/usr/lib/python2.7/dist-packages/PyQt4/uic/objcreator.py is in python-qt4 4.11.4+dfsg-2+b1.
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##
## Copyright (C) 2015 Riverbank Computing Limited.
## Copyright (C) 2006 Thorsten Marek.
## All right reserved.
##
## This file is part of PyQt.
##
## You may use this file under the terms of the GPL v2 or the revised BSD
## license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of the Riverbank Computing Limited nor the names
## of its contributors may be used to endorse or promote products
## derived from this software without specific prior written
## permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
#############################################################################
import sys
import os.path
from PyQt4.uic.exceptions import NoSuchWidgetError, WidgetPluginError
if sys.hexversion >= 0x03000000:
from PyQt4.uic.port_v3.load_plugin import load_plugin
else:
from PyQt4.uic.port_v2.load_plugin import load_plugin
# The list of directories that are searched for widget plugins. This is
# exposed as part of the API.
widgetPluginPath = [os.path.join(os.path.dirname(__file__), 'widget-plugins')]
MATCH = True
NO_MATCH = False
MODULE = 0
CW_FILTER = 1
class QObjectCreator(object):
def __init__(self, creatorPolicy):
self._cpolicy = creatorPolicy
self._cwFilters = []
self._modules = [self._cpolicy.createQtGuiWrapper()]
# Get the optional plugins.
for plugindir in widgetPluginPath:
try:
plugins = os.listdir(plugindir)
except:
plugins = []
for filename in plugins:
if not filename.endswith('.py'):
continue
filename = os.path.join(plugindir, filename)
plugin_globals = {
"MODULE": MODULE,
"CW_FILTER": CW_FILTER,
"MATCH": MATCH,
"NO_MATCH": NO_MATCH}
plugin_locals = {}
if load_plugin(filename, plugin_globals, plugin_locals):
pluginType = plugin_locals["pluginType"]
if pluginType == MODULE:
modinfo = plugin_locals["moduleInformation"]()
self._modules.append(self._cpolicy.createModuleWrapper(*modinfo))
elif pluginType == CW_FILTER:
self._cwFilters.append(plugin_locals["getFilter"]())
else:
raise WidgetPluginError("Unknown plugin type of %s" % filename)
self._customWidgets = self._cpolicy.createCustomWidgetLoader()
self._modules.append(self._customWidgets)
def createQObject(self, classname, *args, **kwargs):
# Handle regular and custom widgets.
factory = self.findQObjectType(classname)
if factory is None:
# Handle scoped names, typically static factory methods.
parts = classname.split('.')
if len(parts) > 1:
factory = self.findQObjectType(parts[0])
if factory is not None:
for part in parts[1:]:
factory = getattr(factory, part, None)
if factory is None:
break
if factory is None:
raise NoSuchWidgetError(classname)
return self._cpolicy.instantiate(factory, *args, **kwargs)
def invoke(self, rname, method, args=()):
return self._cpolicy.invoke(rname, method, args)
def findQObjectType(self, classname):
for module in self._modules:
w = module.search(classname)
if w is not None:
return w
return None
def getSlot(self, obj, slotname):
return self._cpolicy.getSlot(obj, slotname)
def asString(self, s):
return self._cpolicy.asString(s)
def addCustomWidget(self, widgetClass, baseClass, module):
for cwFilter in self._cwFilters:
match, result = cwFilter(widgetClass, baseClass, module)
if match:
widgetClass, baseClass, module = result
break
self._customWidgets.addCustomWidget(widgetClass, baseClass, module)
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