如何将PDTextbox的文本设置为颜色？ [英] How to set the text of a PDTextbox to a color?

问题描述

我希望PDTextbox有红色文字。我能写出红色文字，我可以设置文本框的值，但我不知道如何将文本框内容设置为红色。

I would like a PDTextbox to have Red text. I'm able to write out Red text, and I can set the value of a textbox, but I'm not sure how to set the textbox content to the color Red.

ie。

if (field instanceof PDTextbox) {
    field.setValue(field.getPartialName());
    //SOME WAY TO SET COLOR HERE?

以下是我正在使用的测试代码：

Here is the test code I'm using:

package com.circumail;

import java.awt.Color;
import java.io.File;
import java.io.IOException;
import java.util.List;

import org.apache.fontbox.util.BoundingBox;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDField;
import org.apache.pdfbox.pdmodel.interactive.form.PDTextbox;

public class Test {

  public static void main(String[] args) throws Exception {
    File file = new File("c://temp//Work_Comp_App-Acord_130 fillv2.pdf");
    System.out.println("exists= " + file.exists());

    // Load the pdfTemplate
    PDDocument pdfDoc = PDDocument.load(file);
    PDDocumentCatalog docCatalog = pdfDoc.getDocumentCatalog();
    PDAcroForm acroForm = docCatalog.getAcroForm();

    // Get field names
    List<PDField> fieldList = acroForm.getFields();
    List<PDPage> pages = pdfDoc.getDocumentCatalog().getAllPages();
    for (PDPage page : pages) {
      // PDPageContentStream contentStream = new PDPageContentStream(pdfDoc, firstPage, true, false);
      PDPageContentStream contentStream = new PDPageContentStream(pdfDoc, page, true, true, true);
      processFields(acroForm, fieldList, contentStream);
      contentStream.close();
    }

    // Save edited file
    pdfDoc.save("c://temp//Work_Comp_App-Acord_130 fillv2 out.pdf");
    pdfDoc.close();
  }

  private static void processFields(PDAcroForm acroForm, List<PDField> fieldList, PDPageContentStream contentStream) throws IOException {
    for (PDField field : fieldList) {
      if (field instanceof PDTextbox) {
        field.setValue(field.getPartialName());
      }else{
        PDRectangle rect = getOffsetRectangle(field);
        //set text color to RED - not sure if I neet to set this back, can't get original color by calling contentStream.getNonStrokingColor()
        contentStream.setNonStrokingColor(Color.RED);
        contentStream.beginText();
        contentStream.setFont(PDType1Font.HELVETICA_BOLD, 8);
        contentStream.moveTextPositionByAmount(rect.getLowerLeftX(),rect.getLowerLeftY());
        contentStream.drawString( field.getPartialName());
        contentStream.endText();
      }
    }
  }

  private static PDRectangle getOffsetRectangle(PDField field) {
    COSDictionary fieldDict = field.getDictionary();
    COSArray fieldAreaArray = (COSArray) fieldDict.getDictionaryObject(COSName.RECT);
    PDRectangle rect = new PDRectangle(fieldAreaArray);

    //move the text up and to the right a bit
    int extra = 10;
    float x = rect.getLowerLeftX()+ extra;
    float y = rect.getLowerLeftY() + extra;
    float width = rect.getUpperRightX() + extra;
    float height = rect.getUpperRightY()+ extra;
    rect = new PDRectangle(new BoundingBox(x, y, width, height));
    return rect;
  }

  private static void printRect(final PDPageContentStream contentStream, final PDRectangle rect) throws IOException {
    contentStream.setStrokingColor(Color.YELLOW);
    contentStream.drawLine(rect.getLowerLeftX(), rect.getLowerLeftY(), rect.getLowerLeftX(), rect.getUpperRightY()); // left
    contentStream.drawLine(rect.getLowerLeftX(), rect.getUpperRightY(), rect.getUpperRightX(), rect.getUpperRightY()); // top
    contentStream.drawLine(rect.getUpperRightX(), rect.getLowerLeftY(), rect.getUpperRightX(), rect.getUpperRightY()); // right
    contentStream.drawLine(rect.getLowerLeftX(), rect.getLowerLeftY(), rect.getUpperRightX(), rect.getLowerLeftY()); // bottom
    contentStream.setStrokingColor(Color.BLACK);
  }

}

推荐答案

通常，文本字段具有默认的外观条目，PDFBox构造外观。因此，您只需要更改此默认外观以包含选择红色的语句。

Normally a text field has a default appearance entry from which PDFBox constructs the appearance. Thus, you merely need to change this default appearance to also include a statement selecting red color.

例如

PDDocument pdfDoc = PDDocument.load(SOURCE);
PDDocumentCatalog docCatalog = pdfDoc.getDocumentCatalog();
PDAcroForm acroForm = docCatalog.getAcroForm();

for (Object field : acroForm.getFields())
{
    if (field instanceof PDVariableText)
    {
        COSDictionary dict = ((PDField)field).getDictionary();
        COSString defaultAppearance = (COSString) dict.getDictionaryObject(COSName.DA);
        if (defaultAppearance != null)
            dict.setString(COSName.DA, defaultAppearance.getString() + " 1 0 0 rg ");

        field = field instanceof PDTextbox ? new PDTextbox(acroForm, dict) : new PDChoiceField(acroForm, dict);
        ((PDField)field).setValue(VALUE);
    }
}
pdfDoc.save(TARGET);
pdfDoc.close();

此代码首先增强默认外观，然后设置字段值。字段变量必须在两者之间更新，因为 PDVariableText 在初始化期间将默认外观存储在隐藏成员中。

This code first enhances the default appearance and then sets the field value. The field variable has to be renewed in between because PDVariableText stores the default appearance in a hidden member during initialization.

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