Création d un graphique en secteurs avec lignes de leader utilisant JavaScript via C++
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Cet article explique comment créer un graphique en secteurs avec lignes de leader à partir de zéro en utilisant l’API Aspose.Cells for JavaScript via C++. Dans Excel, l’option ‘Afficher les lignes de leader’ est activée par défaut, donc lorsque vous créez un graphique en secteurs dans Excel, les lignes de leader sont affichées. Cependant, lors de la création d’un graphique similaire avec l’API Aspose.Cells, vous devez explicitement définir la propriété Series.hasLeaderLines.
Pour démontrer l’utilisation de Aspose.Cells for JavaScript via API C++ pour créer un graphique en secteurs avec lignes de guide, nous commencerons par créer un nouveau Workbook et saisir quelques données qui serviront de source de données de la série. Une fois les données en place, nous ajouterons un Chart de type ChartType.Pie à la collection de graphiques et définirons ses différents aspects pour obtenir la vue souhaitée du graphique.
<!DOCTYPE html>
<html>
<head>
<title>Create Pie Chart Example</title>
</head>
<body>
<h1>Create Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, ChartType, LabelPositionType, DataLabelsSeparatorType } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Add two columns of data
worksheet.cells.get("A1").putValue("Retail");
worksheet.cells.get("A2").putValue("Services");
worksheet.cells.get("A3").putValue("Info & Communication");
worksheet.cells.get("A4").putValue("Transport Equip");
worksheet.cells.get("A5").putValue("Construction");
worksheet.cells.get("A6").putValue("Other Products");
worksheet.cells.get("A7").putValue("Wholesale");
worksheet.cells.get("A8").putValue("Land Transport");
worksheet.cells.get("A9").putValue("Air Transport");
worksheet.cells.get("A10").putValue("Electric Appliances");
worksheet.cells.get("A11").putValue("Securities");
worksheet.cells.get("A12").putValue("Textiles & Apparel");
worksheet.cells.get("A13").putValue("Machinery");
worksheet.cells.get("A14").putValue("Metal Products");
worksheet.cells.get("A15").putValue("Cash");
worksheet.cells.get("A16").putValue("Banks");
worksheet.cells.get("B1").putValue(10.4);
worksheet.cells.get("B2").putValue(5.2);
worksheet.cells.get("B3").putValue(6.4);
worksheet.cells.get("B4").putValue(10.4);
worksheet.cells.get("B5").putValue(7.9);
worksheet.cells.get("B6").putValue(4.1);
worksheet.cells.get("B7").putValue(3.5);
worksheet.cells.get("B8").putValue(5.7);
worksheet.cells.get("B9").putValue(3);
worksheet.cells.get("B10").putValue(14.7);
worksheet.cells.get("B11").putValue(3.6);
worksheet.cells.get("B12").putValue(2.8);
worksheet.cells.get("B13").putValue(7.8);
worksheet.cells.get("B14").putValue(2.4);
worksheet.cells.get("B15").putValue(1.8);
worksheet.cells.get("B16").putValue(10.1);
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(id);
// Set series data range
chart.nSeries.add("B1:B16", true);
// Set category data range
chart.nSeries.categoryData = "A1:A16";
// Turn off legend
chart.showLegend = false;
// Access data labels
const dataLabels = chart.nSeries.get(0).dataLabels;
// Turn on category names
dataLabels.showCategoryName = true;
// Turn on percentage format
dataLabels.showPercentage = true;
// Set position
dataLabels.position = LabelPositionType.OutsideEnd;
// Set separator
dataLabels.separatorType = DataLabelsSeparatorType.Comma;
// Saving the modified Excel file
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
resultDiv.innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Jusqu’à présent, nous avons créé un graphique circulaire et réglé ses différents aspects. Maintenant, nous allons activer les lignes de repère pour le graphique. Veuillez noter que pour afficher les lignes de repère, nous devons déplacer légèrement les étiquettes de données.
Le code suivant active les lignes de repère, actualise le graphique, puis calcule les positions des étiquettes de données pour les déplacer en conséquence.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Pie Chart Example</title>
</head>
<body>
<h1>Aspose.Cells Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, ChartType, LabelPositionType, DataLabelsSeparatorType } = AsposeCells;
const initPromise = AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
await initPromise;
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object by opening the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
const cells = worksheet.cells;
// Add two columns of data
cells.get("A1").value = "Retail";
cells.get("A2").value = "Services";
cells.get("A3").value = "Info & Communication";
cells.get("A4").value = "Transport Equip";
cells.get("A5").value = "Construction";
cells.get("A6").value = "Other Products";
cells.get("A7").value = "Wholesale";
cells.get("A8").value = "Land Transport";
cells.get("A9").value = "Air Transport";
cells.get("A10").value = "Electric Appliances";
cells.get("A11").value = "Securities";
cells.get("A12").value = "Textiles & Apparel";
cells.get("A13").value = "Machinery";
cells.get("A14").value = "Metal Products";
cells.get("A15").value = "Cash";
cells.get("A16").value = "Banks";
cells.get("B1").value = 10.4;
cells.get("B2").value = 5.2;
cells.get("B3").value = 6.4;
cells.get("B4").value = 10.4;
cells.get("B5").value = 7.9;
cells.get("B6").value = 4.1;
cells.get("B7").value = 3.5;
cells.get("B8").value = 5.7;
cells.get("B9").value = 3;
cells.get("B10").value = 14.7;
cells.get("B11").value = 3.6;
cells.get("B12").value = 2.8;
cells.get("B13").value = 7.8;
cells.get("B14").value = 2.4;
cells.get("B15").value = 1.8;
cells.get("B16").value = 10.1;
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(id);
// Set series data range
chart.nSeries.add("B1:B16", true);
// Set category data range
chart.nSeries.categoryData = "A1:A16";
// Turn off legend
chart.showLegend = false;
// Access data labels
const dataLabels = chart.nSeries.get(0).dataLabels;
// Turn on category names
dataLabels.showCategoryName = true;
// Turn on percentage format
dataLabels.showPercentage = true;
// Set position
dataLabels.position = LabelPositionType.OutsideEnd;
// Set separator
dataLabels.separatorType = DataLabelsSeparatorType.Comma;
// Turn on leader lines
chart.nSeries.get(0).hasLeaderLines = true;
// Calculate chart
chart.calculate();
// You need to move DataLabels a little leftward or rightward depending on their position to show leader lines
const DELTA = 100;
const series0 = chart.nSeries.get(0);
for (let i = 0; i < series0.points.count; i++) {
const pt = series0.points.get(i);
let X = pt.dataLabels.x;
// If it is greater than 2000, then move the X position a little right otherwise move the X position a little left
if (X > 2000)
pt.dataLabels.x = X + DELTA;
else
pt.dataLabels.x = X - DELTA;
}
// Save the modified Excel file and provide download link
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Enfin, le code suivant sauvegarde le graphique au format image et le classeur au format XLSX.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Create Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none; margin-right: 10px;">Download Excel File</a>
<a id="downloadImageLink" style="display: none;">Download Chart Image</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '';
// If a file is provided, load it. Otherwise create a new workbook in XLSX format.
