使用 DrawObjectEventHandler 类渲染到 PDF 时获取 DrawObject 和 Bound

可能的使用场景

Aspose.Cells 提供抽象类绘图对象事件处理器它有一个[画（）](https://reference.aspose.com/cells/java/com.aspose.cells/drawobjecteventhandler#draw(com.aspose.cells.DrawObject,%20float,%20float,%20float,%20float)） 方法。用户可以实施绘图对象事件处理器并利用[画（）](https://reference.aspose.com/cells/java/com.aspose.cells/drawobjecteventhandler#draw(com.aspose.cells.DrawObject,%20float,%20float,%20float,%20float)方法获取绘图对象和边界在将 Excel 渲染为 PDF 或图像时。下面简单介绍一下参数[画（）](https://reference.aspose.com/cells/java/com.aspose.cells/drawobjecteventhandler#draw(com.aspose.cells.DrawObject,%20float,%20float,%20float,%20float)） 方法。

• 绘制对象：绘图对象将在渲染时初始化并返回

• x：左边绘图对象

• y：顶部绘图对象

• 宽度：宽度绘图对象

• 高度：高度绘图对象

如果您将 Excel 文件渲染到 PDF，那么您可以利用绘图对象事件处理器类PdfSaveOptions.DrawObjectEventHandler.同样，如果您将 Excel 文件渲染为图像，您可以使用绘图对象事件处理器类ImageOrPrintOptions.DrawObjectEventHandler.

使用 DrawObjectEventHandler 类在渲染到 Pdf 时获取 DrawObject 和 Bound

请参阅以下示例代码。它加载了示例 Excel 文件并将其另存为输出 PDF.在渲染到 PDF 时，它利用PdfSaveOptions.DrawObjectEventHandler财产和捕获绘图对象和边界现有的单元格和对象，例如图像等。如果 drawObject 类型是 Cell，它会打印其 Bound 和 StringValue。如果 drawObject 类型是 Image，它会打印它的 Bound 和 Shape Name。请查看下面给出的示例代码的控制台输出以获得更多帮助。

示例代码

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java

import com.aspose.cells.*;
import AsposeCellsExamples.Utils;

public class GetDrawObjectAndBoundUsingDrawObjectEventHandler {
	
	static String srcDir = Utils.Get_SourceDirectory();
	static String outDir = Utils.Get_OutputDirectory();
	
	//Implement the concrete class of DrawObjectEventHandler
	class clsDrawObjectEventHandler extends DrawObjectEventHandler
	{
		public void draw(DrawObject drawObject, float x, float y, float width, float height)
		{
			System.out.println();

			//Print the coordinates and the value of Cell object
			if (drawObject.getType() == DrawObjectEnum.CELL)
			{
				System.out.println("[X]: " + x + " [Y]: " + y + " [Width]: " + width + " [Height]: " + height + " [Cell Value]: " + drawObject.getCell().getStringValue());
			}

			//Print the coordinates and the shape name of Image object
			if (drawObject.getType() == DrawObjectEnum.IMAGE)
			{
				System.out.println("[X]: " + x + " [Y]: " + y + " [Width]: " + width + " [Height]: " + height + " [Shape Name]: " + drawObject.getShape().getName());
			}

			System.out.println("----------------------");
		}
	}

	void Run() throws Exception
	{
		//Load sample Excel file
		Workbook wb = new Workbook(srcDir + "sampleGetDrawObjectAndBoundUsingDrawObjectEventHandler.xlsx");
	 
		//Specify Pdf save options
		PdfSaveOptions opts = new PdfSaveOptions();
	 
		//Assign the instance of DrawObjectEventHandler class
		opts.setDrawObjectEventHandler(new clsDrawObjectEventHandler());
	 
		//Save to Pdf format with Pdf save options
		wb.save(outDir + "outputGetDrawObjectAndBoundUsingDrawObjectEventHandler.pdf", opts);
	}
	
	public static void main(String[] args) throws Exception {

		System.out.println("Aspose.Cells for Java Version: " + CellsHelper.getVersion());
		
		new GetDrawObjectAndBoundUsingDrawObjectEventHandler().Run();

		// Print the message
		System.out.println("GetDrawObjectAndBoundUsingDrawObjectEventHandler executed successfully.");
	}
}

控制台输出

[X]: 153.60349 [Y]: 82.94118 [Width]: 103.203476 [Height]: 14.470589 [Cell Value]: This is sample text.

\----------------------

[X]: 267.28854 [Y]: 153.12354 [Width]: 161.25542 [Height]: 128.78824 [Shape Name]: Sun

\----------------------