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Insubstantial / insubstantial

Swing look-and-feel library and assorted widgets
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NullPointer in RolloverButtonListener #81

Closed PirolA closed 11 years ago

PirolA commented 12 years ago

Hello shemnon,

thanks for the efforts that you put into this project. You had already help me on some points.

I had a little break (3 months maternity leave;)

I need your help again. I often get the following message, which can not reproduce. Sometimes when hovering the mouse over different components, sometimes when starting my application, ...

For help, I would be grateful

java.lang.NullPointerException at org.pushingpixels.substance.internal.utils.RolloverButtonListener.focusGained(RolloverButtonListener.java:173) at java.awt.AWTEventMulticaster.focusGained(Unknown Source) at java.awt.Component.processFocusEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.SequencedEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

kschaefe commented 12 years ago

According to the JavaDoc MouseInfo.getPointerInfo returns null on systems without a mouse. Otherwise, I can't see how you could generate a NPE in that code.

PirolA commented 12 years ago

The error occurs on several different computers and a mouse is definitely connected. I can not explain, however, there is definitely a bug here. This should perhaps be more defensive programming to prevent the Nullpointer.

PirolA commented 11 years ago

See the bug http://java.net/jira/browse/SUBSTANCE-504