LiveCode Forums.

Posted: **Fri Feb 07, 2020 10:40 pm**

Hi team, I'm running the example given on the dictionary for the qrCreate command and it seems to be working fine except that no image is displayed. Not sure what am I doing wrong and any help will be appreciated.

For now I'm on IDE on macOS Mojave 10.14 & LC 9.5.1

My card has on button with mouseUp script and one image named "img1"

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on mouseUp
   put "M" into tECC
   put 3 into tSize
   put "132" into tData
   -- example how to use qrCreate with LiveCode server
   qrCreate "!", tData, tECC, tSize
   put the result into tData
   answer tData

    if tData begins with "Error" then
      put tData
      answer "Error:" && tData
   else
      # line 1 of the result contains some info
      # the remaining lines contain the png image data
      put line 1 of tData into tInfo
      delete line 1 of tData
      
      put "<b>Qr code info</b><br/>" & LF
      put "Version: " & item 1 of tInfo & "<br/>" & LF
      put "ECC: " & item 2 of tInfo & "<br/>" & LF
      put "Mode: " & item 3 of tInfo & "<br/>" & LF
      put "Mask: " & item 4 of tInfo & "<br/>" & LF
      
      # show the image
      put base64Encode(tData) into tData
      replace LF with empty in tData
      put "<img src='data:image/png;base64," & tData & "'/><br/>" & LF into img "img1"
   end if
end mouseUp

The picture below is the result of answer tData

Posted: **Fri Feb 07, 2020 11:36 pm**

Hi.

Never used this before, but the parameters may need checking. For example, is a "132" valid for tData? And is it permitted to omit the rest of the parameters? The dictionary does not seem to offer these as optional values, as it usually does with, for example the date:

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the [{ long | abbreviated | short }] [{ english | system }] date

I am not sure about any of this, of course.

Craig

Posted: **Sat Feb 08, 2020 1:54 am**

Hi Craig, many thanks for your answer. I found it! It was not about the parameters, in order to show the generated qrCode in an image field the following lines should not be there

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   put base64Encode(tData) into tData
   replace LF with empty in tData

and

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    put "<img src='data:image/png;base64," & tData & "'/><br/>" & LF into img "img1"

has to be replaced by

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set the text of image "img1" to tData

So the final (working) code is:

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on mouseUP
   put "M" into tECC
   put 3 into tSize
   put "132" into tData
   qrCreate "!", tData, tECC, tSize
   put the result into tData
  if tData begins with "Error" then
      put tData
   else
      # line 1 of the result contains some info
      # the remaining lines contain the png image data
     delete line 1 of tData
    
      # show the image
       put tData into image "img1"
   end if
end mouseUp

which retrieves the expected QRCode

: Screen Shot 2020-02-07 at 21.52.47.png (5.15 KiB) Viewed 4979 times

Posted: **Fri Jul 17, 2020 1:08 pm**

I needed a QR code generator and rather than go on line, I found this for LC
I copied and pasted this as a stack and it worked perfectly in the editor, but does nothing when made into an EXE.
Did anyone else find this issue?
Win 10 Version 2004 OS build 19041.388
Running LC Community 9.6
Thanks

Posted: **Fri Jul 17, 2020 9:24 pm**

In the standalone builder settings, check you have the qr library included. If you're letting LiveCode search for inclusions automatically, then try turning that off and manually selecting the qr library (as well as any others needed).

LiveCode Forums.

SOLVED: Can't display the QRCode generated with qrCreate

SOLVED: Can't display the QRCode generated with qrCreate

Re: Can't display the QRCode generated with qrCreate

Re: Can't display the QRCode generated with qrCreate

Re: SOLVED: Can't display the QRCode generated with qrCreate

Re: SOLVED: Can't display the QRCode generated with qrCreate