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Recompute Wedge path after change of attributes. #1635

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Merged
merged 1 commit into from
Jan 16, 2013
Merged

Recompute Wedge path after change of attributes. #1635

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39 changes: 32 additions & 7 deletions lib/matplotlib/patches.py
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Original file line number Diff line number Diff line change
Expand Up @@ -878,22 +878,26 @@ def __init__(self, center, r, theta1, theta2, width=None, **kwargs):
self.center = center
self.r, self.width = r, width
self.theta1, self.theta2 = theta1, theta2
self._patch_transform = transforms.IdentityTransform()
self._recompute_path()

def _recompute_path(self):
# Inner and outer rings are connected unless the annulus is complete
if abs((theta2 - theta1) - 360) <= 1e-12:
if abs((self.theta2 - self.theta1) - 360) <= 1e-12:
theta1, theta2 = 0, 360
connector = Path.MOVETO
else:
theta1, theta2 = self.theta1, self.theta2
connector = Path.LINETO

# Form the outer ring
arc = Path.arc(theta1, theta2)

if width is not None:
# Partial annulus needs to draw the outter ring
if self.width is not None:
# Partial annulus needs to draw the outer ring
# followed by a reversed and scaled inner ring
v1 = arc.vertices
v2 = arc.vertices[::-1] * float(r - width) / r
v2 = arc.vertices[::-1] * float(self.r - self.width) / self.r
v = np.vstack([v1, v2, v1[0, :], (0, 0)])
c = np.hstack([arc.codes, arc.codes, connector, Path.CLOSEPOLY])
c[len(arc.codes)] = connector
Expand All @@ -903,12 +907,33 @@ def __init__(self, center, r, theta1, theta2, width=None, **kwargs):
c = np.hstack([arc.codes, [connector, connector, Path.CLOSEPOLY]])

# Shift and scale the wedge to the final location.
v *= r
v += np.asarray(center)
v *= self.r
v += np.asarray(self.center)
self._path = Path(v, c)
self._patch_transform = transforms.IdentityTransform()

def set_center(self, center):
self._path = None
self.center = center

def set_radius(self, radius):
self._path = None
self.radius = radius

def set_theta1(self, theta1):
self._path = None
self.theta1 = theta1

def set_theta2(self, theta2):
self._path = None
self.theta2 = theta2

def set_width(self, width):
self._path = None
self.width = width

def get_path(self):
if self._path is None:
self._recompute_path()
return self._path


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