/// <summary>
/// Draws barcode referenced points.
/// </summary>
/// <param name="canvas">The canvas.</param>
/// <param name="barcodeInfo">The barcode.</param>
/// <param name="paint">The paint information.</param>
private void DrawBarcodeReferencePoints(Canvas canvas, IBarcodeInfo barcodeInfo, Paint paint)
{
BarcodeInfo2D barcodeInfo2D = barcodeInfo as BarcodeInfo2D;
// if barcode is 2D barcode
if (barcodeInfo2D != null)
{
float cellSize = (float)(barcodeInfo2D.CellWidth + barcodeInfo2D.CellHeight) / 2;
if (cellSize > 15)
{
cellSize = 15;
}
foreach (System.Drawing.PointF point in barcodeInfo2D.GetReferencePoints())
{
canvas.DrawCircle(point.X, point.Y, cellSize / 2, paint);
}
}
}
/// <summary>
/// Draws the barcode information.
/// </summary>
/// <param name="canvas">A canvas.</param>
/// <param name="paint">A paint information.</param>
/// <param name="barcodeInfo">A barcode.</param>
/// <param name="scale">A scale value.</param>
private void DrawBarcodeInfo(Canvas canvas, Paint paint, IBarcodeInfo barcodeInfo, float scale)
{
int alpha;
// get barcode region
Region barcodeRegion = barcodeInfo.Region;
if (barcodeRegion == null)
{
return;
}
// determines whether barcode region should be filled
bool fill;
// if confidence of barcode recognition is "-1"
if (barcodeInfo.Confidence == -1)
{
alpha = 48;
paint.Color = Color.LimeGreen;
fill = true;
}
// if confidence of barcode recognition is no less than "95"
else if (barcodeInfo.Confidence >= 95)
{
alpha = 64;
paint.Color = Color.LimeGreen;
fill = true;
}
// if confidence of barcode recognition between 0 and 95
else
{
paint.Color = Color.Red;
BarcodeInfo2D barcodeInfo2D = barcodeInfo as BarcodeInfo2D;
if (barcodeInfo2D != null && barcodeInfo2D.GetReferencePoints().Length > 0)
{
alpha = 64;
fill = false;
}
else
{
alpha = 32;
fill = true;
}
}
// if barcode region should be filled
if (fill)
{
paint.Alpha = alpha;
// fill barcode region
FillRegion(canvas, barcodeInfo.Region, paint);
}
paint.Alpha = alpha * 3;
// if confidence of barcode recognition is no less than "95"
if (barcodeInfo.Confidence >= 95)
{
paint.Color = Color.Orange;
}
// draw barcode reference points
DrawBarcodeReferencePoints(canvas, barcodeInfo, paint);
// if need draw barcode type
if (barcodeInfo.BarcodeInfoClass == BarcodeInfoClass.Barcode2D || barcodeInfo.Confidence == -1 || barcodeInfo.Confidence >= 95)
{
// get barcode type name
string text = Utils.GetBarcodeTypeString(barcodeInfo);
// draw barcode type name
DrawText(canvas, barcodeInfo.Region.Rectangle, text, _textSizeInPixels / scale, paint.Color, 255, true);
}
}
/// <summary>
/// Returns a string with extended barcode info.
/// </summary>
/// <param name="barcodeInfo">A barcode info.</param>
/// <param name="textEncodingName">A text encoding name.</param>
/// <returns>
/// A string with extended barcode info.
/// </returns>
internal string GetExtendedBarcodeInfoString(IBarcodeInfo barcodeInfo, string textEncodingName)
{
// if barcode info is empty
if (barcodeInfo == null)
{
return(string.Empty);
}
IBarcodeInfo info;
if (barcodeInfo is BarcodeSubsetInfo)
{
info = ((BarcodeSubsetInfo)barcodeInfo).BaseBarcodeInfo;
}
else
{
info = barcodeInfo;
}
StringBuilder extendedInfo = new StringBuilder();
// append barcode value
try
{
extendedInfo.AppendLine(Utils.GetEncodedBarcodeValue(barcodeInfo, textEncodingName));
}
catch (NotSupportedException)
{
extendedInfo.AppendLine(Utils.GetEncodedBarcodeValue(barcodeInfo, "-1"));
}
extendedInfo.AppendLine();
extendedInfo.AppendLine(Resources.GetString(Resource.String.metadata_message));
extendedInfo.AppendLine();
// if barcode is 2D barcode
if (info is BarcodeInfo2D)
{
// get 2D barcode info
BarcodeInfo2D info2D = (BarcodeInfo2D)info;
// get matrix size
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.matrix_size_message), info2D.MatrixWidth, info2D.MatrixHeight));
// get cell size
extendedInfo.AppendLine(string.Format(CultureInfo.InvariantCulture, Resources.GetString(Resource.String.cell_size_message),
info2D.CellWidth, info2D.CellHeight));
if (info2D.IsMirrored)
{
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.mirrored_message), info2D.IsMirrored));
}
}
// if barcode is 1D barcode
if (info is BarcodeInfo1D)
{
// get 1D barcode info
BarcodeInfo1D info1D = (BarcodeInfo1D)info;
// get narrow bar count
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.narrow_bar_count_message), info1D.NarrowBarCount));
// get narrow bar size
extendedInfo.AppendLine(string.Format(CultureInfo.InvariantCulture, Resources.GetString(Resource.String.narrow_bar_size_message), info1D.NarrowBarSize));
