(new Month(7, 2010), 165.23);
        s7.add(new Month(8, 2010), 175.10);
        s7.add(new Month(9, 2010), 187.80);
        s7.add(new Month(10, 2010), 190.43);
        s7.add(new Month(11, 2010), 206.92);
        s7.add(new Month(12, 2010), 221.51);
        s7.add(new Month(1, 2011), 238.05);
        s7.add(new Month(2, 2011), 261.41);
        s7.add(new Month(3, 2011), 274.10);
        s7.add(new Month(4, 2011), 285.58);
        s7.add(new Month(5, 2011), 277.72);
        s7.add(new Month(6, 2011), 262.52);
        s7.add(new Month(7, 2011), 255.90);
        s7.add(new Month(8, 2011), 260.39);
        s7.add(new Month(9, 2011), 261.39);
        s7.add(new Month(10, 2011), 236.74);
        s7.add(new Month(11, 2011), 235.25);
        s7.add(new Month(12, 2011), 227.23);
        s7.add(new Month(1, 2012), 227.50);
        s7.add(new Month(2, 2012), 212.09);
        s7.add(new Month(3, 2012), 188.78);
        s7.add(new Month(4, 2012), 181.75);
        s7.add(new Month(5, 2012), 176.50);
        s7.add(new Month(6, 2012), 159.93);
        s7.add(new Month(7, 2012), 183.20);
        s7.add(new Month(8, 2012), 169.77);
        s7.add(new Month(9, 2012), 175.36);
        s7.add(new Month(10, 2012), 170.43);
        s7.add(new Month(11, 2012), 155.72);
        s7.add(new Month(12, 2012), 149.58);
        s7.add(new Month(1, 2013), 154.28);
        s7.add(new Month(2, 2013), 144.89);
        s7.add(new Month(3, 2013), 141.43);
     
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(s1);
        dataset.addSeries(s2);
        dataset.addSeries(s3);      
        dataset.addSeries(s4);
        dataset.addSeries(s5);
        dataset.addSeries(s6);
        dataset.addSeries(s7);
        return dataset;
    }
   
    private static JFreeChart createChart(XYDataset dataset) {

        JFreeChart chart = ChartFactory.createTimeSeriesChart(
            "International Coffee Organisation : Coffee Prices",    // title
            null,             // x-axis label
            "US cents/lb",      // y-axis label
            dataset);

        String fontName = "Palatino";
        chart.getTitle().setFont(new Font(fontName, Font.BOLD, 18));
        chart.addSubtitle(new TextTitle("Source: http://www.ico.org/historical/2010-19/PDF/HIST-PRICES.pdf",
                new Font(fontName, Font.PLAIN, 14)));

        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setDomainPannable(true);
        plot.setRangePannable(true);
        plot.setDomainCrosshairVisible(true);
        plot.setRangeCrosshairVisible(true);
        plot.getDomainAxis().setLowerMargin(0.0);
        plot.getDomainAxis().setLabelFont(new Font(fontName, Font.BOLD, 10));
        plot.getDomainAxis().setTickLabelFont(new Font(fontName, Font.PLAIN, 10));
        plot.getRangeAxis().setLabelFont(new Font(fontName, Font.BOLD, 10));
        plot.getRangeAxis().setTickLabelFont(new Font(fontName, Font.PLAIN, 10));
        chart.getLegend().setItemFont(new Font(fontName, Font.PLAIN, 10));
        chart.getLegend().setFrame(BlockBorder.NONE);
        chart.getLegend().setHorizontalAlignment(HorizontalAlignment.CENTER);
        XYItemRenderer r = plot.getRenderer();
        if (r instanceof XYLineAndShapeRenderer) {
            XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
            renderer.setDefaultShapesVisible(true);
            renderer.setDrawSeriesLineAsPath(true);
            // set the default stroke for all series
            renderer.setAutoPopulateSeriesStroke(true);
            renderer.setDefaultStroke(new BasicStroke(4.0f));
            renderer.setSeriesPaint(0, Color.RED);
            renderer.setSeriesPaint(1, Color.YELLOW);
            renderer.setSeriesPaint(2, Color.MAGENTA);
            renderer.setSeriesPaint(3, Color.CYAN);
            renderer.setSeriesPaint(4, Color.BLUE);
            renderer.setSeriesPaint(5, Color.GREEN);
            renderer.setSeriesPaint(6, Color.GRAY);
        }
        return chart;
    }

    public static ChartViewer drawChart() {
        XYDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
        ChartViewer viewer = new ChartViewer(chart);

        viewer.addChartMouseListener(new ChartMouseListenerFX() {
            @Override
            public void chartMouseClicked(ChartMouseEventFX e) {
                ChartEntity ce = e.getEntity();
                if (ce instanceof XYItemEntity) {
                    XYItemEntity item = (XYItemEntity) ce;
                    XYDataset d=item.getDataset();
                      int s=item.getSeriesIndex();
                      int i=item.getItem();
                      long x=(long)d.getXValue(s,i);
                      double y=d.getYValue(s,i);
                     
                      Calendar calendar = Calendar.getInstance();
                      calendar.setTimeInMillis(x);

                      int mYear = calendar.get(Calendar.YEAR);
                      int mMonth = calendar.get(Calendar.MONTH);
                      int mDay = calendar.get(Calendar.DAY_OF_MONTH);      
                       
                      BA.Log("year = " + mYear + "    month = " + mMonth + "     day = " + mDay + "     y = " + y + "   series = " + s + "     item = " + i);          
                                   
                } else if (ce instanceof LegendItemEntity) {
                    LegendItemEntity item = (LegendItemEntity) ce;
                    Comparable key = item.getSeriesKey();
                } else {
                    for (int i = 0; i < dataset.getSeriesCount(); i++) {
                    }
                }
            }

            @Override
            public void chartMouseMoved(ChartMouseEventFX e) {
                ChartEntity ce = e.getEntity();
                if (ce instanceof XYItemEntity) {
                    XYItemEntity item = (XYItemEntity) ce;
                    XYDataset d=item.getDataset();
                      int s=item.getSeriesIndex();
                      int i=item.getItem();
                      long x=(long)d.getXValue(s,i);
                      double y=d.getYValue(s,i);
                     
                      Calendar calendar = Calendar.getInstance();
                      calendar.setTimeInMillis(x);

                      int mYear = calendar.get(Calendar.YEAR);
                      int mMonth = calendar.get(Calendar.MONTH);
                      int mDay = calendar.get(Calendar.DAY_OF_MONTH);      
                       
                      BA.Log("year = " + mYear + "    month = " + mMonth + "     day = " + mDay + "     y = " + y + "   series = " + s + "     item = " + i);          

                } else if (ce instanceof LegendItemEntity) {
                    LegendItemEntity item = (LegendItemEntity) ce;
                    Comparable key = item.getSeriesKey();
                } else {
                    for (int i = 0; i < dataset.getSeriesCount(); i++) {
                    }
                }          
            }
        });      
        return viewer;
    }

#End If
 

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DonManfred

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The chart is returned from the inline Java code as a ChartViewer object and assigned to a declared B4J JavaObject. The B4J JavaObject is added to a B4J pane that was added in the B4J designer.
you can try to add
B4X:
import anywheresoftware.b4j.objects.PaneWrapper.ConcretePaneWrapper;
[..]
    public ConcretePaneWrapper getAsPane() {
        return (ConcretePaneWrapper) AbsObjectWrapper.ConvertToWrapper(new ConcretePaneWrapper(), this.getObject());
    }
to return the generated Chart directly as Pane which you can add...
 
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