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figure option dialog does not properly handle units #4909

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merged 2 commits into from Sep 13, 2015

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jrevans
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@jrevans jrevans commented Aug 12, 2015

The figure option dialog resets the axes and all unit information. This saves the axes converter information so that it can be restored when the dialog values are applied to the figure.

This addresses an issue in #4897.

…is fixes

it so that unit information is not lost.
axes.xaxis.converter = xconverter
axes.yaxis.converter = yconverter
axes.xaxis.set_units( xunits )
axes.yaxis.set_units( yunits )
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PEP8: unnecessary spaces

@WeatherGod
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Travis is only complaining about the PEP8 errors I noted. The change makes sense.

At some point, I should update the editor to be mplot3d-friendly...

@@ -101,7 +107,7 @@ def figure_edit(axes, parent=None):
has_curve = bool(curves)

datalist = [(general, "Axes", "")]
if has_curve:
if has_curve and curves:
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What is the and curves doing?

@tacaswell
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What mechanism in that call back is re-setting the converters/units? That seems like the actually and this is just treating the symptoms.

@jrevans
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jrevans commented Aug 17, 2015

The spacing is now cleaned up as per your style rules. As for the root of the problem, when the apply callback happens it takes the values for the limits specified in the dialog (which do not have any unit information) and uses those to 'set_xlim' and 'set_ylim', which will set the units on the respective axis based on the values passed in. Since the limit values have become unitless in the GUI they stay unitless during the 'set_*' call and the axes forget what the units should be. This will preserve that unit information and make sure it stay in place after an apply is called.

As for the 'and curves', If you have a plot with a line, whose label is set to 'nolegend', then the logic fails as 'curves' is an empty list. I opted for the simplest fix of making sure that 'curves' was not empty after the preprocessing step (in the event the logic of the preprocessing step changes in the future).

@tacaswell
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I think the issue with an empty curve list was fixed in #4411 (originally reported as #4323). Can you please make sure that change is actually needed?

@tacaswell tacaswell added this to the next point release milestone Aug 18, 2015
@tacaswell tacaswell merged commit 6bd87db into matplotlib:master Sep 13, 2015
tacaswell added a commit that referenced this pull request Sep 13, 2015
FIX: Qt figure options preserve units
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3 participants