[Gambas-user] About Printer

[Fabien Bodard]

Le 19 juillet 2011 16:10, Benoît Minisini
<gambas at ...1...> a écrit :
>> Le 19 juillet 2011 15:40, Benoît Minisini
>>
>> <gambas at ...1...> a écrit :
>> >> Benoit,
>> >>
>> >> Paint.scale work good if there is not text ..; but if there is ...
>> >> then text font size is increased by the scale too
>> >
>> > This is normal. This it the goal of that matrix: everything is scaled. I
>> > added a remark about that on the "How to print" wiki page.
>> >
>> > And your SC() function is incorrect, as it assumes that Paint.Width and
>> > Paint.Height use Point units. Which is the case in Qt apparently, but you
>> > must not make such assumptions.
>>
>> well i've just say i want to talk in millimeter ... nothing more.
>>
>> I have two property ... a value in point (yes paint.height MUST to be
>> always in point) and a resolution.
>>
>> i know how many point i've in one inch ... i know how many
>> millimerters in one inch (25.4) so i've done a small function that
>> convert
>> mm in nbr points for the current painting device to match the value in mm.
>>
>> well it's not perfect ... but is there another way ? (it's the way
>> used internally by gb.report)
>>
>
> Don't suppose that Paint.Width or Paint.Height are points. But you can be sure
> that the number of units of Paint.Width equals Printer.PaperWidth in
> millimeters (provided that FullPage is set of course).
>
>>
>> Then M.Cs say : what about printer natural margins ? How to know them
>> ? Is there a way to retrive them ?
>
> Logically yes, but if I didn't do it, I would say there is a problem.
>
> Anyway, I have designed and printed a lot of report of hundreds of pages on
> many many different printers in my previous job. Trust me, you should not take
> these margins into account, and always use the full page to print.
>
>>
>> For exemple he have a paper pattern (caneva) he need to place exactly
>> text on it ... on different printers.. but the natural printers
>> margins are not taked into account .
>>
>> For reports or others, we need to be sure to start from O,O to
>> pagetolalW, pagetotalH without any margins. But we need to know
>> margins to alert the user when he draw sometning
>
> This is up to the printer driver normally.
>
> Users know there is a non-printable margin. If they don't, they will learn
> quickly at the first print. By not using what the printer driver may report
> about its margins, the user have to define its own margin, and so its printing
> will be the same whatever the printer is.
>
> And think about generating a PDF and then sending it to the printer. When are
> the printer margins taken into account? Do you have a margin inside the PDF,
> and then another margin when printing?
>
> So, don't use printer margins. Use user-defined margins.
>
> Of course, if I find a way to get these printer margins accurately, I will add
> the needed properties to the Printer class.
>
> But as I said loudly, this is not a good idea. I'm even thinking about
> removing the FullPage property and set it to TRUE by default!

Do It !!!!

And if you found a way to get printer margins ... just add read only
properties ... we just need to know
the printer minimal capabilities to set up users magins accurately

>
> --
> Benoît Minisini
>
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-- 
Fabien Bodard