如何在iText中定位PDFGraphis2D对象？ [英] How to position a PDFGraphis2D object in iText?

问题描述

我正在创建一个PDF，我想在那里添加一个JPanel。

I'm creating a PDF and somewhere in there I want to add a JPanel.

使用 PdfContentByte 和 PdfGraphics2D 我可以添加它到文件但是：

Using PdfContentByte and PdfGraphics2D I am able to add it to the document but:

• 如何定位它，使其位于左边距而不是左页边缘？


• 如何防止它出现在其他元素上？


• 换句话说：我怎样才能把它放在段落中？

代码片段：

// multiple Paragraphs
// ...
JPanel myPanel = ...

PdfContentByte canvas = writer.getDirectContent();
int origWidth = myPanel.getWidth();
int origHeight = myPanel.getHeight();
float width = document.getPageSize().getWidth() - document.leftMargin() - document.rightMargin();
double scale = width / origWidth;
Graphics2D g2 = new PdfGraphics2D(canvas, origWidth, origHeight);
g2.scale(scale, scale);
myPanel.paint(g2);
g2.dispose();

// even more Paragraphs
//...

推荐答案

我通过使用 PdfTemplate 并从中创建图像那个。

I got it working by using a PdfTemplate and creating an Image from that.

PdfContentByte canvas = writer.getDirectContent();
int origWidth = myPanel.getWidth();
int origHeight = myPanel.getHeight();
PdfTemplate template = canvas.createTemplate(origWidth, origHeight);
Graphics2D g2 = new PdfGraphics2D(template, origWidth, origHeight);
myPanel.paint(g2);
g2.dispose();
Image image = Image.getInstance(template);
float width = document.getPageSize().getWidth() - document.leftMargin() - document.rightMargin();
image.scaleToFit(width, 1000);
document.add(image)

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