Re: How to end a modal run loop?

[Andreas Heppel]

Hi,
it seems like I finally found a solution to my problem below. Now, I just enter 
a loop running as long as my external task is running and within fetching all 
events and dispatching them.

while ([task isRunning])
{
NSEvent *event = [NSApp
           nextEventMatchingMask: 0xffffffff
           untilDate:[NSDate dateWithTimeIntervalSinceNow: 0.2]
           inMode:NSDefaultRunLoopMode
           dequeue:YES];
if (event)
[NSApp sendEvent: event];
};

Seems to work so far, though my application is no longer modal and the user can 
wildly click around. But I think this can be coped with much easier ;-)

Andreas

On 2002-09-10 11:12:13 +0200 Andreas Heppel <aheppel@web.de> wrote:

> Hi all,
> I have the following problem.
> My application starts an external task. The tasks progress is to be displayed 
> in a small window unsing a progress indicator. The indicator is updated using a 
> timer refiring until the external task is finished. Afterwards my application 
> is allowed to proceed further. So far so good. This is not really hard to 
> accomplish.
> My problem now is that the window has a couple of buttons. If I use [NSTask 
> waitUntilExit], the timer fires and the progress indicator proceeds but the 
> buttons in my window don't respond to mouse clicks. Thus, I start a modal 
> session for this window using [NSApplication runModalForWindow:]. This works 
> fine up to the point where the external task finishes. My timer sees this and 
> stops the modal loop [NSApplication stopModal]. Unfortunately, the procedure 
> having started the loop (and is still waiting for it to finish) does not 
> recognize this until the mouse pointer is moved into my application, i.e. the 
> application receives an event. This behaviour is absolutely inacceptable for my 
> application because it needs to proceed without any user interaction inbetween 
> (even if it is just moving the mouse pointer into the window).
> If I have understood the NSApplication/NSRunLoop/GSDisplayServer code 
> correctly, the application waits in [NSApplication runModalSession:] 
> indefinitely for an event. Only after an event occurred, it realizes that the 
> modal session has finished. Why is this so?
> Is there any other way to keep my progress window responsive to eventual mouse 
> clicks on the one hand and on the other hand have my application detect that 
> the modal session has ended (after stopModal).
>
> TIA,
> Andreas
>
>
>
> _______________________________________________
> Discuss-gnustep mailing list
> Discuss-gnustep@gnu.org
> http://mail.gnu.org/mailman/listinfo/discuss-gnustep