Re: cursor() feedback

Cool, thanks.  It looks like xinterval and yinterval don't allow any 
additional
input, just the mouse click.  So I'd need to stick with cursor(,,) for more
complicated stuff.

I can't tell from the help file, but it looks like the third (ch) parameter is
just a pass-through for _pgcurs.  It appears that ch == "A" if I just 
click the
mouse with no keypress... do you know if that is the general behavior?

Thanks,
Rob


Quoting John Houck <houck_at_email.domain.hidden
> On Thu, Dec 20, 2007 at 11:08 -0500, rgibson_at_email.domain.hidden>> Tame question:  Is there any way to get return code type information from
>> cursor()?
>>
>> I'm using cursor to define ignore regions for fitting, so I keep clicking on
>> pairs of points, and each pair of points is considered an ignore 
>> region.  The
>> trick is to know when I've finished selecting regions.
>>
>> I've decided that clicking on the same "pixel" twice (basically,
>> double-clicking) indicates that I'm done.  (Hitting "q" also 
>> apparently returns
>> the position of the mouse, but I still have to hit it twice.)  
>> Alternately, I
>> can click in special regions, but those are tricky to define.
>>
>> If there is a way to get this information, it would be useful for 
>> implementing
>> state machines (such as the simple one I've described) that involve
>> point-clicking.
>>
>> Thanks,
>> Rob
>>
>
> There are several alternatives:
>  (xmin, xmax) = xinterval;
>  (ymin, ymax) = yinterval;
>  cursor (&x, &y, &ch);
>
> For details, try:
>  isis> help cursor
>
> The lower-level pgplot cursor control function, _pgcurs, is
> also available.
>
> Thanks,
> -John
>
>
>
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