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package org.apache.poi.examples.xslf;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.ooxml.POIXMLDocumentPart;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xddf.usermodel.chart.AxisOrientation;
import org.apache.poi.xddf.usermodel.chart.AxisPosition;
import org.apache.poi.xddf.usermodel.chart.BarDirection;
import org.apache.poi.xddf.usermodel.chart.XDDFBarChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSourcesFactory;
import org.apache.poi.xddf.usermodel.chart.XDDFNumericalDataSource;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFChart;
import org.apache.poi.xslf.usermodel.XSLFSlide;
/**
* Build a bar chart from a template pptx
*/
@SuppressWarnings({"java:S106","java:S4823","java:S1192"})
public final class BarChartDemo {
private BarChartDemo() {}
private static void usage(){
System.out.println("Usage: BarChartDemo ");
System.out.println(" bar-chart-template.pptx template with a bar chart");
System.out.println(" bar-chart-data.txt the model to set. First line is chart title, " +
"then go pairs {axis-label value}");
}
public static void main(String[] args) throws Exception {
if(args.length < 2) {
usage();
return;
}
try (FileInputStream argIS = new FileInputStream(args[0]);
BufferedReader modelReader = Files.newBufferedReader(Paths.get(args[1]), StandardCharsets.UTF_8)) {
String chartTitle = modelReader.readLine(); // first line is chart title
String seriesText = modelReader.readLine();
String[] series = seriesText == null ? new String[0] : seriesText.split(",");
// Category Axis Data
List listLanguages = new ArrayList<>(10);
// Values
List listCountries = new ArrayList<>(10);
List listSpeakers = new ArrayList<>(10);
// set model
String ln;
while((ln = modelReader.readLine()) != null) {
String[] vals = ln.split(",");
listCountries.add(Double.valueOf(vals[0]));
listSpeakers.add(Double.valueOf(vals[1]));
listLanguages.add(vals[2]);
}
String[] categories = listLanguages.toArray(new String[0]);
Double[] values1 = listCountries.toArray(new Double[0]);
Double[] values2 = listSpeakers.toArray(new Double[0]);
try (XMLSlideShow pptx = new XMLSlideShow(argIS)) {
XSLFSlide slide = pptx.getSlides().get(0);
setBarData(findChart(slide), chartTitle, series, categories, values1, values2);
XSLFChart chart = findChart(pptx.createSlide().importContent(slide));
setColumnData(chart, "Column variant");
// save the result
try (OutputStream out = new FileOutputStream("bar-chart-demo-output.pptx")) {
pptx.write(out);
}
}
}
}
private static void setBarData(XSLFChart chart, String chartTitle, String[] series, String[] categories, Double[] values1, Double[] values2) {
final List data = chart.getChartSeries();
final XDDFBarChartData bar = (XDDFBarChartData) data.get(0);
final int numOfPoints = categories.length;
final String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, COLUMN_LANGUAGES, COLUMN_LANGUAGES));
final String valuesDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, COLUMN_COUNTRIES, COLUMN_COUNTRIES));
final String valuesDataRange2 = chart.formatRange(new CellRangeAddress(1, numOfPoints, COLUMN_SPEAKERS, COLUMN_SPEAKERS));
final XDDFDataSource categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, COLUMN_LANGUAGES);
final XDDFNumericalDataSource valuesData = XDDFDataSourcesFactory.fromArray(values1, valuesDataRange, COLUMN_COUNTRIES);
values1[6] = 16.0; // if you ever want to change the underlying data, it has to be done before building the data source
final XDDFNumericalDataSource valuesData2 = XDDFDataSourcesFactory.fromArray(values2, valuesDataRange2, COLUMN_SPEAKERS);
XDDFChartData.Series series1 = bar.getSeries(0);
series1.replaceData(categoriesData, valuesData);
series1.setTitle(series[0], chart.setSheetTitle(series[0], COLUMN_COUNTRIES));
XDDFChartData.Series series2 = bar.addSeries(categoriesData, valuesData2);
series2.setTitle(series[1], chart.setSheetTitle(series[1], COLUMN_SPEAKERS));
chart.plot(bar);
chart.setTitleText(chartTitle);
// chart.setTitleOverlay(overlay);
// adjust font size for readability
bar.getCategoryAxis().getOrAddTextProperties().setFontSize(11.5);
chart.getTitle().getOrAddTextProperties().setFontSize(18.2);
}
private static void setColumnData(XSLFChart chart, String chartTitle) {
// Series Text
List series = chart.getChartSeries();
XDDFBarChartData bar = (XDDFBarChartData) series.get(0);
// in order to transform a bar chart into a column chart, you just need to change the bar direction
bar.setBarDirection(BarDirection.COL);
// looking for "Stacked Bar Chart"? uncomment the following line
// bar.setBarGrouping(BarGrouping.STACKED);
// additionally, you can adjust the axes
bar.getCategoryAxis().setOrientation(AxisOrientation.MAX_MIN);
bar.getValueAxes().get(0).setPosition(AxisPosition.TOP);
}
private static XSLFChart findChart(XSLFSlide slide) {
// find chart in the slide
XSLFChart chart = null;
for(POIXMLDocumentPart part : slide.getRelations()){
if(part instanceof XSLFChart){
chart = (XSLFChart) part;
break;
}
}
if(chart == null) {
throw new IllegalStateException("chart not found in the template");
}
return chart;
}
private static final int COLUMN_LANGUAGES = 0;
private static final int COLUMN_COUNTRIES = 1;
private static final int COLUMN_SPEAKERS = 2;
}