Re: Launched window not activating

FROM : j o a r
DATE : Mon Apr 11 20:59:10 2005

I wouldn't use a thread for this purpose alone - it doesn't smell right.

I would assume that you perform the open+download+close operation in 
one event loop? that is probably why the window doesn't behave like 
you would expect. Try to just launch your download operation on a 
timer. Something like this:

- (void) myConnectionCallback:(id) sender
{
    [self doTheStuffToOpenTheWindow];

    [self performSelector: @selector(runDownloadOperation) 
withObject: nil afterDelay: 0.0];
}

- (void) runDownloadOperation
{
    // do whatever you do when you download

    [myWindow close];
}

And, if the download operation is a long one (long == more than 1 - 2 
second), you should probably place it on a thread, in which case this 
trick with the timer won't be necessary at all. Having the download 
operation on a thread seems like a much better design than the other 
way around. Try to keep all UI operations on the main thread, and all 
other lengthy operations on secondary threads.

j o a r


On 11 apr 2005, at 20.31, Ken Tozier wrote:

> Thanks Lorenzo. Threading did the trick!
>
> I'm a little confused as to why threading is necessary though. Is 
> it always required to open nib files other than the main nib inside 
> their own thread? If not, why was it necessary for this instance. 
> I'm not doing anything fancy inside my code, just opening a window 
> with [NSWindowController initWithWindowNibName:@"nibName" owner: 
> self];
>
> Do you know if there is any documentation that spells out these 
> types of hidden gotchas?
>