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laydi/laydi/main.py

102 lines
2.3 KiB
Python

import sys
import os.path
import paths
# Site specific directories set by configure script.
PREFIX = paths.PREFIX
BINDIR = paths.BINDIR
DATADIR = paths.DATADIR
DOCDIR = paths.DOCDIR
PYDIR = paths.PYDIR
ICONDIR = os.path.join(DATADIR, 'icons')
#: Dictionary of observers
_observers = {}
#: The current Navigator object.
navigator = None
#: The current application
application = None
#: The current projectview
projectview = None
#: The current workflow
workflow = None
#: A cfgparse/optparse options object.
options = None
def notify_observers(name):
call = "%s_changed" % name
for s in _observers.get(name, []):
getattr(s, call)(getattr(sys.modules[__name__], name))
def _add_observer(name, observer):
"""Adds observer as an observer of the named object."""
if not _observers.has_key(name):
_observers[name] = []
_observers[name].append(observer)
def _remove_observer(name, observer):
"""Removes observer as an observer of the named object."""
if not _observers.has_key(name):
return
_observers.remove(observer)
def add_navigator_observer(observer):
_add_observer('navigator', observer)
def add_project_observer(observer):
_add_observer('project', observer)
def add_workflow_observer(observer):
_add_observer('workflow', observer)
def add_application_observer(observer):
_add_observer('application', observer)
def remove_navigator_observer(observer):
_remove_observer('navigator', observer)
def remove_project_observer(observer):
_remove_observer('project', observer)
def remove_workflow_observer(observer):
_remove_observer('workflow', observer)
def remove_application_observer(observer):
_remove_observer('application', observer)
def remove_options_observer(observer):
_remove_observer('options', observer)
def set_navigator(nav):
global navigator
navigator = nav
notify_observers('navigator')
def set_application(app):
global application
application = app
notify_observers('application')
def set_projectview(p):
global projectview
projectview = p
notify_observers('project')
def set_workflow(wf):
global workflow
workflow = wf
notify_observers('workflow')
def set_options(opt):
global options
options = opt
notify_observers('options')