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[gen] Master-slave fields: slave values can now ajax-change when the user modifies master values.

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This commit is contained in:
Gaetan Delannay 2014-03-03 18:54:21 +01:00
parent f7172be6ee
commit b8ceb66a49
15 changed files with 253 additions and 74 deletions
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46
fields/__init__.py
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@ -49,7 +49,8 @@ class Field:
# * showChanges If True, a variant of the field showing successive changes
# made to it is shown.
pxRender = Px('''
<x var="showChanges=showChanges|False;
<x var="showChanges=showChanges|req.get('showChanges',False);
layoutType=layoutType|req.get('layoutType');
layout=field.layouts[layoutType];
name=fieldName|field.name;
sync=field.sync[layoutType];
@ -65,8 +66,7 @@ class Field:
isMultiple=(field.multiplicity[1] == None) or \
(field.multiplicity[1] &gt; 1);
masterCss=field.slaves and ('master_%s' % name) or '';
slaveCss=field.master and ('slave_%s_%s' % \
(field.masterName, '_'.join(field.masterValue))) or '';
slaveCss=field.getSlaveCss();
tagCss=tagCss|'';
tagCss=('%s %s' % (slaveCss, tagCss)).strip();
tagId='%s_%s' % (zobj.UID(), name);
@ -170,7 +170,12 @@ class Field:
# The behaviour of this field may depend on another, "master" field
self.master = master
if master: self.master.slaves.append(self)
# When master has some value(s), there is impact on this field.
# The semantics of attribute "masterValue" below is as follows:
# - if "masterValue" is anything but a method, the field will be shown
# only when the master has this value, or one of it if multivalued;
# - if "masterValue" is a method, the value(s) of the slave field will
# be returned by this method, depending on the master value(s) that
# are given to it, as its unique parameter.
self.masterValue = gutils.initMasterValue(masterValue)
# If a field must retain attention in a particular way, set focus=True.
# It will be rendered in a special way.
@ -323,6 +328,7 @@ class Field:
if not masterData: return True
else:
master, masterValue = masterData
if masterValue and callable(masterValue): return True
reqValue = master.getRequestValue(obj.REQUEST)
# reqValue can be a list or not
if type(reqValue) not in sutils.sequenceTypes:
@ -567,6 +573,38 @@ class Field:
if self.master: return (self.master, self.masterValue)
if self.group: return self.group.getMasterData()
def getSlaveCss(self):
'''Gets the CSS class that must apply to this field in the web UI when
this field is the slave of another field.'''
if not self.master: return ''
res = 'slave*%s*' % self.masterName
if not callable(self.masterValue):
res += '*'.join(self.masterValue)
else:
res += '+'
return res
def getOnChange(self, name, zobj, layoutType):
'''When this field is a master, this method computes the call to the
Javascript function that will be called when its value changes (in
order to update slaves).'''
if not self.slaves: return ''
q = zobj.getTool().quote
# Create the dict of request values for slave fields.
rvs = {}
req = zobj.REQUEST
for slave in self.slaves:
name = slave.name
if not req.has_key(name): continue
if not req[name]: continue
rvs[name] = req[name]
if rvs:
rvs = ',%s' % sutils.getStringDict(rvs)
else:
rvs = ''
return 'updateSlaves(this,null,%s,%s%s)' % \
(q(zobj.absolute_url()), q(layoutType), rvs)
def isEmptyValue(self, value, obj=None):
'''Returns True if the p_value must be considered as an empty value.'''
return value in self.nullValues