Scan a QR code and decode it using p:photoCam

Question

I need to capture and read a QR Code while the camera is capturing, all of this in a JSF Application.

I have already read a QR Code in a photo, but for now I have to

Answer 1

PrimeFaces Extensions 9 will have a pe:codeScanner component to scan bar and QR codes from a device camera.

<pe:codeScanner width="600"
                height="400">
  <p:ajax event="codeScanned"
          listener="#{codeScannerController.onCodeScanned}"/>
</pe:codeScanner>

Source: https://github.com/primefaces-extensions/primefaces-extensions/blob/master/showcase/src/main/webapp/sections/codeScanner/example-basicUsage.xhtml

public void onCodeScanned(final SelectEvent<Code> event) {
    final Code code = event.getObject();
    FacesContext.getCurrentInstance().addMessage(
                null,
                new FacesMessage(FacesMessage.SEVERITY_INFO,
                            String.format("Scanned: %s (%s)", code.getValue(), code.getFormat()),
                            null));
}

Source: https://github.com/primefaces-extensions/primefaces-extensions/blob/master/showcase/src/main/java/org/primefaces/extensions/showcase/controller/codescanner/CodeScannerController.java