Re: [matplotlib-devel] ginput in nbagg backend to use in IPython Notebooks

[Thomas C. <tca...@gm...>]

nbagg is always running in the IPython event loop (as I understand it), so
I am not sure how to integrate that with the blocking.

On the 1.4.x/master branch we have support for (almost, one PR still
pending) all mouse and keyboard events so all of the mpl widgets should
work (big thanks to Steven Silvester).  T

What do you want to use that relies on ginput?

You can fake up a non-blocking version something like:

from collections import deque
```
class accumulator(object):
    def __init__(self, n=5):
        self.list_of_points = deque(maxlen=n)

    def on_event(self, event):
        self.list_of_points.append(event)

import matplotlib
import itertools
import numpy as np
matplotlib.use('nbagg')
import matplotlib.pyplot as plt
plt.close('all')
fig, ax = plt.subplots()
x = np.linspace(0,10,10000)
y = np.sin(x)
ln, = ax.plot(x,y)

dd = accumulator(15)
fig.canvas.mpl_connect('button_press_event', dd.on_event)
plt.show()
```

and then get the points by

```
dd.lest_of_points
```

This code obviously needs lots of bells and whistles, but points in the
right direction.

Tom

On Mon Jan 26 2015 at 2:45:45 PM Mark Bakker <ma...@gm...> wrote:

> Hello List,
>
> Are there any plans to make ginput work in the nbagg backend?
>
> It would be so cool if I could use that in an IPython Notebook together
> with the other widgets.
>
> Thanks,
>
> Mark
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