| 1 |
# |
| 2 |
# Handler for processing dimensioned value inputs |
| 3 |
# |
| 4 |
|
| 5 |
import re |
| 6 |
import ascend |
| 7 |
|
| 8 |
# RE for units matching |
| 9 |
UNITS_RE = re.compile("([-+]?(\d+(\.\d*)?|\d*\.d+)([eE][-+]?\d+)?)\s*(.*)"); |
| 10 |
|
| 11 |
class InputError(Exception): |
| 12 |
def __init__(self,msg): |
| 13 |
self.msg = msg; |
| 14 |
def __str__(self): |
| 15 |
return "Input Error: %s" % self.msg; |
| 16 |
|
| 17 |
class RealAtomEntry: |
| 18 |
def __init__(self,instance,newtext): |
| 19 |
self.instance = instance; |
| 20 |
self.newtext = newtext; |
| 21 |
self.units = None; # the string value of the entered units |
| 22 |
self.value = None; |
| 23 |
|
| 24 |
def checkEntry(self): |
| 25 |
_instdim = self.instance.getDimensions(); |
| 26 |
_insttype = self.instance.getType() |
| 27 |
|
| 28 |
try: |
| 29 |
# match a float with option text afterwards, optionally separated by whitespace |
| 30 |
_match = re.match(UNITS_RE,self.newtext) |
| 31 |
if not _match: |
| 32 |
raise InputError("Not a valid value-and-optional-units") |
| 33 |
|
| 34 |
_val = _match.group(1) # the numerical part of the input |
| 35 |
self.units = _match.group(5) # the text entered for units |
| 36 |
#_val, _units = re.split("[ \t]+",newtext,2); |
| 37 |
except RuntimeError: |
| 38 |
raise InputError("Unable to split value and units") |
| 39 |
|
| 40 |
print "val = ",_val |
| 41 |
print "units = ",self.units |
| 42 |
|
| 43 |
# parse the units, throw an error if no good |
| 44 |
try: |
| 45 |
_val = float(_val) |
| 46 |
except RuntimeError: |
| 47 |
raise InputError("Unable to convert number part '%s' to float" % _val) |
| 48 |
|
| 49 |
# check the units |
| 50 |
if self.units.strip() == "": |
| 51 |
# if no units entered, assume the 'preferred' units |
| 52 |
_u = _insttype.getPreferredUnits() |
| 53 |
if _u == None: |
| 54 |
# no preferred units for this type, so assume default units |
| 55 |
_u = _instdim.getDefaultUnits() |
| 56 |
print "Assuming units '%s'" % _u.getName().toString() |
| 57 |
else: |
| 58 |
try: |
| 59 |
_u = ascend.Units(self.units) |
| 60 |
print "Parsed units '%s'" % self.units |
| 61 |
except RuntimeError: |
| 62 |
raise InputError("Unrecognisable units '%s'" % self.units) |
| 63 |
|
| 64 |
if _instdim != _u.getDimensions(): |
| 65 |
|
| 66 |
if _u.getDimensions().isDimensionless(): |
| 67 |
self.units = "[dimensionless]" |
| 68 |
|
| 69 |
_my_dims = _instdim.getDefaultUnits() |
| 70 |
if _instdim.isDimensionless(): |
| 71 |
_my_dims = "[dimensionless]" |
| 72 |
|
| 73 |
raise InputError("Incompatible units '%s' (must fit with '%s')" |
| 74 |
% (self.units, _my_dims.getName().toString()) ) |
| 75 |
|
| 76 |
_conv = float(_u.getConversion()) |
| 77 |
# self.reporter.reportNote("Converting: multiplying '%s %s' by factor %s to get SI units" % (_val, _units, _conv) ) |
| 78 |
self.value = _val * _conv; |
| 79 |
|
| 80 |
print "Setting '%s' to '%f'" % (self.instance.getName().toString(), self.value) |
| 81 |
|
| 82 |
def setValue(self): |
| 83 |
if self.instance.getType().isRefinedSolverVar(): |
| 84 |
# for solver vars, set the 'fixed' flag as well |
| 85 |
self.instance.setFixedValue(self.value) |
| 86 |
else: |
| 87 |
self.instance.setRealValue(self.value) |
| 88 |
|
| 89 |
def getValue(self): |
| 90 |
return self.value |
| 91 |
|
| 92 |
def exportPreferredUnits(self,prefs): |
| 93 |
_typename = str( self.instance.getType().getName() ) |
| 94 |
_dim = self.instance.getDimensions() |
| 95 |
|
| 96 |
if self.units.strip() != "" and not _dim.isDimensionless(): |
| 97 |
prefs.setPreferredUnits(_typename,_units); |
| 98 |
|
| 99 |
|
Parent Directory
| 
Revision Log