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Fix containment and subslice optim. for steps. #6645

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Jul 12, 2016
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Fix containment and subslice optim. for steps. #6645

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13b4555
Fix containment and subslice optim. for steps.
anntzer Jun 26, 2016
e7dd0e3
Adapt drawstyles test.
anntzer Jun 29, 2016
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Fix containment and subslice optim. for steps. 
 #6497 set the `_path` attribute of Line2D to the actually drawn path
even if the drawstyle is `steps-*`; however containment tests and the
subslice optimization for very long paths were not updated accordingly
(see #6615).  This patch fixes the issues.

Note that `contains` returns, for events in a horizontal segment of a
"steps-mid" drawstyle plot, the index of the point in the segment,
regardless of whether the event occured to the left or the right of
that point.
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@anntzer
anntzer committed Jun 26, 2016
commit 13b45558fac6fdf537924ba520caabf1cac1b1ae
10 changes: 7 additions & 3 deletions lib/matplotlib/lines.py
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Original file line number Diff line number Diff line change
Expand Up @@ -479,6 +479,8 @@ def contains(self, mouseevent):
else:
# If line, return the nearby segment(s)
ind = segment_hits(mouseevent.x, mouseevent.y, xt, yt, pixels)
if self._drawstyle.startswith("steps"):
ind //= 2

ind += self.ind_offset

Expand Down Expand Up @@ -680,7 +682,8 @@ def recache(self, always=False):
else:
interpolation_steps = 1
xy = STEP_LOOKUP_MAP[self._drawstyle](*self._xy.T)
self._path = Path(np.asarray(xy).T, None, interpolation_steps)
self._path = Path(np.asarray(xy).T,
_interpolation_steps=interpolation_steps)
self._transformed_path = None
self._invalidx = False
self._invalidy = False
Expand All @@ -693,8 +696,9 @@ def _transform_path(self, subslice=None):
"""
# Masked arrays are now handled by the Path class itself
if subslice is not None:
_steps = self._path._interpolation_steps
_path = Path(self._xy[subslice, :], _interpolation_steps=_steps)
xy = STEP_LOOKUP_MAP[self._drawstyle](*self._xy[subslice, :].T)
_path = Path(np.asarray(xy).T,
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Can you add a test image for this?

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done

_interpolation_steps=self._path._interpolation_steps)
else:
_path = self._path
self._transformed_path = TransformedPath(_path, self.get_transform())
Expand Down