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iText, a free Java-PDF library
/*
* $Id: 0b8390b88fbd1b1b5378cccafc40c43fc206e3b6 $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2015 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.error_messages.MessageLocalization;
import java.io.IOException;
/**
* Creates a radio or a check field.
*
* Example usage:
*
*
* Document document = new Document(PageSize.A4, 50, 50, 50, 50);
* PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));
* document.open();
* PdfContentByte cb = writer.getDirectContent();
* RadioCheckField bt = new RadioCheckField(writer, new Rectangle(100, 100, 200, 200), "radio", "v1");
* bt.setCheckType(RadioCheckField.TYPE_CIRCLE);
* bt.setBackgroundColor(Color.cyan);
* bt.setBorderStyle(PdfBorderDictionary.STYLE_SOLID);
* bt.setBorderColor(Color.red);
* bt.setTextColor(Color.yellow);
* bt.setBorderWidth(BaseField.BORDER_WIDTH_THICK);
* bt.setChecked(false);
* PdfFormField f1 = bt.getRadioField();
* bt.setOnValue("v2");
* bt.setChecked(true);
* bt.setBox(new Rectangle(100, 300, 200, 400));
* PdfFormField f2 = bt.getRadioField();
* bt.setChecked(false);
* PdfFormField top = bt.getRadioGroup(true, false);
* bt.setOnValue("v3");
* bt.setBox(new Rectangle(100, 500, 200, 600));
* PdfFormField f3 = bt.getRadioField();
* top.addKid(f1);
* top.addKid(f2);
* top.addKid(f3);
* writer.addAnnotation(top);
* bt = new RadioCheckField(writer, new Rectangle(300, 300, 400, 400), "check1", "Yes");
* bt.setCheckType(RadioCheckField.TYPE_CHECK);
* bt.setBorderWidth(BaseField.BORDER_WIDTH_THIN);
* bt.setBorderColor(Color.black);
* bt.setBackgroundColor(Color.white);
* PdfFormField ck = bt.getCheckField();
* writer.addAnnotation(ck);
* document.close();
*
* @author Paulo Soares
*/
public class RadioCheckField extends BaseField {
/** A field with the symbol check */
public static final int TYPE_CHECK = 1;
/** A field with the symbol circle */
public static final int TYPE_CIRCLE = 2;
/** A field with the symbol cross */
public static final int TYPE_CROSS = 3;
/** A field with the symbol diamond */
public static final int TYPE_DIAMOND = 4;
/** A field with the symbol square */
public static final int TYPE_SQUARE = 5;
/** A field with the symbol star */
public static final int TYPE_STAR = 6;
protected static String typeChars[] = {"4", "l", "8", "u", "n", "H"};
/**
* Holds value of property checkType.
*/
protected int checkType;
/**
* Holds value of property onValue.
*/
private String onValue;
/**
* Holds value of property checked.
*/
private boolean checked;
/**
* Creates a new instance of RadioCheckField
* @param writer the document PdfWriter
* @param box the field location and dimensions
* @param fieldName the field name. It must not be null
* @param onValue the value when the field is checked
*/
public RadioCheckField(PdfWriter writer, Rectangle box, String fieldName, String onValue) {
super(writer, box, fieldName);
setOnValue(onValue);
setCheckType(TYPE_CIRCLE);
}
/**
* Getter for property checkType.
* @return Value of property checkType.
*/
public int getCheckType() {
return this.checkType;
}
/**
* Sets the checked symbol. It can be
* TYPE_CHECK,
* TYPE_CIRCLE,
* TYPE_CROSS,
* TYPE_DIAMOND,
* TYPE_SQUARE and
* TYPE_STAR.
* @param checkType the checked symbol
*/
public void setCheckType(int checkType) {
if (checkType < TYPE_CHECK || checkType > TYPE_STAR)
checkType = TYPE_CIRCLE;
this.checkType = checkType;
setText(typeChars[checkType - 1]);
try {
setFont(BaseFont.createFont(BaseFont.ZAPFDINGBATS, BaseFont.WINANSI, false));
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Getter for property onValue.
* @return Value of property onValue.
