class Transaction(object):
"""
Modeling-specific! API should settle into something agnostic.
"""
interface.implements(ITransaction)
def __init__(self):
self.reset()
def reset(self):
self.editingContext = EditingContext()
self.tracked = []
def track(self, *objects):
for anObject in objects:
if anObject.editingContext() is None:
self.editingContext.insertObject(anObject)
self.tracked.append(anObject)
if anObject.editingContext() is not self.editingContext:
raise ValueError, 'object already is being tracked'
if anObject.transaction() is None:
anObject.transaction = weakref.ref(self)
def forget(self, anObject):
if anObject.editingContext():
self.editingContext.forgetObject(anObject)
def search(self, aClass, qual=nullQualifier):
try:
name = aClass.__name__
except AttributeError:
# pray it's a string
name = aClass
logger.debug (name+": "+qual.value)
result = self.editingContext.fetch(name, qual.value)
for i in result:
self.track(i)
print 'ok', result
return result
def discard(self):
for i in self.tracked:
self.forget(i)
self.reset()
def save(self):
self.editingContext.saveChanges()
class Transaction(object):
"""
Modeling-specific! API should settle into something agnostic.
"""
interface.implements(ITransaction)
def __init__(self):
self.reset()
def reset(self):
self.editingContext = EditingContext()
self.tracked = []
def track(self, *objects):
for anObject in objects:
if anObject.editingContext() is None:
self.editingContext.insertObject(anObject)
self.tracked.append(anObject)
if anObject.editingContext() is not self.editingContext:
raise ValueError, 'object already is being tracked'
if anObject.transaction() is None:
anObject.transaction = weakref.ref(self)
def forget(self, anObject):
if anObject.editingContext():
self.editingContext.forgetObject(anObject)
def search(self, aClass, qual=nullQualifier):
try:
name = aClass.__name__
except AttributeError:
# pray it's a string
name = aClass
logger.debug(name + ": " + qual.value)
result = self.editingContext.fetch(name, qual.value)
for i in result:
self.track(i)
print 'ok', result
return result
def discard(self):
for i in self.tracked:
self.forget(i)
self.reset()
def save(self):
self.editingContext.saveChanges()
class ConsistencyController (ViewController, Composite):
"""
Controller that warns the user that is trying to close the window
when the data is dirty. It also has a NoteBook.
"""
__kwargs= ('windowTitle', 'model', 'modelClass')
def __init__ (self, *args, **kwargs):
# already takes care of model and modelClass params via setModel{,Class}()
# self.editingContext= NewEditingContext ()
self.editingContext= EditingContext ()
self._processArgs(ConsistencyController, kwargs)
def buildView (self):
self.win= ui.Window (parent=self.getParent(),
title=self.getWindowTitle ())
self.win.addDelegation (self)
v= ui.VBox (parent=self.win)
self.tabbook= ui.Notebook (parent=v)
# the save button is connected to the action thru save()
h= ui.HBox (parent=v)
okButton= ui.Button (parent=h,
action=lambda *ignore: self.save (),
label=u'_Guardar')
resetButton= ui.Button (parent=h,
action=lambda *ignore: self.reset (),
label=u'_Reestablecer valores anteriores')
def show (self):
self.update ()
self.win.show ()
def hide (self):
self.win.hide ()
def _getView (self):
return getattr (self, 'win', None)
def addChild (self, child, label):
self.tabbook.appendPage (child, label)
super (ConsistencyController, self).addChild (child)
def setWindowTitle (self, windowTitle):
self.windowTitle= windowTitle
def getWindowTitle (self):
return self.windowTitle
def save (self):
model= self.getModel ()
try:
self.debug ('saving %s[%s]' % (model, str (model.globalID ().keyValues ())))
except:
self.debug ('saving %s' % model)
for child in self.getChildren ():
# so children can add new objects
child.aboutToSave ()
self.debug ("save: child's ec: %s" % child.getEditingContext ())
self.debug ("save: our ec: %s" % self.editingContext)
self.editingContext.saveChanges ()
self.debug ('saving %s[%s]' % (model, str (model.globalID ())))
if model.globalID ().isTemporary ():
# is a new inserted and now saved model
# gotta refetch.
self.debug ('refetching')
# alias
commit= save
def reset (self):
# BUG: does this leak mem?
self.holdModel ()
self.setEditingContext (EditingContext ())
# here there is no model!
self.insertModel ()
# tell the children a new model has born
self.changeModel ()
# alias
rollback= reset
def isDirty (self):
dirty= False
for child in self.getChildren ():
dirty|= bool (child.isDirty ())
return dirty
def updateView (self):