let workbook;
if (fileInput.files && fileInput.files.length > 0) {
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
workbook = new Workbook(new Uint8Array(arrayBuffer));
} else {
workbook = new Workbook(AsposeCells.FileFormatType.Xlsx);
}
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Add two columns of data
worksheet.cells.get("A1").putValue("Retail");
worksheet.cells.get("A2").putValue("Services");
worksheet.cells.get("A3").putValue("Info & Communication");
worksheet.cells.get("A4").putValue("Transport Equip");
worksheet.cells.get("A5").putValue("Construction");
worksheet.cells.get("A6").putValue("Other Products");
worksheet.cells.get("A7").putValue("Wholesale");
worksheet.cells.get("A8").putValue("Land Transport");
worksheet.cells.get("A9").putValue("Air Transport");
worksheet.cells.get("A10").putValue("Electric Appliances");
worksheet.cells.get("A11").putValue("Securities");
worksheet.cells.get("A12").putValue("Textiles & Apparel");
worksheet.cells.get("A13").putValue("Machinery");
worksheet.cells.get("A14").putValue("Metal Products");
worksheet.cells.get("A15").putValue("Cash");
worksheet.cells.get("A16").putValue("Banks");
worksheet.cells.get("B1").putValue(10.4);
worksheet.cells.get("B2").putValue(5.2);
worksheet.cells.get("B3").putValue(6.4);
worksheet.cells.get("B4").putValue(10.4);
worksheet.cells.get("B5").putValue(7.9);
worksheet.cells.get("B6").putValue(4.1);
worksheet.cells.get("B7").putValue(3.5);
worksheet.cells.get("B8").putValue(5.7);
worksheet.cells.get("B9").putValue(3);
worksheet.cells.get("B10").putValue(14.7);
worksheet.cells.get("B11").putValue(3.6);
worksheet.cells.get("B12").putValue(2.8);
worksheet.cells.get("B13").putValue(7.8);
worksheet.cells.get("B14").putValue(2.4);
worksheet.cells.get("B15").putValue(1.8);
worksheet.cells.get("B16").putValue(10.1);
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(AsposeCells.ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(id);
// Set series data range
chart.nSeries.add("B1:B16", true);
// Set category data range
chart.nSeries.categoryData = "A1:A16";
// Turn off legend
chart.showLegend = false;
// Access data labels
const dataLabels = chart.nSeries.get(0).dataLabels;
// Turn on category names
dataLabels.showCategoryName = true;
// Turn on percentage format
dataLabels.showPercentage = true;
// Set position
dataLabels.position = AsposeCells.LabelPositionType.OutsideEnd;
// Set separator
dataLabels.separatorType = AsposeCells.DataLabelsSeparatorType.Comma;
// In order to save the chart image, create an instance of ImageOrPrintOptions
const anOption = new AsposeCells.ImageOrPrintOptions();
// Set image format
anOption.imageType = AsposeCells.ImageType.Png;
// Set resolution
anOption.horizontalResolution = 200;
anOption.verticalResolution = 200;
// Render chart to image (returns image byte array in browser)
const imageData = chart.toImage(anOption);
const imageBlob = new Blob([imageData], { type: 'image/png' });
const downloadImageLink = document.getElementById('downloadImageLink');
downloadImageLink.href = URL.createObjectURL(imageBlob);
downloadImageLink.download = 'output_out.png';
downloadImageLink.style.display = 'inline-block';
downloadImageLink.textContent = 'Download Chart Image';
// Save the workbook to see chart inside the Excel
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output_out.xlsx';
downloadLink.style.display = 'inline-block';
downloadLink.textContent = 'Download Excel File';
resultDiv.innerHTML = '<p style="color: green;">Chart created and files are ready. Click the download links to get the results.</p>';
});
</script>
</html>
| Diagramme circulaire résultant |
|---|
 |
Sujets avancés
- Couleurs de tranche personnalisées dans le diagramme circulaire
- Savoir si les points de données sont dans le deuxième diagramme circulaire ou dans une barre sur un diagramme de deux ou trois cercles ou sur un diagramme à barres de deux ou trois cercles