[Gambas-user] Trying how many pages before printing

[Rolf-Werner Eilert]

Am 25.09.2014 14:33, schrieb Benoît Minisini:
> Le 25/09/2014 09:05, Rolf-Werner Eilert a écrit :
>> Hi folks,
>>
>> The only thing that keeps me from actually converting all my Gambas2
>> stuff into Gambas3 is the printing function. There are situations when
>> you don't know how many pages you will end up with when starting to
>> print. For instance, there are tables or longer texts which might be
>> more than one page - or not.
>>
>> So it's necessary to figure out how many pages to print prior to start
>> printing. In case of a simple line-by-line text or table, you can simply
>> compute the space needed in advance. But in some cases, I have much more
>> complex situations, and then it would be easiest to have a way to run a
>> simple pre-print and count the pages.
>>
>> In those Gambas2 projects I mean, I have e. g. a printing function that
>> runs in a DO LOOP. When printing reaches the end of the page, it simply
>> opens a new page, jumps to the start position and continues printing there.
>>
>> How do you solve this for Gambas3? I thought, a simple way would be to
>> order a single page, printing into a temporary pdf, and look if there is
>> another page needed, order another one-page print, and so on. Counting
>> each page, you produce only a one-page temporary pdf. Then you start the
>> actual printing with the counted number of pages.
>>
>> Am I completely wrong here? Do you know a better/easier way?
>>
>> Thank you for any input!
>>
>> Rolf
>>
>
> You must know how many pages you have to print before printing,
> otherwise the user won't be able to see a preview, won't be able to
> print the pages it wants, and won't know if clicking on the print button
> will generate one page or one thousand.
>
> To know how many pages you have to print, you have to compute the layout
> of your printing. And yes, it may mean printing the things twice. One
> virtually to compute the number of pages, and one for real.
>
> Regards,
>

Ok, thank you Benoit for making that clear! I just wanted to know if I'm 
on the right way here.

Regards
Rolf