Mac/Lib/test/echo.py

   1 """'echo' -- an AppleEvent handler which handles all events the same.
   2
   3 It replies to each event by echoing the parameter back to the client.
   4 This is a good way to find out how the Script Editor formats AppleEvents,
   5 especially to figure out all the different forms an object specifier
   6 can have (without having to rely on Apple's implementation).
   7 """
   8
   9 import sys
  10 sys.stdout = sys.stderr
  11 import traceback
  12 import MacOS
  13 from Carbon import AE
  14 from Carbon.AppleEvents import *
  15 from Carbon import Evt
  16 from Carbon.Events import *
  17 from Carbon import Menu
  18 from Carbon import Dlg
  19 from Carbon import Win
  20 from Carbon.Windows import *
  21 from Carbon import Qd
  22
  23 import aetools
  24 import EasyDialogs
  25
  26 kHighLevelEvent = 23                            # Not defined anywhere for Python yet?
  27
  28 def mymessage(str):
  29         err = AE.AEInteractWithUser(kAEDefaultTimeout)
  30         if err:
  31                 print str
  32         EasyDialogs.Message(str)
  33
  34 def main():
  35         echo = EchoServer()
  36         saveparams = MacOS.SchedParams(0, 0)    # Disable Python's own "event handling"
  37         try:
  38                 echo.mainloop(everyEvent, 0)
  39         finally:
  40                 apply(MacOS.SchedParams, saveparams)    # Let Python have a go at events
  41                 echo.close()
  42
  43
  44 class EchoServer:
  45
  46         #suites = ['aevt', 'core', 'reqd']
  47         suites = ['****']
  48
  49         def __init__(self):
  50                 self.active = 0
  51                 for suite in self.suites:
  52                         AE.AEInstallEventHandler(suite, typeWildCard, self.aehandler)
  53                         print (suite, typeWildCard, self.aehandler)
  54                 self.active = 1
  55                 self.appleid = 1
  56                 Menu.ClearMenuBar()
  57                 self.applemenu = applemenu = Menu.NewMenu(self.appleid, "\024")
  58                 applemenu.AppendMenu("All about echo...;(-")
  59                 applemenu.InsertMenu(0)
  60                 Menu.DrawMenuBar()
  61
  62         def __del__(self):
  63                 self.close()
  64
  65         def close(self):
  66                 if self.active:
  67                         self.active = 0
  68                         for suite in self.suites:
  69                                 AE.AERemoveEventHandler(suite, typeWildCard)
  70
  71         def mainloop(self, mask = everyEvent, timeout = 60*60):
  72                 while 1:
  73                         self.dooneevent(mask, timeout)
  74
  75         def dooneevent(self, mask = everyEvent, timeout = 60*60):
  76                         got, event = Evt.WaitNextEvent(mask, timeout)
  77                         if got:
  78                                 self.lowlevelhandler(event)
  79
  80         def lowlevelhandler(self, event):
  81                 what, message, when, where, modifiers = event
  82                 h, v = where
  83                 if what == kHighLevelEvent:
  84                         msg = "High Level Event: %s %s" % \
  85                                 (`code(message)`, `code(h | (v<<16))`)
  86                         try:
  87                                 AE.AEProcessAppleEvent(event)
  88                         except AE.Error, err:
  89                                 mymessage(msg + "\015AEProcessAppleEvent error: %s" % str(err))
  90                                 traceback.print_exc()
  91                         else:
  92                                 mymessage(msg + "\015OK!")
  93                 elif what == keyDown:
  94                         c = chr(message & charCodeMask)
  95                         if c == '.' and modifiers & cmdKey:
  96                                 raise KeyboardInterrupt, "Command-period"
  97                         MacOS.HandleEvent(event)
  98                 elif what == mouseDown:
  99                         partcode, window = Win.FindWindow(where)
 100                         if partcode == inMenuBar:
 101                                 result = Menu.MenuSelect(where)
 102                                 id = (result>>16) & 0xffff      # Hi word
 103                                 item = result & 0xffff          # Lo word
 104                                 if id == self.appleid:
 105                                         if item == 1:
 106                                                 mymessage("Echo -- echo AppleEvents")
 107                 elif what <> autoKey:
 108                         print "Event:", (eventname(what), message, when, (h, v), modifiers)
 109 ##                      MacOS.HandleEvent(event)
 110
 111         def aehandler(self, request, reply):
 112                 print "Apple Event!"
 113                 parameters, attributes = aetools.unpackevent(request)
 114                 print "class =", `attributes['evcl'].type`,
 115                 print "id =", `attributes['evid'].type`
 116                 print "Parameters:"
 117                 keys = parameters.keys()
 118                 keys.sort()
 119                 for key in keys:
 120                         print "%s: %.150s" % (`key`, `parameters[key]`)
 121                         print "      :", str(parameters[key])
 122                 print "Attributes:"
 123                 keys = attributes.keys()
 124                 keys.sort()
 125                 for key in keys:
 126                         print "%s: %.150s" % (`key`, `attributes[key]`)
 127                 aetools.packevent(reply, parameters)
 128
 129
 130 _eventnames = {
 131         keyDown: 'keyDown',
 132         autoKey: 'autoKey',
 133         mouseDown: 'mouseDown',
 134         mouseUp: 'mouseUp',
 135         updateEvt: 'updateEvt',
 136         diskEvt: 'diskEvt',
 137         activateEvt: 'activateEvt',
 138         osEvt: 'osEvt',
 139 }
 140
 141 def eventname(what):
 142         if _eventnames.has_key(what): return _eventnames[what]
 143         else: return `what`
 144
 145 def code(x):
 146         "Convert a long int to the 4-character code it really is"
 147         s = ''
 148         for i in range(4):
 149                 x, c = divmod(x, 256)
 150                 s = chr(c) + s
 151         return s
 152
 153
 154 if __name__ == '__main__':
 155         main()