/usr/lib/python2.7/dist-packages/sqlkit/widgets/common/sqlfilter.py is in python-sqlkit 0.9.6.1-2.
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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 | # Copyright (C) 2005--2010, Sandro Dentella <sandro@e-den.it>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
.. _filter_panel:
================
FilterPanel
================
The filter panel is the panel where all filter conditions can be written
(remeber that constraints are different in the sense that are filters
applied w/o possibility to remove them). It opens as a window separate from
the main window so that it's easy to hide or keep it at hand.
Each sqlwidget has a FilterPanel even if it doesn't show it
.. autoclass:: FilterPanel
:members: hide, show, get_tools, reload, set_page, tree, replace_column,
add_column, clear, short_filter
.. autoclass:: FilterTool
:members: set_value, get_value, set_operator, get_operator, destroy
When the filter is used from a SqlTable, the output is displayed directly
into the SqlTable. When the filter is used from a SqlMask the output is
shown in a special tab of the FilterPanel that is really a :ref:`View
<views>` on the output that can be customized to a good degree. Default
representation is ``str(obj)`` unless a you have defined a ``format``
in the :ref:`database attribute description <sqlkit_table>` for that table.
Customizing the output tab
==========================
The default representation of records is a :ref:`View <views>` with a single
column named ``__obj__`` that is a field that creates a str(obj) as
explained above.
If you want to change that representation you just need to substitute the
column in the treeview::
from sqlkit.import fields
from sqlkit.db.utils import DictLike
class CountMovies(fields.IntegerField):
'''
A field that counts the movies
'''
def clean_value(self, value):
## missing a field_name attribute on obj the objct itselt is passed
return len(value.movies)
my_mask.filter_panel.replace_column(CountMovies)
Alternatively you can :ref:`add a column <add_view_column>` to the output view
after creating the field and the column you would add it to the view as follows::
count = CountMovies('n_movies')
col = columns.VarcharColumn(t, 'n_movies', 'Movie Count', field=count)
my_mask.filter_panel.view.add_column(col)
At this point you can sort the output on each column and even get totals in it.
"""
import re
import gtk
import warnings
from datetime import *
import gobject
import sqlalchemy
from sqlalchemy.sql import select, Join, or_
from babel import dates
from sqlkit import debug as dbg, _, exc, fields
from sqlkit.db import minspect
from sqlkit.db.utils import tables, get_description, DictLike
from sqlkit.db.django_syntax import django2components
from sqlkit.misc import datetools, utils
from sqlkit.layout import layout, misc
from sqlkit.widgets.table import columns, modelproxy
import completion
FILTER_MENU = '''
<menubar name="FilterMain">
<menu action="FilterMenu">
<menuitem action="GoFilter" />
<menuitem action="GoOutput" />
<separator name="sep"/>
<menuitem action="Reload" />
<separator name="sep2"/>
<menuitem action="Close" />
</menu>
</menubar>
'''
OP_MSGID = {
'REGEXP' : _('Match as regexp'),
'match' : _('Match as LIKE, "%" automatically added'),
'ICONTAINS' : _('Match as LIKE case insensitive, "%" automatically added'),
'~' : _('Match as regexp'),
'~*' : _('Match as regexp, case insensitive'),
'!~' : _('Negation of match as regexp'),
'!~*' : _('Negation of match case insensitive'),
'=' : _('Equal'),
'!=' : _('Not equal'),
'>' : _('Greater than (after than)'),
'>=' : _('Greater or equal'),
'<' : _('Less than (before then)'),
'<=' : _('Less than or equal'),
'LIKE' : _('LIKE: a "%" means any char - case sensitive'),
'NOT LIKE' : _('Negation of LIKE'),
'ILIKE' : _('As LIKE but case insensitive'),
'NOT ILIKE' : _('Negation of ILIKE'),
'IS TRUE' : _('The boolean is True'),
'IS FALSE' : _('The boolean is False'),
'IS NOT TRUE' : _('The boolean is not True'),
'IS NOT FALSE' : _('The boolean is not False'),
'IS NULL' : _('The value is not set'),
'IS NOT NULL' : _('The value is set'),
'ID' : _("ID equality (don't follow foreign table)"),
'EMPTY OR NULL' : _("The value is NULL or empty"),
# '' : _(''),
}
class FilterPanel(object):
"""A panel that manages filter conditions of a query: number of records,
field names and output to point & click in case of a panel of a SqlMask
"""
tree = None
"""The name of an attribute that will work as grouping attribute.
