如何在矩形内拟合String？ [英] How to fit a String inside a rectangle?

问题描述

我正在尝试将一些字符串，图像和表添加到我的pdf文件中（必须有几个页面），但是当我尝试使用 ColumnText 时（我使用）这是因为我想把字符串放在绝对位置），我遇到了一个问题。
如果列高度不足以添加字符串的内容，则内容不完整。如何避免内容丢失？

I'm trying to add some strings, images and tables into my pdf file (there have to be several pages) but when i try to use ColumnText (I use this because I want to place strings at absolute positions), I encounter a problem. When the column height is not sufficient to add the content of the strings, the content is incomplete. How can I avoid that content gets lost?

以下是相关代码：

try {
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    String imageUrl = "/Users/nofear/workspace/deneme23/pics/a4-ust.png";
    String imageUrlAlt = "pics/a4-alt.png";
    Image imageust = null;
    Image imageAlt = null;
    try {
        imageust = Image.getInstance(imageUrl);
        imageAlt = Image.getInstance(imageUrlAlt);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    System.out.println("HEIGHT"
        + (document.getPageSize().getHeight() - imageust.getHeight()));
    imageust.setAbsolutePosition(0f,
        document.getPageSize().getHeight() - imageust.getHeight()-10);
    imageAlt.setAbsolutePosition( 0f, 10f);
    document.add(imageust);
    document.add(imageAlt);
    // now draw a line below the headline
    cb.setLineWidth(1f); 
    cb.moveTo(0, 200);
    cb.lineTo(200, 200);
    cb.stroke();
    // first define a standard font for our text
    Font helvetica8BoldBlue = FontFactory.getFont(FontFactory.HELVETICA,16);
    // create a column object
    ColumnText ct = new ColumnText(cb);
    // define the text to print in the column
    Phrase myText = new Phrase("Very Very Long String!!!" , helvetica8BoldBlue);
    ct.setSimpleColumn(myText, 60, 750,
        /* width*/document.getPageSize().getWidth() - 40, 100,
        20, Element.ALIGN_LEFT);
    ct.go();
} catch (Exception e) {
} finally {
    document.close();
}

推荐答案

有三种选择：

1. 要么提供更大的矩形，以便内容适合内部，


2. 或者减少内容（例如较小的字体，较少的文字），...


3. 保持矩形的大小，保持字体大小等...但添加不适合的内容下一页。

您如何知道内容是否适合？

How do you know if the content doesn't fit?

您可以先在模拟模式中添加内容，然后测试所有内容是否已消耗：

You can add the content in simulation mode first, and test if all the content was 'consumed':

int status = ct.go(true);
boolean fits = !ColumnText.hasMoreText(status);

根据的值，你可以决定改变矩形或内容的大小。有一个示例说明如何执行此操作： http://itextpdf.com/examples/iia .php？id = 163

Based on the value of fits, you can decide to change the size of the rectangle or the content. There's an example that shows how to do this: http://itextpdf.com/examples/iia.php?id=163

如果你可以在不同的页面上分发内容，你不需要模拟模式，你只需要插入一个 document.newPage（）;

If you can distribute the content over different pages, you don't need simulation mode, you just need to insert a document.newPage();

ColumnText ct = new ColumnText(cb);
ct.setSimpleColumn(rect);
int status = ct.go();
while (ColumnText.hasMoreText(status)) {
    document.newPage();
    ct.setSimpleColumn(rect);
    status = ct.go();
}

在此示例中 rect 包含矩形的坐标。

In this example rect contains the coordinates of the rectangle.

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