Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!decwrl!ucbvax!ziploc!eps
From: eps@toaster.SFSU.EDU (Eric P. Scott)
Newsgroups: comp.sys.next
Subject: Novice AppKit/IB question about Wait Cursors
Summary: How do I know when a window has finished flushing?
Message-ID: <198@toaster.SFSU.EDU>
Date: 21 Dec 89 02:56:02 GMT
Reply-To: eps@cs.SFSU.EDU (Eric P. Scott)
Organization: San Francisco State University
Lines: 48

I want to make a window with a "next" button; you click the
button, and the window is replaced on the screen by a previously
unseen window.  The transition is one-way.

 window1        window2
+--------+ +---------------+
|        | | other       ^ |
| BUTTON | |  stuff      | | (instantiated in IB)
+----|---+ +-------------|-+
     |                   |
     |  (custom object)  |
     |  outlet transitTo-/
     \->action transit:

So I say

- transit:sender
{
    [[sender window] close];
    [transitTo makeKeyAndOrderFront:sender];
    return self;
}

The thing is, window2 is pretty complicated, and it takes a
noticeable amount of time to appear.  Looks like a good place for
a wait cursor.  So I bracket the transition, and a wait cursor
flashes for an instant, then reverts to an arrow well before the
second window appears.  Then I try putting in an NXPing(); but
this doesn't seem to change anything.  The method now looks like:

- transit:sender
{
    [NXWait push];
    [[sender window] close];
    [transitTo makeKeyAndOrderFront:sender];
    NXPing();
    [NXWait pop];
    return self;
}

I tried putting [transitTo flushWindow] before the NXPing(); and
that didn't do it either.  How do I keep the wait cursor up until
the second window is flushed?  Do I have to hack this into a
windowDidBecomeKey delegate method?  (Will that even work?)

I'm sure I'm missing something obvious.

					-=EPS=-