def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode,
tree=True)
for item in self.get_saved_items():
if hasattr(item, 'parent_item'):
def add_result(result):
parent = result.parent_item
if parent:
add_result(parent)
if result not in self.slave.klist:
self.slave.klist.append(parent, result)
self.slave.klist.expand(result)
add_result(item)
else:
self.slave.klist.append(None, item)
self.slave.klist.connect('cell-edited', self._on_klist__cell_edited)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def __init__(self, store, printer):
self._printer = printer
self._constant_type = None
AdditionListSlave.__init__(self, store, self._get_columns())
self.connect('on-add-item', self._on_list_slave__add_item)
self.connect('before-delete-items',
self._on_list_slave__before_delete_items)
def __init__(self, store, printer):
self._printer = printer
self._constant_type = None
AdditionListSlave.__init__(self, store,
self._get_columns())
self.connect('on-add-item', self._on_list_slave__add_item)
self.connect('before-delete-items',
self._on_list_slave__before_delete_items)
def setup_slaves(self):
self.slave = AdditionListSlave(self.store,
self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode,
tree=True)
for item in self.get_saved_items():
if hasattr(item, 'parent_item'):
def add_result(result):
parent = result.parent_item
if parent:
add_result(parent)
if result not in self.slave.klist:
self.slave.klist.append(parent, result)
self.slave.klist.expand(result)
add_result(item)
else:
self.slave.klist.append(None, item)
self.slave.klist.connect('cell-edited', self._on_klist__cell_edited)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store,
self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode,
)
self.slave.klist.connect("cell-edited", self._on_klist__cell_edited)
self.slave.connect("before-delete-items", self._on_list_slave__before_delete_items)
self.slave.connect("after-delete-items", self._on_list_slave__after_delete_items)
self.slave.connect("on-edit-item", self._on_list_slave__edit_item)
self.slave.connect("on-add-item", self._on_list_slave__add_item)
self.attach_slave("list_holder", self.slave)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gladefile = 'SellableItemSlave'
proxy_widgets = (
'quantity',
'unit_label',
'cost',
'minimum_quantity',
'stock_quantity',
'sellable_description',
)
summary_label_text = None
summary_label_column = 'total'
value_column = 'cost'
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
validate_value = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
def __init__(self, store, model=None, visual_mode=None):
super(SellableItemSlave, self).__init__(store,
model=model,
visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(self.store,
self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
cost = self.cost.read()
item = self.get_order_item(sellable, cost, quantity)
if item is None:
return
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(item)
self._update_total()
self._reset_sellable()
return item
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(
value and bool(self.proxy.model)
and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view,
Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
"""
raise NotImplementedError('This method must be defined on child')
def get_saved_items(self):
raise NotImplementedError('This method must be defined on child')
def get_columns(self):
raise NotImplementedError('This method must be defined on child')
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def sellable_selected(self, sellable):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected sellable
"""
has_storable = False
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u''
unit_label = u''
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.get_unit_description()
if storable:
has_storable = True
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
else:
self.barcode.set_text('')
model = Settable(quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label)
self.proxy.set_model(model)
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
#
# Private
#
def _setup_widgets(self):
self._update_product_labels_visibility(False)
self.quantity.set_sensitive(False)
self.cost.set_sensitive(False)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(
gtk.Adjustment(lower=0, upper=sys.maxint, step_incr=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(sysparam(self.store).COST_PRECISION_DIGITS)
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain([
self.barcode, self.quantity, self.cost, self.add_sellable_button,
self.product_button
])
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format='<b>%s</b>')
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, expand=False)
def _run_advanced_search(self, search_str=None):
supplier = None
has_supplier = hasattr(self.model, 'supplier')
if has_supplier:
supplier = self.model.supplier
table, query = self.get_sellable_view_query()
ret = run_dialog(AdvancedSellableSearch,
self.get_parent(),
self.store,
table=table,
query=query,
search_str=search_str,
supplier=supplier,
hide_toolbar=not self.sellable_editable)
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(
ret,
(Product, ProductFullStockItemView, ProductComponentView,
SellableFullStockView, ServiceView, ProductWithStockView)):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _get_sellable(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None
barcode = unicode(barcode, 'utf-8')
viewable, default_query = self.get_sellable_view_query()
query = viewable.barcode == barcode
if default_query:
query = And(query, default_query)
# FIXME: doing list() here is wrong. But there is a bug in one of
# the queries, that len() == 1 but results.count() == 2.
results = list(self.store.find(viewable, query))
if len(results) != 1:
return None
sellable = results[0].sellable
if not sellable:
return None
elif not self.can_add_sellable(sellable):
return
return sellable
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.proxy.set_model(None)
self.sellable_selected(None)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.barcode.set_text('')
def _update_total(self):
if self.summary:
self.summary.update_total()
self.force_validation()
def _update_product_labels_visibility(self, visible):
for widget in [
self.minimum_quantity_lbl, self.minimum_quantity,
self.stock_quantity, self.stock_quantity_lbl
]:
widget.set_visible(visible)
#
# Callbacks
#
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self._update_total()
def _on_list_slave__add_item(self, slave, item):
self._update_total()
def _on_list_slave__edit_item(self, slave, item):
self._update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._run_advanced_search()
def on_barcode__activate(self, widget):
sellable = self._get_sellable()
if not sellable:
search_str = unicode(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable)
self.quantity.grab_focus()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# only support positive quantities
if value <= 0:
return ValidationError(_(u'The quantity must be positive'))
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(
_(u"This product unit (%s) does not "
u"support fractions.") % sellable.get_unit_description())
storable = sellable.product_storable
if (self.validate_stock and storable and
value > storable.get_balance_for_branch(self.model.branch)):
return ValidationError(
_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
if value <= 0:
return ValidationError(_(u'Cost must be greater than zero.'))
if self.validate_value:
client = getattr(self.model, 'client', None)
if not sellable.is_valid_price(value, client.category):
return ValidationError(
_(u"Max discount for this product "
u"is %.2f%%") % sellable.max_discount)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gsignal('sellable-selected', object)
gladefile = 'SellableItemSlave'
proxy_widgets = ('quantity',
'unit_label',
'cost',
'minimum_quantity',
'stock_quantity',
'sellable_description', )
summary_label_text = None
summary_label_column = 'total'
value_column = 'cost'
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
#: If we should also validate the price of the sellable. (checking if it is
#: respecting the rules of discount
validate_price = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
batch_selection_dialog = None
#: the sellable search class used to select a sellable to add on the list
sellable_search = SellableSearch
#: if we should allow to add an item without available batches (no stock).
#: Can happen when selecting a product that control batches for decrease,
#: in that case, :meth:`.get_order_item` will receive *batch=None*
allow_no_batch = False
#: the mode to pass to the
#: :class:`stoqlib.gui.widgets.calculator.CalculatorPopup`.
#: If ``None``, the calculator will not be attached
calculator_mode = None
#: If we should add the sellable on the list when activating the barcode.