The output TreeView will show records grouped by the same attribute as parent/child.
It should be improved as the parent is a the record and not a row with the only
grouping attribute.
"""
def __init__(self, master, visible=True):
"""constructor need to know who is the 'master' ie the widget (a mask
or a table instance) that will display the result.
The filter for a SqlMask has a TreeView to show the results and to easy
browse them.
"""
self.master = master
self._ids = {}
self.dont_record_display = False
handler_id = self.master.connect('delete-event', self.destroy)
self._ids['master_delete_event'] = (master, handler_id)
self.get_layout(visible=visible)
self.row = 0 # counter for position of fields
self.default_reload = True
self.search_filter_widgets = [] ## list of FilterTools instances
self.search_filter_field_names = [] ## field_names used
self.bind_name = self.master.metadata.bind.name
self.tree = False
self._last_focused_entry = None
if master.is_mask():
self._id_record_selected = master.connect('record-selected', self.record_selected_cb)
h1 = self.master.connect('record-deleted', self.record_deleted_cb)
h2 = self.master.connect('record-new', self.record_added_cb)
self._ids['master_record_selected'] = (master, self._id_record_selected)
self._ids['master_record_deleted'] = (master, h1)
self._ids['master_record_new'] = (master, h2)
self.prepare_actions()
def record_selected_cb(self, mask):
"""
callback on record selection
"""
self.select_output_path(obj=mask.current, block=True)
def record_deleted_cb(self, mask, obj):
"""
callback on record deletion
"""
path = self.get_path_for_obj(obj)
if path is not None:
self.model.remove(self.model.get_iter(path) )
def record_added_cb(self, mask):
"""
callback on record deletion
"""
try:
self.model.append([mask.current])
except:
## FIXME: I should consider also
self.model.append(None, [mask.current])
def get_layout(self, visible=True):
"""create the filter panel widget"""
if self.master.is_mask():
lay = """
{H.a {V.menu } {O.a tb=gtk-refresh ts=limit tb=gtk-close } }
{N.0 %filter
{|T.fld }
%output
{ TVS=out}
}
"""
else:
lay = """
{H.a {V.menu } {O.a tb=gtk-refresh ts=limit tb=gtk-close } }
{|T.fld }
"""
self.l = layout.Layout(lay, title=_('Filter Panel'), opts="s", label_map=self.master.label_map)
self.l.prop('Window', 'visible', visible)
self.l.prop('O.a', 'show_arrow', 'FALSE')
self.l.prop('A=.fld', 'yscale', '0')
self.l.elements['H.a'].pack_properties['y-options'] = ''
self.l.prop('O.a', 'toolbar_style', 'GTK_TOOLBAR_ICONS')
if self.master.is_mask():
## TIP: filter page of the filter panel
self.l.tip('filter', _('Add filters for your query'))
## TIP: output page of the filter panel
self.l.tip('output', _('Result page for your query'))
self.w = self.l.show(x=self.hide)
# self.w['s=limit'].set_value(self.master.limit)
adj = self.w['s=limit'].get_adjustment()
adj.set_all(self.master.limit, 0, 10000, 10, 100, 0)
self.l.connect(
('tb=gtk-close', 'clicked', self.hide),
('tb=gtk-refresh', 'clicked', self.reload_cb)
)
self.w['label-cursor'] = gtk.gdk.Cursor(gtk.gdk.HAND1)
if 'TV=out' in self.w:
self._add_treeview()
if 'N.0' in self.w:
self.w['N.0'].connect_after('switch-page', self.on_switch_page)
def _add_treeview(self):
class ObjField(fields.VarcharField):
"""
A field that represents the obj for filter_panel
"""
def clean_value(self, value):
return str(value)
field = ObjField('__obj__')
self.master.gui_fields['__obj__'] = field
col = columns.VarcharColumn(self.master, '__obj__', _('output'), field=field)
self.view = self.create_view()
self.view.add_column(col)
self.selection = self.view.treeview.get_selection()
self.selection.connect('changed',self.on_selection_changed)
def prepare_actions(self):
self.actiongroup = gtk.ActionGroup('Filter')
self.actiongroup.add_actions([
('FilterMenu', None, _('Filter actions')),
('Reload', gtk.STOCK_REFRESH, _('Reload from db'), '<Control>r', None, self.reload_cb),
