Comment créer un graphique en cascade avec Node.js via C++

Les API Aspose.Cells permettent de créer un graphique en cascades avec l’aide du graphique linéaire. L’API permet également de personnaliser l’apparence du graphique pour lui donner la forme d’une cascade en réglant les propriétés Series.getUpBars() et Series.getDownBars().

Le code ci-dessous montre comment utiliser Aspose.Cells for Node.js via C++ pour créer un graphique en cascades à partir de zéro.

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "sample.xlsx");
// Create an instance of Workbook
const workbook = new AsposeCells.Workbook();

// Retrieve the first Worksheet in Workbook
const worksheet = workbook.getWorksheets().get(0);

// Retrieve the Cells of the first Worksheet
const cells = worksheet.getCells();

// Input some data which chart will use as source
cells.get("A1").putValue("Previous Year");
cells.get("A2").putValue("January");
cells.get("A3").putValue("March");
cells.get("A4").putValue("August");
cells.get("A5").putValue("October");
cells.get("A6").putValue("Current Year");

cells.get("B1").putValue(8.5);
cells.get("B2").putValue(1.5);
cells.get("B3").putValue(7.5);
cells.get("B4").putValue(7.5);
cells.get("B5").putValue(8.5);
cells.get("B6").putValue(3.5);

cells.get("C1").putValue(1.5);
cells.get("C2").putValue(4.5);
cells.get("C3").putValue(3.5);
cells.get("C4").putValue(9.5);
cells.get("C5").putValue(7.5);
cells.get("C6").putValue(9.5);

// Add a Chart of type Waterfall in same worksheet as of data
const idx = worksheet.getCharts().add(AsposeCells.ChartType.Waterfall, 4, 4, 25, 13);

// Retrieve the Chart object
const chart = worksheet.getCharts().get(idx);

// Add Series
chart.getNSeries().add("$B$1:$C$6", true);

// Add Category Data
chart.getNSeries().setCategoryData("$A$1:$A$6");

// Series has Up Down Bars
chart.getNSeries().get(0).setHasUpDownBars(true);

// Set the colors of Up and Down Bars
chart.getNSeries().get(0).getUpBars().getArea().setForegroundColor(AsposeCells.Color.Green);
chart.getNSeries().get(0).getDownBars().getArea().setForegroundColor(AsposeCells.Color.Red);

// Make both Series Lines invisible
chart.getNSeries().get(0).getBorder().setIsVisible(false);
chart.getNSeries().get(1).getBorder().setIsVisible(false);

// Set the Plot Area Formatting Automatic
chart.getPlotArea().getArea().setFormatting(AsposeCells.FormattingType.Automatic);

// Delete the Legend
chart.getLegend().getLegendEntries().get(0).setIsDeleted(true);
chart.getLegend().getLegendEntries().get(1).setIsDeleted(true);

// Save the workbook
workbook.save(path.join(dataDir, "output_out.xlsx"));

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