#: This is useful when the barcode is supposed to work with barcode
#: readers. Note that, if the sellable with the given barcode wasn't found,
#: it'll just be cleared and no error message will be displayed
add_sellable_on_barcode_activate = False
#: If we should make visible a label showing the stock and the minimum
#: quantity of a sellable when one is selected. Note that sellables
#: without storables (e.g. services) won't have them shown anyway
stock_labels_visible = True
def __init__(self, store, parent, model=None, visual_mode=None):
self.parent = parent
# The manager is someone who can allow a bigger discount for a sale item
self.manager = None
# This is used by add_sellable to know what item represents
# a given sellable/batch/value so it can be removed without
# needing to ask for the children class
self._items_cache = {}
super(SellableItemSlave, self).__init__(store, model=model,
visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
if self.calculator_mode is not None:
self.calculator_popup = CalculatorPopup(self.cost,
self.calculator_mode)
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode,
tree=True)
for item in self.get_saved_items():
if hasattr(item, 'parent_item'):
def add_result(result):
parent = result.parent_item
if parent:
add_result(parent)
if result not in self.slave.klist:
self.slave.klist.append(parent, result)
self.slave.klist.expand(result)
add_result(item)
else:
self.slave.klist.append(None, item)
self.slave.klist.connect('cell-edited', self._on_klist__cell_edited)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable, parent=None):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
value = self.cost.read()
storable = sellable.product_storable
order_items = []
batch = self.proxy.model.batch
# If a batch_number is selected, we will add that item directly. But
# we need to adjust the batch's type since places using any
# batch selection different from BatchDecreaseSelectionDialog will
# be expecting the batch number
if batch and not issubclass(self.batch_selection_dialog,
BatchDecreaseSelectionDialog):
batch = batch.batch_number
if (storable is not None and storable.is_batch and batch is None and
self.batch_selection_dialog is not None):
order_items.extend(self.get_batch_order_items(sellable,
value, quantity))
else:
order_item = self.get_order_item(sellable, value, quantity,
batch=batch, parent=parent)
if order_item is not None:
order_items.append(order_item)
for item in order_items:
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(parent, item)
product = item.sellable.product
if product and product.is_package and parent is None:
for child in self.proxy.model.children:
self.add_sellable(child, parent=item)
self.slave.klist.expand(item)
self.update_total()
if len(order_items):
self._reset_sellable()
# After an item is added, reset manager to None so the discount is only
# authorized for one item at a time.
self.manager = None
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
# We need to remove the children before remove the parent_item
self.remove_items(getattr(item, 'children_items', []))
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_remaining_quantity(self, sellable, batch=None):
"""Returns the remaining quantity in stock for the given *sellable*
This will check the remaining quantity in stock taking the
items on the list in consideration. This is very useful since
these items still haven't decreased stock.
:param sellable: the |sellable| to be checked for remaining
quantity
:param batch: if not ``None``, the remaining quantity will
be checked taking the |batch| in consideration
:return: the remaining quantity or ``None`` if the sellable
doesn't control stock (e.g. a service)
"""
if sellable.service or sellable.product_storable is None:
return None
total_quatity = sum(i.quantity for i in self.slave.klist if
(i.sellable, i.batch) == (sellable, batch))
branch = self.model.branch
storable = sellable.product_storable
# FIXME: It would be better to just use storable.get_balance_for_branch
# and pass batch=batch there. That would avoid this if
if batch is not None:
balance = batch.get_balance_for_branch(branch)
else:
balance = storable.get_balance_for_branch(branch)
return balance - total_quatity
def update_total(self):
"""Update the summary label with the current total"""
if self.summary:
self.summary.update_total()
self.force_validation()
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(value
and bool(self.proxy.model)
and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view,
Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity, batch=None, parent=None):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
:param sellable: the selected |sellable|
:param value: the value selected for the sellable
:param quantity: the quantity selected for the sellable
:param batch: the batch that was selected for the sellable.
Note that this argument will only be passed if
:attr:`.batch_selection_dialog` is defined.
"""
raise NotImplementedError('This method must be defined on child')
def get_saved_items(self):
raise NotImplementedError('This method must be defined on child')
def get_columns(self):
raise NotImplementedError('This method must be defined on child')
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def get_sellable_model(self, sellable, batch=None):
"""Create a Settable containing multiple information to be used on the
slave.
:param sellable: a |sellable| we are adding to wizard
:returns: a Settable containing some information of the item
"""
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u''
unit_label = u''
children = {}
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.unit_description
if storable:
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
product = sellable.product
if product:
for component in product.get_components():
child_sellable = component.component.sellable
children[child_sellable] = self.get_sellable_model(child_sellable)
return Settable(quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label,
batch=batch,
children=children)
def sellable_selected(self, sellable, batch=None):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected |sellable|
:param batch: the |batch|, if the |sellable| was selected
by it's batch_number
"""
has_storable = False
self.proxy.set_model(self.get_sellable_model(sellable, batch=batch))
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
unit = sellable and sellable.unit
self.quantity.set_digits(
QUANTITY_PRECISION if unit and unit.allow_fraction else 0)
self.emit('sellable-selected', sellable)
def get_batch_items(self):
"""Get batch items for sellables inside this slave
:returns: a dict mapping the batch to it's quantity
"""
batch_items = collections.OrderedDict()
for item in self.slave.klist:
if item.batch is None:
continue
batch_items.setdefault(item.batch, 0)
# Sum all quantities of the same batch
batch_items[item.batch] += item.quantity
return batch_items
def get_batch_order_items(self, sellable, value, quantity):
"""Get order items for sellable considering it's |batches|
By default, this will run :obj:`.batch_selection_dialog` to get
the batches and their quantities and then call :meth:`.get_order_item`
on each one.
:param sellable: a |sellable|
:param value: the value (e.g. price, cost) of the sellable
:param quantity: the quantity of the sellable
"""
order_items = []
storable = sellable.product_storable
original_batch_items = self.get_batch_items()
if issubclass(self.batch_selection_dialog,
BatchDecreaseSelectionDialog):
extra_kw = dict(decreased_batches=original_batch_items)
available_batches = list(
storable.get_available_batches(self.model.branch))
# If there're no available batches (no stock) and we are allowing
# no batches, add the item without the batch.
if len(available_batches) == 0 and self.allow_no_batch:
return [self.get_order_item(sellable, value,
quantity=quantity)]
# The trivial case, where there's just one batch, and since this
# is a decrease, we can select it directly
if len(available_batches) == 1:
batch = available_batches[0]
return [self.get_order_item(sellable, value,
quantity=quantity, batch=batch)]
else:
extra_kw = dict(original_batches=original_batch_items)
retval = run_dialog(
self.batch_selection_dialog, self.get_parent(),
store=self.store, model=storable, quantity=quantity, **extra_kw)
retval = retval or {}
for batch, b_quantity in retval.items():
order_item = self.get_order_item(sellable, value,
quantity=b_quantity,
batch=batch)
if order_item is None:
continue
order_items.append(order_item)
return order_items
def get_extra_discount(self, sellable):
"""Called to get an extra discount for the sellable being added
Subclasses can implement this to allow some extra discount for the
sellable being added. For example, one can implement this to
allow some extra discount based on the unused discount on the
already added items
Note that, if you need to get the manager to check for max discount,
you can use :obj:`.manager`
:param sellable: the sellable being added
:returns: the extra discount for the sellable being added,
or ``None`` if not extra discount should be allowed
"""
return None
def get_sellable_search_extra_kwargs(self):
"""Called to get extra args for :attr:`.sellable_search`
A subclass can override this and return a dict with extra keywords
to pass to the sellable search defined on the class.
:returns: a ``dict`` of extra keywords
"""
return {}
#
# Private
#
def _setup_widgets(self):
self._update_product_labels_visibility(False)
cost_digits = sysparam.get_int('COST_PRECISION_DIGITS')
self.quantity.set_sensitive(False)
# 10 for the length of MAX_INT, 3 for the precision and 1 for comma
self.quantity.set_max_length(14)
self.cost.set_sensitive(False)
# 10 for the length of MAX_INT and 1 for comma
self.cost.set_max_length(10 + cost_digits + 1)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(Gtk.Adjustment(lower=0, upper=MAX_INT,
step_increment=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(cost_digits)
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain([self.barcode,
self.quantity, self.cost,
self.add_sellable_button,
self.product_button])
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format='<b>%s</b>')
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, False, True, 0)
def _run_advanced_search(self, search_str=None):
table, query = self.get_sellable_view_query()
ret = run_dialog(self.sellable_search, self.get_parent(),
self.store,
search_spec=table,
search_query=query,
search_str=search_str,
hide_toolbar=not self.sellable_editable,
**self.get_sellable_search_extra_kwargs())
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(ret, (Product, ProductFullStockItemView,
ProductComponentView, SellableFullStockView,
ServiceView, ProductFullStockView)):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
if sellable.barcode:
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _find_sellable_and_batch(self, text):
"""Find a sellable given a code, barcode or batch_number
When searching using the code attribute of the sellable, the search will
be case insensitive.
