Re: Supporting Customer Displays for POS system
- From: "Serge Dosyukov \(Dragon Soft\)" <pooh996.gmail.com>
- Date: Thu, 30 Nov 2006 10:08:17 -0500
If no other solution is applicable would go with "driver" approach
you know what you need to show on the display, put a simple interface and
then provide set of DLL
some displays are working via "keyboard" interface, some via RS-232, others
require special driver.
As far as your app concern, it is just set of known DLLs which implements
same interface.
This is how we did it. Last year of the project was modifying or adding new
"drivers" with almost no modifications for the core itself.
Same applies to the keyboard and card/bar readers used in the system
I didn't really know where else to post this so I am asking here.
I have a Point Of Sale system written in Delphi. I want to be able to
support all manner of customer (pole) displays.
To support various cash drawers I allow the user to select which port
to use and the string to send which opens the drawer. For the display
I also have to allow the user to select the port used but the codes
seem much more complicated and very different for each display.
.
- References:
- Supporting Customer Displays for POS system
- From: Michael Fullerton
- Supporting Customer Displays for POS system
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