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"""
This python module provides functionality to parse the methods of a
VTK object.
Created by Prabhu Ramachandran. Committed in Apr, 2002.
"""
import string, re, sys
import types
# set this to 1 if you want to see debugging messages - very useful if
# you have problems
DEBUG=0
def debug(msg):
if DEBUG:
print(msg)
class VtkDirMethodParser:
"""Parses the methods from dir(vtk_obj)."""
def initialize_methods(self, vtk_obj):
debug("VtkDirMethodParser:: initialize_methods()")
self.methods = dir(vtk_obj)[:]
# stores the <blah>On methods
self.toggle_meths = []
# stores the Set<blah>To<blah> methods
self.state_meths = []
# stores the methods that have a Get<blah> and Set<blah>
# only the <blah> is stored
self.get_set_meths = []
# pure get methods
self.get_meths = []
self.state_patn = re.compile("To[A-Z0-9]")
def parse_methods(self, vtk_obj):
debug("VtkDirMethodParser:: parse_methods()")
self.initialize_methods(vtk_obj)
debug("VtkDirMethodParser:: parse_methods() - initialized methods")
for method in self.methods[:]:
# finding all the methods that set the state.
if method[:3].find("Set") >= 0 and \
self.state_patn.search(method) is not None:
try:
eval("vtk_obj.Get%s" % method[3:])
except AttributeError:
self.state_meths.append(method)
self.methods.remove(method)
# finding all the On/Off toggle methods
elif method[-2:].find("On") >= 0:
try:
self.methods.index("%sOff" % method[:-2])
except ValueError:
pass
else:
self.toggle_meths.append(method)
self.methods.remove(method)
self.methods.remove("%sOff" % method[:-2])
# finding the Get/Set methods.
elif method[:3].find("Get") == 0:
set_m = "Set" + method[3:]
try:
self.methods.index(set_m)
except ValueError:
pass
else:
self.get_set_meths.append(method[3:])
self.methods.remove(method)
self.methods.remove(set_m)
self.clean_up_methods(vtk_obj)
def clean_up_methods(self, vtk_obj):
self.clean_get_set(vtk_obj)
self.clean_state_methods(vtk_obj)
self.clean_get_methods(vtk_obj)
def clean_get_set(self, vtk_obj):
debug("VtkDirMethodParser:: clean_get_set()")
# cleaning up the Get/Set methods by removing the toggle funcs.
for method in self.toggle_meths:
try:
self.get_set_meths.remove(method[:-2])
except ValueError:
pass
# cleaning them up by removing any methods that are responsible for
# other vtkObjects
for method in self.get_set_meths[:]:
try:
eval("vtk_obj.Get%s().GetClassName()" % method)
except (TypeError, AttributeError):
pass
else:
self.get_set_meths.remove(method)
continue
try:
val = eval("vtk_obj.Get%s()" % method)
except (TypeError, AttributeError):
self.get_set_meths.remove(method)
else:
if val is None:
self.get_set_meths.remove(method)
def clean_state_methods(self, vtk_obj):
debug("VtkDirMethodParser:: clean_state_methods()")
# Getting the remaining pure GetMethods
for method in self.methods[:]:
if method[:3].find("Get") == 0:
self.get_meths.append(method)
self.methods.remove(method)
# Grouping similar state methods
if len(self.state_meths) != 0:
tmp = self.state_meths[:]
self.state_meths = []
state_group = [tmp[0]]
end = self.state_patn.search(tmp[0]).start()
# stores the method type common to all similar methods
m = tmp[0][3:end]
for i in range(1, len(tmp)):
if tmp[i].find(m) >= 0:
state_group.append(tmp[i])
else:
self.state_meths.append(state_group)
state_group = [tmp[i]]
end = self.state_patn.search(tmp[i]).start()
m = tmp[i][3:end]
try: # remove the corresponding set method in get_set
val = self.get_set_meths.index(m)
except ValueError:
pass
else:
del self.get_set_meths[val]
#self.get_meths.append("Get" + m)
clamp_m = "Get" + m + "MinValue"
try: # remove the GetNameMax/MinValue in get_meths
val = self.get_meths.index(clamp_m)
except ValueError:
pass
else:
del self.get_meths[val]
val = self.get_meths.index("Get" + m + "MaxValue")
del self.get_meths[val]
if len(state_group) > 0:
self.state_meths.append(state_group)
def clean_get_methods(self, vtk_obj):
debug("VtkDirMethodParser:: clean_get_methods()")
for method in self.get_meths[:]:
debug(method)
try:
res = eval("vtk_obj.%s()" % method)
except (TypeError, AttributeError):
self.get_meths.remove(method)
continue
else:
try:
eval("vtk_obj.%s().GetClassName()" % method)
except AttributeError:
pass
else:
self.get_meths.remove(method)
continue
if method[-8:].find("MaxValue") > -1:
self.get_meths.remove(method)
elif method[-8:].find("MinValue") > -1:
self.get_meths.remove(method)
self.get_meths.sort()
def toggle_methods(self):
return self.toggle_meths
def state_methods(self):
return self.state_meths
def get_set_methods(self):
return self.get_set_meths
def get_methods(self):
return self.get_meths
class VtkPrintMethodParser:
"""This class finds the methods for a given vtkObject. It uses
the output from vtkObject->Print() (or in Python str(vtkObject))
and output from the VtkDirMethodParser to obtain the methods."""
def parse_methods(self, vtk_obj):
"""Parse for the methods."""
debug("VtkPrintMethodParser:: parse_methods()")
self._initialize_methods(vtk_obj)
def _get_str_obj(self, vtk_obj):
debug("VtkPrintMethodParser:: _get_str_obj()")
self.methods = str(vtk_obj)
self.methods = self.methods.split("\n")
del self.methods[0]
def _initialize_methods(self, vtk_obj):
"""Do the basic parsing and setting up"""
debug("VtkPrintMethodParser:: _initialize_methods()")
dir_p = VtkDirMethodParser()
dir_p.parse_methods(vtk_obj)
self.toggle_meths = dir_p.toggle_methods()
self.state_meths = dir_p.state_methods()
self.get_set_meths = dir_p.get_set_methods()
self.get_meths = dir_p.get_methods()
def toggle_methods(self):
return self.toggle_meths
def state_methods(self):
return self.state_meths
def get_set_methods(self):
return self.get_set_meths
def get_methods(self):
return self.get_meths
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