:param text: the code, barcode or batch_number
:returns: The sellable that matches the given barcode or code or
``None`` if nothing was found.
"""
viewable, default_query = self.get_sellable_view_query()
# FIXME: Put this logic for getting the sellable based on
# barcode/code/batch_number on domain. Note that something very
# simular is done on POS app
# First try barcode, then code since there might be a product
# with a code equal to another product's barcode
for attr in [viewable.barcode, viewable.code]:
query = Lower(attr) == text.lower()
if default_query:
query = And(query, default_query)
result = self.store.find(viewable, query).one()
if result:
return result.sellable, None
# if none of the above worked, try to find by batch number
query = Lower(StorableBatch.batch_number) == text.lower()
batch = self.store.find(StorableBatch, query).one()
if batch:
sellable = batch.storable.product.sellable
query = viewable.id == sellable.id
if default_query:
query = And(query, default_query)
# Make sure batch's sellable is in the view
if not self.store.find(viewable, query).is_empty():
return sellable, batch
return None, None
def _get_sellable_and_batch(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None, None
sellable, batch = self._find_sellable_and_batch(barcode)
if not sellable:
return None, None
elif not self.can_add_sellable(sellable):
return None, None
return sellable, batch
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.sellable_selected(None)
def _update_product_labels_visibility(self, visible):
for widget in [self.minimum_quantity_lbl, self.minimum_quantity,
self.stock_quantity, self.stock_quantity_lbl]:
widget.set_visible(self.stock_labels_visible and visible)
def _try_get_sellable(self):
"""Try to get the sellable based on the barcode typed
This will try to get the sellable using the barcode the user entered.
If one is not found, than an advanced search will be displayed for
the user, and the string he typed in the barcode entry will be
used to filter the results.
"""
sellable, batch = self._get_sellable_and_batch()
if not sellable:
if self.add_sellable_on_barcode_activate:
return
search_str = str(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable, batch=batch)
if (self.add_sellable_on_barcode_activate and
self.add_sellable_button.get_sensitive()):
self._add_sellable()
else:
self.quantity.grab_focus()
#
# Callbacks
#
def _on_klist__cell_edited(self, klist, obj, attr):
self.update_total()
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self.update_total()
def _on_list_slave__add_item(self, slave, item):
self.update_total()
def _on_list_slave__edit_item(self, slave, item):
self.update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._try_get_sellable()
def on_barcode__activate(self, widget):
self._try_get_sellable()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# Only support positive quantities
if value <= 0:
return ValidationError(_(u'The quantity must be positive'))
# Dont allow numbers bigger than MAX_INT (see stoqlib.lib.defaults)
if value > MAX_INT:
return ValidationError(_(u'The quantity cannot be bigger than %s') % MAX_INT)
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(_(u"This product unit (%s) does not "
u"support fractions.") %
sellable.unit_description)
storable = sellable.product_storable
if not self.validate_stock or not storable:
return
remaining_quantity = self.get_remaining_quantity(sellable)
if remaining_quantity is None:
return
if value > remaining_quantity:
return ValidationError(_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
# Dont allow numbers bigger than MAX_INT (see stoqlib.lib.defaults)
if value > MAX_INT:
return ValidationError(_('Price cannot be bigger than %s') % MAX_INT)
if value <= 0:
return ValidationError(_(u'Cost must be greater than zero.'))
if self.validate_price:
category = getattr(self.model, 'client_category', None)
default_price = sellable.get_price_for_category(category)
if (not sysparam.get_bool('ALLOW_HIGHER_SALE_PRICE') and
value > default_price):
return ValidationError(_(u'The sell price cannot be greater '
'than %s.') % default_price)
manager = self.manager or api.get_current_user(self.store)
client = getattr(self.model, 'client', None)
category = client and client.category
extra_discount = self.get_extra_discount(sellable)
valid_data = sellable.is_valid_price(value, category, manager,
extra_discount=extra_discount)
if not valid_data['is_valid']:
return ValidationError(
(_(u'Max discount for this product is %.2f%%.') %
valid_data['max_discount']))
def on_cost__icon_press(self, entry, icon_pos, event):
if icon_pos != Gtk.EntryIconPosition.PRIMARY:
return
# No need to check credentials if it is not a price
if not self.validate_price:
return
# Ask for the credentials of a different user that can possibly allow a
# bigger discount.
self.manager = run_dialog(CredentialsDialog, self.parent, self.store)
if self.manager:
self.cost.validate(force=True)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gladefile = 'SellableItemSlave'
proxy_widgets = ('quantity',
'unit_label',
'cost',
'minimum_quantity',
'stock_quantity',
'sellable_description', )
summary_label_text = None
summary_label_column = 'total'
value_column = 'cost'
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
validate_value = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
batch_selection_dialog = None
def __init__(self, store, model=None, visual_mode=None):
# This is used by add_sellable to know what item represents
# a given sellable/batch/value so it can be removed without
# needing to ask for the children class
self._items_cache = {}
super(SellableItemSlave, self).__init__(store, model=model,
visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.klist.connect('cell-edited', self._on_klist__cell_edited)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
value = self.cost.read()
storable = sellable.product_storable
order_items = []
if (storable is not None and
storable.is_batch and
self.batch_selection_dialog is not None):
order_items.extend(self._get_batch_order_items(sellable,
value, quantity))
else:
order_item = self._get_order_item(sellable, value, quantity)
if order_item is not None:
order_items.append(order_item)
for item in order_items:
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(item)
self._update_total()
if len(order_items):
self._reset_sellable()
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_remaining_quantity(self, sellable, batch=None):
"""Returns the remaining quantity in stock for the given *sellable*
This will check the remaining quantity in stock taking the
items on the list in consideration. This is very useful since
these items still haven't decreased stock.
:param sellable: the |sellable| to be checked for remaining
quantity
:param batch: if not ``None``, the remaining quantity will
be checked taking the |batch| in consideration
"""
total_quatity = sum(i.quantity for i in self.slave.klist if
(i.sellable, i.batch) == (sellable, batch))
branch = self.model.branch
storable = sellable.product_storable
# FIXME: It would be better to just use storable.get_balance_for_branch
# and pass batch=batch there. That would avoid this if
if batch is not None:
balance = batch.get_balance_for_branch(branch)
else:
balance = storable.get_balance_for_branch(branch)
return balance - total_quatity
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(value
and bool(self.proxy.model)
and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view,
Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity, batch=None):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
:param sellable: the selected |sellable|
:param value: the value selected for the sellable
:param quantity: the quantity selected for the sellable
:param batch: the batch that was selected for the sellable.
Note that this argument will only be passed if
:attr:`.batch_selection_dialog` is defined.
"""
raise NotImplementedError('This method must be defined on child')
def update_order_item(self, order_item):
"""A hook called every time the *order_item* gets updated
When adding a new item, if it's already on the list it will have
it's quantity updated (so :meth:`.get_order_item` will not be called)
This can be implemented on subclasses if they need to do
some additional action when the item gets updated.
