[NXApp run]

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3 total messages Started by Bill Shirley [CSC] Tue, 25 Aug 1992 14:20

#786

Author: Bill Shirley [CSC]
Date: Tue, 25 Aug 1992 14:20

39 lines
1723 bytes

Does the -run method of Application NEED to be invoked.

I need a little bit more control over the event loop.

(NO, I didn't design it poorly, I didn't design it. I am trying
 to integrate an old program into a NeXTSTEP environment.)

The program I'm trying to write a front end for (it was command line)
calls a function that is equivalent to getc, and this function needs
to return a character, probably dispatching other events while waiting
for the character to come in.

It's easy to get an event, but if I didn't wan't it how can I dispatch
it?

there's [NXApp getEvent: mask: threshhold:]
	(I don't have my manuals in front of me and I know
	that's wrong but you get the gist)

Ok, I can limit the events to KEYPRESS, but what if it's a command-key
or a control-key, or alt-key,...

Is there a way to dispatch these event's that I didn't want to get?
Should I peek and then take?

Is it ok never to call [NXApp run] and deal with all your events otherwise?

It would be nice if there was an [NXApp dispatch:event].

pondering...

-- 
Bill Shirley		|  ``Computer Science is not about computers any 
shirley@fdr.jsc.nasa.gov|	more than astronomy is about telescopes.''

-- 
Bill Shirley		|  ``Computer Science is not about computers any 
shirley@fdr.jsc.nasa.gov|	more than astronomy is about telescopes.''

Re: [NXApp run]

#884

Author: John Jay Feiler
Date: Fri, 28 Aug 1992 06:18

23 lines
1399 bytes

In article <1992Aug25.092051@fdr.jsc.nasa.gov> shirley@fdr.jsc.nasa.gov (Bill  
Shirley [CSC]) writes:
> 
> Does the -run method of Application NEED to be invoked.
> 
> I need a little bit more control over the event loop.
> 
> (NO, I didn't design it poorly, I didn't design it. I am trying
>  to integrate an old program into a NeXTSTEP environment.)
> 
> The program I'm trying to write a front end for (it was command line)
> calls a function that is equivalent to getc, and this function needs
> to return a character, probably dispatching other events while waiting
> for the character to come in.

What about doing a DPSAddFD on the file descriptor of whatever you are  
"getc"ing from.  The  you can still use -run, and your getc stuff will be  
checked once every "run" event loop.


> -- 
> Bill Shirley		|  ``Computer Science is not about computers any 
> shirley@fdr.jsc.nasa.gov|	more than astronomy is about telescopes.''

Re: [NXApp run]

#954

Author: Jim Large
Date: Mon, 31 Aug 1992 14:30

42 lines
1713 bytes

In article <1992Aug25.092051@fdr.jsc.nasa.gov> shirley@fdr.jsc.nasa.gov (Bill  
Shirley [CSC]) writes:
> 
> Does the -run method of Application NEED to be invoked.
> I need a little bit more control over the event loop.

  I've found that some desirable things happen when -[Application run] is
called.  The only one I know about for sure is that the application's icon
(which is highlighted when you launch the app) becomes unhighlighted.

  That's why I did the following when I had to port an alien program to
NeXTStep:

@interface Controller:Object
@end

@implementation Controller
- appDidInit:sender {
    [NXApp stop];
    return self;
    }
@end

void main(
  int argc,
  char *argv[]
  )
  /*main*/ {
    NXApp = ...
    ...
    [NXApp setDelegate:[[Controller alloc] init]];
    [NXApp run];
    while( 1 )
      /*main loop*/ {
        ...
      /*main loop*/ }
  /*main*/ }

----------------+------------------+------------------------------------
     |\ /|      |  Jim Large       |  Visual Understanding Systems, Inc.
     | V |      |  jml@visus.com   |  2100 Wharton St.                  
   \_|   |__    |  (412)488-3600   |  Pittsburgh, PA  15203

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