}
if (info.SymbolComponents != null)
{
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_component_count_message), info.SymbolComponents.Length));
}
if (info is StructuredAppendBarcodeInfo)
{
extendedInfo.AppendLine(Resources.GetString(Resource.String.reconstructed_message));
}
else
{
switch (info.BarcodeType)
{
// if barcode is PDF417
case BarcodeType.PDF417:
case BarcodeType.PDF417Compact:
// get PDF417 barcode info
PDF417Info pdf417Info = (PDF417Info)info;
// get rows count
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.rows_count_message), pdf417Info.RowsCount));
// get error correction level
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.error_correction_level_message),
Utils.PDF417ErrorCorrectionLevelToString(pdf417Info.ErrorCorrectionLevel)));
break;
// if barcode is MicroPDF417
case BarcodeType.MicroPDF417:
// get MicroPDF417 barcode info
MicroPDF417Info microPdf417Info = (MicroPDF417Info)info;
// get symbol type
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_type_message),
Utils.MicroPDF417SymbolTypeToString(microPdf417Info.SymbolType)));
break;
// if barcode if DataMatrix
case BarcodeType.DataMatrix:
// get DataMatrix barcode info
DataMatrixInfo dataMatrixInfo = (DataMatrixInfo)info;
// get symbol type
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_type_message),
Utils.DataMatrixSymbolTypeToString(dataMatrixInfo.Symbol.SymbolType)));
break;
// if barcode is QR
case BarcodeType.MicroQR:
case BarcodeType.QR:
// get QR barcode info
QRInfo qrInfo = (QRInfo)info;
// get symbol version
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_version_message),
Utils.QRSymbolVersionToString(qrInfo.Symbol.Version)));
// get error correction level
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.error_correction_level_message),
Utils.QRErrorCorrectionLevelToString(qrInfo.ErrorCorrectionLevel)));
break;
// if barcode is Aztec
case BarcodeType.Aztec:
// get Aztec barcode info
AztecInfo aztecInfo = (AztecInfo)info;
// get symbol type
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_type_message),
Utils.AztecSymbolTypeToString(aztecInfo.Symbol.SymbolType)));
// get data layers
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.data_layers_message), aztecInfo.Symbol.DataLayers));
// get error correction data
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.error_correction_data_message),
aztecInfo.Symbol.ErrorCorrectionData.ToString("F3")));
break;
// if barcode is HanXin
case BarcodeType.HanXinCode:
// get HanXin barcode info
HanXinCodeInfo hanXinInfo = (HanXinCodeInfo)info;
// get symbol version
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.symbol_version_message),
Utils.HanXinCodeSymbolVersionToString(hanXinInfo.Symbol.Version)));
// get error correction level
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.error_correction_level_message),
Utils.HanXinCodeErrorCorrectionLevelToString(hanXinInfo.Symbol.ErrorCorrectionLevel)));
break;
// if barcode is MaxiCode
case BarcodeType.MaxiCode:
// get MaxiCode barcode info
MaxiCodeInfo maxiCodeInfo = (MaxiCodeInfo)info;
// get encoding mode
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.encoding_mode_message),
Utils.MaxiCodeEncodingModeToString(maxiCodeInfo.EncodingMode)));
break;
// if barcode is RSS14
case BarcodeType.RSS14:
case BarcodeType.RSS14Stacked:
case BarcodeType.RSSExpanded:
case BarcodeType.RSSExpandedStacked:
case BarcodeType.RSSLimited:
// get RSS barcode info
RSSInfo rssInfo = (RSSInfo)info;
// get segments count
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.segments_count_message), rssInfo.SegmentsCount));
// get rows count
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.rows_count_message), rssInfo.RowsCount));
// get segments in row
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.segments_in_row_message), rssInfo.SegmentsInRow));
// get linkage flag
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.linkage_flag_message), rssInfo.LinkageFlag));
break;
// if barcode is UPCE
case BarcodeType.UPCE:
// get UPCE barcode info
UPCEANInfo upcEANInfo = (UPCEANInfo)info;
// get UPCE value
extendedInfo.AppendLine(string.Format(Resources.GetString(Resource.String.upce_value_message), upcEANInfo.UPCEValue));
break;
}
}
extendedInfo.AppendLine(string.Format(CultureInfo.InvariantCulture, Resources.GetString(Resource.String.recognition_quality_message), info.ReadingQuality));
return(extendedInfo.ToString());
}
