QTextDocument，QPdfWriter-如何缩放输出 [英] QTextDocument, QPdfWriter - how to scale output

问题描述

我创建了一个带有表的QTextDocument.现在，我尝试使用QPdfWriter(Qt 5.2.1)将其呈现为PDF格式.这是我的方法:

I have createated a QTextDocument with a table in it. Now I'm trying to render it into PDF format using QPdfWriter (Qt 5.2.1). This is how I do it:

QPdfWriter pdfWriter(output);
QPainter painter(&pdfWriter);
doc->drawContents(&painter);

它可以工作，但是问题在于PDF中的表格非常小​​.我该怎么做才能扩大规模?我的意思是按比例放大整个文档，而不仅仅是此表，因为我计划向文档中添加更多内容.

It works, but the problem is that the table in PDF is really, really tiny. What can I do to scale it up? I mean to scale up the whole document, not just this table, because I plan to add more contents to the document.

推荐答案

答案是使用QPainter::scale()，所以在我的情况下:

The answer is to use QPainter::scale(), so in my case:

QPdfWriter pdfWriter(output);
QPainter painter(&pdfWriter);
painter.scale(20.0, 20.0);
doc->drawContents(&painter);

这会使画家将所有东西都涂成20倍大.

This causes painter to paint everything 20 times bigger.

我仍然不知道为什么QPdfWriter将所有东西都绘制得如此之细，但是问题可以如上所述解决.

I still don't know why QPdfWriter paints everything so tiny, but the problem can be solved as above.

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