Re: Problem printing text with wxWidgets 3.2.2.1

Il 13/09/2023 22:41, Vadim Zeitlin ha scritto:
> FS> Create a class to encapsulate a print job. Add methods to start the job,
> FS> write text and some graphics primitives, to start a new page and to end
> FS> the job starting the real printing process.
> FS>
> FS> All method calls are stored in memory until the job is ended, then real
> FS> printing begins. A printout is created and all the commands are
> FS> retrieved from memory ed executed in the printout.
> FS>
> FS> This ought to shield the user from the complexity of printing,
> FS> presenting a very simple interface.
> FS>
> FS> Do you think that this is a reasonable approach?
> 
>   AFAICS this means reimplementing Windows metafiles in wxWidgets or, at
> least, something very similar to it, and this is not easy to do at all and
> all but impossible to do efficiently at our level.
> 

I never used metafiles so don't understand your sentence. Isn't it 
possible to store the metafile in memory and print it later, together 
with the other commands?

Anyway, I was thinking of this class of a simple way to print simple 
documents, mainly text-based. Just think of a report. In this case it 
ought to be enough to support text, some simple graphic primitives and 
images in a few standard formats.

If the purpose is to support everything then the task would be different.

>   I think we need to keep the idea of having some function called with wxDC
> parameter and rendering onto it. But it could be a callback instead of a
> virtual function, e.g. a std::function<void (int page, wxDC&)> or something
> like this.
> 

This is surely a good idea. We could also add a function to get the wxDC.

Fulvio

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