/**
* Gets the special field appearance for the radio circle.
* @param on <CODE>true</CODE> for the checked state, <CODE>false</CODE>
* 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);
}