"""
def get_saved_items(self):
raise NotImplementedError('This method must be defined on child')
def get_columns(self):
raise NotImplementedError('This method must be defined on child')
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def sellable_selected(self, sellable):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected sellable
"""
has_storable = False
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u''
unit_label = u''
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.get_unit_description()
if storable:
has_storable = True
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
else:
self.barcode.set_text('')
model = Settable(quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label)
self.proxy.set_model(model)
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
#
# Private
#
def _add_to_cache(self, order_item, sellable, value, batch):
# batch can be both the batch number or the batch object
b_key = batch if isinstance(batch, basestring) else batch.id
key = (sellable.id, b_key, value)
if key in self._items_cache:
assert self._items_cache[key] == order_item
self._items_cache[key] = order_item
def _pop_from_cache(self, sellable, value, batch):
# batch can be both the batch number or the batch object
b_key = batch if isinstance(batch, basestring) else batch.id
key = (sellable.id, b_key, value)
return self._items_cache.pop(key)
def _get_batch_items(self):
for item in self.slave.klist:
if item.batch is None:
continue
yield BatchItem(batch=item.batch, quantity=item.quantity)
def _get_batch_order_items(self, sellable, value, quantity):
order_items = []
storable = sellable.product_storable
original_batch_items = list(self._get_batch_items())
# Existing batches before running the editor. Since the user
# may remove the some batches in this dialog, we need to detect
# what was removed.
existing_batches = set(bi.batch for bi in original_batch_items)
retval = run_dialog(
self.batch_selection_dialog, self.get_parent(),
store=self.store, model=storable, quantity=quantity,
original_batches=original_batch_items)
for batch_item in retval or []:
# By removing this from the exieting batchs, at the for's end
# existing_batches will have batches that were removed
existing_batches.discard(batch_item.batch)
order_item = self._get_order_item(sellable, value,
quantity=batch_item.quantity,
batch=batch_item.batch)
if order_item is None:
continue
self._add_to_cache(order_item, sellable, value,
batch_item.batch)
order_items.append(order_item)
# If the dialog wasn't cancelled, remove the items that
# were removed on the dialog
if retval is not None:
for batch in existing_batches:
# This *needs* to be possible or else we are doing
# something very wrong here
assert self.slave.delete_button.get_visible()
item = self._pop_from_cache(sellable, value, batch)
# This is the same as clicking del button
self.slave.klist.remove(item)
return order_items
def _get_order_item(self, sellable, value, quantity, batch=None):
for item in self.slave.klist:
if item.sellable != sellable:
continue
# Some items (e.g. PurchaseItem) may not have a batch
if getattr(item, 'batch', None) != batch:
continue
# The item will only get updated if the price is the same.
# We test using hasattr first so we don't get confused if
# it doesn't have a price/cost attribute
if (hasattr(item, self.value_column) and
getattr(item, self.value_column, None) != value):
continue
# If we have a batch, we are replacing the quantity,
# since it was adjusted on batch_selection_dialog using the
# actual quantity.
if batch is not None:
item.quantity = quantity
# Else, the user is adding *more* quantity so we are going
# to sum it with the existing
else:
item.quantity += quantity
self.update_order_item(item)
return item
# If we didn't update any existing item, get a new one
return self.get_order_item(sellable, value, quantity, batch=batch)
def _setup_widgets(self):
self._update_product_labels_visibility(False)
self.quantity.set_sensitive(False)
self.cost.set_sensitive(False)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(gtk.Adjustment(lower=0, upper=sys.maxint,
step_incr=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(sysparam(self.store).COST_PRECISION_DIGITS)
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain([self.barcode,
self.quantity, self.cost,
self.add_sellable_button,
self.product_button])
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format='<b>%s</b>')
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, expand=False)
def _run_advanced_search(self, search_str=None):
supplier = None
has_supplier = hasattr(self.model, 'supplier')
if has_supplier:
supplier = self.model.supplier
table, query = self.get_sellable_view_query()
ret = run_dialog(AdvancedSellableSearch, self.get_parent(),
self.store,
table=table,
query=query,
search_str=search_str,
supplier=supplier,
hide_toolbar=not self.sellable_editable)
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(ret, (Product, ProductFullStockItemView,
ProductComponentView, SellableFullStockView,
ServiceView, ProductWithStockView)):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _get_sellable(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None
barcode = unicode(barcode, 'utf-8')
viewable, default_query = self.get_sellable_view_query()
query = viewable.barcode == barcode
if default_query:
query = And(query, default_query)
# FIXME: doing list() here is wrong. But there is a bug in one of
# the queries, that len() == 1 but results.count() == 2.
results = list(self.store.find(viewable, query))
if len(results) != 1:
return None
sellable = results[0].sellable
if not sellable:
return None
elif not self.can_add_sellable(sellable):
return
return sellable
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.proxy.set_model(None)
self.sellable_selected(None)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.barcode.set_text('')
def _update_total(self):
if self.summary:
self.summary.update_total()
self.force_validation()
def _update_product_labels_visibility(self, visible):
for widget in [self.minimum_quantity_lbl, self.minimum_quantity,
self.stock_quantity, self.stock_quantity_lbl]:
widget.set_visible(visible)
#
# Callbacks
#
def _on_klist__cell_edited(self, klist, obj, attr):
self._update_total()
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self._update_total()
def _on_list_slave__add_item(self, slave, item):
self._update_total()
def _on_list_slave__edit_item(self, slave, item):
self._update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._run_advanced_search()
def on_barcode__activate(self, widget):
sellable = self._get_sellable()
if not sellable:
search_str = unicode(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable)
self.quantity.grab_focus()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# only support positive quantities
if value <= 0:
return ValidationError(_(u'The quantity must be positive'))
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(_(u"This product unit (%s) does not "
u"support fractions.") %
sellable.get_unit_description())
storable = sellable.product_storable
if not self.validate_stock or not storable:
return
remaining_quantity = self.get_remaining_quantity(sellable)
if remaining_quantity is None:
return
if value > remaining_quantity:
return ValidationError(_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
if value <= 0:
return ValidationError(_(u'Cost must be greater than zero.'))
if self.validate_value:
client = getattr(self.model, 'client', None)
category = client and client.category
if not sellable.is_valid_price(value, category):
return ValidationError(_(u"Max discount for this product "
u"is %.2f%%") % sellable.max_discount)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gladefile = "SellableItemSlave"
proxy_widgets = ("quantity", "unit_label", "cost", "minimum_quantity", "stock_quantity", "sellable_description")
summary_label_text = None
summary_label_column = "total"
value_column = "cost"
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
#: If we should also validate the price of the sellable. (checking if it is
#: respecting the rules of discount
validate_price = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
batch_selection_dialog = None
#: if we should allow to add an item without available batches (no stock).
#: Can happen when selecting a product that control batches for decrease,
#: in that case, :meth:`.get_order_item` will receive *batch=None*
allow_no_batch = False
#: the mode to pass to the
#: :class:`stoqlib.gui.widgets.calculator.CalculatorPopup`.
#: If ``None``, the calculator will not be attached
calculator_mode = None
#: If we should add the sellable on the list when activating the barcode.
#: This is useful when the barcode is supposed to work with barcode
#: readers. Note that, if the sellable with the given barcode wasn't found,
#: it'll just be cleared and no error message will be displayed
add_sellable_on_barcode_activate = False
#: If we should make visible a label showing the stock and the minimum
#: quantity of a sellable when one is selected. Note that sellables
#: without storables (e.g. services) won't have them shown anyway
stock_labels_visible = True
def __init__(self, store, parent, model=None, visual_mode=None):
self.parent = parent
# The manager is someone who can allow a bigger discount for a sale item
self.manager = None
# This is used by add_sellable to know what item represents
# a given sellable/batch/value so it can be removed without
# needing to ask for the children class
self._items_cache = {}
super(SellableItemSlave, self).__init__(store, model=model, visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
if self.calculator_mode is not None:
self.calculator_popup = CalculatorPopup(self.cost, self.calculator_mode)
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store,
self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode,
)
self.slave.klist.connect("cell-edited", self._on_klist__cell_edited)
self.slave.connect("before-delete-items", self._on_list_slave__before_delete_items)
self.slave.connect("after-delete-items", self._on_list_slave__after_delete_items)
self.slave.connect("on-edit-item", self._on_list_slave__edit_item)
self.slave.connect("on-add-item", self._on_list_slave__add_item)
self.attach_slave("list_holder", self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
value = self.cost.read()
storable = sellable.product_storable
order_items = []
batch = self.proxy.model.batch
# If a batch_number is selected, we will add that item directly. But
# we need to adjust the batch's type since places using any
# batch selection different from BatchDecreaseSelectionDialog will
# be expecting the batch number
if batch and not issubclass(self.batch_selection_dialog, BatchDecreaseSelectionDialog):
batch = batch.batch_number
if storable is not None and storable.is_batch and batch is None and self.batch_selection_dialog is not None:
order_items.extend(self.get_batch_order_items(sellable, value, quantity))
else:
order_item = self.get_order_item(sellable, value, quantity, batch=batch)
if order_item is not None:
order_items.append(order_item)
for item in order_items:
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(item)
self.update_total()
if len(order_items):
self._reset_sellable()
# After an item is added, reset manager to None so the discount is only
# authorized for one item at a time.
self.manager = None
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_remaining_quantity(self, sellable, batch=None):
"""Returns the remaining quantity in stock for the given *sellable*
This will check the remaining quantity in stock taking the
items on the list in consideration. This is very useful since
these items still haven't decreased stock.
