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From: preston@LL.MIT.EDU (Steven Preston)
Newsgroups: comp.sys.next
Subject: Re: NeXTstep programming question
Message-ID: <9101180951.AA06903@LL.MIT.EDU>
Date: 18 Jan 91 14:51:46 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 30

In article <1048@nada.cs.utexas.edu> garnett@cs.utexas.edu (John William Garnett) writes:
>I have used IB to create a window with a slider object.  I have been
>able to connect the output of the slider to a custom object.  What I
>would like to be able to do is be able to detect each mouseDown event
>that corresponds to the beginning of a movement of the slider.
>Similarly, I wish to be able to detect the mouseUp event that
>signifies the end of a given slider movement.

You can obtain the event that caused the slider to send its message
using this code inside your custom object target method:

    NXEvent *ev;
    int event_type;
    ...
    ev = [NXApp currentEvent];
    event_type = ev->type;
    switch (event_type)
    {
     case NX_LMOUSEDOWN:
      ...
      break;
     case NX_LMOUSEDRAGGED:
      ...
      break;
    }

There are also many other Application methods for obtaining or peeking
at the next event.  See the appkit/Application.h or the class specs.
--
Steve Preston