Re: [Plplot-devel] Other problems with -locate option on x01c

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

On Friday 01 March 2002 9:52 pm, Alan W. Irwin wrote:
> Joao's recent xwin fix only solved a tiny part of the problem.
>
> Using
>
> ./x01c -locate -dev xwin
>
> you can click on any viewport and get back world coordinates and relati=
ve
> device coordinates, but as soon as you make the mistake of clicking out=
side
> a viewport, the mouse is hosed, i.e. mouseclicks are ignored from then =
on.

This is the intended behavior. Also, if you invoke the cursor via the=20
driver, typing 'L' (no need for -locate in the cmdline), you finish it ei=
ther=20
typing <ESC> or clicking out a vieport.

> Since the xwin fix, the cross-hairs turn off when the mouse is hosed, b=
ut
> that is the only change in the bad behavior.
>
> With -dev tk you get identical bad results when clicking outside a
> viewport. However, if you stick inside viewports there is an extra twis=
t;
> you get two (!) sets of coordinates for every mouse click.

I can't reproduce this one.

>
> With -dev ntk you get identical bad results when clicking outside a
> viewport. However, if you stick inside viewports, you get the normal on=
e
> line of results per click, but no cross-hairs are displayed at all!

ntk does not yet uses crosshairs; instead it uses a cross cursor. It does=
 not=20
also implement the driver locate mode vie key 'L', nor resizes, nor...

>
> So there is a whole lot of little things which are not right as well as=
 the
> bigger problem of the mouse stopping working entirely if you ever click
> outside a viewport by mistake.

We can change this, but it works as designed. I agree that at first it se=
ems=20
strange, or even bad design, as one can leave locate mode inadvertly, but=
=20
there must exist a way to finish locate mode. Suggestions?

Joao

>
> Once the interactive drivers, the C library and C front-end start deali=
ng
> with interactive mouse clicks properly, I will want to get this working=
 for
> the python (or pyqt) front end as well. I have a research project on th=
e
> horizon involving the analysis of many spectra that requires good
> fundamental mouse interactivity for PLplot.
>
> Alan
>
> email: ir...@be...
> phone: 250-727-2902=09FAX: 250-721-7715
> snail-mail:
> Dr. Alan W. Irwin
> Department of Physics and Astronomy,
> University of Victoria, P.O. Box 3055,
> Victoria, British Columbia, Canada, V8W 3P6
> __________________________
>
> Linux-powered astrophysics
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