* 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 (psoares@consiste.pt)
*/
public class RadioCheckField : BaseField {
/** A field with the symbol check */
public const int TYPE_CHECK = 1;
/** A field with the symbol circle */
public const int TYPE_CIRCLE = 2;
/** A field with the symbol cross */
public const int TYPE_CROSS = 3;
/** A field with the symbol diamond */
public const int TYPE_DIAMOND = 4;
/** A field with the symbol square */
public const int TYPE_SQUARE = 5;
/** A field with the symbol star */
public const int TYPE_STAR = 6;
private static String[] typeChars = {"4", "l", "8", "u", "n", "H"};
/**
* Holds value of property checkType.
*/
private int checkType;
/**
* Holds value of property onValue.
*/
private String onValue;
/**
* Holds value of property checked.
*/
private bool vchecked;
/**
* 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) : base(writer, box, fieldName) {
OnValue = onValue;
CheckType = TYPE_CIRCLE;
}
/**
* 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 int CheckType {
get {
return checkType;
}
set {
checkType = value;
if (checkType < TYPE_CHECK || checkType > TYPE_STAR)
checkType = TYPE_CIRCLE;
Text = typeChars[checkType - 1];
Font = BaseFont.CreateFont(BaseFont.ZAPFDINGBATS, BaseFont.WINANSI, false);
}
}
/**
* Sets the value when the field is checked.
* @param onValue the value when the field is checked
*/
public string OnValue {
get {
return onValue;
}
set {
onValue = value;
}
}
/**
* 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 bool Checked {
get {
return vchecked;
}
set {
vchecked = value;
}
}
/**
* 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(bool isRadio, bool on) {
if (isRadio && checkType == TYPE_CIRCLE)
return GetAppearanceRadioCircle(on);
PdfAppearance app = GetBorderAppearance();
if (!on)
return app;
BaseFont ufont = RealFont;
bool borderExtra = borderStyle == PdfBorderDictionary.STYLE_BEVELED || borderStyle == PdfBorderDictionary.STYLE_INSET;
float h = box.Height - 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.Width - 2 * offX;
float ht = box.Height - 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.Width - ufont.GetWidthPoint(text, fsize)) / 2,
(box.Height - 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(bool on) {
PdfAppearance app = PdfAppearance.CreateAppearance(writer, box.Width, box.Height);
switch (rotation) {
case 90:
app.SetMatrix(0, 1, -1, 0, box.Height, 0);
break;
case 180:
app.SetMatrix(-1, 0, 0, -1, box.Width, box.Height);
break;
case 270:
app.SetMatrix(0, -1, 1, 0, 0, box.Width);
break;
}
Rectangle boxc = new Rectangle(app.BoundingBox);
float cx = boxc.Width / 2;
float cy = boxc.Height / 2;
float r = (Math.Min(boxc.Width, boxc.Height) - 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(bool noToggleToOff, bool radiosInUnison) {
PdfFormField field = PdfFormField.CreateRadioButton(writer, noToggleToOff);
if (radiosInUnison)
field.SetFieldFlags(PdfFormField.FF_RADIOSINUNISON);
field.FieldName = fieldName;
if ((options & READ_ONLY) != 0)
field.SetFieldFlags(PdfFormField.FF_READ_ONLY);
if ((options & REQUIRED) != 0)
field.SetFieldFlags(PdfFormField.FF_REQUIRED);
field.ValueAsName = vchecked ? onValue : "Off";
return field;
}
/**
* Gets the radio field. It's only composed of the widget keys and must be used
* with {@link #getRadioGroup(bool,bool)}.
* @return the radio field
* @throws IOException on error
* @throws DocumentException on error
*/
public PdfFormField RadioField {
get {
return GetField(true);
}
}
/**
* Gets the check field.
* @return the check field
* @throws IOException on error
* @throws DocumentException on error
*/
public PdfFormField CheckField {
get {
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(bool isRadio) {
PdfFormField field = null;
if (isRadio)
field = PdfFormField.CreateEmpty(writer);
else
field = PdfFormField.CreateCheckBox(writer);
field.SetWidget(box, PdfAnnotation.HIGHLIGHT_INVERT);
if (!isRadio) {
field.FieldName = fieldName;
if ((options & READ_ONLY) != 0)
field.SetFieldFlags(PdfFormField.FF_READ_ONLY);
if ((options & REQUIRED) != 0)
field.SetFieldFlags(PdfFormField.FF_REQUIRED);
field.ValueAsName = vchecked ? onValue : "Off";
}
if (text != null)
field.MKNormalCaption = text;
if (rotation != 0)
field.MKRotation = rotation;
field.BorderStyle = 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.AppearanceState = vchecked ? onValue : "Off";
PdfAppearance da = (PdfAppearance)tpon.Duplicate;
da.SetFontAndSize(RealFont, fontSize);
if (textColor == null)
da.SetGrayFill(0);
else
da.SetColorFill(textColor);
field.DefaultAppearanceString = da;
if (borderColor != null)
field.MKBorderColor = borderColor;
if (backgroundColor != null)
field.MKBackgroundColor = backgroundColor;
switch (visibility) {
case HIDDEN:
field.Flags = PdfAnnotation.FLAGS_PRINT | PdfAnnotation.FLAGS_HIDDEN;
break;
case VISIBLE_BUT_DOES_NOT_PRINT:
break;
case HIDDEN_BUT_PRINTABLE:
field.Flags = PdfAnnotation.FLAGS_PRINT | PdfAnnotation.FLAGS_NOVIEW;
break;
default:
field.Flags = PdfAnnotation.FLAGS_PRINT;
break;
}
return field;
}
}
}