Re: [Plplot-devel] problems with plSetOpt: driver-dependent options; no-pause mode under MSWindows

[Joao C. <jc...@fe...>]

On Tuesday 10 December 2002 14:10, Joachim Wuttke wrote:
> Since plSetOpt is not yet documented in the
> on-line reference, here a clue:
> For generic options, use
>     plSetOpt("<option_name>", "<argument>"),
> e.g.
>     plSetOpt("np", "").
> For driver-specific options, in contrast, use
>     plSetOpt("drvopt", "<option_name>=3D<argument>"),
> e.g.
>     plSetOpt("drvopt", "color=3D0").

Amazing! Since I introduced the drvopt cmd line option that I had the=20
intention to provide an API entry to do the same. And it already existed!=
 Not=20
with a clean syntax, tough!

> The W2000 driver has the option "hwnd" which takes
> as argument a pointer to a HWND handle. To use
> this, one has to convert the pointer through
> something like sprintf(drvopt_arg, "hwnd=3D%x", m_hwnd)
> to a string; I doubt whether this has ever been
> tested. A more sensible way to influence the
> plot window from the main application would be
> to pass a number of individual parameters like
> xpos, xwidth, title, ... Is there any convention
> I should follow in introducing such parameters ?

You mean using plSetOpt() to do it? I'm afraid I don't follow you.
Why don't you just write an API entry (and submit it), say=20
plDrvOpt("<option_name", "<value>")?
Ah, "value" must be a string, as different options can ask for different=20
types, ints, floats or strings... this was done in a ugly way when I=20
implemented the drvopt, but I see no other way.

> The option "np" has hitherto been ineffective in
> the Win binding. To correct this, it might be
> sufficient to chnge one line in win3.cpp into
>    dev->nextPlot =3D pls->nopause;

Yes, this is the way interactive drivers work. The plplot core routines e=
ither=20
advance the page or ask the user to hit a key/mouse click, depending on t=
he=20
value of pls->nopause, that can be set/reset using plspause(). Try it and=
=20
submit a patch!

Joao
>
> - Joachim
>
>
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