On Tue, Feb 28, 2012 at 10:58 AM, John Hunter <jdh2...@gmail.com> wrote:
>
>
> On Tue, Feb 28, 2012 at 10:44 AM, Benjamin Root <ben.r...@ou.edu> wrote:
>
>>
>> The Lasso disconnects itself after the button_release event because
>> that's what indicates that you are done. The user gets back a single
>> Line2D object that is assumed to represent a single path with no breaks.
>> Reusing the Lasso widget would be a situation that would require a
>> different idiom for user interaction. I wouldn't be against a "MultiLasso"
>> widget that works differently from Lasso, but I really wouldn't want to
>> make changes to existing user widgets. It is iffy enough about whether to
>> remove the point-count-check.
>>
>>
> I added the point count check according to git blame and I don't remember
> why but I agree is doesn't look like it makes sense to me. I think this
> lasso is lightly used based on the volume of questions we get about it.
> One reason it may be lightly used is because it is hard to work with. If
> we can improve it, even changing functionality, I would be in favor. Eg,
> allowing the same Lasso to handle repeated selections makes sense to me.
> If the change looks too onerous, we could call it Lasso2 and deprecate the
> former.
>
I think that logic is slightly faulty. Another reason why we don't get a
lot of questions about it could be because it does (almost) exactly what
users want. Currently, I use the Lasso widget in my track_maker project to
select storm cells in a movie of radar images. Because I have multiple
modes to the program, a persistent Lasso object makes little sense. I also
want the Lasso's line to disappear after I am done selecting it so that I
can put in a polygon patch of my coloring and hatching.
I am skeptical of any redesign of Lasso. I am willing to see what others
have in mind, but I still think that it might better belong in a new class
"MultiLasso". I see no reason to deprecate the current Lasso (only to fix
it).
Cheers!
Ben Root
------------------------------------------------------------------------------
Keep Your Developer Skills Current with LearnDevNow!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-d2d
_______________________________________________
Matplotlib-devel mailing list
Matplotlib-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