('Close', gtk.STOCK_CLOSE, _('Close the panel'), '<Control>q', None, self.hide),
], )
self.actiongroup.add_actions([
('GoFilter', None, _('Go to filter panel'), '<Control>l', None, self.set_page),], 'filter')
self.actiongroup.add_actions([
('GoOutput', None, _('Go to output panel'), '<Control>o', None, self.set_page),], 'output')
self.ui_manager = gtk.UIManager()
self.accel_group = self.ui_manager.get_accel_group()
self.l.widgets['Window'].add_accel_group(self.accel_group)
self.ui_manager.insert_action_group(self.actiongroup, 10)
self.ui_manager.add_ui_from_string(FILTER_MENU)
## pack menu and toolbar if it's a toplevel
header = self.l.widgets['V.menu']
menu = self.ui_manager.get_widget('/FilterMain')
header.add(menu)
#header.add(toolbar)
def go_to_filter(self, action):
self.set_page('filter')
def replace_column(self, field_class, field_name='__obj__'):
"""
Replace the column of the output treeview with a customized one
:param field_class: a subclass of ``sqlwidget.fields.Field``
with a proper ``clean_value`` method
:param field_name: the field_name of the column, Default: ``__obj__`` (i.e. the
name used for the default column of the output treeview
"""
field = field_class(field_name)
col = columns.VarcharColumn(self.master, '__obj__', _('output'), field=field)
self.view.treeview.remove_column(self.view.tvcolumns['__obj__'])
self.view.add_column(col, 0)
self.master.gui_fields[field_name] = field
def add_column(self, field_name):
"""
Add a column among already defined fields in gui_fields
:param field_name: the field_name of the field
"""
self.view.setup_columns([field_name])
def sb(self, message, seconds=None):
"""
Write messag on the status bar
"""
self.l.sb(message, seconds=seconds)
def add_filter(self, active=True, force_=True, **kwargs):
"""
add a filter using django-like syntax
:param active: make the filter active (default True). This hides the possibility to
add a filter on a field named ``active``. In this case you can use the longer version
that is ``active__eq=True``
:param force_: force the creation of a new widget, even if one is already present
:param kwargs: any paramenter allowed per syntax of the django_like syntax as explained
in the :ref:`chapter on constraints <constraints>`
"""
for key, val in kwargs.iteritems():
path, op, op_str, value, col, join_args = django2components(self.master.mapper, {key: val})
master = self.get_related_master(self.master, path)
filter_tool = self.add(None, None, col.name, master, force=force_)
if not filter_tool:
return
filter_tool.set_active(active)
if filter_tool.is_filter_value(value):
filter_tool.set_value(value)
filter_tool.set_operator(op, value)
def get_related_master(self, master, path=None):
"""
Return the SqlTool that manages the data at 'path'.
E.g.: if the mapper is the one for movie, and the 'path' is 'genres'
as in the doc example, ``get_master`` would return the SqlTable that
manages the collection of records returned by the relation 'genres'
"""
for elem in path:
master = master.related[elem]
return master
def add(self, wdg, ev, field_name, master, after=None, show=True, force=False, value=None):
"""
add a FilterTool to the filter panel + operator and string entry
after: entry will be positioned after widget 'after'
"""
if not self.master.ui_manager.get_action('/Main/File/Filters').is_sensitive():
return
## FIXME: after and show?
search_path = "%s__%s" % ("__".join(master.relationship_path), field_name)
if not search_path in self.search_filter_field_names or force:
widget = get_filter_widget(field_name, self, master, value)
widget.search_path = search_path
self.search_filter_widgets += [ widget]
self.search_filter_field_names += [search_path]
self.set_page(name='filter')
if show:
self.w['Window'].show_all()
self.w['Window'].present()
try:
return widget
except:
return None
def set_page(self, action=None, name=None):
"""
set the tab in the filter. Tab name can be 'filter' or 'output'.
Sqlmasks only have 'filter'.
