appypod-rattail/fields/boolean.py

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# ------------------------------------------------------------------------------
# This file is part of Appy, a framework for building applications in the Python
# language. Copyright (C) 2007 Gaetan Delannay
# Appy is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
# Appy is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along with
# Appy. If not, see <http://www.gnu.org/licenses/>.
# ------------------------------------------------------------------------------
from appy.fields import Field
from appy.px import Px
from appy.gen.layout import Table
# ------------------------------------------------------------------------------
class Boolean(Field):
'''Field for storing boolean values.'''
yesNo = {'true': 'yes', 'false': 'no', True: 'yes', False: 'no'}
trueFalse = {True: 'true', False: 'false'}
# Default layout (render = "checkbox") ("b" stands for "base").
bLayouts = {'view': 'lf', 'edit': Table('f;lrv;=', width=None),
'search': 'l-f'}
# Layout including a description.
dLayouts = {'view': 'lf', 'edit': Table('flrv;=d', width=None)}
# Centered layout, no description.
cLayouts = {'view': 'lf|', 'edit': 'flrv|'}
# Layout for radio buttons (render = "radios")
rLayouts = {'edit': 'f', 'view': 'f', 'search': 'l-f'}
rlLayouts = {'edit': 'l-f', 'view': 'lf', 'search': 'l-f'}
pxView = pxCell = Px('''<x>:value</x>
<input type="hidden" if="masterCss"
class=":masterCss" value=":rawValue" name=":name" id=":name"/>''')
pxEdit = Px('''<x var="isTrue=field.isTrue(zobj, rawValue)">
<x if="field.render == 'checkbox'">
<input type="checkbox" name=":name + '_visible'" id=":name"
class=":masterCss" checked=":isTrue"
onclick=":'toggleCheckbox(%s, %s); %s' % (q(name), \
q('%s_hidden' % name), \
field.getOnChange(zobj, layoutType))"/>
<input type="hidden" name=":name" id=":'%s_hidden' % name"
value=":isTrue and 'True' or 'False'"/>
</x>
<x if="field.render == 'radios'"
var2="falseId='%s_false' % name;
trueId='%s_true' % name">
<input type="radio" name=":name" id=":falseId" class=":masterCss"
value="False" checked=":not isTrue"/>
<label lfor=":falseId">:_(field.labelId + '_false')</label><br/>
<input type="radio" name=":name" id=":trueId" class=":masterCss"
value="True" checked=":isTrue"/>
<label lfor=":trueId">:_(field.labelId + '_true')</label>
</x></x>''')
pxSearch = Px('''<x var="typedWidget='%s*bool' % widgetName">
<x var="valueId='%s_yes' % name">
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<input type="radio" value="True" name=":typedWidget" id=":valueId"/>
<label lfor=":valueId">:_(field.getValueLabel(True))</label>
</x>
<x var="valueId='%s_no' % name">
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<input type="radio" value="False" name=":typedWidget" id=":valueId"/>
<label lfor=":valueId">:_(field.getValueLabel(False))</label>
</x>
<x var="valueId='%s_whatever' % name">
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<input type="radio" value="" name=":typedWidget" id=":valueId"
checked="checked"/>
<label lfor=":valueId">:_('whatever')</label>
</x><br/></x>''')
def __init__(self, validator=None, multiplicity=(0,1), default=None,
show=True, page='main', group=None, layouts = None, move=0,
indexed=False, searchable=False, specificReadPermission=False,
specificWritePermission=False, width=None, height=None,
maxChars=None, colspan=1, master=None, masterValue=None,
focus=False, historized=False, mapping=None, label=None,
sdefault=False, scolspan=1, swidth=None, sheight=None,
persist=True, render='checkbox'):
# By default, a boolean is edited via a checkbox. It can also be edited
# via 2 radio buttons (p_render="radios").
self.render = render
Field.__init__(self, validator, multiplicity, default, show, page,
group, layouts, move, indexed, searchable,
specificReadPermission, specificWritePermission, width,
height, None, colspan, master, masterValue, focus,
historized, mapping, label, sdefault, scolspan, swidth,
sheight, persist)
self.pythonType = bool
def getDefaultLayouts(self):
return (self.render == 'radios') and self.rLayouts or self.bLayouts
def getValue(self, obj):
'''Never returns "None". Returns always "True" or "False", even if
"None" is stored in the DB.'''
value = Field.getValue(self, obj)
if value == None: return False
return value
def getValueLabel(self, value):
'''Returns the label for p_value (True or False): if self.render is
"checkbox", the label is simply the translated version of "yes" or
"no"; if self.render is "radios", there are specific labels.'''
if self.render == 'radios':
return '%s_%s' % (self.labelId, self.trueFalse[value])
return self.yesNo[value]
def getFormattedValue(self, obj, value, showChanges=False):
return obj.translate(self.getValueLabel(value))
def getStorableValue(self, value):
if not self.isEmptyValue(value):
exec 'res = %s' % value
return res
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def isTrue(self, obj, dbValue):
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'''When rendering this field as a checkbox, must it be checked or
not?'''
rq = obj.REQUEST
# Get the value we must compare (from request or from database)
if rq.has_key(self.name):
return rq.get(self.name) in ('True', 1, '1')
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return dbValue
# ------------------------------------------------------------------------------