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"""MiniAEFrame - A minimal AppleEvent Application framework.
There are two classes:
AEServer -- a mixin class offering nice AE handling.
MiniApplication -- a very minimal alternative to FrameWork.py,
only suitable for the simplest of AppleEvent servers.
"""
import sys
import traceback
import MacOS
from Carbon import AE
from Carbon.AppleEvents import *
from Carbon import Evt
from Carbon.Events import *
from Carbon import Menu
from Carbon import Win
from Carbon.Windows import *
from Carbon import Qd
import aetools
import EasyDialogs
kHighLevelEvent = 23 # Not defined anywhere for Python yet?
class MiniApplication:
"""A minimal FrameWork.Application-like class"""
def __init__(self):
self.quitting = 0
# Initialize menu
self.appleid = 1
self.quitid = 2
Menu.ClearMenuBar()
self.applemenu = applemenu = Menu.NewMenu(self.appleid, "\024")
applemenu.AppendMenu("%s;(-" % self.getaboutmenutext())
if MacOS.runtimemodel == 'ppc':
applemenu.AppendResMenu('DRVR')
applemenu.InsertMenu(0)
self.quitmenu = Menu.NewMenu(self.quitid, "File")
self.quitmenu.AppendMenu("Quit")
self.quitmenu.SetItemCmd(1, ord("Q"))
self.quitmenu.InsertMenu(0)
Menu.DrawMenuBar()
def __del__(self):
self.close()
def close(self):
pass
def mainloop(self, mask = everyEvent, timeout = 60*60):
while not self.quitting:
self.dooneevent(mask, timeout)
def _quit(self):
self.quitting = 1
def dooneevent(self, mask = everyEvent, timeout = 60*60):
got, event = Evt.WaitNextEvent(mask, timeout)
if got:
self.lowlevelhandler(event)
def lowlevelhandler(self, event):
what, message, when, where, modifiers = event
h, v = where
if what == kHighLevelEvent:
msg = "High Level Event: %s %s" % \
(`code(message)`, `code(h | (v<<16))`)
try:
AE.AEProcessAppleEvent(event)
except AE.Error, err:
print 'AE error: ', err
print 'in', msg
traceback.print_exc()
return
elif what == keyDown:
c = chr(message & charCodeMask)
if modifiers & cmdKey:
if c == '.':
raise KeyboardInterrupt, "Command-period"
if c == 'q':
if hasattr(MacOS, 'OutputSeen'):
MacOS.OutputSeen()
self.quitting = 1
return
elif what == mouseDown:
partcode, window = Win.FindWindow(where)
if partcode == inMenuBar:
result = Menu.MenuSelect(where)
id = (result>>16) & 0xffff # Hi word
item = result & 0xffff # Lo word
if id == self.appleid:
if item == 1:
EasyDialogs.Message(self.getabouttext())
elif item > 1 and hasattr(Menu, 'OpenDeskAcc'):
name = self.applemenu.GetMenuItemText(item)
Menu.OpenDeskAcc(name)
elif id == self.quitid and item == 1:
if hasattr(MacOS, 'OutputSeen'):
MacOS.OutputSeen()
self.quitting = 1
Menu.HiliteMenu(0)
return
# Anything not handled is passed to Python/SIOUX
if hasattr(MacOS, 'HandleEvent'):
MacOS.HandleEvent(event)
else:
print "Unhandled event:", event
def getabouttext(self):
return self.__class__.__name__
def getaboutmenutext(self):
return "About %s\311" % self.__class__.__name__
class AEServer:
def __init__(self):
self.ae_handlers = {}
def installaehandler(self, classe, type, callback):
AE.AEInstallEventHandler(classe, type, self.callback_wrapper)
self.ae_handlers[(classe, type)] = callback
def close(self):
for classe, type in self.ae_handlers.keys():
AE.AERemoveEventHandler(classe, type)
def callback_wrapper(self, _request, _reply):
_parameters, _attributes = aetools.unpackevent(_request)
_class = _attributes['evcl'].type
_type = _attributes['evid'].type
if self.ae_handlers.has_key((_class, _type)):
_function = self.ae_handlers[(_class, _type)]
elif self.ae_handlers.has_key((_class, '****')):
_function = self.ae_handlers[(_class, '****')]
elif self.ae_handlers.has_key(('****', '****')):
_function = self.ae_handlers[('****', '****')]
else:
raise 'Cannot happen: AE callback without handler', (_class, _type)
# XXXX Do key-to-name mapping here
_parameters['_attributes'] = _attributes
_parameters['_class'] = _class
_parameters['_type'] = _type
if _parameters.has_key('----'):
_object = _parameters['----']
del _parameters['----']
# The try/except that used to be here can mask programmer errors.
# Let the program crash, the programmer can always add a **args
# to the formal parameter list.
rv = apply(_function, (_object,), _parameters)
else:
#Same try/except comment as above
rv = apply(_function, (), _parameters)
if rv == None:
aetools.packevent(_reply, {})
else:
aetools.packevent(_reply, {'----':rv})
def code(x):
"Convert a long int to the 4-character code it really is"
s = ''
for i in range(4):
x, c = divmod(x, 256)
s = chr(c) + s
return s
class _Test(AEServer, MiniApplication):
"""Mini test application, handles required events"""
def __init__(self):
MiniApplication.__init__(self)
AEServer.__init__(self)
self.installaehandler('aevt', 'oapp', self.open_app)
self.installaehandler('aevt', 'quit', self.quit)
self.installaehandler('****', '****', self.other)
self.mainloop()
def quit(self, **args):
self._quit()
def open_app(self, **args):
pass
def other(self, _object=None, _class=None, _type=None, **args):
print 'AppleEvent', (_class, _type), 'for', _object, 'Other args:', args
if __name__ == '__main__':
_Test()
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