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<TITLE>PmwEntryField.py</TITLE>
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<FONT COLOR="#DD0000"># Based on iwidgets2.2.0/entryfield.itk code.</FONT>
import regex
import types
import Tkinter
import Pmw
<FONT COLOR="#DD0000"># Entry field validation functions</FONT>
<STRONG>def _numeric</STRONG>(text):
if text == <FONT COLOR="#009900">''</FONT>:
return -1
else:
return _getRegex(<FONT COLOR="#009900">'^[0-9]*$'</FONT>).match(text) != -1
<STRONG>def _integer</STRONG>(text):
if text in (<FONT COLOR="#009900">''</FONT>, <FONT COLOR="#009900">'-'</FONT>, <FONT COLOR="#009900">'+'</FONT>):
return -1
else:
return _getRegex(<FONT COLOR="#009900">'^[-+]?\([0-9]*\)$'</FONT>).match(text) != -1
<STRONG>def _alphabetic</STRONG>(text):
return _getRegex(<FONT COLOR="#009900">'^[a-z]*$'</FONT>, 1).match(text) != -1
<STRONG>def _alphanumeric</STRONG>(text):
return _getRegex(<FONT COLOR="#009900">'^[0-9a-z]*$'</FONT>, 1).match(text) != -1
<STRONG>def _hexadecimal</STRONG>(text):
if text in (<FONT COLOR="#009900">''</FONT>, <FONT COLOR="#009900">'0x'</FONT>, <FONT COLOR="#009900">'0X'</FONT>):
return -1
else:
return _getRegex(<FONT COLOR="#009900">'^\(0x\)?\([0-9a-f]*\)$'</FONT>, 1).match(text) != -1
<STRONG>def _real</STRONG>(text):
if text in (<FONT COLOR="#009900">''</FONT>, <FONT COLOR="#009900">'-'</FONT>, <FONT COLOR="#009900">'+'</FONT>, <FONT COLOR="#009900">'.'</FONT>, <FONT COLOR="#009900">'-.'</FONT>, <FONT COLOR="#009900">'+.'</FONT>,):
return -1
elif _getRegex(<FONT COLOR="#009900">'^[^e]*[0-9]'</FONT>).search(text) == -1:
return 0
else:
return _getRegex(
<FONT COLOR="#009900">'^[-+]?[0-9]*\.?[0-9]*\([eE][-+]?[0-9]*\)?$'</FONT>).match(text) != -1
_from0to23 = <FONT COLOR="#009900">'\([0-9]\|[0-1][0-9]\|2[0-3]\)'</FONT>
_from0to60 = <FONT COLOR="#009900">'\([0-9]\|[0-5][0-9]\)'</FONT>
_time24Reg = <FONT COLOR="#009900">'^'</FONT> + _from0to23 + <FONT COLOR="#009900">':'</FONT> + _from0to60 + <FONT COLOR="#009900">':'</FONT> + _from0to60 + <FONT COLOR="#009900">'$'</FONT>
<STRONG>def _time24</STRONG>(text):
if _getRegex(_time24Reg).match(text) != -1:
return 1
else:
return -1
_timeNReg = <FONT COLOR="#009900">'^[-+]?[0-9]+:'</FONT> + _from0to60 + <FONT COLOR="#009900">':'</FONT> + _from0to60 + <FONT COLOR="#009900">'$'</FONT>
<STRONG>def _timeN</STRONG>(text):
if _getRegex(_timeNReg).match(text) != -1:
return 1
else:
return -1
_from1to31 = <FONT COLOR="#009900">'\(0?[1-9]\|[1-2][0-9]\|3[01]\)'</FONT>
_from1to12 = <FONT COLOR="#009900">'\(0?[1-9]\|1[0-2]\)'</FONT>
_digits = <FONT COLOR="#009900">'[0-9]+'</FONT>
_date_dmyReg = <FONT COLOR="#009900">'^'</FONT> + _from1to31 + <FONT COLOR="#009900">'/'</FONT> + _from1to12 + <FONT COLOR="#009900">'/'</FONT> + _digits + <FONT COLOR="#009900">'$'</FONT>
_date_mdyReg = <FONT COLOR="#009900">'^'</FONT> + _from1to12 + <FONT COLOR="#009900">'/'</FONT> + _from1to31 + <FONT COLOR="#009900">'/'</FONT> + _digits + <FONT COLOR="#009900">'$'</FONT>
