def scanner(s):
"""
Split a string into mathtext and non-mathtext parts. mathtext is
surrounded by $ symbols. quoted \$ are ignored
All slash quotes dollar signs are ignored
The number of unquoted dollar signs must be even
Return value is a list of (substring, inmath) tuples
"""
if not len(s): return [(s, False)]
#print 'testing', s, type(s)
inddollar = nonzero(asarray(equal(s, '$')))
quoted = dict([(ind, 1) for ind in nonzero(asarray(equal(s, '\\')))])
indkeep = [ind for ind in inddollar if not quoted.has_key(ind - 1)]
if len(indkeep) == 0:
return [(s, False)]
if len(indkeep) % 2:
raise ValueError(
'Illegal string "%s" (must have balanced dollar signs)' % s)
Ns = len(s)
indkeep = [ind for ind in indkeep]
# make sure we start with the first element
if indkeep[0] != 0: indkeep.insert(0, 0)
# and end with one past the end of the string
indkeep.append(Ns + 1)
Nkeep = len(indkeep)
results = []
inmath = s[0] == '$'
for i in range(Nkeep - 1):
i0, i1 = indkeep[i], indkeep[i + 1]
if not inmath:
if i0 > 0: i0 += 1
else:
i1 += 1
if i0 >= Ns: break
results.append((s[i0:i1], inmath))
inmath = not inmath
return results
def scanner(s):
"""
Split a string into mathtext and non-mathtext parts. mathtext is
surrounded by $ symbols. quoted \$ are ignored
All slash quotes dollar signs are ignored
The number of unquoted dollar signs must be even
Return value is a list of (substring, inmath) tuples
"""
if not len(s): return [(s, False)]
#print 'testing', s, type(s)
inddollar = nonzero(asarray(equal(s,'$')))
quoted = dict([ (ind,1) for ind in nonzero(asarray(equal(s,'\\')))])
indkeep = [ind for ind in inddollar if not quoted.has_key(ind-1)]
if len(indkeep)==0:
return [(s, False)]
if len(indkeep)%2:
raise ValueError('Illegal string "%s" (must have balanced dollar signs)'%s)
Ns = len(s)
indkeep = [ind for ind in indkeep]
# make sure we start with the first element
if indkeep[0]!=0: indkeep.insert(0,0)
# and end with one past the end of the string
indkeep.append(Ns+1)
Nkeep = len(indkeep)
results = []
inmath = s[0] == '$'
for i in range(Nkeep-1):
i0, i1 = indkeep[i], indkeep[i+1]
if not inmath:
if i0>0: i0 +=1
else:
i1 += 1
if i0>=Ns: break
results.append((s[i0:i1], inmath))
inmath = not inmath
return results
def get_ind_under_point(self, event):
'get the index of the vertex under point if within epsilon tolerance'
x, y = zip(*self.poly.verts)
# display coords
xt, yt = self.poly.get_transform().numerix_x_y(x, y)
d = sqrt((xt - event.x)**2 + (yt - event.y)**2)
indseq = nonzero(equal(d, amin(d)))
ind = indseq[0]
if d[ind] >= self.epsilon:
ind = None
return ind
def get_ind_under_point(self, event):
'get the index of the vertex under point if within epsilon tolerance'
x, y = zip(*self.poly.verts)
# display coords
xt, yt = self.poly.get_transform().numerix_x_y(x, y)
d = sqrt((xt-event.x)**2 + (yt-event.y)**2)
indseq = nonzero(equal(d, amin(d)))
ind = indseq[0]
if d[ind]>=self.epsilon:
ind = None
return ind
