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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(open(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):
classType = self.findQObjectType(classname)
if classType:
return self._cpolicy.instantiate(classType, *args, **kwargs)
raise NoSuchWidgetError(classname)
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 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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