:param name: name of the tab in the filter widget: *filter* or *output*
"""
if 'N.0' in self.w:
if name == 'filter':
self.w['N.0'].set_current_page(0)
if name == 'output' and self.master.is_mask():
self.w['N.0'].set_current_page(1)
def hide(self, widget=None, event=None):
"""
Hide the Filterpanel
:param widget: not neeeded: it' here to allow using it in callback
:param event: not needed: see above
"""
self.w['Window'].set_property('visible', False)
return True # stops further processing...
def show(self):
"""
Present the filter panel
"""
self.w['Window'].present()
def get_tools(self, field_name):
"""
return a list of FilterTool for *field_name*
:param field_name: name of the field
"""
return [w for w in self.search_filter_widgets if w.field_name == field_name]
def destroy(self, window=None):
for obj, hid in self._ids.values():
obj.disconnect(hid)
del self._ids
if window:
self.w['Window'].destroy()
for attr in ('easytv', 'search_filter_widgets', 'l', 'model', 'selection', 'w'):
try:
delattr(self, attr)
except AttributeError, e:
pass
def entry_focus_cb(self, entry, event=None):
self._last_focused_entry = entry
def on_switch_page(self, notebook, junk, page_n):
if page_n == 0 and self._last_focused_entry:
gobject.idle_add(self._last_focused_entry.grab_focus)
def short_filter(self, field_name, relationship_path=None):
"""Apply a filter getting the value from the table/mask
This is a shortcut for the longer operation:
1. add a filter widget
2. set a value
3. reload
it is meant to be called from a connect in a (varchar) widget
by pressing C-M-f. It will:
1. add a filter
2. get the value for the filter from the text widget
3. set that value in the filter widget
4. disreguard the value
5. launch realod
6. disable the filter so that subsequent searches on different fields
won't be affected
"""
##FIME: possible clash of names between related objects
if relationship_path:
master = self.master.related[relationship_path[0]]
value = master.get_value(field_name)
key = "%s__%s__icontains" % (master.relationship_path[0], field_name)
else:
master = self.master
value = self.master.get_value(field_name, shown=True)
key = field_name + "__icontains"
self.add_filter(**{key : value, 'force_' : False})
tool = self.get_tools(field_name)[0]
tool.set_value(value)
tool.set_active(True)
initial_value = master.gui_fields[field_name].initial_value
master.set_value(field_name, initial_value)
self.reload()
tool.set_active(False)
##### reload & TreeView
def reload(self):
"""issue a reload operation on master. Callback of reload button"""
length = 0
if 'TV=out' in self.w:
display = False
else:
display = True
if self.default_reload:
try:
length = self.master.reload(limit=self.get_limit(), display=display )
except (exc.DialogValidationError, exc.ValidationError), e:
return
if 'TV=out' in self.w:
if length:
self.master.modelproxy.fill_model(clear=True)
self.set_page(name='output')
self.select_output_path(0, block=False)
self.view.treeview.grab_focus()
self.tv_resize()
self.view.on_zoom_fit()
else:
self.model.clear()
self.l.sb(_('Total N. of records: %s' % length))
def select_output_path(self, path=None, obj=None, block=False):
"""
Select path ``path``. If path is null and obj is not null try finding path at which is obj
:param block: block record display (when selction is already an answer to record_display)
"""
if block:
self.dont_record_display = True
if path is None and obj:
path = self.get_path_for_obj(obj)
if path is not None and len(self.model):
self.selection.select_path(path)
self.view.treeview.scroll_to_cell(path)
self.dont_record_display = False
def get_path_for_obj(self, obj):
"""
return path for object
:param obj: the object for which we neeed the path
"""
path_list = [None]
def compare(model, path, iter):
row_obj = model.get_value(iter, 0)
if row_obj == obj:
path_list[0] = path
return True
return False
self.model.foreach(compare)
return path_list[0]
def reload_cb(self, widget):
"""callback from reload button
"""
self.reload()
def set_reload(self, mapper=None, join=None, tables=None):
"""A different method to filter & select is provided
the scenario is that you have many synced sqlwidgets, you want to provide the
possibility to select a record in a table with different records in other
tables and be able to select one particular pair of them from the
filter tree.
You need to pass a join to issue the select on and a method in
actions called 'on_filter_reload' to wich is passed only an
argument: a dictionary with all the attributes of the collected
record.
If you pass tables to set_reload, each table is autoloaded and joined
to the preceding. The returned join is used.
