Swipe up vs Slingshot to close an app [webOS 3.x] | webOS Nation

Swipe up vs Slingshot to close an app [webOS 3.x] 6

by Adam Marks Mon, 07 Nov 2011 10:12 am EST

This tip is only for devices running webOS 3.0 and higher

Ever since webOS 1.0.1, you were always able to close an application simply by swiping the card off the top of the screen while in card view. When webOS 3.0 was released on the TouchPad, a new method of closing the application was added by pulling the app down to cause a "slingshot" effect where it would then fly up off the top of the screen. Other than the creating a fun Angry Birds slingshot sound effect easter egg, it did not appear has if this method was any different than just flicking it off the screen. However, as commented by webOS Developer Advocate Ben Combee in the webOS Developer Forum, it turns out that there is a difference for certain stock webOS apps.

For those specific apps, they are marked as "stay alive" to allow them to keep running in the background, even if you close the app by swiping up off the screen. This helps core apps like email, messaging, music and others to quickly launch when re-opened, but of course continues to also use up valuable system resources. It turns out that if you really want to completely close those apps, you can use the slingshot method.

To determine which apps are marked as "Stay Alive" you can load up Internalz Pro homebrew app and navigate to the "/etc/palm/" directory. Open up the "luna.conf" and "luna-platform.conf" files and find the "[KeepAlive]" section. According to my webOS 3.0.4 TouchPad, this includes the Phone, Email, Calendar, Messaging, Photos and Music Player apps.

Source: webOS Developer Forums


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Thanks, I always wonder what is the difference between these 2.

I wonder if this distinction is available to third-party developers to take advantage of. Can my (hypothetical) app do different things based on which method is used to close it?

I was thinking the same. this is particularly useful for apps like FB, twitter etc. Not sure if it is as simple as adding it to the conf file.

Hopefully not as devs will go crazy w/ this feature. Wont be long before our devices constantly grind to a crawl, requiring multiple daily reboots.

funny, just yesterday I saw someone commenting in the forums that he was having a problem with his touchpad slowing down or getting TMC errors or something like that, and when he called tech support they advised him to close certain apps using the slingshot method instead... he proceeded to disparage the tech support rep as an idiot for thinking it would make any difference which method he used to close an app!

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