NPE in TooltipPainter (caused by concurrent event-handling / rendering)

[Mike Hogye]

At a couple of places in TimePlotInfoImpl, we do setIcon(null). One or more of these can end up running on the event thread (which, with NEWT, is probably not the same as the rendering thread). If one of these setIcon() calls happens while the render thread is in the middle of TooltipPainter.paintTo(), you end up with:

Exception in thread "main-AWTAnimator" java.lang.NullPointerException

at com.metsci.glimpse.painter.info.TooltipPainter.paintTo(TooltipPainter.java:459)

at com.metsci.glimpse.painter.base.GlimpsePainterImpl.paintTo(GlimpsePainterImpl.java:104)

at com.metsci.glimpse.layout.GlimpseLayoutDelegate.paintTo(GlimpseLayoutDelegate.java:170)

at com.metsci.glimpse.layout.GlimpseLayout.paintTo(GlimpseLayout.java:449)

at com.metsci.glimpse.layout.GlimpseLayoutDelegate.paintTo(GlimpseLayoutDelegate.java:170)

at com.metsci.glimpse.layout.GlimpseLayout.paintTo(GlimpseLayout.java:449)

at com.metsci.glimpse.canvas.NewtSwingGlimpseCanvas$1.display(NewtSwingGlimpseCanvas.java:155)

at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:649)

at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:633)

at jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:399)

at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1103)

at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:978)

at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:605)

at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:75)

at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:416)

at com.jogamp.opengl.util.Animator$MainLoop.run(Animator.java:188)

at java.lang.Thread.run(Thread.java:724)

[Geoffrey Ulman]

This has been fixed in glimpse-prerelease in the jogl2.1.2 branch (really simple approach which just synchronizes all the painter's getter/setter methods and the paintTo method).