"""
self.default_reload = False
if tables:
if isinstance(tables, str):
T = {}
tables = re.split('[ ,]+',tables)
for tbl in tables:
T[tbl] = sqlalchemy.Table(
tbl, self.master.metadata, autoload=True)
for tbl in tables[1:]:
join = T[tables[0]].join(T[tbl])
if join:
class Join(object): pass
mapper = sqlalchemy.mapper(Join, join)
self.mapper = mapper
self.map_fields = minspect.InspectMapper(mapper)
def create_view(self, field_list=None):
"""
create a sqlkit.widgets.table.column.View to represent the objects
"""
if not hasattr(self.master, 'views'):
self.master.views = utils.Container()
treeview = self.w['TV=out']
view = columns.View(master=self.master, name='filter_panel', treeview=treeview,
field_list=field_list, ro=True)
self.master.modelproxy = modelproxy.ModelProxy(self.master, treeview=treeview)
view.treeview.set_model(self.master.modelproxy.modelstore)
self.master.views['filter_panel'] = view
return view
def _get_model(self):
return self.master.modelproxy.modelstore
model = property(_get_model)
def tv_resize(self):
tv = self.w['TV=out']
tv.realize()
X, Y, width, height, bit = tv.window.get_geometry()
if height < 100:
tv.set_property('height-request', 300)
def on_selection_changed(self, *args):
# when clicking on the teeview we get 2 args: treeView, event
# when changing selection we only have 1 arg: gtk.treeSelection
# when clicking 'Refresh' we get e gtk.TreeSelection but no
# iter get selected
## first guess: we selected w/ pointer
if self.dont_record_display:
return
model, iter = self.selection.get_selected()
## we don't have a selection
if iter is None:
try:
## we moved along the treeview w/ arrows
wdg, ev = args
path = wdg.get_path_at_pos(int(ev.x), int(ev.y))[0]
iter = model.get_iter(path)
except (ValueError, TypeError), e:
## ValueError: deselecting when clicking 'reload'
## TypeError: no data in the treeview
return
if self.default_reload:
try:
idx = self.master.records.index(model.get_value(iter, 0))
except ValueError:
return
self.master.handler_block(self._id_record_selected)
self.master.record_display(index=idx)
self.master.handler_unblock(self._id_record_selected)
def clear(self):
"Destroy all filter widgets matered by this FilterPanel"
for w in list(self.search_filter_widgets):
w.destroy()
##### SQL
def get_limit(self):
"""
Get limits of the select we are issuing
"""
self.w['s=limit'].update()
return self.w['s=limit'].get_value_as_int()
def add_filter_conditions(self, query):
"""Adds to the query all filter conditions
"""
for tool in self.search_filter_widgets:
query = tool.add_filter_condition(query)
return query
def sql_dbg(self, bool_conds):
for c in bool_conds:
print "DBG: ", c.left, c.operator, c.right
class FilterTool(object):
"""
A tool that handles the the filter and provides a mean to modify the query of the
master (sqlwidget). With the FilterTool you can programmatically set the filter
active/inactive, change the operator and the filter values.
You will normally do all this with the ``.add_filter`` method of sqlwidget, but
you may occasionally need to fine tune the filter in a second time
"""
STR_STD_OPERATORS = [ 'LIKE', 'NOT LIKE', 'ILIKE', 'NOT ILIKE']
NULL_OPERATORS = [ 'IS NULL', 'IS NOT NULL' ]
STD_OPERATORS = [ '>=','<=', '=', '!=', '>', '<', ] + NULL_OPERATORS
def __init__(self, field_name, panel, master):
self.panel = panel
self.master = master
self.field_name = field_name
self.master.connect('delete-event', self.destroy)
self.db_spec = self.master.mapper_info.fields[field_name]
## db_spec['table'] may not be defined if the column correspond to an expression
if self.db_spec['table'] is not None and self.master.relationship_path:
## use an alias in case we have another filter to the same table
self.table = self.db_spec['table'].alias()
else:
self.table = self.db_spec['table']
prop = self.master.mapper.get_property(self.field_name)
cols = prop.columns
if len(cols) >= 2:
msg = """I'm not able to understand which column you want here: field_name '%s' has
several columns: %s""" % (self.field_name, prop.columns)
raise NotImplementedError(msg)
if isinstance(self.master.mapper.local_table, Join):
## FIXME: no aliasing in this case
self.col = cols[0]
else:
## Note: here self.table can be the alias of self.master.mapper_info.field[field_name].table
if self.table is not None:
self.col = self.table.c[self.field_name]
else:
## no aliasing here: is any possible to alias a _Label/expression?
self.col = self.db_spec['col']
self.bind_name = self.master.metadata.bind.name
self.widget = FilterWidget(self)
def destroy(self, window=None):
"Destroy the FilterToold and related widgets and de-register from FilterPanel"
try:
self.panel.search_filter_widgets.pop(
self.panel.search_filter_widgets.index(self))
self.panel.search_filter_field_names.pop(
self.panel.search_filter_field_names.index(self.search_path))
except AttributeError:
pass
self.widget.destroy()
del self.widget
##### handling
def is_filter_value(self, value):
"""
return True if this value can be written
This may be dependant on the FilterTool but for the moment is not.
