[fpc-pascal] FPC Graphics options?

[Nikolay Nikolov]

On 05/16/2017 09:00 AM, Sven Barth via fpc-pascal wrote:
>
> Am 16.05.2017 02:46 schrieb "Nikolay Nikolov" <nickysn at gmail.com 
> <mailto:nickysn at gmail.com>>:
> >> I also no longer have the 'graphwindow' handle variable so I had to 
> comment out anything that was using it like
> >>
> >> SetWindowTextA(graphicwindow,graphwindowtext);
> >> And
> >> ShowWindow(graphwindow, SW_SHOW);
> >> So I just commented them out for now.    I'm hoping there is a way 
> to get around the graphwindow variable because I was using the above 2 
> functions and I don't know how else to determine the graphic window 
> handle... but the performance gain and ease of implementation will 
> make working out any other issues worth the effort.  Any advice on how 
> I can capture the graph window handle would be appreciated
> >
> > Unfortunately, you can't do that and it's actually the main reason 
> why ptcgraph is fast. Even if you modify the ptcgraph source, so that 
> you get the window handle, it would do you no good, because the window 
> is created in a different thread and this means that you cannot draw 
> to the window from your program's thread. In fact, all the ptcgraph 
> drawing routines actually render to an internal software buffer and 
> issue no winapi drawing calls at all. That's the reason ptcgraph is 
> fast and the regular graph unit is slow - the winapi drawing routines 
> are really the bottleneck in this case and not the speed of the code, 
> generated by FPC.
>
> Hmm? But he only wants to change the tttle of the window. Even on 
> Windows that should work from a different thread. However a platform 
> independent SetWindowTitle() for ptcgraph would be rather useful I guess.
>
I can easily add this option to ptcgraph. I'll do it tonight.
>
> Though I'd like to know why he needs ShowWindow()...
>
> Regards,
> Sven
>
>
>
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