Scan Barcode how to show data in the label (onBarcodeDataReceived)

Ignition
, ,
#1

Hello.

I’m trying to send information for a Label using the Scan Barcode (with def onBarcodeDataReceived(session, data, context) ).
I can pass information using Tag (system.tag.writeAsync(‘Writable/scantest’, vCamSerial)) but I would like to pass directly to the Label.

Button trigger onClick → Scan Barcode

Session Event:
def onBarcodeDataReceived(session, data, context)
	SCRIPT.canCam([data.text])

Project Library:

def scanCam(vCamSerial):

#works but I don't want to use TAG
 system.tag.writeAsync('Writable/scantest', vCamSerial) 

#not works
 self.getSibling("Label_0").props.text = vCamSerial

Thanks

#2

The event is in the session, so it doesn’t have direct access to pages and views. Send a message at session scope. Have a handler on the label listening for session scope.

#3

Is there some way to read a barcode (mobile onBarcodeDataReceived) to send the value without using TAG.

#4

Yes, send a message to the label with system.perspective.sendMessage.

1 Like
#5

Thanks, I will take a look at this method, I didn’t use sendMessage yet.

#6

Do you have an example? I am trying to get out user can not read codes from other users. is this the best way to use it?

#7

Sorry for the late reply. :man_facepalming:t4:

This is how I did.

Button (Event):
OnActionPerformed:

  def runAction(self, event):
 	Consult.ConsultMaterials.CleanConsult(self)

Script (Project library)

def scanCam(vCamSerial):
	system.perspective.sendMessage(
	'getBarcodeScanned'
	,payload = {
			 'vSession':123
			,'vLabelScanned':vCamSerial
				}
	,scope="session"
	)

OnClick:
Scan Barcode

Script Message Handler: Label that will receive the scan info:

def onMessageReceived(self, payload):
	#getBarcodeScanned -> Message Type 
     #Session, Page -> Listen Scopes

	vSession = payload['vSession']
	vLabelScanned = payload['vLabelScanned']
	
	self.props.text = vLabelScanned
	self.getSibling("tfConsLabelScan").props.text = vLabelScanned
	Consult.ConsultMaterials.ConsultMaterial(self,vLabelScanned)