Barcode reader properties

Camera identifier: An arbitrairy ID which is mapped to the user selected camera and gets stored in the local memory of the browser. If a user loads a barcode reader with the same identifier, the same camera will be initially used.

Auto rotate image: Automatically rotates the image to increase the possibility of a detection. This is a bit slower, but prevents the user from rotating the camera or the document in order to get a proper scan.

B arcode types: Limits the barcode types to be scanned. If no barcode types are selected, all will be identified. ►NOTE◄ The fewer types that are defined, the better the performance of the identification.

Once the barcode reader detects a code during run time, the Barcode scanned trigger will be dispatched.

Barcode reader behaviour

Triggering event: 'Barcode scanned' triggers the behaviour. (A barcode was detected).

Behaviour type: With the 'Calculate' behaviour, for example, the read barcode and the barcode type can be further handled. Here only the input is determined.

Check expression (optional): Further behavior can be determined with a check expression. For example: with $contains($el(12,$true), {text}) it can be checked whether the read barcode has already been read (prevent duplicates). The element with the ID 12 is a repeated text field, which loads the read barcode texts as value.

If, in this example, the check expression returns false, the barcodes are added as a new repeated entry.

Barcode reader element at run time

(1) Video – camera image: The scanning happens automatically and with the behaviour and the actions it is possible to react to it.

►NOTE◄ The barcode reader does not stop automatically when a code is detected. However, this can be triggered by the Stop barcode reading action.

(2) Camera icon: Selection of the camera to use.