Re: windowActivated error after closing

Posted by Nathaniel Ryckman on
URL: http://imagej.273.s1.nabble.com/windowActivated-error-after-closing-tp3683771p3683772.html

I second your report.

afro wrote

Hi,
I encountered a problem: I start my plugin, then in this plugin I open Image
Sequences, modify those images, then open other Sequences (with
IJ.run("Image Sequence..."); command) etc...
After all commands have been executed I want to close all ImageWindow with
the command: WindowManager.closeAllWindows();
It works, but after I close these windows I get this error:

Exception in thread "Run$_AWT-EventQueue-0Macro$"
java.lang.NullPointerException
        at ij.gui.ImageWindow.windowActivated(ImageWindow.java:516)
        at java.awt.Window.processWindowEvent(Window.java:1877)
        at java.awt.Window.processEvent(Window.java:1823)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at
java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1850)
        at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:910)
        at
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:409)
        at java.awt.Component.dispatchEventImpl(Component.java:4502)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.SentEvent.dispatch(SentEvent.java:55)
        at
java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentEvent.dispatch(DefaultKeyboardFocusManager.java:183)
        at
java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocusManager.java:210)
        at
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:286)
        at java.awt.Component.dispatchEventImpl(Component.java:4502)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.SequencedEvent.dispatch(SequencedEvent.java:101)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)


As if it didn't closed the images, and ImageJ is still looking for them, or
what?
It says, that it want to activate an ImagePlus window via windowActivated
action. Of course this window is closed (because I closed it), so the
ImagePlus reference is null.
But how can a windowActivated action occur, if the window has been closed?

I don't understand it.
Please can someone give me some advice?
Thanks!

Joe P.