*/
public String getOnValue() {
return this.onValue;
}
/**
* Sets the value when the field is checked.
* @param onValue the value when the field is checked
*/
public void setOnValue(String onValue) {
this.onValue = onValue;
}
/**
* Getter for property checked.
* @return Value of property checked.
*/
public boolean isChecked() {
return this.checked;
}
/**
* Sets the state of the field to checked or unchecked.
* @param checked the state of the field, true for checked
* and false for unchecked
*/
public void setChecked(boolean checked) {
this.checked = checked;
}
/**
* Gets the field appearance.
* @param isRadio true for a radio field and false
* for a check field
* @param on true for the checked state, false
* otherwise
* @throws IOException on error
* @throws DocumentException on error
* @return the appearance
*/
public PdfAppearance getAppearance(boolean isRadio, boolean on) throws IOException, DocumentException {
if (isRadio && checkType == TYPE_CIRCLE)
return getAppearanceRadioCircle(on);
PdfAppearance app = getBorderAppearance();
if (!on)
return app;
BaseFont ufont = getRealFont();
boolean borderExtra = borderStyle == PdfBorderDictionary.STYLE_BEVELED || borderStyle == PdfBorderDictionary.STYLE_INSET;
float h = box.getHeight() - borderWidth * 2;
float bw2 = borderWidth;
if (borderExtra) {
h -= borderWidth * 2;
bw2 *= 2;
}
float offsetX = (borderExtra ? 2 * borderWidth : borderWidth);
offsetX = Math.max(offsetX, 1);
float offX = Math.min(bw2, offsetX);
float wt = box.getWidth() - 2 * offX;
float ht = box.getHeight() - 2 * offX;
float fsize = fontSize;
if (fsize == 0) {
float bw = ufont.getWidthPoint(text, 1);
if (bw == 0)
fsize = 12;
else
fsize = wt / bw;
float nfsize = h / (ufont.getFontDescriptor(BaseFont.ASCENT, 1));
fsize = Math.min(fsize, nfsize);
}
app.saveState();
app.rectangle(offX, offX, wt, ht);
app.clip();
app.newPath();
if (textColor == null)
app.resetGrayFill();
else
app.setColorFill(textColor);
app.beginText();
app.setFontAndSize(ufont, fsize);
app.setTextMatrix((box.getWidth() - ufont.getWidthPoint(text, fsize)) / 2,
(box.getHeight() - ufont.getAscentPoint(text, fsize)) / 2);
app.showText(text);
app.endText();
app.restoreState();
return app;
}
/**
* Gets the special field appearance for the radio circle.
* @param on true for the checked state, false
* otherwise
* @return the appearance
*/
public PdfAppearance getAppearanceRadioCircle(boolean on) {
PdfAppearance app = PdfAppearance.createAppearance(writer, box.getWidth(), box.getHeight());
switch (rotation) {
case 90:
app.setMatrix(0, 1, -1, 0, box.getHeight(), 0);
break;
case 180:
app.setMatrix(-1, 0, 0, -1, box.getWidth(), box.getHeight());
break;
case 270:
app.setMatrix(0, -1, 1, 0, 0, box.getWidth());
break;
}
Rectangle box = new Rectangle(app.getBoundingBox());
float cx = box.getWidth() / 2;
float cy = box.getHeight() / 2;
float r = (Math.min(box.getWidth(), box.getHeight()) - borderWidth) / 2;
if (r <= 0)
return app;
if (backgroundColor != null) {
app.setColorFill(backgroundColor);
app.circle(cx, cy, r + borderWidth / 2);
app.fill();
}
if (borderWidth > 0 && borderColor != null) {
app.setLineWidth(borderWidth);
app.setColorStroke(borderColor);
app.circle(cx, cy, r);
app.stroke();
}
if (on) {
if (textColor == null)
app.resetGrayFill();
else
app.setColorFill(textColor);
app.circle(cx, cy, r / 2);
app.fill();
}
return app;
}
/**
* Gets a radio group. It's composed of the field specific keys, without the widget
* ones. This field is to be used as a field aggregator with {@link PdfFormField#addKid(PdfFormField) addKid()}.
