Mac/Lib/lib-toolbox/MiniAEFrame.py

   1 """MiniAEFrame - A first stab at an AE Application framework.
   2 This framework is still work-in-progress, so do not rely on it remaining
   3 unchanged.
   4 """
   5
   6 import sys
   7 import traceback
   8 import MacOS
   9 import AE
  10 from AppleEvents import *
  11 import Evt
  12 from Events import *
  13 import Menu
  14 import Win
  15 from Windows import *
  16 import Qd
  17
  18 import aetools
  19 import EasyDialogs
  20
  21 kHighLevelEvent = 23                            # Not defined anywhere for Python yet?
  22
  23 class MiniApplication:
  24         """A minimal FrameWork.Application-like class"""
  25
  26         def __init__(self):
  27                 self.quitting = 0
  28                 # Initialize menu
  29                 self.appleid = 1
  30                 self.quitid = 2
  31                 Menu.ClearMenuBar()
  32                 self.applemenu = applemenu = Menu.NewMenu(self.appleid, "\024")
  33                 applemenu.AppendMenu("All about cgitest...;(-")
  34                 applemenu.AppendResMenu('DRVR')
  35                 applemenu.InsertMenu(0)
  36                 self.quitmenu = Menu.NewMenu(self.quitid, "File")
  37                 self.quitmenu.AppendMenu("Quit")
  38                 self.quitmenu.InsertMenu(0)
  39                 Menu.DrawMenuBar()
  40
  41         def __del__(self):
  42                 self.close()
  43
  44         def close(self):
  45                 pass
  46
  47         def mainloop(self, mask = everyEvent, timeout = 60*60):
  48                 while not self.quitting:
  49                         self.dooneevent(mask, timeout)
  50
  51         def _quit(self):
  52                 self.quitting = 1
  53
  54         def dooneevent(self, mask = everyEvent, timeout = 60*60):
  55                         got, event = Evt.WaitNextEvent(mask, timeout)
  56                         if got:
  57                                 self.lowlevelhandler(event)
  58
  59         def lowlevelhandler(self, event):
  60                 what, message, when, where, modifiers = event
  61                 h, v = where
  62                 if what == kHighLevelEvent:
  63                         msg = "High Level Event: %s %s" % \
  64                                 (`code(message)`, `code(h | (v<<16))`)
  65                         try:
  66                                 AE.AEProcessAppleEvent(event)
  67                         except AE.Error, err:
  68                                 print 'AE error: ', err
  69                                 print 'in', msg
  70                                 traceback.print_exc()
  71                         return
  72                 elif what == keyDown:
  73                         c = chr(message & charCodeMask)
  74                         if c == '.' and modifiers & cmdKey:
  75                                 raise KeyboardInterrupt, "Command-period"
  76                 elif what == mouseDown:
  77                         partcode, window = Win.FindWindow(where)
  78                         if partcode == inMenuBar:
  79                                 result = Menu.MenuSelect(where)
  80                                 id = (result>>16) & 0xffff      # Hi word
  81                                 item = result & 0xffff          # Lo word
  82                                 if id == self.appleid:
  83                                         if item == 1:
  84                                                 EasyDialogs.Message("cgitest - First cgi test")
  85                                                 return
  86                                         elif item > 1:
  87                                                 name = self.applemenu.GetItem(item)
  88                                                 Qd.OpenDeskAcc(name)
  89                                                 return
  90                                 if id == self.quitid and item == 1:
  91                                         print "Menu-requested QUIT"
  92                                         self.quitting = 1
  93                 # Anything not handled is passed to Python/SIOUX
  94                 MacOS.HandleEvent(event)
  95
  96 class AEServer:
  97
  98         def __init__(self):
  99                 self.ae_handlers = {}
 100
 101         def installaehandler(self, classe, type, callback):
 102                 AE.AEInstallEventHandler(classe, type, self.callback_wrapper)
 103                 self.ae_handlers[(classe, type)] = callback
 104
 105         def close(self):
 106                 for classe, type in self.ae_handlers.keys():
 107                         AE.AERemoveEventHandler(classe, type)
 108
 109         def callback_wrapper(self, _request, _reply):
 110                 _parameters, _attributes = aetools.unpackevent(_request)
 111                 _class = _attributes['evcl'].type
 112                 _type = _attributes['evid'].type
 113
 114                 if self.ae_handlers.has_key((_class, _type)):
 115                         _function = self.ae_handlers[(_class, _type)]
 116                 elif self.ae_handlers.has_key((_class, '****')):
 117                         _function = self.ae_handlers[(_class, '****')]
 118                 elif self.ae_handlers.has_key(('****', '****')):
 119                         _function = self.ae_handlers[('****', '****')]
 120                 else:
 121                         raise 'Cannot happen: AE callback without handler', (_class, _type)
 122
 123                 # XXXX Do key-to-name mapping here
 124
 125                 _parameters['_attributes'] = _attributes
 126                 _parameters['_class'] = _class
 127                 _parameters['_type'] = _type
 128                 if _parameters.has_key('----'):
 129                         _object = _parameters['----']
 130                         del _parameters['----']
 131                         try:
 132                                 rv = apply(_function, (_object,), _parameters)
 133                         except TypeError, name:
 134                                 raise TypeError, ('AppleEvent handler misses formal keyword argument', _function, name)
 135                 else:
 136                         try:
 137                                 rv = apply(_function, (), _parameters)
 138                         except TypeError, name:
 139                                 raise TypeError, ('AppleEvent handler misses formal keyword argument', _function, name)
 140
 141                 if rv == None:
 142                         aetools.packevent(_reply, {})
 143                 else:
 144                         aetools.packevent(_reply, {'----':rv})
 145
 146 def code(x):
 147         "Convert a long int to the 4-character code it really is"
 148         s = ''
 149         for i in range(4):
 150                 x, c = divmod(x, 256)
 151                 s = chr(c) + s
 152         return s
 153
 154 class _Test(AEServer, MiniApplication):
 155         """Mini test application, handles required events"""
 156
 157         def __init__(self):
 158                 MiniApplication.__init__(self)
 159                 AEServer.__init__(self)
 160                 self.installaehandler('aevt', 'oapp', self.open_app)
 161                 self.installaehandler('aevt', 'quit', self.quit)
 162                 self.installaehandler('aevt', '****', self.other)
 163                 self.mainloop()
 164
 165         def quit(self, **args):
 166                 self._quit()
 167
 168         def open_app(self, **args):
 169                 pass
 170
 171         def other(self, _object=None, _class=None, _type=None, **args):
 172                 print 'AppleEvent', (_class, _type), 'for', _object, 'Other args:', args
 173
 174 if __name__ == '__main__':
 175         _Test()