"""
## NOTE!!! value in (False, True) is WRONG as '0 == False' is True
# and so 0 in (False,) is True!...
if value is False or value is True:
return False
return True
def set_value(self, value):
"""
set the value of the filter. It can be a string or an object (eg. a date())
"""
self.widget.set_value(value)
def get_value(self):
"""
return the current value of the filter
"""
value = self.widget.get_value()
f = self.master.gui_fields[self.field_name]
return f.clean_value(value)
def get_row_value(self):
"""
return the current value of the filter
"""
return self.widget.get_value()
def set_active(self, active):
"""make the filter active"""
self.widget.set_active(active)
def get_active(self):
"""set the filter inactive"""
return self.widget.get_active()
def set_operator(self, op, value):
"""
Set the active operator entry in ComboBox/OptionMenu for operator choice
:param op: the operator
:param value: the value of the operator
"""
self.widget.set_operator(op, value)
def get_operator(self):
"""
return the active operator entry in ComboBox/OptionMenu
"""
return self.widget.get_operator()
def get_suitable_operators(self):
"""return list of operators meaningfull for engine/data type
"""
return self.STD_OPERATORS
def string_representation(self, value):
"""
return a string representation suitable for filter entry
"""
field = self.master.gui_fields[self.field_name]
return field.get_human_value(value)
def add_filter_condition(self, query):
if not self.get_active():
return query
op_value = self.get_operator()
query = query.reset_joinpoint()
if self.master.relationship_path:
# query = query.join(*self.master.relationship_path)
if len(self.master.relationship_path) == 1:
query = query.join( (self.table, self.master.relationship_path[0]))
else:
## NOTE: if relationship_path is longer that 1, the table is
## not aliased, i.e.: if you place 2 search conditions to
## the same table (e.g. searching on staff and manager of a
## project- and both manager and staff are m2m relation to
## User) will most surely lead to no result
query = query.join(*self.master.relationship_path)
if op_value in ('IS NULL', 'IS NOT NULL', 'EMPTY OR NULL',
'IS TRUE', 'IS FALSE', 'IS NOT TRUE', 'IS NOT FALSE'):
# NULL
if op_value == 'IS NULL':
return query.filter(self.col == None)
elif op_value == 'IS NOT NULL':
return query.filter(self.col != None)
elif op_value == 'EMPTY OR NULL':
return query.filter(or_(self.col == None, self.col == ''))
# True/False
if op_value == 'IS TRUE':
return query.filter(self.col == True)
elif op_value == 'IS FALSE':
return query.filter(self.col == False)
if op_value == 'IS NOT TRUE':
return query.filter(self.col != True)
elif op_value == 'IS NOT FALSE':
return query.filter(self.col != False)
else:
try:
value = self.get_value()
except exc.ValidationError, e:
msg = _("value '%s' cannot be used for field '%s'") % (
self.get_row_value(), self.field_name)
self.master.sb(msg)
self.panel.sb(msg)
raise e
if value not in (None, ''):
if not re.match('postgres|mysql', self.bind_name) and \
op_value in ('ICONTAINS', 'MATCH') and \
not isinstance(value, list): ## value is a list in FilterEnum
op_value = 'ILIKE'
value = '%' + value + '%'
query = self._compose_field_whereclause(query, value, op_value)
return query
def _compose_field_whereclause(self, query, value, op_value):
"""
return a sql whereclause for field
"""
if op_value == "ILIKE":
return query.filter(self.col.ilike(value))
else:
return query.filter(self.col.op(op_value)(value))
def add_filter_cb(self, menuitem, event, n ):
self.panel.add(None, None, self.field_name, self.master, force=True)
def __repr__(self):
return "<%s - %s>" % (self.__class__.__name__, self.master.get_label(self.field_name))
class FilterStringTool(FilterTool):
def get_suitable_operators(self ):
STD_OPERATORS = self.STR_STD_OPERATORS + ['EMPTY OR NULL'] + self.STD_OPERATORS
if self.bind_name.startswith('postgres'):
return ['~*', '~', '!~*', '!~' ] + STD_OPERATORS
elif self.bind_name.startswith('mysql'):
return [ 'REGEXP' ] + STD_OPERATORS
else:
return ['ICONTAINS'] + STD_OPERATORS
class FilterBooleanTool(FilterTool):
def get_suitable_operators(self):
return [ 'IS TRUE', 'IS FALSE', 'IS NOT TRUE', 'IS NOT FALSE' ] + self.NULL_OPERATORS
class FilterDateTool(FilterTool):
def _compose_field_whereclause(self, query, value, op_value):
"""
Implement the mini date algebra to allow for relative dates
"""
try:
start, stop = datetools.string2dates(value)
except datetools.WrongRelativeDateFormat:
msg = _("value '%s' does not seem a valid date and cannot be transformed into a date" % value)
self.master.dialog(type='ok', icon='gtk-dialog-error', text=msg)
raise exc.ParseFilterError
