Hello everyone,
For an application, I have two screens, the top view, and the button view and I toggle between those two screens using an OPT touch button. I created a script in the client tag change script to do that.
Now, I want the user to see the top view screen first when he/she enters the barcode. Is this possible?
The barcode is a memory tag for now, but later on, the barcode should enter a number in a numeric entry box. The barcode uses a USB interface.
I know that I can probably use tag change but not sure where should I add the script. Is it from client events → Tag change or from Tag events → value changed
Thank you in advance for your response.
What I would do is create a client tag called windowToggle or something like that. Create your window swapping script as a client tag change event set to the client toggle tag. Then you can swap windows from several different events by simply writing to the toggle tag.
Thank you for your response.
I am not quite sure how to do the last part.
Basically, what I want to do is when the barcode value changed I want the top view to be shown.
In the client tag I can have a script for the value changed but how does the value of the client tag related to the barcode tag?
I already have a memory tag for my barcode and that has a script to split the 16 digits number of the barcode and assign them to 4 tags.
I think you said that you are reading the serial number into a numeric field. Put a script in the propertyChange event handler on that numeric text field.
if event.propertyName == 'intValue':
system.tag.writeBlocking(['[Client]windowToggle'],[1])
Thank you very much for your response and for helping me with this.
So I have a numeric entry field for my barcode scanner and the Long Value of that numeric field is bounded to a memory tag value.
What I did here based on your advice. I created a boolean client tag called “WindowToggle” and I wrote this script for its tag events → value change.
When this value changed I want the top screen to be shown.
val= system.tag.readBlocking('{[~]WindowToggle}').value
if val:
if system.nav.getCurrentWindow()== "Bottom":
system.nav.swapTo('Top')
else:
system.nav.swapTo('Top')
After that, I wrote a script for that numeric entry box on its property change. The script is:
if event.propertyName == 'LongValue':
system.tag.writeBlocking(['[client]DefaultScreen.Value'],[1])
Although I did not have any errors I still could not see any outcome. My WindowToggle tag did not change upon changing the barcode value. Even when I manually toggle the WindowToggle value ON/OFF the screen does not change to the top view.
You'll want the binary state of the boolean client tag to represent your two windows.
boolean True -> Top
boolean False -> Bottom
So for the window swapping script..
val= system.tag.readBlocking('{[~]WindowToggle}').value
if val:
system.nav.swapTo('Top')
else:
system.nav.swapTo('Bottom')
Also, notice how in your script you have both of your swapping scripts set to swap to Top
Thank you! The thing is I do not want to swap to bottom. I want the top screen to be shown always when the barcode value is changed and then I toggle the screens using an OPT touch button
Although I changed the swapping script as you mentioned. Nothing is changed.
Add some print statements or logger.info() statements to your script to see what is actually being evaluated/if its being triggered at all.
It will only swap to bottom when you write False to the boolean tag. If you want the Top window open any time you scan a barcode, then always write True to the boolean tag. It will only swap to Bottom if you write False.
I wrote this for my boolean WindowToggle client tag on its value change:
But I did not see any outcome in output console.
val= system.tag.readBlocking('{[~]WindowToggle}').value
if val:
print "y"
else:
print "n"
You won’t see that in the output console, the tag is on the gateway not the client. For gateway script printing, you would use a logger
val= system.tag.readBlocking('{[~]WindowToggle}').value
logger = system.util.getLogger("windowToggle")
if val:
logger.info("Toggle Bool: True")
else:
logger.info("Toggle Bool: False")
The logs can be seen on the gateway webpage (Status → Diagnostics → Logs)
Thank you!
I copy pasted your script:
However, I do not see any logs, the picture below is for my recent logs:
Also I have my tag as a client tag.
Type in “WindowToggle” in the filter
Since you are doing this in the tag itself and not the client tag change event script, do this instead
if not initialChange:
logger = system.util.getLogger("windowToggle")
if currentValue.value:
logger.info("Toggle Bool: True")
else:
logger.info("Toggle Bool: False")
Oops, also it was windowToggle not WindowToggle
I tried this both with WindowToggle and windowToggle. Also, I wrote my script in the tag itself (Vision Client Tags → Tag Events → Value Changed.) . I could not see anything in the output console nor could I see it in the log infor.
However, if I write this in the client tag change event script, I get the response in the output console:
So should I continue in the client tag change event?
If its a client tag it is in the client logs. You have to go to your Diagnostics page in the client to see client logs.
I totally missed that it was a client tag 