:param sellable: the |sellable| to be checked for remaining
quantity
:param batch: if not ``None``, the remaining quantity will
be checked taking the |batch| in consideration
:return: the remaining quantity or ``None`` if the sellable
doesn't control stock (e.g. a service)
"""
if sellable.service or sellable.product_storable is None:
return None
total_quatity = sum(i.quantity for i in self.slave.klist if (i.sellable, i.batch) == (sellable, batch))
branch = self.model.branch
storable = sellable.product_storable
# FIXME: It would be better to just use storable.get_balance_for_branch
# and pass batch=batch there. That would avoid this if
if batch is not None:
balance = batch.get_balance_for_branch(branch)
else:
balance = storable.get_balance_for_branch(branch)
return balance - total_quatity
def update_total(self):
"""Update the summary label with the current total"""
if self.summary:
self.summary.update_total()
self.force_validation()
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(value and bool(self.proxy.model) and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view, Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity, batch=None):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
:param sellable: the selected |sellable|
:param value: the value selected for the sellable
:param quantity: the quantity selected for the sellable
:param batch: the batch that was selected for the sellable.
Note that this argument will only be passed if
:attr:`.batch_selection_dialog` is defined.
"""
raise NotImplementedError("This method must be defined on child")
def get_saved_items(self):
raise NotImplementedError("This method must be defined on child")
def get_columns(self):
raise NotImplementedError("This method must be defined on child")
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def sellable_selected(self, sellable, batch=None):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected |sellable|
:param batch: the |batch|, if the |sellable| was selected
by it's batch_number
"""
has_storable = False
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u""
unit_label = u""
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.unit_description
if storable:
has_storable = True
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
model = Settable(
quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label,
batch=batch,
)
self.proxy.set_model(model)
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
def get_batch_items(self):
"""Get batch items for sellables inside this slave
:returns: a dict mapping the batch to it's quantity
"""
batch_items = collections.OrderedDict()
for item in self.slave.klist:
if item.batch is None:
continue
batch_items.setdefault(item.batch, 0)
# Sum all quantities of the same batch
batch_items[item.batch] += item.quantity
return batch_items
def get_batch_order_items(self, sellable, value, quantity):
"""Get order items for sellable considering it's |batches|
By default, this will run :obj:`.batch_selection_dialog` to get
the batches and their quantities and then call :meth:`.get_order_item`
on each one.
:param sellable: a |sellable|
:param value: the value (e.g. price, cost) of the sellable
:param quantity: the quantity of the sellable
"""
order_items = []
storable = sellable.product_storable
original_batch_items = self.get_batch_items()
if issubclass(self.batch_selection_dialog, BatchDecreaseSelectionDialog):
extra_kw = dict(decreased_batches=original_batch_items)
available_batches = list(storable.get_available_batches(self.model.branch))
# If there're no available batches (no stock) and we are allowing
# no batches, add the item without the batch.
if len(available_batches) == 0 and self.allow_no_batch:
return [self.get_order_item(sellable, value, quantity=quantity)]
# The trivial case, where there's just one batch, and since this
# is a decrease, we can select it directly
if len(available_batches) == 1:
batch = available_batches[0]
return [self.get_order_item(sellable, value, quantity=quantity, batch=batch)]
else:
extra_kw = dict(original_batches=original_batch_items)
retval = run_dialog(
self.batch_selection_dialog,
self.get_parent(),
store=self.store,
model=storable,
quantity=quantity,
**extra_kw
)
retval = retval or {}
for batch, b_quantity in retval.items():
order_item = self.get_order_item(sellable, value, quantity=b_quantity, batch=batch)
if order_item is None:
continue
order_items.append(order_item)
return order_items
def get_extra_discount(self, sellable):
"""Called to get an extra discount for the sellable being added
Subclasses can implement this to allow some extra discount for the
sellable being added. For example, one can implement this to
allow some extra discount based on the unused discount on the
already added items
Note that, if you need to get the manager to check for max discount,
you can use :obj:`.manager`
:param sellable: the sellable being added
:returns: the extra discount for the sellable being added,
or ``None`` if not extra discount should be allowed
"""
return None
#
# Private
#
def _setup_widgets(self):
self._update_product_labels_visibility(False)
self.quantity.set_sensitive(False)
self.cost.set_sensitive(False)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(gtk.Adjustment(lower=0, upper=MAX_INT, step_incr=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(sysparam.get_int("COST_PRECISION_DIGITS"))
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain(
[self.barcode, self.quantity, self.cost, self.add_sellable_button, self.product_button]
)
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(
klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format="<b>%s</b>",
)
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, expand=False)
def _run_advanced_search(self, search_str=None):
supplier = None
has_supplier = hasattr(self.model, "supplier")
if has_supplier:
supplier = self.model.supplier
table, query = self.get_sellable_view_query()
ret = run_dialog(
AdvancedSellableSearch,
self.get_parent(),
self.store,
table=table,
query=query,
search_str=search_str,
supplier=supplier,
hide_toolbar=not self.sellable_editable,
)
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(
ret,
(
Product,
ProductFullStockItemView,
ProductComponentView,
SellableFullStockView,
ServiceView,
ProductWithStockView,
),
):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
if sellable.barcode:
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _find_sellable_and_batch(self, text):
"""Find a sellable given a code, barcode or batch_number
When searching using the code attribute of the sellable, the search will
be case insensitive.
:param text: the code, barcode or batch_number
:returns: The sellable that matches the given barcode or code or
``None`` if nothing was found.
"""
viewable, default_query = self.get_sellable_view_query()
# FIXME: Put this logic for getting the sellable based on
# barcode/code/batch_number on domain. Note that something very
# simular is done on POS app
# First try barcode, then code since there might be a product
# with a code equal to another product's barcode
for attr in [viewable.barcode, viewable.code]:
query = Lower(attr) == text.lower()
if default_query:
query = And(query, default_query)
result = self.store.find(viewable, query).one()
if result:
return result.sellable, None
# if none of the above worked, try to find by batch number
query = Lower(StorableBatch.batch_number) == text.lower()
batch = self.store.find(StorableBatch, query).one()
if batch:
sellable = batch.storable.product.sellable
query = viewable.id == sellable.id
if default_query:
query = And(query, default_query)
# Make sure batch's sellable is in the view
if not self.store.find(viewable, query).is_empty():
return sellable, batch
return None, None
def _get_sellable_and_batch(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None, None
barcode = unicode(barcode, "utf-8")
sellable, batch = self._find_sellable_and_batch(barcode)
if not sellable:
return None, None
elif not self.can_add_sellable(sellable):
return None, None
return sellable, batch
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.sellable_selected(None)
def _update_product_labels_visibility(self, visible):
for widget in [self.minimum_quantity_lbl, self.minimum_quantity, self.stock_quantity, self.stock_quantity_lbl]:
widget.set_visible(self.stock_labels_visible and visible)
def _try_get_sellable(self):
"""Try to get the sellable based on the barcode typed
This will try to get the sellable using the barcode the user entered.
