TdxBarCodeQRCodeSymbology Class

The QR Code symbology class.

Declaration

TdxBarCodeQRCodeSymbology = class(
    TdxCustomBarCodeSymbology
)

Remarks

QR Codes (QR is the abbreviation for Quick Response) are two-dimensional codes, readable by QR scanners, mobile phones, etc. QR Codes can encode textual, numeric, and binary data. The amount of data stored depends on the selected data type, version, and error correction level.

This class extends its ancestor with properties that allow you to:

Specify the amount of redundant information added to the generated QR Code (ErrorCorrectionLevel);
Specify the encoded data type (CompactionMode);
Change the amount of information that can be stored within the generated QR Code (Version).

To enable the QR Code generation mode, assign the TdxBarCodeQRCodeSymbology class name to the Properties.BarCodeSymbologyClassName property provided by the unbound and data-aware barcode controls.

The dxBarCodeQRCodeLeftQuietZoneSize, dxBarCodeQRCodeTopQuietZoneSize, dxBarCodeQRCodeRightQuietZoneSize, and dxBarCodeQRCodeBottomQuietZoneSize global constant values determine the QR code’s left, top, right, and bottom quiet zone sizes.