Re: Continue application processing with mouse down on a menu
Re: Continue application processing with mouse down on a menu
- Subject: Re: Continue application processing with mouse down on a menu
- From: Programmingkid <email@hidden>
- Date: Sat, 26 Sep 2015 17:28:48 -0400
On Sep 26, 2015, at 3:19 PM, Jens Alfke wrote:
>
>> On Sep 26, 2015, at 11:19 AM, Programmingkid <email@hidden> wrote:
>>
>> I just wish there were an easy way for the a task on the main thread to continue to work even if the user is looking at a menu. Using multiple threads has a lot of problems associated with it.
>
> Well, it kind of goes without saying that if you want to do multiple independent tasks at the same time, you need multiple threads.
>
> The event-loop-based model used by AppKit/UIKit is a way of taming some of the complexity of threads, by using a cooperative scheduling model for UI tasks. I’ve worked on GUI frameworks that allowed any thread to do anything at any time, and deadlocks and race conditions were constant problems.
>
> But anyway, if you’ve got a main-thread task that does its work incrementally via a timer or whatnot, it can continue to work while a menu is active as long as you use the correct runloop mode.
>
> —Jens
What is the right runloop mode to use?
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