通过JavaScript和C++在工作表内将形状移到前面或后面
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可能的使用场景
当同一位置存在多种形状时，它们的可见性由z序位置决定。Aspose.Cells提供Shape.toFrontOrBack()方法，可以改变形状的z序位置。将形状送到最底层，用负数如-1、-2、-3等，想将形状置于最前面，用正数如1、2、3等。
在工作表内发送形状到最前或最后
以下示例代码解释了Shape.toFrontOrBack()方法的用法。请查看代码中使用的示例Excel文件以及由它生成的输出Excel文件。截图显示了代码在执行后对示例Excel文件的效果。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example - Send Shapes Front or Back</title>
</head>
<body>
<h1>Send Shapes to Front or Back 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 } = 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');
const downloadLink = document.getElementById('downloadLink');
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));
// Accessing the first worksheet in the Excel file
const worksheet = workbook.worksheets.get(0);
// Access first and fourth shapes
const shape1 = worksheet.shapes.get(0);
const shape4 = worksheet.shapes.get(3);
// Print the Z-Order position of shape1
resultDiv.innerHTML = `<p>Z-Order Shape 1: ${shape1.zOrderPosition}</p>`;
// Send this shape to front
shape1.toFrontOrBack(2);
// Print the Z-Order position of shape4
resultDiv.innerHTML += `<p>Z-Order Shape 4: ${shape4.zOrderPosition}</p>`;
// Send this shape to back
shape4.toFrontOrBack(-2);
// Saving the modified Excel file and preparing download link
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'outputToFrontOrBack.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
resultDiv.innerHTML += '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>