MSKLibQREncode

A wrapper around zbar-tools to be used by Gemstone/S database. You may install the Linux stuff via

sudo apt-get install zbar-tools

with these external programs you may create images containing QR codes and you may even read image files to get the content out of the QR code.

How to use it

a) You have a string and want to create a png file, containing the QR code for that string

 | aMSKLibQRTool childState |

  aMSKLibQRTool := MSKLibQRTool newPNGFor: 'www.spiegel.de'  path: '/var/www/html/test.png' .
  childState := aMSKLibQRTool
                  moduleSize: 15 ;
                  checkForToolPath ;
                  removeOutputFile ;
                  createQRCode ;
                  waitForProcessState ;
                  checkForOutputFile ;
                  checkForReturnCode

a.2) Or as an alternative, which does all the checkings automatically:

  | aMSKLibQRTool childState |

  aMSKLibQRTool := MSKLibQRTool newPNGFor: 'www.spiegel1.de'  path: '/var/www/html/test.png' .
  childState := aMSKLibQRTool
                  moduleSize: 15 ;
                  createQRCodeAndWaitForResult

b) You have a QR code (as png file) and want to get the link out of it:

  | aMSKLibQRTool qrInformation |
	aMSKLibQRTool := MSKLibQRTool readQRCodeFromPath: '/var/www/html/test.png' .
	qrInformation := 
	      aMSKLibQRTool
		readQRCode ;
		waitForProcessState ;
		checkForReturnCode ;
		qrContent

b.2) Or an alternative (with all checkings)

  | aMSKLibQRTool |
  	aMSKLibQRTool := MSKLibQRTool readQRCodeFromPath: '/var/www/html/test.png' .
		qrInformation :=  aMSKLibQRTool readQRCodeAndWaitForResult

In case of any errors exceptions should be thrown ...

Installation

You can load MSKLibQREncode using Metacello

Metacello new
  repository: 'github://feldti/MSKLibQREncode:main/repository';
  baseline: 'MSKLibQREncodeLibrary';
  load