steve poling wrote:
Hello,
If I go into Adobe Acrobat, I can menupick Advanced | JavaScript |
Document JavaScrpts... and then I can define named JavaScript functions,
that is, I can enter a function name, and associate with it some
JavaScript. Then if I look at the PDF at a low level, I see Root | Names
| JavaScript | Names and then an array of even-numbered length. Odd
numbered elements hold my function names, and even elements hold the
associated JavaScript code.
If you use the version of iText that is in SVN, you can
execute the adapted Calculator example (see attachment).
As you can see: I used custom names for every piece of JS.
br,
Bruno
package test;
import java.awt.Color;
import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfAction;
import com.lowagie.text.pdf.PdfAnnotation;
import com.lowagie.text.pdf.PdfAppearance;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfFormField;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfWriter;
/**
* This example was written by Bruno Lowagie. It is part of the book 'iText in
* Action' by Manning Publications.
* ISBN: 1932394796
* http://itext.ugent.be/itext-in-action/
* http://www.manning.com/lowagie/
*/
public class Test {
public static final BaseFont BF;
static {
try {
BF = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI,
BaseFont.NOT_EMBEDDED);
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Demonstrates how widget annotations can be used to create a calculator.
*
* @param args
* no arguments needed here
*/
public static void main(String[] args) {
Rectangle[] digits = new Rectangle[10];
digits[0] = createRectangle(3, 1, 1, 1);
digits[1] = createRectangle(1, 3, 1, 1);
digits[2] = createRectangle(3, 3, 1, 1);
digits[3] = createRectangle(5, 3, 1, 1);
digits[4] = createRectangle(1, 5, 1, 1);
digits[5] = createRectangle(3, 5, 1, 1);
digits[6] = createRectangle(5, 5, 1, 1);
digits[7] = createRectangle(1, 7, 1, 1);
digits[8] = createRectangle(3, 7, 1, 1);
digits[9] = createRectangle(5, 7, 1, 1);
Rectangle plus = createRectangle(7, 7, 1, 1);
Rectangle minus = createRectangle(9, 7, 1, 1);
Rectangle mult = createRectangle(7, 5, 1, 1);
Rectangle div = createRectangle(9, 5, 1, 1);
Rectangle equals = createRectangle(7, 1, 3, 1);
Rectangle clearEntry = createRectangle(7, 9, 1, 1);
Rectangle clear = createRectangle(9, 9, 1, 1);
Rectangle result = createRectangle(1, 9, 5, 1);
Rectangle move = createRectangle(8, 3, 1, 1);
// step 1: creation of a document-object
Document document = new Document(new Rectangle(360, 360));
try {
// step 2:
PdfWriter writer = PdfWriter.getInstance(document,
new FileOutputStream("calculator.pdf"));
// step 3:
document.open();
writer.addJavaScript("variables",
"var previous = 0; var current = 0; var operation = '';");
writer.addJavaScript("show",
"function show(c) { this.getField('result').value = c; }\n");
writer.addJavaScript("showMove",
"function showMove(s) { this.getField('move').value = s; }\n");
writer.addJavaScript("augment",
"function augment(digit) {\n"
+ "current = current * 10 + digit;\n"
+ "show(current);\n"
+ "}\n");
writer.addJavaScript("register",
"function register(op) { previous = this.getField('result').value; current = 0; operation = op; show(0); }\n");
writer.addJavaScript("calculate",
"function calculate_result() {\n"
+ "if (operation == '+') { previous = previous + current; }\n"
+ "else if (operation == '-') { previous = previous - current; }\n"
+ "else if (operation == '*') { previous = previous * current; }\n"
+ "else if (operation == '/') { previous = previous / current; }\n"
+ "show(previous);\n"
+ "}\n");
writer.addJavaScript("reset",
"function reset(all) { current = 0; if(all) previous = 0; show(0); }\n");
// step 4:
for (int i = 0; i < 10; i++) {
addPushButton(writer, digits[i], String.valueOf(i),
"this.augment(" + i + ")");
}
addPushButton(writer, plus, "+", "this.register('+')");
addPushButton(writer, minus, "-", "this.register('-')");
addPushButton(writer, mult, "x", "this.register('*')");
addPushButton(writer, div, ":", "this.register('/')");
addPushButton(writer, equals, "=", "this.calculate_result()");
addPushButton(writer, clearEntry, "CE", "this.reset(false)");
addPushButton(writer, clear, "C", "this.reset(true)");
addTextField(writer, result, "result");
addTextField(writer, move, "move");
} catch (Exception e) {
e.printStackTrace();
}
// step 5: we close the document
document.close();
}
private static void addTextField(PdfWriter writer, Rectangle rect,
String name) {
PdfFormField field = PdfFormField.createTextField(writer, false, false,
0);
field.setWidget(rect, PdfAnnotation.HIGHLIGHT_NONE);
field.setQuadding(PdfFormField.Q_RIGHT);
field.setFieldName(name);
field.setFieldFlags(PdfFormField.FF_READ_ONLY);
writer.addAnnotation(field);
}
private static void addPushButton(PdfWriter writer, Rectangle rect,
String btn, String script) {
float w = rect.getWidth();
float h = rect.getHeight();
PdfFormField pushbutton = PdfFormField.createPushButton(writer);
pushbutton.setFieldName("btn_" + btn);
pushbutton.setAdditionalActions(PdfName.U, PdfAction.javaScript(script,
writer));
pushbutton.setAdditionalActions(PdfName.E, PdfAction.javaScript(
"this.showMove('" + btn + "');", writer));
pushbutton.setAdditionalActions(PdfName.X, PdfAction.javaScript(
"this.showMove(' ');", writer));
PdfContentByte cb = writer.getDirectContent();
pushbutton.setAppearance(PdfAnnotation.APPEARANCE_NORMAL,
createAppearance(cb, btn, Color.GRAY, w, h));
pushbutton.setAppearance(PdfAnnotation.APPEARANCE_ROLLOVER,
createAppearance(cb, btn, Color.RED, w, h));
pushbutton.setAppearance(PdfAnnotation.APPEARANCE_DOWN,
createAppearance(cb, btn, Color.BLUE, w, h));
pushbutton.setWidget(rect, PdfAnnotation.HIGHLIGHT_PUSH);
writer.addAnnotation(pushbutton);
}
private static PdfAppearance createAppearance(PdfContentByte cb,
String btn, Color color, float w, float h) {
PdfAppearance app = cb.createAppearance(w, h);
app.setColorFill(color);
app.rectangle(2, 2, w - 4, h - 4);
app.fill();
app.beginText();
app.setColorFill(Color.BLACK);
app.setFontAndSize(BF, h / 2);
app.showTextAligned(Element.ALIGN_CENTER, btn, w / 2, h / 4, 0);
app.endText();
return app;
}
private static Rectangle createRectangle(int column, int row, int width,
int height) {
column = column * 36 - 18;
row = row * 36 - 18;
return new Rectangle(column, row, column + width * 36, row + height
* 36);
}
}-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems? Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/
_______________________________________________
iText-questions mailing list
iText-questions@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/itext-questions
Buy the iText book: http://itext.ugent.be/itext-in-action/
