Ajout de labels personnalisés aux points de données de la série du graphique avec C++

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Le code suivant crée un graphique de dispersion relié par des lignes avec des marqueurs de données puis ajoute des étiquettes personnalisées aux points de données de la série du graphique. Chaque étiquette personnalisée affiche le nom de la série et le nom du point. Vous pouvez utiliser tout autre texte à la place.

#include <iostream>
#include <sstream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;

int main()
{
    Aspose::Cells::Startup();

    // Output directory path
    U16String outDir(u"..\\Data\\02_OutputDirectory\\");
    U16String outputPath = outDir + u"output_out.xlsx";

    // Create workbook with XLSX format
    Workbook workbook(FileFormatType::Xlsx);
    Worksheet sheet = workbook.GetWorksheets().Get(0);

    // Populate data cells
    sheet.GetCells().Get(0, 0).PutValue(1);
    sheet.GetCells().Get(0, 1).PutValue(2);
    sheet.GetCells().Get(0, 2).PutValue(3);

    sheet.GetCells().Get(1, 0).PutValue(4);
    sheet.GetCells().Get(1, 1).PutValue(5);
    sheet.GetCells().Get(1, 2).PutValue(6);

    sheet.GetCells().Get(2, 0).PutValue(7);
    sheet.GetCells().Get(2, 1).PutValue(8);
    sheet.GetCells().Get(2, 2).PutValue(9);

    // Create scatter chart
    int32_t chartIndex = sheet.GetCharts().Add(ChartType::ScatterConnectedByLinesWithDataMarker, 5, 1, 24, 10);
    Chart chart = sheet.GetCharts().Get(chartIndex);

    // Configure chart titles
    chart.GetTitle().SetText(u"Test");
    chart.GetCategoryAxis().GetTitle().SetText(u"X-Axis");
    chart.GetValueAxis().GetTitle().SetText(u"Y-Axis");

    // Set category data range
    chart.GetNSeries().SetCategoryData(u"A1:C1");

    // Add first data series
    chart.GetNSeries().Add(u"A2:C2", false);
    Series series = chart.GetNSeries().Get(0);
    int32_t pointCount = series.GetPoints().GetCount();

    // Configure data labels for first series
    for (int32_t i = 0; i < pointCount; i++)
    {
        ChartPoint point = series.GetPoints().Get(i);
        std::wstringstream ws;
        ws << L"Series 1\nPoint " << i;
        U16String labelText(reinterpret_cast<const char16_t*>(ws.str().c_str()));
        point.GetDataLabels().SetText(labelText);
    }

    // Add second data series
    chart.GetNSeries().Add(u"A3:C3", false);
    series = chart.GetNSeries().Get(1);
    pointCount = series.GetPoints().GetCount();

    // Configure data labels for second series
    for (int32_t i = 0; i < pointCount; i++)
    {
        ChartPoint point = series.GetPoints().Get(i);
        std::wstringstream ws;
        ws << L"Series 2\nPoint " << i;
        U16String labelText(reinterpret_cast<const char16_t*>(ws.str().c_str()));
        point.GetDataLabels().SetText(labelText);
    }

    // Save workbook
    workbook.Save(outputPath, SaveFormat::Xlsx);
    std::cout << "Chart created successfully with data labels!" << std::endl;

    Aspose::Cells::Cleanup();
    return 0;
}
#include <Aspose.Cells.h>

using namespace Aspose::Cells;
using namespace Aspose::Cells::Charts;

void AddCustomLabels() {
    // Create workbook object
    Workbook workbook;

    // Access first worksheet
    Worksheet worksheet = workbook.GetWorksheets().Get(0);

    // Add sample data
    worksheet.GetCells().Get(u"A1").PutValue(u"X");
    worksheet.GetCells().Get(u"A2").PutValue(1);
    worksheet.GetCells().Get(u"A3").PutValue(2);
    worksheet.GetCells().Get(u"A4").PutValue(3);
    worksheet.GetCells().Get(u"B1").PutValue(u"Y");
    worksheet.GetCells().Get(u"B2").PutValue(4);
    worksheet.GetCells().Get(u"B3").PutValue(3);
    worksheet.GetCells().Get(u"B4").PutValue(2);
    worksheet.GetCells().Get(u"C1").PutValue(u"Point Name");
    worksheet.GetCells().Get(u"C2").PutValue(u"Point A");
    worksheet.GetCells().Get(u"C3").PutValue(u"Point B");
    worksheet.GetCells().Get(u"C4").PutValue(u"Point C");

    // Add chart
    int chartIndex = worksheet.GetCharts().Add(ChartType::ScatterConnectedByLinesWithDataMarker, 5, 0, 20, 8);
    Chart chart = worksheet.GetCharts().Get(chartIndex);

    // Set data source
    chart.GetNSeries().Add(u"=Sheet1!$B$2:$B$4", true);
    chart.GetNSeries().Get(0).SetXValues(u"=Sheet1!$A$2:$A$4");

    // Enable data labels
    DataLabels dataLabels = chart.GetNSeries().Get(0).GetDataLabels();
    dataLabels.SetShowValue(true);

    // Add custom labels
    int pointCount = chart.GetNSeries().Get(0).GetPoints().GetCount();
    for (int i = 0; i < pointCount; i++) {
        ChartPoint point = chart.GetNSeries().Get(0).GetPoints().Get(i);
        DataLabels dataLabel = point.GetDataLabels();
        dataLabel.SetText(
            u"Series: " + chart.GetNSeries().Get(0).GetName() + 
            u"\nPoint: " + worksheet.GetCells().Get(i + 1, 2).GetStringValue()
        );
    }

    // Save workbook
    workbook.Save(u"output.xlsx");
}