_date_ymdReg = <FONT COLOR="#009900">'^'</FONT> + _digits + <FONT COLOR="#009900">'/'</FONT> + _from1to12 + <FONT COLOR="#009900">'/'</FONT> + _from1to31 + <FONT COLOR="#009900">'$'</FONT>
<STRONG>def _date_dmy</STRONG>(text):
if _getRegex(_date_dmyReg).match(text) != -1:
return 1
else:
return -1
<STRONG>def _date_mdy</STRONG>(text):
if _getRegex(_date_mdyReg).match(text) != -1:
return 1
else:
return -1
<STRONG>def _date_ymd</STRONG>(text):
if _getRegex(_date_ymdReg).match(text) != -1:
return 1
else:
return -1
_validators = {
<FONT COLOR="#009900">'numeric'</FONT> : _numeric, # integer >= 0
<FONT COLOR="#009900">'integer'</FONT> : _integer, # any integer
<FONT COLOR="#009900">'hexadecimal'</FONT> : _hexadecimal, # hex number (optionally with leading 0x)
<FONT COLOR="#009900">'real'</FONT> : _real, # number with or without a decimal point
<FONT COLOR="#009900">'alphabetic'</FONT> : _alphabetic, # letters a-zA-Z
<FONT COLOR="#009900">'alphanumeric'</FONT> : _alphanumeric, # letters a-zA-Z and digits
<FONT COLOR="#009900">'timeN'</FONT> : _timeN, # HH:MM:SS
<FONT COLOR="#009900">'time24'</FONT> : _time24, # HH:MM:SS (between 00:00:00 and 23:59:59)
<FONT COLOR="#009900">'date_dmy'</FONT> : _date_dmy, # DD/MM/YY
<FONT COLOR="#009900">'date_mdy'</FONT> : _date_mdy, # MM/DD/YY
<FONT COLOR="#009900">'date_ymd'</FONT> : _date_ymd, # YY/MM/DD
}
_regexCache = {}
<STRONG>def _getRegex</STRONG>(pattern, ignoreCase = 0):
global _regexCache
item = pattern, ignoreCase
if not _regexCache.has_key(item):
if ignoreCase:
_regexCache[item] = regex.compile(pattern, regex.casefold)
else:
_regexCache[item] = regex.compile(pattern)
return _regexCache[item]
_entryCache = {}
<STRONG>def _registerEntryField</STRONG>(entry, entryField):
<FONT COLOR="#DD0000"># Register an EntryField widget for an Entry widget</FONT>
_entryCache[entry] = entryField
<STRONG>def _preProcess</STRONG>(event, *args):
<FONT COLOR="#DD0000"># Forward preprocess events for an Entry to it's EntryField</FONT>
_entryCache[event.widget]._preProcess()
<STRONG>def _postProcess</STRONG>(event, *args):
<FONT COLOR="#DD0000"># Forward postprocess events for an Entry to it's EntryField</FONT>
_entryCache[event.widget]._postProcess()
<STRONG><FONT COLOR="#CC6600">class EntryField</FONT></STRONG>(Pmw.MegaWidget):
_classBindingsDefined = 0
<STRONG> def __init__</STRONG>(self, parent = None, **kw):
<FONT COLOR="#DD0000"># Define the megawidget options.</FONT>
INITOPT = Pmw.INITOPT
optiondefs = (
(<FONT COLOR="#009900">'command'</FONT>, None, None),
(<FONT COLOR="#009900">'errorbackground'</FONT>, <FONT COLOR="#009900">'pink'</FONT>, None),
(<FONT COLOR="#009900">'invalidcommand'</FONT>, self.bell, None),
(<FONT COLOR="#009900">'labelmargin'</FONT>, 0, INITOPT),
(<FONT COLOR="#009900">'labelpos'</FONT>, None, INITOPT),
(<FONT COLOR="#009900">'maxwidth'</FONT>, 0, self._maxwidth),
(<FONT COLOR="#009900">'modifiedcommand'</FONT>, None, None),
(<FONT COLOR="#009900">'validate'</FONT>, None, self._validate),
(<FONT COLOR="#009900">'value'</FONT>, <FONT COLOR="#009900">''</FONT>, INITOPT),
)
self.defineoptions(kw, optiondefs)
<FONT COLOR="#DD0000"># Initialise the base class (after defining the options).</FONT>
