[IPython-dev] Text output from matplotlib event not shown

[Antonino Ingargiola]

Thanks!

Antonio


On Fri, Apr 18, 2014 at 11:34 AM, MinRK <benjaminrk at gmail.com> wrote:

> There's definitely a chance for fixing this in 2.x. I'll try to work on it
> this week.
>
>
> On Fri, Apr 18, 2014 at 11:22 AM, Antonino Ingargiola <tritemio at gmail.com>wrote:
>
>> Unfortunately I have distributed several notebooks that, due to this
>> regression, don't work anymore once the user upgrade to 2.0.
>>
>> Any hope this can be fixed in a 2.x release?
>>
>> Or, is there is any workaround that does not involve modifying the
>> notebook code? The plot function is loaded from a python file, I can change
>> this but I would rather not change the notebook? In principle I could
>> adding something like get_range() in the notebook for each range selection,
>> but this would spoil the purpose of an interactive range selection.
>>
>> Thanks,
>> Antonio
>>
>>
>> On Fri, Apr 18, 2014 at 10:32 AM, MinRK <benjaminrk at gmail.com> wrote:
>>
>>> This is open as a GitHub Issue<https://github.com/ipython/ipython/issues/5407>.
>>> As a result of cleaning up data structures when we think we are done, async
>>> output is lost.
>>>
>>> -MinRK
>>>
>>>
>>> On Thu, Apr 17, 2014 at 11:56 PM, Antonino Ingargiola <
>>> tritemio at gmail.com> wrote:
>>>
>>>> For the record, I tried running the plot from a qtconsole and the text
>>>> output is correctly printed. So it is a notebook specific issue.
>>>>
>>>> Antonio
>>>>
>>>>
>>>> On Thu, Apr 17, 2014 at 10:57 PM, Antonino Ingargiola <
>>>> tritemio at gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> in IPython Notebook 1.x I built some QT matplotlib plots that allow to
>>>>> select a range (with the mouse) and print to the range boundaries, or
>>>>> related information.
>>>>>
>>>>>  To do that I connect a callback to the standard matplotlib events.
>>>>> The callback draws a range highlight and prints the range info.
>>>>>
>>>>> In IPython 2.0 I can't get the print output anymore, although the
>>>>> range is drawn and therefore I'm sure the callback is called. I thought
>>>>> that the issue can be related to:
>>>>>
>>>>> https://github.com/ipython/ipython/issues/5408
>>>>>
>>>>> If this is the same issue, are they any workaround I can use to get
>>>>> the output back?
>>>>>
>>>>> For completeness I attach the main class I use for the interactive
>>>>> range selection:
>>>>>
>>>>> class GuiSelection(object):
>>>>>     """Abstract class for range selection.
>>>>>
>>>>>     Methods on_press_draw(), on_motion_draw() and on_release_print()
>>>>> must
>>>>>     be overloaded by children classes.
>>>>>     """
>>>>>     def __init__(self, fig, ax, debug=False):
>>>>>         self.ax = ax
>>>>>         self.fig = fig
>>>>>         self.pressed = False
>>>>>         self.debug = debug
>>>>>         self.id_press = fig.canvas.mpl_connect('button_press_event',
>>>>>                                                 self.on_press)
>>>>>         if self.debug:
>>>>>             print 'Figure:', fig, '\nAxis:', ax
>>>>>     def on_press(self, event):
>>>>>         if event.inaxes != self.ax: return
>>>>>         self.pressed = True
>>>>>         self.xs, self.ys = event.xdata, event.ydata
>>>>>         if self.debug:
>>>>>             pprint('PRESS button=%d, x=%d, y=%d, xdata=%f, ydata=%f\n'
>>>>> % (
>>>>>                 event.button, event.x, event.y, event.xdata,
>>>>> event.ydata))
>>>>>         self.on_press_draw()
>>>>>         self.fig.canvas.draw()
>>>>>         self.id_motion =
>>>>> self.fig.canvas.mpl_connect('motion_notify_event',
>>>>>                                                      self.on_motion)
>>>>>         self.fig.canvas.mpl_connect('button_release_event',
>>>>>                                              self.on_release)
>>>>>
>>>>>     def on_motion(self, event):
>>>>>         if event.inaxes != self.ax: return
>>>>>         if self.debug:
>>>>>             pprint('MOTION x=%d, y=%d, xdata=%f, ydata=%f\n' % (
>>>>>                 event.x, event.y, event.xdata, event.ydata))
>>>>>         self.xe, self.ye = event.xdata, event.ydata
>>>>>         self.on_motion_draw()
>>>>>         self.fig.canvas.draw()
>>>>>
>>>>>     def on_release(self, event):
>>>>>         if not self.pressed: return
>>>>>         self.pressed = False
>>>>>         if self.debug:
>>>>>             pprint('RELEASE button=%d, x=%d, y=%d, xdata=%f,
>>>>> ydata=%f\n' % (
>>>>>                 event.button, event.x, event.y, event.xdata,
>>>>> event.ydata))
>>>>>         self.fig.canvas.mpl_disconnect(self.id_motion)
>>>>>         self.on_release_print()
>>>>>
>>>>>     def on_press_draw(self):
>>>>>         pass
>>>>>
>>>>>     def on_motion_draw(self):
>>>>>         pass
>>>>>
>>>>>     def on_release_print(self):
>>>>>         pass
>>>>>
>>>>>
>>>>
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