# If 'stop' is not None it means I have a period (eg.: 'y > M')
# and I use operators to delimit this
# period ignoring the operator from the widget
op_value = self.get_operator()
if not stop:
query = query.filter(self.col.op(op_value)(start))
else:
## start
query = query.filter(self.col.op(">=")(start))
## stop
query = query.filter(self.col.op("<=")(stop))
return query
def get_value(self):
# no cleaning of value until in _compose_field_whereclause
return self.widget.get_value()
def string_representation(self, value):
"""
when date algebra is used we don't need to do anything
"""
if isinstance(value, date):
return FilterTool.string_representation(self, value)
else:
return value
class FilterFKeyTool(FilterTool):
def __init__(self, field_name, panel, master):
FilterTool.__init__(self, field_name, panel, master)
foreign_keys = self.master.mapper_info.fields[self.field_name]['fkey']
self.ftable, self.fcol = minspect.get_foreign_info(foreign_keys, names=False)
def get_suitable_operators(self):
if self.bind_name.startswith('postgres'):
return ['~*', '~', '!~*', '~*' ] + self.STD_OPERATORS + ['ID']
elif self.bind_name.startswith('mysql'):
return ['REGEXP' ] + self.STD_OPERATORS + ['ID']
else:
return ['ICONTAINS' ] + self.STD_OPERATORS + ['ID']
def get_value(self):
# no need to clean this value
return self.widget.get_value()
def string_representation(self, value):
"""
a boolean must be always a string
"""
return str(value)
def _compose_field_whereclause(self, query, value, op_value):
"""return a sql whereclause for field
In case field is a fkey, and the destination lookup field is not in
the mapper, it composes a subselect
"""
if op_value == 'ID':
return query.filter(self.col == value)
fdescr = get_description(self.ftable, attr='description')
if op_value == "ILIKE":
ids = select([self.fcol], self.ftable.columns[fdescr].ilike(value))
else:
ids = select([self.fcol], self.ftable.columns[fdescr].op(op_value)(value))
query = query.reset_joinpoint()
if self.master.relationship_path:
query = query.join(*self.master.relationship_path)
return query.filter(self.col.in_(ids))
class FilterEnumTool(FilterTool):
def __init__(self, field_name, panel, master):
FilterTool.__init__(self, field_name, panel, master)
def get_suitable_operators(self):
return ['~', '!~' ] + ['IS NULL', 'IS NOT NULL', 'ID']
def get_value(self):
op_value = self.get_operator()
text = self.widget.get_value()
if not text or op_value == 'ID':
return text
field = self.master.gui_fields[self.field_name]
return [key for key, val in field.column.info['values']
if re.search(text, val, re.IGNORECASE)]
def string_representation(self, value):
"""
a boolean must be always a string
"""
return str(value)
def _compose_field_whereclause(self, query, value, op_value):
"""return a sql whereclause for field
In case field is a fkey, and the destination lookup field is not in
the mapper, it composes a subselect
"""
from sqlalchemy.sql import not_
if op_value == 'ID':
return query.filter(self.col == value)
elif op_value == '~':
return query.filter(self.col.in_(value))
elif op_value == '!~':
return query.filter(not_(self.col.in_(value)))
return query
def get_filter_widget(field_name, panel, master, value=None):
"""
return an instance of a proper FilterTool according to type
"""
args = field_name, panel, master
if master.is_date(field_name) or master.is_datetime(field_name):
return FilterDateTool(*args)
elif master.is_fkey(field_name):
return FilterFKeyTool(*args)
elif master.is_enum(field_name):
return FilterEnumTool(*args)
elif master.is_boolean(field_name):
return FilterBooleanTool(*args)
elif master.is_number(field_name):
return FilterTool(*args)
else:
return FilterStringTool(*args)
# _('output') _('filter')
class FilterWidget(object):
def __init__(self, tool):
## I'd like *not* to .present the widget for any successive field added
## but I have not been able to get focus on the window w/o .present()
self.tool = tool
self.label_text = tool.master.get_label(tool.field_name)
## labels
self.field_name_event_box = gtk.EventBox()
self.field_label = gtk.Label(self.label_text)
# TIP: appears in the menu in the filter panel to add a second entry of the same field
label_str = _("Add a new filter on this field '%s'") % self.label_text.replace('_', '__')
self.field_name_event_box.set_tooltip_text(label_str)
self.check_button = gtk.CheckButton()
self.check_button.set_active(True)
#self.tool.panel.l.tooltips.set_tip(self.check_button, _("Use this filter"))
self.check_button.set_tooltip_text( _("Use this filter"))
self.field_name_event_box.add(self.field_label)
self.field_label.set_property('xalign', 0)
self.field_name_event_box.connect('button-press-event', self.tool.add_filter_cb, 1)
## combo for operator
self.operator = self.get_operator_chooser()
