Add is_widget_backend() to the widget code path

[MridulS]

This should fix #589

I think InteractiveFigure is a bit misleading? Shouldn't this be something like WidgetFigure, as InteractiveFigure subclasses ipywidgets.

[doronbehar]

I tried this patch on NixOS with:

python -c 'import matplotlib.pyplot as plt; import scipp as sc; sc.arange("x", 5.0).plot(); plt.show()'

And it simply did nothing... I then tried:

python -c 'import matplotlib.pyplot as plt; import scipp as sc; print(sc.arange("x", 5.0).plot()); plt.show()'

Which printed:

<plopp.backends.matplotlib.figure.StaticFigure object at 0x78cce095af90>

Is this something I do wrong?

[nvaytet]

I think InteractiveFigure is a bit misleading? Shouldn't this be something like WidgetFigure, as InteractiveFigure subclasses ipywidgets.

I agree. By the same token, maybe StaticFigure is also a bad name? Because if you use the qt backend, it makes a StaticFigure but the figure isn't static at all. Should we call them WidgetFigure and ... something better? MplFigure?

[nvaytet]

Is this something I do wrong?

I usually did it via ipython, and using the fig.show() method instead of the plt.show(). Example in a ipython console:

import plopp as pp

f = pp.data.data1d().plot()
f.show()

works for me.

For the on-liner python -c, I think it makes the figure but closes it instantly so that I don't see it. Waiting for input at the end shows the figure:

python -c 'import scipp as sc; f = sc.arange("x", 5.0).plot(); f.show(); input()'

I am currently not sure why the matplotlib plt.show() does not work.

[doronbehar]

Example in a ipython console:

Doesn't work for me - I did created a Python file this time:

import scipp as sc
f = sc.arange("x", 5.0).plot()
f.show()

For the on-liner python -c, I think it makes the figure but closes it instantly so that I don't see it. Waiting for input at the end shows the figure:

Indeed! But this is very peculiar...

I am currently not sure why the matplotlib plt.show() does not work.

Yea for me too.