* @param noToggleToOff if true, exactly one radio button must be selected at all
* times; clicking the currently selected button has no effect.
* If false, clicking
* the selected button deselects it, leaving no button selected.
* @param radiosInUnison if true, a group of radio buttons within a radio button field that
* use the same value for the on state will turn on and off in unison; that is if
* one is checked, they are all checked. If false, the buttons are mutually exclusive
* (the same behavior as HTML radio buttons)
* @return the radio group
*/
public PdfFormField getRadioGroup(boolean noToggleToOff, boolean radiosInUnison) {
PdfFormField field = PdfFormField.createRadioButton(writer, noToggleToOff);
if (radiosInUnison)
field.setFieldFlags(PdfFormField.FF_RADIOSINUNISON);
field.setFieldName(fieldName);
if ((options & READ_ONLY) != 0)
field.setFieldFlags(PdfFormField.FF_READ_ONLY);
if ((options & REQUIRED) != 0)
field.setFieldFlags(PdfFormField.FF_REQUIRED);
field.setValueAsName(checked ? onValue : "Off");
return field;
}
/**
* Gets the radio field. It's only composed of the widget keys and must be used
* with {@link #getRadioGroup(boolean,boolean)}.
* @return the radio field
* @throws IOException on error
* @throws DocumentException on error
*/
public PdfFormField getRadioField() throws IOException, DocumentException {
return getField(true);
}
/**
* Gets the check field.
* @return the check field
* @throws IOException on error
* @throws DocumentException on error
*/
public PdfFormField getCheckField() throws IOException, DocumentException {
return getField(false);
}
/**
* Gets a radio or check field.
* @param isRadio true to get a radio field, false to get
* a check field
* @throws IOException on error
* @throws DocumentException on error
* @return the field
*/
protected PdfFormField getField(boolean isRadio) throws IOException, DocumentException {
PdfFormField field = null;
if (isRadio)
field = PdfFormField.createEmpty(writer);
else
field = PdfFormField.createCheckBox(writer);
field.setWidget(box, PdfAnnotation.HIGHLIGHT_INVERT);
if (!isRadio) {
if (!"Yes".equals(onValue)) {
throw new DocumentException(MessageLocalization.getComposedMessage("1.is.not.a.valid.name.for.checkbox.appearance", onValue));
}
field.setFieldName(fieldName);
if ((options & READ_ONLY) != 0)
field.setFieldFlags(PdfFormField.FF_READ_ONLY);
if ((options & REQUIRED) != 0)
field.setFieldFlags(PdfFormField.FF_REQUIRED);
field.setValueAsName(checked ? onValue : "Off");
setCheckType(checkType);
}
if (text != null)
field.setMKNormalCaption(text);
if (rotation != 0)
field.setMKRotation(rotation);
field.setBorderStyle(new PdfBorderDictionary(borderWidth, borderStyle, new PdfDashPattern(3)));
PdfAppearance tpon = getAppearance(isRadio, true);
PdfAppearance tpoff = getAppearance(isRadio, false);
field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, onValue, tpon);
field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", tpoff);
field.setAppearanceState(checked ? onValue : "Off");
PdfAppearance da = (PdfAppearance)tpon.getDuplicate();
BaseFont realFont = getRealFont();
if (realFont != null)
da.setFontAndSize(getRealFont(), fontSize);
if (textColor == null)
da.setGrayFill(0);
else
da.setColorFill(textColor);
field.setDefaultAppearanceString(da);
if (borderColor != null)
field.setMKBorderColor(borderColor);
if (backgroundColor != null)
field.setMKBackgroundColor(backgroundColor);
switch (visibility) {
case HIDDEN:
field.setFlags(PdfAnnotation.FLAGS_PRINT | PdfAnnotation.FLAGS_HIDDEN);
break;
case VISIBLE_BUT_DOES_NOT_PRINT:
break;
case HIDDEN_BUT_PRINTABLE:
field.setFlags(PdfAnnotation.FLAGS_PRINT | PdfAnnotation.FLAGS_NOVIEW);
break;
default:
field.setFlags(PdfAnnotation.FLAGS_PRINT);
break;
}
return field;
}
}