GraphUI Scene: Add custom one-time GLRunnable disposable action list, allowing to properly take-down user resources at dispose(GLAutoDrawable)

Used for UISceneDemo20 to stop and release SimpleSineSynth and its ALAudioSink.

The latter causes a bad exit (crash at OpenAL32.dll) on OpenJDK's Window Binary if not stopped!

1 files changed, 4 insertions, 0 deletions

diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo20.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo20.java
index 56aeb861c..2942dd58a 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo20.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo20.java
@@ -765,6 +765,10 @@ public class UISceneDemo20 implements GLEventListener {
         }
         if( true ) {
             final SimpleSineSynth sineSound = new SimpleSineSynth();
+            scene.addDisposeAction((final GLAutoDrawable glad) -> {
+                sineSound.stop();
+                return true;
+            } );
             sineSound.setFreq(200f);
             sineSound.setAmplitude(0.1f);
             final Button sineButton = new Button(renderModes, fontButtons, "lala", buttonRWidth, buttonRHeight);