Re: Event Handler reply

Den 1. nov.. 2007 kl. 13:13 skrev Ivan C Myrvold:

I have this event handler registered in my application:

[[NSAppleEventManager sharedAppleEventManager] setEventHandler:self andSelector:@selector(handleGetExtensionPreferencesIDEvent:withReplyEvent:) forEventClass:kTansaCoreEventClass andEventID:kGetExtensionPreferencesID];

and the handler routine itself:

- (void) handleGetExtensionPreferencesIDEvent:(NSAppleEventDescriptor *)event withReplyEvent:(NSAppleEventDescriptor *)replyEvent {
[replyEvent setParamDescriptor:[[NSAppleEventDescriptor descriptorWithString:@""] coerceToDescriptorType:'TEXT'] forKeyword:keyDirectObject];
AppleEvent *replyEventPtr = (AEDesc *)[replyEvent aeDesc];
if (replyEventPtr)
AESendMessage(replyEventPtr, NULL, kAENoReply, kAEDefaultTimeout);
}

I get the AppleEvent TANS/tgep from the client application, and am supposed to reply to it.
The aevt/ansr I return in the replyEvent looks almost correct.
But instead of { 2 } 'aevt':  aevt/ansr (i386) there should have been { 1 } 'aevt':  aevt/ansr (i386)
And instead of reply port: 26883 (0x6903) there should have been reply port: 0 (0x0)
etc.
The complete correct reply is shown at the bottom of this message, taken from an older Carbon application I am porting to Cocoa.
I am thinking that I am returning the replyEvent in a wrong way, should I return it in an AESendMessage?
I will be very grateful for any help here.

Ivan

------oo end of event oo------
AE2000 (5007): Received an event:
------oo start of event oo------
{ 1 } 'aevt': TANS/tgep (i386){
return id: 220135528 (0xd1f0068)
   transaction id: 0 (0x0)
interaction level: 112 (0x70)
   reply required: 1 (0x1)
   remote: 0 (0x0)
for recording: 0 (0x0)
   reply port: 26883 (0x6903)
target:
{ 1 } 'psn ': 8 bytes {
{ 0x0, 0xd80d8 } (InCopy)
}
fEventSourcePSN: { 0x0,0xd80d8 } (InCopy)
optional attributes:
< empty record >
event data:
{ 1 } 'aevt': - 0 items {
}
}

------oo end of event oo------
AE2000 (5007): Sending an event:
------oo start of event oo------
{ 2 } 'aevt': aevt/ansr (i386){
return id: 220135528 (0xd1f0068)
   transaction id: 0 (0x0)
interaction level: 112 (0x70)
   reply required: 0 (0x0)
   remote: 0 (0x0)
for recording: 0 (0x0)
   reply port: 26883 (0x6903)
target:
{ 2 } 'psn ': 8 bytes {
{ 0x0, 0xd80d8 } (InCopy)
}
fEventSourcePSN: { 0x0,0xfa0fa } (Tansa)
optional attributes:
< empty record >
event data:
{ 2 } 'aevt': - 1 items {
key '----' -
{ 1 } 'TEXT': 0 bytes {
""
}
}
}

This is how the reply should have looked like (if you disregard the return id):

------oo end of event oo------
AE2000 (3359): Received an event reply:
------oo start of event oo------
{ 1 } 'aevt': aevt/ansr (i386){
   return id: 220135439 (0xd1f000f)
   transaction id: 0 (0x0)
  interaction level: 112 (0x70)
   reply required: 0 (0x0)
   remote: 0 (0x0)
   for recording: 0 (0x0)
   reply port: 0 (0x0)
  target:
   { 1 } 'psn ': 8 bytes {
   { 0x0, 0xd90d9 } (Tansa)
   }
  fEventSourcePSN: { 0x0,0xd90d9 } (Tansa)
  optional attributes:
   < empty record >
  event data:
   { 1 } 'aevt': - 1 items {
   key '----' -
   { 1 } 'TEXT': 0 bytes {
   ""
   }
   }
}

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References:
	>Event Handler reply (From: Ivan C Myrvold <email@hidden>)