<Camera>.StartDecoding (Function)

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<Camera>.StartDecoding (Function)

In french: <Caméra>.DémarreDécodage

Starts decoding bar codes in a Camera control. You can specify the type of bar code to decode.

Example

// Starts decoding QRCode bar codes in the Camera control
CAM_Camera1.StartDecoding(BC_QRCODE)

Syntax

<Camera control>.StartDecoding([<Bar code type>])

<Camera control>: Control name

Name of the Camera control to be used.

<Bar code type>: Optional Integer constant

Type of bar codes that can be decoded:
BC_AZTEC Aztec bar code.
This type of bar code is available from iOS 7.
BC_CODE128 Code128 bar code.
This type of bar code is available from iOS 7.
BC_CODE39 Code39 bar code.
This type of bar code is available from iOS 7.
BC_CODE93 Code93 bar code.
This type of bar code is available from iOS 7.
BC_DATAMATRIX DATAMATRIX bar code.
Not available.
BC_EAN13 EAN13 bar code.
This type of bar code is available from iOS 7.
BC_EAN8 EAN8 bar code.
This type of bar code is available from iOS 7.
BC_INTER2OF5 Interleaved 2 of 5 bar code.
This type of bar code is available from iOS 7.
BC_PDF417 PDF417 bar code.
This type of bar code is available from iOS 7.
BC_QRCODE QR Code bar code.
BC_UPCA UPC-A bar code.
Not available.
BC_UPCE UPC-E bar code.
This type of bar code is available from iOS 7.
BC_ALL All the types of bar codes supported by this function can be decoded.

If this parameter is not specified:
the bar codes specified last time <Camera>.StartDecoding was called will be decoded.
the bar codes specified in the description window of Camera control will be decoded.

Remarks

The Camera control must have been configured to allow the decoding of bar codes (in the description window). Otherwise, the call to <Camera>.StartDecoding will trigger a fatal error.
When the Camera control is configured to allow the decoding of bar codes (in the description window), the decoding automatically starts when the window is opened. To prevent this behavior, <Camera>.StopDecoding can be called in the initialization event of the Camera control.
If <Camera>.StartDecoding is called when a decoding process is already in progress in the Camera control, the decoding process is stopped and then restarted to take into account the new type of bar code to decode. If the type of bar code is the same, the function has no effect.
When a bar code is detected, the "Decode a bar code" event of the Camera control is called with a BarCode variable as parameter, which corresponds to the detected bar code. If this event returns True, bar code decoding will be automatically stopped.
This function is equivalent to CameraStartDecoding.

Component: wd300android.aar