Pmw.MegaWidget.__init__(self, parent)
<FONT COLOR="#DD0000"># Create the components.</FONT>
interior = self.interior()
self._entryFieldEntry = self.createcomponent(<FONT COLOR="#009900">'entry'</FONT>,
(), None,
Tkinter.Entry, (interior,))
self._entryFieldEntry.grid(column=2, row=2, sticky=<FONT COLOR="#009900">'nsew'</FONT>)
self._entryFieldEntry.insert(0, self[<FONT COLOR="#009900">'value'</FONT>])
interior.grid_columnconfigure(2, weight=1)
interior.grid_rowconfigure(2, weight=1)
self.createlabel(interior)
<FONT COLOR="#DD0000"># Initialise instance variables.</FONT>
self.normalBackground = None
self._validator = None
self._previousText = None
<FONT COLOR="#DD0000"># Initialise instance.</FONT>
_registerEntryField(self._entryFieldEntry, self)
<FONT COLOR="#DD0000"># establish the special class bindings if not already done</FONT>
if not EntryField._classBindingsDefined:
tagList = self._entryFieldEntry.bindtags()
allSequences = {}
for tag in tagList:
<FONT COLOR="#DD0000"># bind_class returns a string, not a tuple</FONT>
tk = self._hull.tk
sequences = tk.splitlist(self.bind_class(tag))
for sequence in sequences:
allSequences[sequence] = None
for sequence in allSequences.keys():
self.bind_class(<FONT COLOR="#009900">'EntryFieldPre'</FONT>, sequence, _preProcess)
self.bind_class(<FONT COLOR="#009900">'EntryFieldPost'</FONT>, sequence, _postProcess)
EntryField._classBindingsDefined = 1
self._entryFieldEntry.bindtags((<FONT COLOR="#009900">'EntryFieldPre'</FONT>,) +
self._entryFieldEntry.bindtags() + (<FONT COLOR="#009900">'EntryFieldPost'</FONT>,))
self._entryFieldEntry.bind(<FONT COLOR="#009900">'<Return>'</FONT>, self._executeCommand)
<FONT COLOR="#DD0000"># Check keywords and initialise options.</FONT>
self.initialiseoptions(EntryField)
<STRONG> def _maxwidth</STRONG>(self):
maxwidth = self[<FONT COLOR="#009900">'maxwidth'</FONT>]
if type(maxwidth) != types.IntType or maxwidth < 0:
raise ValueError, <FONT COLOR="#009900">'"maxwidth" option should be non-negative integer'</FONT>
self._previousText = None
self._checkValidity()
<STRONG> def _validate</STRONG>(self):
val = self[<FONT COLOR="#009900">'validate'</FONT>]
if _validators.has_key(val):
self._validator = _validators[val]
elif callable(val):
self._validator = val
elif not val:
self._validator = None
else:
validValues = _validators.keys()
validValues.sort()
raise ValueError, \
<FONT COLOR="#009900">'bad validate value "%s": must be a function or one of %s'</FONT> \
% (val, validValues)
self._previousText = None
self._checkValidity()
<STRONG> def _executeCommand</STRONG>(self, event):
cmd = self[<FONT COLOR="#009900">'command'</FONT>]
if callable(cmd):
# Let command return <FONT COLOR="#009900">'break'</FONT>. This is useful if the
<FONT COLOR="#DD0000"># EntryField is in a Dialog and hitting Return in the</FONT>
<FONT COLOR="#DD0000"># EntryField should not invoke the Dialog's default</FONT>
<FONT COLOR="#DD0000"># button.</FONT>
return cmd()
<STRONG> def _preProcess</STRONG>(self):
self._previousText = self._entryFieldEntry.get()