## get_active_text per riprenderlo...
## entry
self.field_widget = gtk.Entry()
self.field_widget.connect('focus-in-event', self.tool.panel.entry_focus_cb)
self.field_widget.connect('activate', self.tool.panel.reload_cb)
if isinstance(self.tool, FilterDateTool):
self.field_widget.connect('changed', self.date_changed_cb)
Tbl = self.tool.panel.w['T.fld']
r = self.tool.panel.row
c = 0
self.widgets = [ self.field_name_event_box, self.operator, self.check_button ]
ftype = self.tool.master.get_field_type(self.tool.field_name)
if self.tool.master.is_enum(self.tool.field_name) or not issubclass(ftype, bool):
self.widgets += [self.field_widget]
for wdg in self.widgets:
Tbl.attach(wdg, c, c+1, r, r+1, xpadding=4)
c += 1
self.tool.panel.row += 1
Tbl.show_all()
self.field_widget.grab_focus()
def get_operator_chooser(self):
"""
Build the chooser for the operator.
I used deprecated OptionMenu since ComboBox does not give the opportunity to
add tooltips
"""
operators = self.tool.get_suitable_operators()
warnings.simplefilter('ignore', DeprecationWarning)
operator = gtk.OptionMenu()
operator.set_tooltip_text(_('Click here to select an operator'))
warnings.resetwarnings()
menu = gtk.Menu()
operator.set_menu(menu)
for op in operators:
entry = gtk.MenuItem(op)
menu.append(entry)
entry.set_data('value', op)
entry.set_tooltip_text(OP_MSGID[op])
operator.set_history(0)
return operator
def destroy(self):
"Destroy all gtk widgets contained in self.widgets"
for w in self.widgets:
w.destroy()
def set_active(self, active):
self.check_button.set_active(active)
def get_active(self):
return self.check_button.get_active()
def set_operator(self, op, value):
"""
Set the active operator entry in ComboBox for operator choice
"""
operator_list = self.tool.get_suitable_operators()
if op == 'IS NULL' and value is False:
op = 'IS NOT NULL'
if op in '=' and isinstance(self.tool, FilterBooleanTool):
if value == True:
op = 'IS TRUE'
else:
op = 'IS FALSE'
try:
index = operator_list.index(op.upper())
self.operator.set_history(index)
except ValueError, e:
print "operator '%s' not available in this context" % op.upper()
print "used: %s -- list: %s" % (op, operator_list)
raise
pass
def get_operator(self):
"""
return operator set in widget
"""
return self.operator.get_menu().get_active().get_data('value')
def get_value(self):
"""
return value of filter string if any
"""
return self.field_widget.get_text()
def set_value(self, value):
"""
set string for FilterWidget
"""
self.field_widget.set_text(self.tool.string_representation(value))
def date_changed_cb(self, entry, ):
"""
date changed: show the new date and set a tooltip
"""
try:
dates_ = datetools.string2dates(entry.get_text())
except:
entry.set_tooltip_text('')
self.tool.panel.l.sb(_('incomplete date format'))
return
dates_ = [dates.format_date(d, locale=dates.default_locale()) for d in dates_ if d]
text = " - ".join(dates_)
entry.set_tooltip_text(text)
self.tool.panel.l.sb(text)
# def pop_menu(self, wdg, ev, num_button):
# print "POP_MENU", self, self.menu
# if ev.button == num_button:
# self.menu.popup(None, None, None, ev.button, ev.time )
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