[reportlab-users] Drawing QRcode

[Vaibhav Gajengi]

Hello,

One more Q i want to ask about the rendering the pdf.
i am using the below code snipet for rendering QR Code on the pdf but its
not rendering the pdf on given x & y co-ordinates ?
renderPDF.draw(d,p,x,y)
is is there any reason for that ?
Can you explain me the same ??
Any help Appreciated .


Best Regards
Vaibhav



On 27 August 2014 14:58, Vaibhav Gajengi <vaibhav.gajengi at gmail.com> wrote:

> Hello ,
> I tried using that but its not giving me the result.
> Can you explain me which info should i give for size of widget ?
> I tried with by giving the parameters as below. but i am not getting the
> exact use of this parameters.
>
> Below is the code part
> qrw = QrCodeWidget(item,barHeight=10*mm,barWidth=10*mm,barBorder=6)
> Can you explain the above paramters ?
>
> Thanks
> Vaibhav
>
>
> On 26 August 2014 22:31, Tim Roberts <timr at probo.com> wrote:
>
>>  Vaibhav Gajengi wrote:
>>
>>
>> I want to ask one basic stuff regarding QRcode generation.
>> I am using the reportlab 2.7 for drawing the QRcode i want to draw the
>> QRcode of 10mm * 10mm.
>>
>>  i want help regarding how to set the width & height of QRcode.
>>
>>  my code snippet is :
>> qrw = QrCodeWidget(itemtodraw,height=10*mm,width=10*mm)
>>
>>  But its not getting correctly drawn of 10*mm by 10*mm
>>
>>
>> There are a couple of things going on here.
>>
>> You can't make a QR code arbitrarily small.  The size of the widget
>> depends on the amount of information you are embedding in the code.  The
>> QrCodeWidget here ignores the width and height you supply.  It generates an
>> object using nominal sizing.  You then find out with qrw.getBounds() how
>> large the nominal code is.
>>
>> Once you have that, you can scale the code yourself to fit the spot you
>> have for it when you embed it in a drawing object.  This is why you see
>> this code in virtually every QR example:
>>     b = qrw.getBounds()
>>     w = b[2]-b[0]
>>     h = b[3]-b[1]
>>
>> So, this will do what you ask, but the results aren't very interesting
>> because 10mm is just too small:
>>
>> unit = 10*mm
>> qrw = QrCodeWidget('hello cruel world!')
>> b = qrw.getBounds()
>> w = b[2]-b[0]
>> h = b[3]-b[1]
>> d = Drawing(unit,unit,transform=[unit/w,0,0,unit/h,0,0])
>> d.add(qrw)
>>
>> --
>> Tim Roberts, timr at probo.com
>> Providenza & Boekelheide, Inc.
>>
>>
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>> reportlab-users at lists2.reportlab.com
>> http://two.pairlist.net/mailman/listinfo/reportlab-users
>>
>>
>
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