// ===========================================================================
public void Write(Stream stream)
{
// step 1
using (Document document = new Document()) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
writer.PdfVersion = PdfWriter.VERSION_1_5;
// step 3
document.Open();
// step 4
PdfLayer a1 = new PdfLayer("answer 1", writer);
PdfLayer a2 = new PdfLayer("answer 2", writer);
PdfLayer a3 = new PdfLayer("answer 3", writer);
a1.On = false;
a2.On = false;
a3.On = false;
BaseFont bf = BaseFont.CreateFont();
PdfContentByte cb = writer.DirectContent;
cb.BeginText();
cb.SetFontAndSize(bf, 18);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"Q1: Who is the director of the movie 'Paths of Glory'?", 50, 766, 0);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"Q2: Who directed the movie 'Lawrence of Arabia'?", 50, 718, 0);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"Q3: Who is the director of 'House of Flying Daggers'?", 50, 670, 0);
cb.EndText();
cb.SaveState();
cb.SetRGBColorFill(0xFF, 0x00, 0x00);
cb.BeginText();
cb.BeginLayer(a1);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"A1: Stanley Kubrick", 50, 742, 0);
cb.EndLayer();
cb.BeginLayer(a2);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"A2: David Lean", 50, 694, 0);
cb.EndLayer();
cb.BeginLayer(a3);
cb.ShowTextAligned(Element.ALIGN_LEFT,
"A3: Zhang Yimou", 50, 646, 0);
cb.EndLayer();
cb.EndText();
cb.RestoreState();
List <Object> stateOn = new List <Object>();
stateOn.Add("ON");
stateOn.Add(a1);
stateOn.Add(a2);
stateOn.Add(a3);
PdfAction actionOn = PdfAction.SetOCGstate(stateOn, true);
List <Object> stateOff = new List <Object>();
stateOff.Add("OFF");
stateOff.Add(a1);
stateOff.Add(a2);
stateOff.Add(a3);
PdfAction actionOff = PdfAction.SetOCGstate(stateOff, true);
List <Object> stateToggle = new List <Object>();
stateToggle.Add("Toggle");
stateToggle.Add(a1);
stateToggle.Add(a2);
stateToggle.Add(a3);
PdfAction actionToggle = PdfAction.SetOCGstate(stateToggle, true);
Phrase p = new Phrase("Change the state of the answers:");
Chunk on = new Chunk(" on ").SetAction(actionOn);
p.Add(on);
Chunk off = new Chunk("/ off ").SetAction(actionOff);
p.Add(off);
Chunk toggle = new Chunk("/ toggle").SetAction(actionToggle);
p.Add(toggle);
document.Add(p);
}
}
