protected override void Draw(IBarCodeBuilder builder, string data)
{
ValidateCharacters(data);
// store the current data
string oldData = data;
// translate the extended characters
data = Code39Translator.TranslateExtended(data);
data = AppendChecksum(data);
BitArray encoded = Encoder.Encode(data);
BitArray guard = Encoder.Encode("*");
float totalWidth = SymbolWidth * data.Length + GuardWidth + OffsetWidth * 2 + QuietZone * 2 + CalculateExtraWidth(guard, guard, encoded);
// set the canvas size
builder.Prepare(totalWidth, TotalHeight);
// draw the background
builder.DrawRectangle(BackColor, 0, 0, totalWidth, TotalHeight);
// draw the barcode
float x = 0, y = 0;
float textX = x + totalWidth / 2;
x += OffsetWidth + QuietZone;
y += OffsetHeight + ExtraTopHeight;
x = DrawSymbol(builder, x, y, BarHeight, guard);
x = DrawSymbol(builder, x, y, BarHeight, encoded);
x = DrawSymbol(builder, x, y, BarHeight, guard);
DrawText(builder, true, new float[] { textX }, y - TextHeight, new string[] { oldData });
}
public string Calculate(string data)
{
int sum = 0;
foreach (char c in data)
{
sum += Code39Translator.CheckValue(c);
}
return((sum % 43).ToString());
}
