matplotlib-devel Mailing List for matplotlib

Howdy,
I stumbled upon these two projects which may be of interest to some in mpl land:
- perceptual image diff: http://pdiff.sourceforge.net/
I have no idea if this works well or not, but if it does, it could be
useful for regression testing of mpl, something which has been sorely
missing and normally involves running the test driver, looking for
errors and possibly inspecting plots by hand (or by eye, as it were).
 I think that mpl would greatly benefit from some form of automatic
testing.
- Graphite: http://graphite.wikidot.com/faq
Python based real-time graphs from large/high rate data sets. Every
now and then we get posts here asking about doing plots of high
throughput data, a task for which mpl isn't always ideally suited.
This might be a good alternative in some cases. I'm sure it doesn't
do any of the sophisticated/scientific plotting many of us need mpl
for, but for some use cases it may be a good tool.
cheers,
f

Hi,
I created a menu for selecting colormaps from a context menu on the
graph. The attached code cmapmenu.py contains a runnable example.
I've only implemented support for wx.
In general, I would like to be able to add context menu operations
to individual artists on the plot, and will be doing so for my
own applications. Is this something that could live in the
matplotlib backends? Are there users of Qt, Gtk, Tk, ... who
are willing to add support for them?
	- Paul

Hi,
Attached is a new patch to replace the previous one that I sent that
does what Gael suggested. It works well and seems fairly efficient to
me, but again I am new to python and I could be mistaken about what Gael
was suggesting. Basically, I created a base class that does the
blocking and collects events of any particular set of types specified by
name at initiation. I then created two subclasses that specify exactly
which events they deal with and do additional processing beyond just
collecting events, one for mouse events and one for mouse+keyboard
events. These are then called by ginput and waitforbuttonpress
respectively. I also changed my version of waitforbuttonpress so that
it precisely matches the functionality of matlab's waitforbuttonpress,
with the exception of a timeout option.
Comments welcome. 
Cheers,
David
On Fri, 2008年07月11日 at 16:12 +0200, Gael Varoquaux wrote:
> On Fri, Jul 11, 2008 at 03:22:30PM +0200, David M. Kaplan wrote:
> > The way I have implemented it is by adding an additional class
> > BlockingKeyMouseInput, which is quite similar to BlockingMouseInput, but
> > waits for both key and mouse events. A smarter person than I could
> > probably combine these two classes and make something that would serve
> > both functions. But I am basically new to python and don't feel
> > comfortable. Perhaps someone else could take a look and make
> > improvements/simplifications?
> 
> The only significantly different lines are the two lines where an
> mplconnect is done to register the callback. You could abstract this in a
> method and then have a base class and two sub classes for each call: the
> blocking from mouse and the blocking from button.
> 
> > The other thing that I have noticed with both ginput and
> > waitforbuttonpress is that if you use ctrl-c to break out of either,
> > then the callback functions remain attached to their respective events
> > (e.g., try ginput(n=-1,timeout=-1,verbose=True) and hit ctrl-c). This
> > probably isn't a huge problem, but it would be nice if there was a way
> > to say "if ctrl-c is pressed, cleanup nicely". Does someone know if
> > that is possible?
> 
> I think this is a good usecase for a try: ... finally: ... .
> 
> I don't have time to do these changes right now, as I am very busy both
> with IPython and Mayavi, and will be travelling next two weeks, but you
> can have a good at them, and someone else will probably commit your
> patch, if you removed the code duplication.
> 
> Cheers,
> 
> Gaël
> 
-- 
**********************************
David M. Kaplan
Assistant Researcher
UCSC / Institute of Marine Sciences
Ocean Sciences
1156 High St.
SC, CA 95064
Phone: 831-459-4789
Fax: 831-459-4882
http://pmc.ucsc.edu/~dmk/
**********************************

On Fri, Jul 11, 2008 at 03:22:30PM +0200, David M. Kaplan wrote:
> The way I have implemented it is by adding an additional class
> BlockingKeyMouseInput, which is quite similar to BlockingMouseInput, but
> waits for both key and mouse events. A smarter person than I could
> probably combine these two classes and make something that would serve
> both functions. But I am basically new to python and don't feel
> comfortable. Perhaps someone else could take a look and make
> improvements/simplifications?
The only significantly different lines are the two lines where an
mplconnect is done to register the callback. You could abstract this in a
method and then have a base class and two sub classes for each call: the
blocking from mouse and the blocking from button.
> The other thing that I have noticed with both ginput and
> waitforbuttonpress is that if you use ctrl-c to break out of either,
> then the callback functions remain attached to their respective events
> (e.g., try ginput(n=-1,timeout=-1,verbose=True) and hit ctrl-c). This
> probably isn't a huge problem, but it would be nice if there was a way
> to say "if ctrl-c is pressed, cleanup nicely". Does someone know if
> that is possible?
I think this is a good usecase for a try: ... finally: ... .
I don't have time to do these changes right now, as I am very busy both
with IPython and Mayavi, and will be travelling next two weeks, but you
can have a good at them, and someone else will probably commit your
patch, if you removed the code duplication.
Cheers,
Gaël

Hi,
Following Gael Varoquaux's lead on adding a ginput command to matplotlib
(nice job!), I added a waitforbuttonpress function to matplotlib. The
patch is attached (generate using svn diff from the
matplotlib/trunk/matplotlib directory). waitforbuttonpress is a simple
function with a matlab equivalent that returns a list of true/false's -
true for a keyboard click and false for a mouse click. I use it in
matlab regularly as a simple yes/no question (often to decide whether or
not to save a figure). 
The way I have implemented it is by adding an additional class
BlockingKeyMouseInput, which is quite similar to BlockingMouseInput, but
waits for both key and mouse events. A smarter person than I could
probably combine these two classes and make something that would serve
both functions. But I am basically new to python and don't feel
comfortable. Perhaps someone else could take a look and make
improvements/simplifications?
The other thing that I have noticed with both ginput and
waitforbuttonpress is that if you use ctrl-c to break out of either,
then the callback functions remain attached to their respective events
(e.g., try ginput(n=-1,timeout=-1,verbose=True) and hit ctrl-c). This
probably isn't a huge problem, but it would be nice if there was a way
to say "if ctrl-c is pressed, cleanup nicely". Does someone know if
that is possible?
Cheers,
David
-- 
**********************************
David M. Kaplan
Charge de Recherche 1
Institut de Recherche pour le Developpement
Centre de Recherche Halieutique Mediterraneenne et Tropicale
av. Jean Monnet
B.P. 171
34203 Sete cedex
France
Phone: +33 (0)4 99 57 32 27
Fax: +33 (0)4 99 57 32 95
http://www.ur097.ird.fr/team/dkaplan/index.html
**********************************
-- 
**********************************
David M. Kaplan
Assistant Researcher
UCSC / Institute of Marine Sciences
Ocean Sciences
1156 High St.
SC, CA 95064
Phone: 831-459-4789
Fax: 831-459-4882
http://pmc.ucsc.edu/~dmk/
**********************************