[Repast-developer] [ repast-Bugs-1241755 ] Adding DisplaySurface fails before displayable is added

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Bugs item #1241755, was opened at 2005-07-20 18:07
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Reuben Grinberg (reubgr)
Assigned to: Nobody/Anonymous (nobody)
Summary: Adding DisplaySurface fails before displayable is added

Initial Comment:
Adding a DisplaySurface to a Containter (such as a JPanel) before a 
Displayable has been added to the DisplaySurface leads a 
NullPointerException since the Painter has never been set.
java.lang.NullPointerException
        at uchicago.src.sim.gui.Painter.createBufferedImage(Unknown 
Source)
        at uchicago.src.sim.gui.LocalPainter.paint(Unknown Source)
        at uchicago.src.sim.gui.DisplaySurface$DUpdate.run(Unknown 
Source)
        at java.awt.event.InvocationEvent.dispatch
(InvocationEvent.java:171)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy
(EventDispatchThread.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEvents
(EventDispatchThread.java:178)
        at java.awt.EventDispatchThread.pumpEvents
(EventDispatchThread.java:170)
        at java.awt.EventDispatchThread.run
(EventDispatchThread.java:100)

In addition, since DisplaySurface doesn't seem to add displayables 
via the normal Container.add() mechanism, I can't call 
myDisplaySurface.getComponentCount() as a work around. This also 
means that I can't add a Container listener to the DisplaySurface to 
know when a Displayable has been added.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=101703&aid=1241755&group_id=1703