QR and barcode
Hans Karlsen (talk | contribs) (Created page with "To get the functionality to generate QR codes in Turnkey follow this pattern: none|thumb|577x577px Add a class ZXing (this is the open source...") |
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In the application (a returns and reclamation system) where this was used first we added a derived attribute like so: | In the application (a returns and reclamation system) where this was used first we added a derived attribute like so: | ||
QRCode: Blob , DerivationOcl = ZXing.QRImage(300,300, | QRCode: Blob , DerivationOcl = ZXing.QRImage(300,300,’https://reklamation.azurewebsites.net/MDriven/DisplayWithVariables?view=TestQRCodeFromVariable&id=$null$&vLopnummer=’+self.Lopnummer.asstring) | ||
The Method must be marked with Tagged Value : Eco.ExternalLateBound = AnyValue | |||
Let me explain the Ocl a bit: | Let me explain the Ocl a bit: | ||
ZXing.QRImage(300,300, theUrl) – this calls the static method QRImage on class ZXing, stating that the QRCode should be 300×300 pixels – in order for this to be legal in Ocl we must have the QRImage method marked as IsQuery. | ZXing.QRImage(300,300, theUrl) – this calls the static method QRImage on class ZXing, stating that the QRCode should be 300×300 pixels – in order for this to be legal in Ocl we must have the QRImage method marked as IsQuery. | ||
Revision as of 08:58, 2 August 2018
To get the functionality to generate QR codes in Turnkey follow this pattern:
Add a class ZXing (this is the open source QR-code library we use, credits go to everyone involved in that). Add a static method with this signature QRImage(width:Integer; height:Integer; value:String):Image – and then you have access.
In the application (a returns and reclamation system) where this was used first we added a derived attribute like so:
QRCode: Blob , DerivationOcl = ZXing.QRImage(300,300,’https://reklamation.azurewebsites.net/MDriven/DisplayWithVariables?view=TestQRCodeFromVariable&id=$null$&vLopnummer=’+self.Lopnummer.asstring)
The Method must be marked with Tagged Value : Eco.ExternalLateBound = AnyValue
Let me explain the Ocl a bit:
ZXing.QRImage(300,300, theUrl) – this calls the static method QRImage on class ZXing, stating that the QRCode should be 300×300 pixels – in order for this to be legal in Ocl we must have the QRImage method marked as IsQuery.
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