<div dir="ltr"><div><div><div><div><div><div><div><div>Hi!<br><br></div>I am an
astronomy teacher, and I'm preparing a program to analyze stellar
spectra with my pupils. It's going on well (I think!), but I have a
strange problem that I can't solve by myself.<br><br></div>The principal code is in "<span id="gmail-m_5549085128589638521:za.2">espectro</span>-visual.lisp"
("fits.lisp" is a kind of little 'library' to open fits image files, an
astronomical standard; you can visualize them with programs like "<span id="gmail-m_5549085128589638521:za.3">SaoImage</span> DS9"). You run the program with '(<span id="gmail-m_5549085128589638521:za.4">espectro</span>-visual)'. To reproduce the problem I think I'd better guide you step by step:<br><br></div>1) You click in 'Create profile..." and choose 'solar-spectrum.fit' (you can download this file (~1MB) from <a href="http://www.astro.cnba.uba.ar/solar-spectrum.fit">http://www.astro.cnba.uba.ar/solar-spectrum.fit</a>).<br></div>2)
Then you move over the profile, and -pressing the mouse right-button-
move a dozen or so pixels left or right and release the button: you'll
see a line and a number under the 'barycenter' of the zone
(astronomically, you should choose an spectral line (one of those
'valleys' here and there), but that doesn't matter now).<br></div>3) If
you press the mouse left-button over the number created, you can move it
around the canvas (I want to be able to do it, to avoid the
'cluttering' of labels).<br><br></div>Now, the problem: As soon as I
leave the canvas with the mouse, if I re-enter the canvas I'm no longer
able to move the labels again! I can do it with new labels, but if I
leave the canvas the problem applies to them too.<br><br></div>Thank you very much, and please excuse me if I didn't explain myself very well.<br><br></div><div>Luis López<span class="gmail-HOEnZb gmail-adL"><font color="#888888"><span id="gmail-m_5549085128589638521:za.5"></span></font></span></div></div>