Java BaseFont.getWidthPoint方法代碼示例

import com.itextpdf.text.pdf.BaseFont; //導入方法依賴的package包/類
/**
 * <a href="http://stackoverflow.com/questions/34734669/define-background-color-and-transparency-of-link-annotation-in-pdf">
 * Define background color and transparency of link annotation in PDF
 * </a>
 * <p>
 * This test creates a link annotation with custom appearance. Adobe Reader chooses
 * to ignore it but other viewers use it. Interestingly Adobe Acrobat export-as-image
 * does use the custom appearance...
 * </p>
 */
@Test
public void testCreateLinkWithAppearance() throws IOException, DocumentException
{
    Document doc = new Document();
    PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream(new File(RESULT_FOLDER, "custom-link.appearance.pdf")));
    writer.setCompressionLevel(0);
    doc.open();

    BaseFont baseFont = BaseFont.createFont();
    int fontSize = 15;
    doc.add(new Paragraph("Hello", new Font(baseFont, fontSize)));
    
    PdfContentByte content = writer.getDirectContent();
    
    String text = "Test";
    content.setFontAndSize(baseFont, fontSize);
    content.beginText();
    content.moveText(100, 500);
    content.showText(text);
    content.endText();
    
    Rectangle linkLocation = new Rectangle(95, 495 + baseFont.getDescentPoint(text, fontSize),
            105 + baseFont.getWidthPoint(text, fontSize), 505 + baseFont.getAscentPoint(text, fontSize));

    PdfAnnotation linkGreen = PdfAnnotation.createLink(writer, linkLocation, PdfName.HIGHLIGHT, "green" );
    PdfTemplate appearance = PdfTemplate.createTemplate(writer, linkLocation.getWidth(), linkLocation.getHeight());
    PdfGState state = new PdfGState();
    //state.FillOpacity = .3f;
    // IMPROVEMENT: Use blend mode Darken instead of transparency; you may also want to try Multiply.
    state.setBlendMode(new PdfName("Darken"));
    appearance.setGState(state);

    appearance.setColorFill(BaseColor.GREEN);
    appearance.rectangle(0, 0, linkLocation.getWidth(), linkLocation.getHeight());
    appearance.fill();
    linkGreen.setAppearance(PdfName.N, appearance);
    writer.addAnnotation(linkGreen);

    doc.open();
    doc.close();
}
 

import com.itextpdf.text.pdf.BaseFont; //導入方法依賴的package包/類
public void cellLayout(final PdfPCell cell,
                       final Rectangle position,
                       final PdfContentByte[] canvases) {
  try {
    final BaseFont bf = font.getCalculatedBaseFont(false);
    float availableWidth = position.getWidth();
    float contentWidth = bf.getWidthPoint(content, font.getSize());

    final String newContent;
    if (contentWidth > availableWidth) {
      if (LOGGER.isTraceEnabled()) {
        LOGGER.trace("Need to truncate '"
            + content
            + "'");
      }

      final int contentLength = content.length();
      int leftChar = 0;
      availableWidth -= bf.getWidthPoint("...", font.getSize());
      while (leftChar < contentLength) {
        availableWidth -= bf.getWidthPoint(content.charAt(leftChar), font.getSize());
        if (availableWidth > 0) {
          leftChar++;
        } else {
          break;
        }
      }
      newContent = content.substring(0, leftChar)
          + "...";
    } else {
      if (LOGGER.isTraceEnabled()) {
        LOGGER.trace("Not truncating '"
            + content
            + "'");
      }

      newContent = content;
    }
    final PdfContentByte canvas = canvases[PdfPTable.TEXTCANVAS];
    final ColumnText ct = new ColumnText(canvas);
    ct.setSimpleColumn(position);
    ct.addElement(new Paragraph(newContent, font));
    ct.go();
  } catch (final DocumentException e) {
    throw new ExceptionConverter(e);
  }
}