Doughnut Chart Data Labels Are Missing When Label Color Is Changed in Java

Aspose.Slides Product Family
,
1

I need to set the donut chart label to white color. My code below will work for default color for the chart label, but when I try to set the color to white, the label is not displaying. The same works for the Pie chart label.

Code for Donut chart:

import java.awt.Color;

import com.aspose.slides.ChartType;
import com.aspose.slides.FillType;
import com.aspose.slides.IChart;
import com.aspose.slides.IChartDataWorkbook;
import com.aspose.slides.IChartSeries;
import com.aspose.slides.NullableBool;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;

public class DonutChartTest {

  public static void main(String[] args) {
    // Create an instance of Presentation class
    Presentation pres = new Presentation();
    try {
      // Add chart with default data
      IChart chart =
          pres.getSlides().get_Item(0).getShapes().addChart(ChartType.Doughnut, 100, 100, 400, 400);

      // Setting chart Title
      chart.getChartTitle().addTextFrameForOverriding("Sample Title");
      chart.getChartTitle().getTextFrameForOverriding().getTextFrameFormat()
          .setCenterText(NullableBool.True);
      chart.getChartTitle().setHeight(20);
      chart.setTitle(true);

      // Setting the index of chart data sheet
      int defaultWorksheetIndex = 0;

      // Getting the chart data worksheet
      IChartDataWorkbook fact = chart.getChartData().getChartDataWorkbook();

      // Delete default generated series and categories
      chart.getChartData().getSeries().clear();
      chart.getChartData().getCategories().clear();

      // Adding new categories
      chart.getChartData().getCategories().add(fact.getCell(0, 1, 0, "First Qtr"));
      chart.getChartData().getCategories().add(fact.getCell(0, 2, 0, "2nd Qtr"));
      chart.getChartData().getCategories().add(fact.getCell(0, 3, 0, "3rd Qtr"));

      // Adding new series
      IChartSeries series =
          chart.getChartData().getSeries().add(fact.getCell(0, 0, 1, "Series 1"), chart.getType());
      
      //add by me: 
      series.getLabels().getDefaultDataLabelFormat().setShowPercentage(true);
      
      // Now populating series data
      series.getDataPoints()
          .addDataPointForDoughnutSeries(fact.getCell(defaultWorksheetIndex, 1, 1, 20));
      series.getDataPoints()
          .addDataPointForDoughnutSeries(fact.getCell(defaultWorksheetIndex, 2, 1, 50));
      series.getDataPoints()
          .addDataPointForDoughnutSeries(fact.getCell(defaultWorksheetIndex, 3, 1, 30));

      chart.getChartData().getSeriesGroups().get_Item(0).setDoughnutHoleSize((byte) 40);

      // series.getDataPoints()
      // .addDataPointForPieSeries(fact.getCell(defaultWorksheetIndex, 1, 1, 20));
      // series.getDataPoints()
      // .addDataPointForPieSeries(fact.getCell(defaultWorksheetIndex, 2, 1, 50));
      // series.getDataPoints()
      // .addDataPointForPieSeries(fact.getCell(defaultWorksheetIndex, 3, 1, 30));

      // set the label text color 
      // comment out the the following lines, the label is displayed in the donut chart
      series.getLabels().getDefaultDataLabelFormat().getTextFormat().getPortionFormat()
          .getFillFormat().setFillType(FillType.Solid);
      series.getLabels().getDefaultDataLabelFormat().getTextFormat().getPortionFormat()
          .getFillFormat().getSolidFillColor().setColor(Color.WHITE);

      series.getParentSeriesGroup().setColorVaried(true);
      pres.save("donutWhiteColorPercent.pptx", SaveFormat.Pptx);
    } finally {
      if (pres != null)
        pres.dispose();
    }
  }
}

donutChartLabel.7z (57.9 KB)

Please show me an example code how to apply the color change for the label.
Appreciate your help!

2

@liqingruan
Thank you for contacting support.
We will investigate your question and come back with the results.

3

@liqingruan,
I’ve reproduced the problem with changing color of the chart data labels and added a ticket with ID SLIDESJAVA-38928 to our issue tracking system. We apologize for any inconvenience. Our development team will investigate the case. You will be notified when a new release of Aspose.Slides with a fix is published.

It would be great if you could share the following additional information:

  • OS version on which the code was executed
  • JDK version in your app

We will then also test a solution in an environment similar to yours.

4

Windows 10
Java 8

5

@liqingruan,
Thank you for the additional information. I’ve forwarded it to our developers.

6

@Andrey_Potapov
Appreciate your help!

7

The issues you found earlier (filed as SLIDESJAVA-38928) have been resolved in Aspose.Slides for Java 25.12 (Maven, JAR).
You can check all fixes on the Release Notes page.
You can also find the latest version of our library on the Product Download page.