Itext组合框,所选选项的宽度问题

时间:2015-01-30 13:22:44

标签: java combobox itext

我在使用Itext pdf时遇到问题。问题是,在选择了一个选项并且指针聚焦在pdf的另一个元素上之后,TextField中的文本会以某种方式被切断或者某些字母浮动。什么是解决方案? 显示正在发生的事情的图像 enter image description here 代码块是

    @Override
public void writePdfElement(RankingQuestionDTO input, Document document, PdfWriter writer, PdfPTable baseTable)  {

    try{
        PdfPTable table = new PdfPTable(2);
        PdfPCell cell;
        document.add(new Paragraph(input.getText(), stylesService.getHeaderFont()));
        //Add rows with selectors
        PdfFormField selectGroup = PdfFormField.createTextField(writer, true, false, 10);
        selectGroup.setFieldName(String.format("%s", input.getUuid()));
        ArrayList<RankingAnswerDTO> possibleAnswers = input.getPossibleAnswers();
        for(int i = 0; i <input.getPossibleAnswers().size(); i++) {
            cell = new PdfPCell();
            cell.setPhrase(getPolishTablePhrase(input.getText()));
            cell.setPadding(stylesService.getPaddingCell());
            table.addCell(cell);
            cell = new PdfPCell();
            cell.setPadding(stylesService.getPaddingCell());
            cell.setCellEvent(new SelectCellEvent(String.format("%s",i), selectGroup, writer, stylesService,
                    possibleAnswers));
            cell.setMinimumHeight(stylesService.getMinimumHeight());
            table.addCell(cell);
        }
        baseTable.addCell(table);
        document.add(baseTable);
        writer.addAnnotation(selectGroup);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

    @Override
    public void cellLayout(PdfPCell cell, Rectangle position,
                       PdfContentByte[] canvases) {

    Rectangle rect = stylesService.getSelectFiledRectangle(position, sizeOfRect);
    // define the select box
    TextField tf = new TextField(writer, rect, name);

    try {
        tf.setFont(BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.CP1250, true));
    } catch (DocumentException | IOException e) {
        e.printStackTrace();
    }
    tf.setBackgroundColor(stylesService.getBackgroundColor());
    tf.setBorderColor(stylesService.getBorderColor());
    tf.setBorderStyle(PdfBorderDictionary.STYLE_BEVELED);
    tf.setVisibility(TextField.VISIBLE_BUT_DOES_NOT_PRINT);
    tf.setBorderColor(BaseColor.GRAY);
    tf.setBorderWidth(stylesService.getFloatBorderWidth());
    tf.setFontSize(stylesService.getFieldFloatFont());
    tf.setChoices(select);
    tf.setChoiceExports(ranks);
    tf.setAlignment(Element.ALIGN_CENTER);
    tf.setOptions(TextField.MULTILINE);
    tf.setRotation(0);
    // add the select box as a field
    try {
        selectGroup.addKid(tf.getComboField());
    } catch (Exception e) {
        throw new ExceptionConverter(e);
    }
}

问题在于字体设置。 以下方法工作正常

private void initializeBaseFont() {
    try {
        baseFont = BaseFont.createFont("c:/windows/fonts/arial.ttf", BaseFont.CP1250, BaseFont.EMBEDDED);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

而不是

tf.setFont(BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.CP1250, true));

1 个答案:

答案 0 :(得分:1)

请查看ComboBoxItems示例:

这是单元格事件的实现:

class SelectCellEvent implements PdfPCellEvent {
    protected PdfFormField selectGroup;
    protected String name;
    protected String[] exports;
    protected String[] options;
    protected BaseFont font;

    public SelectCellEvent(PdfFormField selectGroup, String name, String[] exports, String[] options) throws DocumentException, IOException {
        this.selectGroup = selectGroup;
        this.name = name;
        this.exports = exports;
        this.options = options;
        font = BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.CP1250, BaseFont.NOT_EMBEDDED);
        font.setSubset(false);
    }

    public void cellLayout(PdfPCell cell, Rectangle position, PdfContentByte[] canvases) {
        PdfWriter writer = canvases[0].getPdfWriter();
        TextField tf = new TextField(writer, position, name);
        tf.setFont(font);
        tf.setBorderStyle(PdfBorderDictionary.STYLE_BEVELED);
        tf.setVisibility(TextField.VISIBLE_BUT_DOES_NOT_PRINT);
        tf.setBorderColor(BaseColor.GRAY);
        tf.setChoiceExports(exports);
        tf.setChoices(options);
        tf.setAlignment(Element.ALIGN_CENTER);
        try {
            selectGroup.addKid(tf.getComboField());
        } catch (Exception e) {
            throw new ExceptionConverter(e);
        }
    }
}

这是PDF创建过程:

public void createPdf(String dest) throws IOException, DocumentException {
    Rectangle pagesize = PageSize.LETTER;
    Document document = new Document(pagesize);
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
    document.open();
    PdfPTable table = new PdfPTable(2);
    PdfPCell cell;
    //Add rows with selectors
    PdfFormField selectGroup = PdfFormField.createEmpty(writer);
    selectGroup.setFieldName("myCombos");
    String[] options = {"Choose first option", "Choose second option", "Choose third option"};
    String[] exports = {"option1", "option2", "option3"};
    table.addCell("Combobox:");
    cell = new PdfPCell();
    cell.setCellEvent(new SelectCellEvent(selectGroup, "combo1", exports, options));
    cell.setMinimumHeight(20);
    table.addCell(cell);
    document.add(table);
    writer.addAnnotation(selectGroup);
    document.close();
}

我的代码中有许多我不理解的东西。

什么是selectGroup?

似乎你有几个组合框(在我的例子中我只有一个)是名为selectGroup的文本字段的孩子。为什么selectGroup是文本字段?我没有看到你在任何地方定义它的尺寸?

我假设你想创建一个父字段,例如myCombos,然后是一些孩子combo1combo2,......这样您就拥有myCombos.combo1myCombos.combo2等......

如果是这种情况,请使用createEmpty()方法代替createTextField()方法。

为什么要嵌入字体?

这没有意义:

BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.CP1250, true)

您正在使用标准类型1字体BaseFont.TIMES_ROMAN。标准类型1字体永远不会被iText嵌入,因为它们应该出现在每个读者中。因此,true方法的createFont()参数将被忽略。

导致问题的原因是什么?

定义字体时,iText只会使用很小一部分字体数据。更具体地说:只有创建所用字符外观所需的信息&#34;选择第一个选项&#34;。 &#34; c&#34;和&#34; d&#34;在这种情况下失踪了。因此,当Adobe Reader必须将单词呈现为第二个时,它将会出现那些缺少字符的问题。

您可以通过添加:

来避免这种情况
font.setSubset(false);

或者使用完全不同的字体。