Hi Sven, Thanks a lot for the positive message!
Indeed, it is a much needed perspective, and I am sure there are many other similar examples. Btw, nice work, too :). Cheers, Doru > On Apr 13, 2018, at 8:47 PM, Sven Van Caekenberghe <s...@stfx.eu> wrote: > > Hi, > > Given that the mailing lists are often used to ask questions when we get in > trouble, report bugs and other issues, conduct public discussion between > strong headed individuals, we quickly forget what a fantastic platform Pharo > is. > > Last month I implemented a rough MVP-style ticket sales platform that was > successfully used to sell and validate at the entrance, about 1000 digital, > online tickets for a relatively large 3000+ attendance event (a party). It > took only a couple of days to build and deploy, and it was a lot of fun - it > was even done in 'unstable' Pharo 7. > > Early on I decided to identify each individual ticket by a unique URL. For > easier presentation and scanning purposes, I encoded that URL in a QR code. > > Although I am grateful for the whole Pharo ecosystem (including Seaside), we > all build on top of other people's work, I was especially happy with Jochen > Rick's QRCode package (http://smalltalkhub.com/#!/~JochenRick/QRCode/). This > is such a great piece of work ! > > It worked right out of the box in Pharo 7 (even though it is from 2013/2014), > was well designed, easy to figure out, was well documented, had unit tests. I > can't say anything bad about it, it is as close to perfect as I have ever > seen. So: thanks Jochen, you made my day ! > > Here is how a ticket generates its own QR code: > > T123Ticket>>#asQRCode > ^ self url asString asQRCode formWithQuietZone magnifyBy: 5 > > Just beautiful. > > It is also easy (for a non-graphics, non-UI person like me) to combine the QR > code with some text: > > T123Ticket >>#asQRCodeWithText > | form font | > form := Form extent: 535 @ 185 depth: 1. > font := LogicalFont familyName: 'Bitmap DejaVu Sans' pointSize: 14. > self asQRCode displayOn: form at: 0 @ 0. > form getCanvas > drawString: self url asString at: 180 @ 20 font: font color: Color black; > drawString: self id36, ' - ', ticketId asString at: 180 @ 45 font: font > color: Color black; > drawString: (name ifNil: [ 'N.N' ]) at: 180 @ 90 font: font color: Color > black; > drawString: (email ifNil: [ '@' ]) at: 180 @ 115 font: font color: Color > black; > drawString: (phone ifNil: [ '+' ]) at: 180 @ 140 font: font color: Color > black. > ^ form > > Next we combine this with a nice template designed by a graphics artist: > > T123Ticket >>#asQRCodeWithTextInTemplate > | templateFile form | > templateFile := 'tickets123-template-{1}.jpg' format: { self event id }. > form := PluginBasedJPEGReadWriter formFromFileNamed: templateFile. > self asQRCodeWithText displayOn: form at: 20@540. > ^ form > > And finally, the ticket form is encoded as a JPEG (to be mailed and so on): > > T123Ticket >>#asJPEGBytes > ^ ByteArray streamContents: [ :out | > PluginBasedJPEGReadWriter putForm: self asQRCodeWithTextInTemplate > onStream: out ] > > <Screen Shot 2018-04-13 at 20.40.54.png> > > I also found GT Inspector very handy (again) in doing back end work (managing > payments and other administration), especially the ability to use Spotter on > a collection open in an inspector. > > Anyway, I know many of you have similar happy experiences, I just wanted to > share (one of) mine. > > Thanks Jochen, thanks everyone. > > Sven > > -- > Sven Van Caekenberghe > Proudly supporting Pharo > http://pharo.org > http://association.pharo.org > http://consortium.pharo.org > > > -- www.tudorgirba.com www.feenk.com "Speaking louder won't make the point worthier."