If one is not found, than an advanced search will be displayed for
the user, and the string he typed in the barcode entry will be
used to filter the results.
"""
sellable, batch = self._get_sellable_and_batch()
if not sellable:
if self.add_sellable_on_barcode_activate:
return
search_str = unicode(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable, batch=batch)
if self.add_sellable_on_barcode_activate and self.add_sellable_button.get_sensitive():
self._add_sellable()
else:
self.quantity.grab_focus()
#
# Callbacks
#
def _on_klist__cell_edited(self, klist, obj, attr):
self.update_total()
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self.update_total()
def _on_list_slave__add_item(self, slave, item):
self.update_total()
def _on_list_slave__edit_item(self, slave, item):
self.update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._try_get_sellable()
def on_barcode__activate(self, widget):
self._try_get_sellable()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# only support positive quantities
if value <= 0:
return ValidationError(_(u"The quantity must be positive"))
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(
_(u"This product unit (%s) does not " u"support fractions.") % sellable.unit_description
)
storable = sellable.product_storable
if not self.validate_stock or not storable:
return
remaining_quantity = self.get_remaining_quantity(sellable)
if remaining_quantity is None:
return
if value > remaining_quantity:
return ValidationError(_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
if value <= 0:
return ValidationError(_(u"Cost must be greater than zero."))
if self.validate_price:
category = getattr(self.model, "client_category", None)
default_price = sellable.get_price_for_category(category)
if not sysparam.get_bool("ALLOW_HIGHER_SALE_PRICE") and value > default_price:
return ValidationError(_(u"The sell price cannot be greater " "than %s.") % default_price)
self.manager = self.manager or api.get_current_user(self.store)
client = getattr(self.model, "client", None)
category = client and client.category
extra_discount = self.get_extra_discount(sellable)
valid_data = sellable.is_valid_price(value, category, self.manager, extra_discount=extra_discount)
if not valid_data["is_valid"]:
return ValidationError(_(u"Max discount for this product is %.2f%%." % valid_data["max_discount"]))
def on_cost__icon_press(self, entry, icon_pos, event):
if icon_pos != gtk.ENTRY_ICON_PRIMARY:
return
# No need to check credentials if it is not a price
if not self.validate_price:
return
# Ask for the credentials of a different user that can possibly allow a
# bigger discount.
self.manager = run_dialog(CredentialsDialog, self.parent, self.store)
if self.manager:
self.cost.validate(force=True)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gladefile = 'SellableItemSlave'
proxy_widgets = ('quantity',
'unit_label',
'cost',
'minimum_quantity',
'stock_quantity',
'sellable_description', )
summary_label_text = None
summary_label_column = 'total'
value_column = 'cost'
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
validate_value = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
def __init__(self, store, model=None, visual_mode=None):
super(SellableItemSlave, self).__init__(store, model=model,
visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(
self.store, self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
cost = self.cost.read()
item = self.get_order_item(sellable, cost, quantity)
if item is None:
return
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(item)
self._update_total()
self._reset_sellable()
return item
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(value
and bool(self.proxy.model)
and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view,
Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
"""
raise NotImplementedError('This method must be defined on child')
def get_saved_items(self):
raise NotImplementedError('This method must be defined on child')
def get_columns(self):
raise NotImplementedError('This method must be defined on child')
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def sellable_selected(self, sellable):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected sellable
"""
has_storable = False
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u''
unit_label = u''
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.get_unit_description()
if storable:
has_storable = True
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
else:
self.barcode.set_text('')
model = Settable(quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label)
self.proxy.set_model(model)
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
#
# Private
#
def _setup_widgets(self):
self._update_product_labels_visibility(False)
self.quantity.set_sensitive(False)
self.cost.set_sensitive(False)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(gtk.Adjustment(lower=0, upper=sys.maxint,
step_incr=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(sysparam(self.store).COST_PRECISION_DIGITS)
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain([self.barcode,
self.quantity, self.cost,
self.add_sellable_button,
self.product_button])
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format='<b>%s</b>')
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, expand=False)
def _run_advanced_search(self, search_str=None):
supplier = None
has_supplier = hasattr(self.model, 'supplier')
if has_supplier:
supplier = self.model.supplier
table, query = self.get_sellable_view_query()
ret = run_dialog(AdvancedSellableSearch, self.get_parent(),
self.store,
table=table,
query=query,
search_str=search_str,
supplier=supplier,
hide_toolbar=not self.sellable_editable)
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(ret, (Product, ProductFullStockItemView,
ProductComponentView, SellableFullStockView,
ServiceView, ProductWithStockView)):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _get_sellable(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None
barcode = unicode(barcode, 'utf-8')
viewable, default_query = self.get_sellable_view_query()
query = viewable.barcode == barcode
if default_query:
query = And(query, default_query)
# FIXME: doing list() here is wrong. But there is a bug in one of
# the queries, that len() == 1 but results.count() == 2.
results = list(self.store.find(viewable, query))
if len(results) != 1:
return None
sellable = results[0].sellable
if not sellable:
return None
elif not self.can_add_sellable(sellable):
return
return sellable
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.proxy.set_model(None)
self.sellable_selected(None)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.barcode.set_text('')
def _update_total(self):
if self.summary:
self.summary.update_total()
self.force_validation()
def _update_product_labels_visibility(self, visible):
for widget in [self.minimum_quantity_lbl, self.minimum_quantity,
self.stock_quantity, self.stock_quantity_lbl]:
widget.set_visible(visible)
#
# Callbacks
#
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self._update_total()
def _on_list_slave__add_item(self, slave, item):
self._update_total()
def _on_list_slave__edit_item(self, slave, item):
self._update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._run_advanced_search()
def on_barcode__activate(self, widget):
sellable = self._get_sellable()
if not sellable:
search_str = unicode(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable)
self.quantity.grab_focus()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# only support positive quantities
if value <= 0:
return ValidationError(_(u'The quantity must be positive'))
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(_(u"This product unit (%s) does not "
u"support fractions.") %
sellable.get_unit_description())
storable = sellable.product_storable
if (self.validate_stock and storable and
value > storable.get_balance_for_branch(self.model.branch)):
return ValidationError(_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
if value <= 0:
return ValidationError(_(u'Cost must be greater than zero.'))
if self.validate_value:
client = getattr(self.model, 'client', None)
if not sellable.is_valid_price(value, client.category):
return ValidationError(_(u"Max discount for this product "
u"is %.2f%%") % sellable.max_discount)
class SellableItemSlave(BaseEditorSlave):
"""A slave for selecting sellable items.
It defines the following:
- barcode entry
- quantity spinbutton
- cost entry
- add button
- find product button
- sellable objectlist
Optionally buttons to modify the list
- Add
- Remove
- Edit
Subclasses should define a sellable_view property and a
get_sellable_view_query, both used to define what sellables can be added
to the step.
The view used should have the following properties:
- barcode
- description
- category_description
and should also provide an acessor that returns the sellable object.
"""
gladefile = 'SellableItemSlave'
proxy_widgets = (
'quantity',
'unit_label',
'cost',
'minimum_quantity',
'stock_quantity',
'sellable_description',
)
summary_label_text = None
summary_label_column = 'total'
value_column = 'cost'
sellable_view = ProductFullStockItemView
sellable_editable = False
validate_stock = False
#: If we should also validate the price of the sellable. (checking if it is
#: respecting the rules of discount
validate_price = False
# FIXME: s/cost/value/
cost_editable = True
item_editor = None
batch_selection_dialog = None
#: If we should add the sellable on the list when activating the barcode.
