On Sun, Jul 27, 2008 at 7:43 AM, Paul Kienzle <[EMAIL PROTECTED]> wrote:
> On Sat, Jul 26, 2008 at 7:26 PM, John Hunter <[EMAIL PROTECTED]> wrote:
>> But this example revealed a serious problem for wxagg -- the wx
>> backend save method was getting triggered. So wxagg couuld display an
>> image, but if we try to save it, it fails because backend_wx's
>> print_figure is getting called. I fixed this by reversing the order
>> of the inheritance in FigureCanvasWXAgg so that FigureCanvasAgg is
>> first. *please test*.
>
> That one is my fault. I was having trouble getting start_event_loop
> and draw_idle from Wx to trigger from WxAgg. I have no explanation
> why it works now with Agg before Wx --- Agg should pick up the default
> draw_idle from Base so WxAgg shouldn't try to look for it in Wx.
It doesn't appear to be working for me. To keep things simple, I am
working with backend_wx so there are no issues of diamond inheritance.
It just appears that the specialization is broken. I get this
endless loop when I try to run the demo -- I have some extra debug
prints inserted to see what is getting called. Eg when I start the
example, a window pops up with the "you will define a triangle" title,
and the following is printed to the console
home:~/mpl/examples/pylab_examples> python ginput_manual_clabel.py -dWX
You will define a triangle, click to begin
BlockingInput.__call__: calling canvas.start_event_loop
<matplotlib.backends.backend_wx.FigureCanvasWx; proxy of <Swig Object
of type 'wxPanel *' at 0xff091a0> >
FigureCanvasWx.start_event_loop
and then it waits for me. When I click just a single time on the axes
to select a point, before I can actually select the points for the
triangle, it enters the following loop and the console prints the
output
FigureCanvasWx.stop_event_loop
BlockingInput.__call__: finally
Select 3 corners with mouse
BlockingInput.__call__: calling canvas.start_event_loop
<matplotlib.backends.backend_wx.FigureCanvasWx; proxy of <Swig Object
of type 'wxPanel *' at 0xff091a0> >
FigureCanvasWx.start_event_loop
BlockingInput.__call__: finally
Too few points, starting over
Select 3 corners with mouse
BlockingInput.__call__: calling canvas.start_event_loop
<matplotlib.backends.backend_wx.FigureCanvasWx; proxy of <Swig Object
of type 'wxPanel *' at 0xff091a0> >
FigureCanvasWx.start_event_loop
BlockingInput.__call__: finally
Too few points, starting over
Select 3 corners with mouse
BlockingInput.__call__: calling canvas.start_event_loop
<matplotlib.backends.backend_wx.FigureCanvasWx; proxy of <Swig Object
of type 'wxPanel *' at 0xff091a0> >
FigureCanvasWx.start_event_loop
BlockingInput.__call__: finally
Too few points, starting over
Select 3 corners with mouse
BlockingInput.__call__: calling canvas.start_event_loop
<matplotlib.backends.backend_wx.FigureCanvasWx; proxy of <Swig Object
of type 'wxPanel *' at 0xff091a0> >
FigureCanvasWx.start_event_loop
FigureCanvasWx.stop_event_loop
BlockingInput.__call__: finally
and so on endlessly until I finally click 'x' to close the figure, I
get the following dead object error
raceback (most recent call last):
File "ginput_manual_clabel.py", line 40, in <module>
pts = np.asarray( plt.ginput(3,timeout=-1) )
File "/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/pyplot.py",
line 355, in ginput
return gcf().ginput(*args, **kwargs)
File "/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/figure.py",
line 1041, in ginput
show_clicks=show_clicks)
File
"/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/blocking_input.py",
line 239, in __call__
BlockingInput.__call__(self,n=n,timeout=timeout)
File
"/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/blocking_input.py",
line 109, in __call__
self.cleanup()
File
"/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/blocking_input.py",
line 226, in cleanup
self.fig.canvas.draw()
File
"//Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-unicode/wx/_core.py",
line 14029, in __getattr__
raise PyDeadObjectError(self.attrStr % self._name)
wx._core.PyDeadObjectError: The C++ part of the FigureCanvasWx object
has been deleted, attribute access no longer allowed.
On a separate note, I also see the strangeness you are seeing with the
multiple inheritance order. When I run the example with backend
wxagg, I get the wx specialization called even though FigureCanvasAgg
is defined first in the multiple inheritance heirarchy and so the base
method should be picked up. And yet when I try and replicate this in
test code, I always get the base class method ... Looks like we've
got some work to do to sort all of this out.
class Base:
def speak(self, timeout):
raise NotImplementedError
class Agg(Base):
pass
class Wx(Base):
def speak(self, timeout):
print 'wx'
class WXAgg(Agg,Wx):
pass
wxagg = WXAgg()
wxagg.speak(timeout=1)
Here is my version info -- running on os x leopard with
home:~/mpl/examples/pylab_examples> python simple_plot.py
--verbose-helpful -dWX$HOME=/Users/jdhunter
CONFIGDIR=/Users/jdhunter/.matplotlib
matplotlib data path
/Users/jdhunter/dev/lib/python2.5/site-packages/matplotlib/mpl-data
loaded rc file /Users/jdhunter/.matplotlib/matplotlibrc
matplotlib version 0.98.3rc1
verbose.level helpful
interactive is False
units is False
platform is darwin
Using fontManager instance from /Users/jdhunter/.matplotlib/fontManager.cache
backend WX version 2.8.3.0
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