# """
# abstact method. please reimplement.
# """
self.win.update ()
# alias
update= updateView
def updateModel (self, model=None):
if model:
self.setModel (model)
else:
model= self.getModel ()
return model
def will_delete (self, *ignore):
"""
delegate for the window destroy action.
doesn't allow destroying it, just hides it
"""
if self.isDirty ():
# tis dirty, ask the user
if ui.WarningDialog (message=u'Los cambios no han sido guardados. Qué desea hacer con ellos?', yea=u'_Guardar', nay= u'_Descartar').run ():
self.save ()
else:
self.reset ()
self.win.hide ()
return Failed
class ConsistencyController(ViewController, Composite):
"""
Controller that warns the user that is trying to close the window
when the data is dirty. It also has a NoteBook.
"""
__kwargs = ('windowTitle', 'model', 'modelClass')
def __init__(self, *args, **kwargs):
# already takes care of model and modelClass params via setModel{,Class}()
# self.editingContext= NewEditingContext ()
self.editingContext = EditingContext()
self._processArgs(ConsistencyController, kwargs)
def buildView(self):
self.win = ui.Window(parent=self.getParent(),
title=self.getWindowTitle())
self.win.addDelegation(self)
v = ui.VBox(parent=self.win)
self.tabbook = ui.Notebook(parent=v)
# the save button is connected to the action thru save()
h = ui.HBox(parent=v)
okButton = ui.Button(parent=h,
action=lambda *ignore: self.save(),
label=u'_Guardar')
resetButton = ui.Button(parent=h,
action=lambda *ignore: self.reset(),
label=u'_Reestablecer valores anteriores')
def show(self):
self.update()
self.win.show()
def hide(self):
self.win.hide()
def _getView(self):
return getattr(self, 'win', None)
def addChild(self, child, label):
self.tabbook.appendPage(child, label)
super(ConsistencyController, self).addChild(child)
def setWindowTitle(self, windowTitle):
self.windowTitle = windowTitle
def getWindowTitle(self):
return self.windowTitle
def save(self):
model = self.getModel()
try:
self.debug('saving %s[%s]' %
(model, str(model.globalID().keyValues())))
except:
self.debug('saving %s' % model)
for child in self.getChildren():
# so children can add new objects
child.aboutToSave()
self.debug("save: child's ec: %s" % child.getEditingContext())
self.debug("save: our ec: %s" % self.editingContext)
self.editingContext.saveChanges()
self.debug('saving %s[%s]' % (model, str(model.globalID())))
if model.globalID().isTemporary():
# is a new inserted and now saved model
# gotta refetch.
self.debug('refetching')
# alias
commit = save
def reset(self):
# BUG: does this leak mem?
self.holdModel()
self.setEditingContext(EditingContext())
# here there is no model!
self.insertModel()
# tell the children a new model has born
self.changeModel()
# alias
rollback = reset
def isDirty(self):
dirty = False
for child in self.getChildren():
dirty |= bool(child.isDirty())
return dirty
def updateView(self):
# """
# abstact method. please reimplement.
# """
self.win.update()
# alias
update = updateView
def updateModel(self, model=None):
if model:
self.setModel(model)
else:
model = self.getModel()
return model
def will_delete(self, *ignore):
"""
delegate for the window destroy action.
doesn't allow destroying it, just hides it
"""
if self.isDirty():
# tis dirty, ask the user
if ui.WarningDialog(
message=
u'Los cambios no han sido guardados. Qué desea hacer con ellos?',
yea=u'_Guardar',
nay=u'_Descartar').run():
self.save()
else:
self.reset()
self.win.hide()
return Failed