#: This is useful when the barcode is supposed to work with barcode
#: readers. Note that, if the sellable with the given barcode wasn't found,
#: it'll just be cleared and no error message will be displayed
add_sellable_on_barcode_activate = False
#: If we should make visible a label showing the stock and the minimum
#: quantity of a sellable when one is selected. Note that sellables
#: without storables (e.g. services) won't have them shown anyway
stock_labels_visible = True
def __init__(self, store, parent, model=None, visual_mode=None):
self.parent = parent
# The manager is someone who can allow a bigger discount for a sale item
self.manager = None
# This is used by add_sellable to know what item represents
# a given sellable/batch/value so it can be removed without
# needing to ask for the children class
self._items_cache = {}
super(SellableItemSlave, self).__init__(store,
model=model,
visual_mode=visual_mode)
self._setup_widgets()
#
# BaseEditorSlave
#
def setup_proxies(self):
self.proxy = self.add_proxy(None, self.proxy_widgets)
def setup_slaves(self):
self.slave = AdditionListSlave(self.store,
self.get_columns(),
editor_class=self.item_editor,
klist_objects=self.get_saved_items(),
restore_name=self.__class__.__name__,
visual_mode=self.visual_mode)
self.slave.klist.connect('cell-edited', self._on_klist__cell_edited)
self.slave.connect('before-delete-items',
self._on_list_slave__before_delete_items)
self.slave.connect('after-delete-items',
self._on_list_slave__after_delete_items)
self.slave.connect('on-edit-item', self._on_list_slave__edit_item)
self.slave.connect('on-add-item', self._on_list_slave__add_item)
self.attach_slave('list_holder', self.slave)
def update_visual_mode(self):
for widget in [self.barcode, self.product_button]:
widget.set_sensitive(False)
#
# Public API
#
def add_sellable(self, sellable):
"""Add a sellable to the current step
This will call step.get_order_item to create the correct item for the
current model, and this created item will be returned.
"""
quantity = self.get_quantity()
value = self.cost.read()
storable = sellable.product_storable
order_items = []
if (storable is not None and storable.is_batch
and self.batch_selection_dialog is not None):
order_items.extend(
self.get_batch_order_items(sellable, value, quantity))
else:
order_item = self.get_order_item(sellable, value, quantity)
if order_item is not None:
order_items.append(order_item)
for item in order_items:
if item in self.slave.klist:
self.slave.klist.update(item)
else:
self.slave.klist.append(item)
self._update_total()
if len(order_items):
self._reset_sellable()
# After an item is added, reset manager to None so the discount is only
# authorized for one item at a time.
self.manager = None
def remove_items(self, items):
"""Remove items from the current :class:`IContainer`.
Subclasses can override this if special logic is necessary.
"""
for item in items:
self.model.remove_item(item)
def hide_item_addition_toolbar(self):
self.item_table.hide()
def hide_add_button(self):
"""Hides the add button
"""
self.slave.hide_add_button()
def hide_del_button(self):
"""Hides the del button
"""
self.slave.hide_del_button()
def hide_edit_button(self):
"""Hides the edit button
"""
self.slave.hide_edit_button()
def get_quantity(self):
"""Returns the quantity of the current model or 1 if there is no model
:returns: the quantity
"""
return self.proxy.model and self.proxy.model.quantity or Decimal(1)
def get_model_item_by_sellable(self, sellable):
"""Returns a model instance by the given sellable.
:returns: a model instance or None if we could not find the model.
"""
for item in self.slave.klist:
if item.sellable == sellable:
return item
def get_remaining_quantity(self, sellable, batch=None):
"""Returns the remaining quantity in stock for the given *sellable*
This will check the remaining quantity in stock taking the
items on the list in consideration. This is very useful since
these items still haven't decreased stock.
:param sellable: the |sellable| to be checked for remaining
quantity
:param batch: if not ``None``, the remaining quantity will
be checked taking the |batch| in consideration
:return: the remaining quantity or ``None`` if the sellable
doesn't control stock (e.g. a service)
"""
if sellable.service or sellable.product_storable is None:
return None
total_quatity = sum(i.quantity for i in self.slave.klist
if (i.sellable, i.batch) == (sellable, batch))
branch = self.model.branch
storable = sellable.product_storable
# FIXME: It would be better to just use storable.get_balance_for_branch
# and pass batch=batch there. That would avoid this if
if batch is not None:
balance = batch.get_balance_for_branch(branch)
else:
balance = storable.get_balance_for_branch(branch)
return balance - total_quatity
def get_parent(self):
return self.get_toplevel().get_toplevel()
def validate(self, value):
self.add_sellable_button.set_sensitive(
value and bool(self.proxy.model)
and bool(self.proxy.model.sellable))
#
# Hooks
#
def get_sellable_view_query(self):
"""This method should return a tuple containing the viewable that should
be used and a query that should filter the sellables that can and cannot
be added to this step.
"""
return (self.sellable_view,
Sellable.get_unblocked_sellables_query(self.store))
def get_order_item(self, sellable, value, quantity, batch=None):
"""Adds the sellable to the current model
This method is called when the user added the sellable in the wizard
step. Subclasses should implement this method to add the sellable to the
current model.
:param sellable: the selected |sellable|
:param value: the value selected for the sellable
:param quantity: the quantity selected for the sellable
:param batch: the batch that was selected for the sellable.
Note that this argument will only be passed if
:attr:`.batch_selection_dialog` is defined.
"""
raise NotImplementedError('This method must be defined on child')
def get_saved_items(self):
raise NotImplementedError('This method must be defined on child')
def get_columns(self):
raise NotImplementedError('This method must be defined on child')
def can_add_sellable(self, sellable):
"""Whether we can add a sellable to the list or not
This is a hook method that gets called when trying to add a
sellable to the list. It can be rewritten on child classes for
extra functionality
:param sellable: the selected sellable
:returns: True or False (True by default)
"""
return True
def sellable_selected(self, sellable):
"""This will be called when a sellable is selected in the combo.
It can be overriden in a subclass if they wish to do additional
logic at that point
:param sellable: the selected sellable
"""
has_storable = False
minimum = Decimal(0)
stock = Decimal(0)
cost = currency(0)
quantity = Decimal(0)
description = u''
unit_label = u''
if sellable:
description = "<b>%s</b>" % api.escape(sellable.get_description())
cost = getattr(sellable, self.value_column)
quantity = Decimal(1)
storable = sellable.product_storable
unit_label = sellable.get_unit_description()
if storable:
has_storable = True
minimum = storable.minimum_quantity
stock = storable.get_balance_for_branch(self.model.branch)
model = Settable(quantity=quantity,
cost=cost,
sellable=sellable,
minimum_quantity=minimum,
stock_quantity=stock,
sellable_description=description,
unit_label=unit_label)
self.proxy.set_model(model)
has_sellable = bool(sellable)
self.add_sellable_button.set_sensitive(has_sellable)
self.force_validation()
self.quantity.set_sensitive(has_sellable)
self.cost.set_sensitive(has_sellable and self.cost_editable)
self._update_product_labels_visibility(has_storable)
def get_batch_items(self):
"""Get batch items for sellables inside this slave
:returns: a sequence of
:class:`stoqlib.gui.batchselectiondialog.BatchItem`
"""
batch_items = {}
for item in self.slave.klist:
if item.batch is None:
continue
batch_items.setdefault(item.batch, 0)
# Sum all quantities of the same batch
batch_items[item.batch] += item.quantity
return [BatchItem(batch=k, quantity=v) for k, v in batch_items.items()]
def get_batch_order_items(self, sellable, value, quantity):
"""Get order items for sellable considering it's |batches|
By default, this will run :obj:`.batch_selection_dialog` to get
the batches and their quantities and then call :meth:`.get_order_item`
on each one.
