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Re: Dynamic Paperlength for PS or PDF device
From: |
Deri |
Subject: |
Re: Dynamic Paperlength for PS or PDF device |
Date: |
Thu, 08 Dec 2022 23:47:56 +0000 |
On Thursday, 8 December 2022 17:19:49 GMT G. Branden Robinson wrote:
> Hi Wim,
>
> At 2022-12-08T15:51:07+0100, Wim Stockman wrote:
> > I am making a simple cash register with a ticket printer. and I want
> > to figure out how I can detect how long my physical paper should be
> > without cutting some text off. So I can set it for the device. The
> > width is fixed so that is no issue. Eventually I can run it in some
> > loop and detect when it stops having more than one page.
>
> I reckon I would have a couple of macros that open and close a
> diversion, then measure against an argument that specifies the limit
> imposed by the hardware (i.e., length of paper roll remaining).
>
> Here's a conceptual sketch.
>
> .de StartTicket
> . br
> . di Ticket
> ..
> .
> .de EndTicket
> . di
> ..
> .
> .while 1 \{\
> . StartTicket
> .\" input for ticket text goes here
> . EndTicket
> . if (\n[dn] > \n[ticket-printer-paper-length]) \
> . ab ticket too long for remaining paper; aborting
> .\}
>
> Please clarify if I've overlooked a requirement.
>
> Regards,
> Branden
I'm probably missing something here, but ticket printers are normally
continuous rolls with a cutter, so isn't this a problem of controlling the
cutter rather than specifying a media size. There is usually a printer option
to cut after each print job, so if you make each receipt a separate print job,
it should do the cutting for you. Just give groff a sufficiently long page
length for the longest ticket you expect.
I have a Brother thermal printer which I use for labels, but it will take a
continuous role instead, and I believe it has a proprietary EscP command for
controlling the cutting, so there may be a solution using something similar.
Cheers
Deri
- Dynamic Paperlength for PS or PDF device, Wim Stockman, 2022/12/08
- Re: Dynamic Paperlength for PS or PDF device, G. Branden Robinson, 2022/12/08
- Re: Dynamic Paperlength for PS or PDF device,
Deri <=
- Re: Dynamic Paperlength for PS or PDF device, Wim Stockman, 2022/12/09
- Re: Dynamic Paperlength for PS or PDF device, John Gardner, 2022/12/09
- Re: Dynamic Paperlength for PS or PDF device, Ralph Corderoy, 2022/12/10
- Re: Dynamic Paperlength for PS or PDF device, John Gardner, 2022/12/10
- Footie. (Was: Dynamic Paperlength for PS or PDF device), Ralph Corderoy, 2022/12/10
- Re: Dynamic Paperlength for PS or PDF device, Wim Stockman, 2022/12/10
- Re: Dynamic Paperlength for PS or PDF device, Wim Stockman, 2022/12/14
- Re: Dynamic Paperlength for PS or PDF device, Oliver Corff, 2022/12/14
- Re: linking/compile error / Dynamic Paperlength for PS or PDF device, G. Branden Robinson, 2022/12/09