Re: expose built-in hotkey functions to the command line

[Petr M. <mi...@ph...>]

> > After the addition of new automatic GPVAL_ variables, I wish to be able to 
> > rebound some hotkeys, for example:
> > 
> > bind Right "if (GPVAL_SPLOT) builtin_rotate_right; \
> > 	else set xrange [GPVAL_X_MIN+100:GPVAL_X_MAX+100]; reread"
> > 
> > I propose to move the "builtin_" functions from the default "bind" command 
> > among other functions callable from the command line.
> 
> What happens if mousing is not active when you call such a function?
> Suppose, for instance, that I am viewing using
> 	"set term png; set output '|display png:-'
> which I frequently do.
> 
> Does calling the function print an error?

no

> Does it force a replot even though this terminal wouldn't normally
> respond to hotkeys?

no

> Does it silently change the view angle internally without changing the 
> displayed image?

In principle, it does not matter. The function is expected to be called for 
interactive terminals only. For other terminals, the behaviour does not make 
good sense. Then it can change the parameters but not call replot. I think 
the interactive terminals can be distinguished by presence of set_cursor() 
function.

I think it could be useful to add flag GPVAL_TERM_INTERACTIVE = {0|1} in 
order to distinguish these terminals. 

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PM