self._previousICursor = self._entryFieldEntry.index(<FONT COLOR="#009900">'insert'</FONT>)
if self._entryFieldEntry.selection_present():
self._previousSel= (self._entryFieldEntry.index(<FONT COLOR="#009900">'sel.first'</FONT>),
self._entryFieldEntry.index(<FONT COLOR="#009900">'sel.last'</FONT>))
else:
self._previousSel = None
<STRONG> def _postProcess</STRONG>(self):
<FONT COLOR="#DD0000"># No need to check if text has not changed.</FONT>
previousText = self._previousText
if previousText == self._entryFieldEntry.get():
return self.valid()
valid = self._checkValidity()
cmd = self[<FONT COLOR="#009900">'modifiedcommand'</FONT>]
if callable(cmd) and previousText != self._entryFieldEntry.get():
cmd()
return valid
<STRONG> def _getValidity</STRONG>(self):
input = self._entryFieldEntry.get()
if self[<FONT COLOR="#009900">'maxwidth'</FONT>] and len(input) > self[<FONT COLOR="#009900">'maxwidth'</FONT>]:
return 0
elif self._validator:
return self._validator(input)
else:
return 1
<STRONG> def _checkValidity</STRONG>(self):
valid = self._getValidity()
oldValidity = valid
if valid == 0:
<FONT COLOR="#DD0000"># The entry is invalid.</FONT>
cmd = self[<FONT COLOR="#009900">'invalidcommand'</FONT>]
if callable(cmd):
cmd()
<FONT COLOR="#DD0000"># Restore the entry to its previous value.</FONT>
if self._previousText is not None:
self.__setEntry(self._previousText)
self._entryFieldEntry.icursor(self._previousICursor)
if self._previousSel is not None:
self._entryFieldEntry.selection_range(self._previousSel[0],
self._previousSel[1])
<FONT COLOR="#DD0000"># Check if the saved text is valid as well.</FONT>
valid = self._getValidity()
self._valid = valid
if valid == 1:
if self.normalBackground is not None:
self._entryFieldEntry.configure(
background = self.normalBackground)
self.normalBackground = None
else:
if self.normalBackground is None:
self.normalBackground = self._entryFieldEntry.cget(<FONT COLOR="#009900">'background'</FONT>)
self._entryFieldEntry.configure(
background = self[<FONT COLOR="#009900">'errorbackground'</FONT>])
return oldValidity
<STRONG> def invoke</STRONG>(self):
cmd = self[<FONT COLOR="#009900">'command'</FONT>]
if callable(cmd):
cmd()
<STRONG> def valid</STRONG>(self):
return self._valid == 1
<STRONG> def clear</STRONG>(self):
self._entryFieldEntry.delete(0, <FONT COLOR="#009900">'end'</FONT>)
<STRONG> def __setEntry</STRONG>(self, text):
disabled = (self._entryFieldEntry.cget(<FONT COLOR="#009900">'state'</FONT>) == <FONT COLOR="#009900">'disabled'</FONT>)
if disabled:
self._entryFieldEntry.configure(state=<FONT COLOR="#009900">'normal'</FONT>)
self._entryFieldEntry.delete(0, <FONT COLOR="#009900">'end'</FONT>)
self._entryFieldEntry.insert(0, text)
if disabled:
self._entryFieldEntry.configure(state=<FONT COLOR="#009900">'disabled'</FONT>)
<STRONG> def setentry</STRONG>(self, text):
self._preProcess()
self.__setEntry(text)
return self._postProcess()
Pmw.forwardmethods(EntryField, Tkinter.Entry, <FONT COLOR="#009900">'_entryFieldEntry'</FONT>)
</PRE>
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