Crear gráfico de pastel con líneas de líder usando JavaScript vía C++
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Este artículo explica cómo crear un gráfico de pastel con líneas de líder desde cero usando la API Aspose.Cells for JavaScript vía C++. En Excel, la opción ‘Mostrar líneas de líder’ está configurada por defecto, por lo que cuando creas un gráfico de pastel en Excel, las líneas de líder se muestran. Sin embargo, al crear un gráfico similar con las API de Aspose.Cells, debes establecer explícitamente la propiedad Series.hasLeaderLines.
Para demostrar el uso de Aspose.Cells for JavaScript a través de la API de C++ para crear un gráfico circular con líneas de líder, primero crearemos un Workbook nuevo e ingresaremos algunos datos que servirán como fuente de datos de la serie. Una vez que los datos estén en su lugar, agregaremos un Chart de tipo ChartType.Pie a la colección de gráficos y configuraremos sus diferentes aspectos para obtener la vista de gráfico deseada.
<!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>
Hasta el momento hemos creado un gráfico circular y configurado sus diferentes aspectos. Ahora vamos a activar las líneas guía para el gráfico. Ten en cuenta que para mostrar las líneas guía, debemos mover un poco las etiquetas de datos.
El siguiente fragmento de código activa las líneas guía, actualiza el gráfico y luego calcula las posiciones de las etiquetas de datos para moverlas en consecuencia.
<!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>
Finalmente, el siguiente código guarda el gráfico en formato de imagen y el libro de trabajo en formato 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>
| Gráfico de Pastel Resultante |
|---|
 |
Temas avanzados
- Personalizar Colores de Sector en Gráfico de Pastel
- Encontrar si los Puntos de Datos están en el Segundo Pastel o Barra en un Gráfico de Pastel de Pastel o de Barra de Pastel