[Newbies] User Interrupt window

obrienj obrienj at protonmail.com
Thu Dec 14 16:30:01 UTC 2017

Hi Marcel,

I made MyToolSet, a subclass of StandardToolSet, and added a copy of #interrupt:label to it.

I next created HaltExperiment as an Object subclass and added this simple, infinite loop method:

| x |
ToolSet register:  MyToolSet.
ToolSet default:  MyToolSet.
Transcript clear. x := 0.
[x >= 0] whileTrue: [x := x + 1. Transcript show: 'x = ', x; cr.].

As a test, I commented out the code in StandardToolSet’s #interrupt:label:, which stops the User Interrupt window from appearing but also causes Squeak to freeze after typing the interrupt key. Unfortunately, running HaltExperiment new infiniteLoop didn't restore the appearance of the User Interrupt window or stop Squeak from freezing even though MyToolSet has a complete copy of #interrupt:label:.

What am I doing wrong? How do I implement MyToolSet's #interrupt:label so that a dialog window appears with its own message to the user when infiniteLoop is interrupted?


> -------- Original Message --------
> Subject: Re: [Newbies] User Interrupt window
> Local Time: December 9, 2017 9:54 AM
> UTC Time: December 9, 2017 5:54 PM
> From: marcel.taeumel at hpi.de
> To: obrienj <obrienj at protonmail.com>, beginners at lists.squeakfoundation.org
> Hi, there.
> 1) Subclass StandardToolSet.
> 2) There, implement #interrupt:label: as you want it.
> 3) Set your new tool set via "ToolSet register: MyToolSet" and "ToolSet default: MyToolSet".
> Note that ToolSet is an AppRegistry and hence a wrapper whereas StandardToolSet is an actual tool set. :-) Other app registries include WebBrowser and SoundService.
> The user interrupt is not implemented with exceptions but a watchdog process and a special semaphore. See EventSensor >> #userInterruptWatcher for more information.
> Best,
> Marcel
>> Am 09.12.2017 18:09:51 schrieb obrienj <obrienj at protonmail.com>:
>> _______________________________________________ Beginners mailing list Beginners at lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
>> Is there a way to intercept the 'User Interrupt'  window that pops up when the user types the interrupt key and replace it with a customized dialog window? I've used on: do: to intercept Error messages but can't seem to do the same with EventSensor messages.
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