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

[Alan W. I. <ir...@be...>]

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 relative
device coordinates, but as soon as you make the mistake of clicking outside
a viewport, the mouse is hosed, i.e. mouseclicks are ignored from then on.
Since the xwin fix, the cross-hairs turn off when the mouse is hosed, but
that is the only change in the bad behaviour.

With -dev tk you get identical bad results when clicking outside a viewport.
However, if you stick inside viewports there is an extra twist; you get two
(!) sets of coordinates for every mouse click.

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

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.

Once the interactive drivers, the C library and C front-end start dealing
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 the
horizon involving the analysis of many spectra that requires good
fundamental mouse interactivity for PLplot.

Alan

email: ir...@be...
phone: 250-727-2902	FAX: 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
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