# Callback when window has been closed by user **URL:** \ **Category:** How to?\ **Created:** [June 23, 2020, 8:58am UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125 "2020-06-23T08:58:42Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![andremichelle](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/andremichelle/32/145_2.png) [@andremichelle](https://openrndr.discourse.group/u/andremichelle)\ **Post date:** [June 23, 2020, 8:58am UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/1 "2020-06-23T08:58:42Z")
I have an application running that plays an audio file. I am using _net.beadsproject.beads_ to get an audio-environment. If I close the window, the audio-playback is still running, since it runs in a different thread. I have to kill the processes in Intellij. Is there a callback I can use, when the window has been closed to manually stop the audio-thread? ---
**Author:** ![abe](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/abe/32/700_2.png) [@abe](https://openrndr.discourse.group/u/abe)\ **Post date:** [June 24, 2020, 1:11pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/2 "2020-06-24T13:11:45Z")
Hi! Welcome to the forum 🙂 I see `Program.kt` has these window events: ```auto enum class WindowEventType { MOVED, RESIZED, FOCUSED, UNFOCUSED, MINIMIZED, RESTORED, } ``` Could a `CLOSE` event be added? @edwin It sounds useful to be able to clean things up… ---
**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://openrndr.discourse.group/u/edwin)\ **Post date:** [June 24, 2020, 4:48pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/3 "2020-06-24T16:48:56Z")
Ah yeah. That’s a good one. Until that’s there you can use JVM shutdown hooks. For example: [https://github.com/openrndr/openrndr/blob/master/openrndr-openal/src/main/kotlin/AudioPlayer.kt#L23](https://github.com/openrndr/openrndr/blob/master/openrndr-openal/src/main/kotlin/AudioPlayer.kt#L23) ---
**Author:** ![andremichelle](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/andremichelle/32/145_2.png) [@andremichelle](https://openrndr.discourse.group/u/andremichelle)\ **Post date:** [June 24, 2020, 6:46pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/4 "2020-06-24T18:46:11Z")
``` init { samplePlayer = SamplePlayer(context, SampleManager.sample(samplePath)) context.out.addInput(samplePlayer) Runtime.getRuntime().addShutdownHook(object : Thread() { override fun run() { println("shutdown") samplePlayer.kill() context.stop() } }) } ``` If I close the window (CMD+Q Mac), the callback will not be fired. Only if I quit the process in Intellij. ---
**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://openrndr.discourse.group/u/edwin)\ **Post date:** [June 25, 2020, 5:04pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/5 "2020-06-25T17:04:49Z")
Strange, can you double check that? JVM shutdown hooks work with all modes of termination on all platforms for me. ---
**Author:** ![andremichelle](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/andremichelle/32/145_2.png) [@andremichelle](https://openrndr.discourse.group/u/andremichelle)\ **Post date:** [June 25, 2020, 6:10pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/6 "2020-06-25T18:10:11Z")
Confirmed. I am constantly working on the project and I always have to stop the process in Intellij. The code snippets is still in there, but the console only logs “shutdown” when stopping the process manually. ---
**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://openrndr.discourse.group/u/edwin)\ **Post date:** [June 25, 2020, 8:12pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/7 "2020-06-25T20:12:51Z")
That sounds like there may be a non-daemon thread running that prevents the JVM from shutdown. ---
**Author:** ![andremichelle](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/andremichelle/32/145_2.png) [@andremichelle](https://openrndr.discourse.group/u/andremichelle)\ **Post date:** [June 26, 2020, 4:47am UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/8 "2020-06-26T04:47:15Z")
Maybe it is connected to the Driver I am using. ``` private val context: AudioContext = AudioContext( JavaSoundAudioIO(512), 512, IOAudioFormat(44100.0f, 16, 0, 2) ) ``` I am happy to try any other option to play wav-files in openrndr. ---
**Author:** ![ricardo](https://yyz2.discourse-cdn.com/free1/user_avatar/openrndr.discourse.group/ricardo/32/8_2.png) [@ricardo](https://openrndr.discourse.group/u/ricardo)\ **Post date:** [June 29, 2020, 3:35pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/9 "2020-06-29T15:35:23Z")
The shutdown hook never runs, because it’s waiting for the sample player thread to “finish”. I don’t think there’s a way around it till there’s a `window closed` life-cycle event. ---
**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://openrndr.discourse.group/u/edwin)\ **Post date:** [June 30, 2020, 6:57pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/10 "2020-06-30T18:57:19Z")
I made Beads play sound using OPENRNDR’s OpenAL sound interface a good while ago. Sort of an abandoned codebase: [https://github.com/edwinRNDR/pellet/blob/master/src/main/kotlin/org/openrndr/pellet/Pellet.kt](https://github.com/edwinRNDR/pellet/blob/master/src/main/kotlin/org/openrndr/pellet/Pellet.kt) ---
**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://openrndr.discourse.group/u/edwin)\ **Post date:** [June 30, 2020, 9:23pm UTC](https://openrndr.discourse.group/t/callback-when-window-has-been-closed-by-user/125/11 "2020-06-30T21:23:55Z")
I just submitted code that addresses [https://github.com/openrndr/openrndr/issues/126](https://github.com/openrndr/openrndr/issues/126)