:param sellable: a |sellable|
:param value: the value (e.g. price, cost) of the sellable
:param quantity: the quantity of the sellable
"""
order_items = []
storable = sellable.product_storable
original_batch_items = self.get_batch_items()
if issubclass(self.batch_selection_dialog,
BatchDecreaseSelectionDialog):
extra_kw = dict(decreased_batches=original_batch_items)
available_batches = list(
storable.get_available_batches(self.model.branch))
# The trivial case, where there's just one batch, and since this
# is a decrease, we can select it directly
if len(available_batches) == 1:
batch = available_batches[0]
return [
self.get_order_item(sellable,
value,
quantity=quantity,
batch=batch)
]
else:
extra_kw = dict(original_batches=original_batch_items)
retval = run_dialog(self.batch_selection_dialog,
self.get_parent(),
store=self.store,
model=storable,
quantity=quantity,
**extra_kw)
for batch_item in retval or []:
order_item = self.get_order_item(sellable,
value,
quantity=batch_item.quantity,
batch=batch_item.batch)
if order_item is None:
continue
order_items.append(order_item)
return order_items
#
# Private
#
def _setup_widgets(self):
self._update_product_labels_visibility(False)
self.quantity.set_sensitive(False)
self.cost.set_sensitive(False)
self.add_sellable_button.set_sensitive(False)
self.unit_label.set_bold(True)
for widget in [self.quantity, self.cost]:
widget.set_adjustment(
gtk.Adjustment(lower=0, upper=MAX_INT, step_incr=1))
self._reset_sellable()
self._setup_summary()
self.cost.set_digits(sysparam(self.store).COST_PRECISION_DIGITS)
self.quantity.set_digits(3)
self.barcode.grab_focus()
self.item_table.set_focus_chain([
self.barcode, self.quantity, self.cost, self.add_sellable_button,
self.product_button
])
self.register_validate_function(self.validate)
def _setup_summary(self):
# FIXME: Move this into AdditionListSlave
if not self.summary_label_column:
self.summary = None
return
self.summary = SummaryLabel(klist=self.slave.klist,
column=self.summary_label_column,
label=self.summary_label_text,
value_format='<b>%s</b>')
self.summary.show()
self.slave.list_vbox.pack_start(self.summary, expand=False)
def _run_advanced_search(self, search_str=None):
supplier = None
has_supplier = hasattr(self.model, 'supplier')
if has_supplier:
supplier = self.model.supplier
table, query = self.get_sellable_view_query()
ret = run_dialog(AdvancedSellableSearch,
self.get_parent(),
self.store,
table=table,
query=query,
search_str=search_str,
supplier=supplier,
hide_toolbar=not self.sellable_editable)
if not ret:
return
# We receive different items depend on if we
# - selected an item in the search
# - created a new item and it closed the dialog for us
if not isinstance(
ret,
(Product, ProductFullStockItemView, ProductComponentView,
SellableFullStockView, ServiceView, ProductWithStockView)):
raise AssertionError(ret)
sellable = ret.sellable
if not self.can_add_sellable(sellable):
return
if sellable.barcode:
self.barcode.set_text(sellable.barcode)
self.sellable_selected(sellable)
self.quantity.grab_focus()
def _find_sellable(self, code=None, barcode=None):
"""Find a sellable given a code or barcode.
When searching using the code attribute of the sellable, the search will
be case insensitive.
:returns: The sellable that matches the given barcode or code or
``None`` if nothing was found.
"""
viewable, default_query = self.get_sellable_view_query()
if barcode:
query = (Lower(viewable.barcode) == barcode.lower())
else:
query = (Lower(viewable.code) == code.lower())
if default_query:
query = And(query, default_query)
# FIXME: doing list() here is wrong. But there is a bug in one of
# the queries, that len() == 1 but results.count() == 2.
results = list(self.store.find(viewable, query))
if len(results) != 1:
return None
return results[0].sellable
def _get_sellable(self):
"""This method always read the barcode and searches de database.
If you only need the current selected sellable, use
self.proxy.model.sellable
"""
barcode = self.barcode.get_text()
if not barcode:
return None
barcode = unicode(barcode, 'utf-8')
# First search using the barcode. If the sellable was not found, then
# try using the internal code.
sellable = self._find_sellable(barcode=barcode)
if not sellable:
sellable = self._find_sellable(code=barcode)
if not sellable:
return None
elif not self.can_add_sellable(sellable):
return
return sellable
def _add_sellable(self):
sellable = self.proxy.model.sellable
assert sellable
sellable = self.store.fetch(sellable)
self.add_sellable(sellable)
self.barcode.grab_focus()
def _reset_sellable(self):
self.proxy.set_model(None)
self.sellable_selected(None)
def _update_total(self):
if self.summary:
self.summary.update_total()
self.force_validation()
def _update_product_labels_visibility(self, visible):
for widget in [
self.minimum_quantity_lbl, self.minimum_quantity,
self.stock_quantity, self.stock_quantity_lbl
]:
widget.set_visible(self.stock_labels_visible and visible)
def _try_get_sellable(self):
"""Try to get the sellable based on the barcode typed
This will try to get the sellable using the barcode the user entered.
If one is not found, than an advanced search will be displayed for
the user, and the string he typed in the barcode entry will be
used to filter the results.
"""
sellable = self._get_sellable()
if not sellable:
if self.add_sellable_on_barcode_activate:
return
search_str = unicode(self.barcode.get_text())
self._run_advanced_search(search_str)
return
self.sellable_selected(sellable)
if (self.add_sellable_on_barcode_activate
and self.add_sellable_button.get_sensitive()):
self._add_sellable()
else:
self.sellable_selected(sellable)
self.quantity.grab_focus()
#
# Callbacks
#
def _on_klist__cell_edited(self, klist, obj, attr):
self._update_total()
def _on_list_slave__before_delete_items(self, slave, items):
self.remove_items(items)
self.force_validation()
def _on_list_slave__after_delete_items(self, slave):
self._update_total()
def _on_list_slave__add_item(self, slave, item):
self._update_total()
def _on_list_slave__edit_item(self, slave, item):
self._update_total()
def on_add_sellable_button__clicked(self, button):
self._add_sellable()
def on_product_button__clicked(self, button):
self._try_get_sellable()
def on_barcode__activate(self, widget):
self._try_get_sellable()
def on_quantity__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_cost__activate(self, entry):
if self.add_sellable_button.get_sensitive():
self._add_sellable()
def on_quantity__validate(self, entry, value):
if not self.proxy.model.sellable:
return
# only support positive quantities
if value <= 0:
return ValidationError(_(u'The quantity must be positive'))
sellable = self.proxy.model.sellable
if sellable and not sellable.is_valid_quantity(value):
return ValidationError(
_(u"This product unit (%s) does not "
u"support fractions.") % sellable.get_unit_description())
storable = sellable.product_storable
if not self.validate_stock or not storable:
return
remaining_quantity = self.get_remaining_quantity(sellable)
if remaining_quantity is None:
return
if value > remaining_quantity:
return ValidationError(
_("This quantity is not available in stock"))
def on_cost__validate(self, widget, value):
sellable = self.proxy.model.sellable
if not sellable:
return
if value <= 0:
return ValidationError(_(u'Cost must be greater than zero.'))
if self.validate_price:
category = getattr(self.model, 'client_category', None)
default_price = sellable.get_price_for_category(category)
if (not sysparam(self.store).ALLOW_HIGHER_SALE_PRICE
and value > default_price):
return ValidationError(
_(u'The sell price cannot be greater'
'than %s.') % default_price)
self.manager = self.manager or api.get_current_user(self.store)
client = getattr(self.model, 'client', None)
category = client and client.category
valid_data = sellable.is_valid_price(value, category, self.manager)
if not valid_data['is_valid']:
return ValidationError(
_(u'Max discount for this product is %.2f%%.' %
valid_data['max_discount']))
def on_cost__icon_press(self, entry, icon_pos, event):
if icon_pos != gtk.ENTRY_ICON_PRIMARY:
return
# No need to check credentials if it is not a price
if not self.validate_price:
return
# Ask for the credentials of a different user that can possibly allow a
# bigger discount.
self.manager = run_dialog(CredentialsDialog, self.parent, self.store)
if self.manager:
self.cost.validate(force=True)