| Another NPE and VE won't display my composite after some simple source editing. [message #610081] |
Fri, 29 July 2005 22:03 |
 Joel Kamentz
Messages: 30
Registered: July 2009 |
Member |
|
|
Discovered a case of a simple source edit which will choke VE and prevent it
from displaying the visuals for my composite.
I have a couple cases where I have a label associated with a scale control.
Scales aren't too informative by themselves, so I set up an event handler so
that a label can show the scale's value when it changes. However, I want
the label above the scale so it needs to be defined first.
Initially I use VE to define everything and get the following source code
where m_probDirs is the Scale and m_probDirsDisplay is the label:
m_probDirsDisplay = new CLabel(composite, SWT.NONE);
m_probDirsDisplay.setText("some text");
m_probDirs = new Scale(composite, SWT.NONE);
m_probDirs.setSelection(0);
m_probDirs.addSelectionListener(new
org.eclipse.swt.events.SelectionAdapter() {
public void widgetSelected(org.eclipse.swt.events.SelectionEvent
e) {
m_probDirsDisplay.setText("probability of dirs (vs. jars): "
+
m_probDirs.getSelection() + "%");
}
});
I want the label value to be correct without having to wait until the scale
is manipulated. So, I move the inital setText call after the code to create
the Scale:
m_probDirsDisplay = new CLabel(composite, SWT.NONE);
m_probDirs = new Scale(composite, SWT.NONE);
m_probDirs.setSelection(0);
m_probDirs.addSelectionListener(new
org.eclipse.swt.events.SelectionAdapter() {
public void widgetSelected(org.eclipse.swt.events.SelectionEvent
e) {
m_probDirsDisplay.setText("probability of dirs (vs. jars): "
+
m_probDirs.getSelection() + "%");
}
});
m_probDirsDisplay.setText("probability of dirs (vs. jars): " +
m_probDirs.getSelection() + "% ");
This has the added benefit of making the visual editor area display a real
value and size things better. The change works until I close and re-open
the visual editor on that class. (Might need to clean project to force a
re-parse.) Then I get the following message box:
Error trying to set new file into editor:
NPE (with no stack trace)
and some stack traces in the log (which follow later).
This seems an awfully simple change, and I would expect VE to handle it.
I can understand that visual editing might need to be an all-or-nothing
deal. But, it would be nice if there were a way to get a clue as to what
was bothering VE. I made a lucky guess and determined what the problem was.
Otherwise, here was a class I'd spent a few hours time one, primarily using
VE. I'd even made quite a few changes since that fatal source edit, without
VE complaining. I would be upsetting for VE to all-of-a-sudden tell you it
couldn't handle something which it had just been editing!
..log file contents:
!ENTRY org.eclipse.ve.java.core 4 0 2005-07-29 17:58:29.295
!MESSAGE Exception thrown.
!STACK 0
java.lang.NullPointerException
at
org.eclipse.ve.internal.swt.CompositeGraphicalEditPart.setup Control(CompositeGraphicalEditPart.java:96)
at
org.eclipse.ve.internal.swt.CompositeGraphicalEditPart.creat eChild(CompositeGraphicalEditPart.java:84)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:733)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart.setRootModel(JavaVisualEditorPart.java:506)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart.initializeViewers(JavaVisualEditorPart.java:987)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart$12.run(JavaVisualEditorPart.java:1977)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3 5)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:123)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3057)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :2716)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplicatio n.java:103)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(Pl atformActivator.java:226)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:376)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334 )
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)
!ENTRY org.eclipse.ui 4 4 2005-07-29 17:58:29.311
!MESSAGE Unhandled event loop exception
!ENTRY org.eclipse.ui 4 0 2005-07-29 17:58:29.327
!MESSAGE Failed to execute runnable (java.lang.NullPointerException)
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable
(java.lang.NullPointerException)
at org.eclipse.swt.SWT.error(SWT.java:2942)
at org.eclipse.swt.SWT.error(SWT.java:2865)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:126)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3057)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :2716)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplicatio n.java:103)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(Pl atformActivator.java:226)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:376)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334 )
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)
Caused by: java.lang.NullPointerException
at
org.eclipse.ve.internal.swt.CompositeGraphicalEditPart.setup Control(CompositeGraphicalEditPart.java:96)
at
org.eclipse.ve.internal.swt.CompositeGraphicalEditPart.creat eChild(CompositeGraphicalEditPart.java:84)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:733)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.gef.editparts.AbstractEditPart.addNotify(Abstrac tEditPart.java:232)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotif y(AbstractGraphicalEditPart.java:212)
at
org.eclipse.gef.editparts.AbstractEditPart.addChild(Abstract EditPart.java:195)
at
org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(A bstractEditPart.java:734)
at
org.eclipse.gef.editparts.AbstractEditPart.refresh(AbstractE ditPart.java:684)
at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.refresh( AbstractGraphicalEditPart.java:554)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart.setRootModel(JavaVisualEditorPart.java:506)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart.initializeViewers(JavaVisualEditorPart.java:987)
at
org.eclipse.ve.internal.java.codegen.editorpart.JavaVisualEd itorPart$12.run(JavaVisualEditorPart.java:1977)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3 5)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:123)
... 18 more
!ENTRY org.eclipse.jem.proxy 2 0 2005-07-29 17:58:29.795
!MESSAGE
+++ Warning +++: Fri Jul 29 17:58:29 EDT 2005 Project (Test1)-VM for
Test1:err>
org.eclipse.jem.internal.proxy.common.remote.CommandErrorExc eption--
Error code:7 Value data:"java.lang.NullPointerException:null"
at
org.eclipse.jem.internal.proxy.common.remote.Commands.readBa ckValue(Commands.java:1254)
at
org.eclipse.jem.internal.proxy.vm.remote.ConnectionHandler.r un(ConnectionHandler.java:454)
at
org.eclipse.jem.internal.proxy.vm.remote.CallbackHandler.cal lbackWithParms(CallbackHandler.java:150)
at
org.eclipse.ve.internal.swt.targetvm.ControlManager$5.run(Co ntrolManager.java:637)
at
org.eclipse.jem.internal.proxy.vm.remote.RemoteVMServerThrea d.doCallback(RemoteVMServerThread.java:541)
at
org.eclipse.ve.internal.swt.targetvm.ControlManager$ControlM anagerFeedbackController.run(ControlManager.java:634)
at
org.eclipse.ve.internal.swt.targetvm.ControlManager$1.run(Co ntrolManager.java:480)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3 5)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:123)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3057)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :2716)
at
org.eclipse.ve.internal.swt.targetvm.Environment$3.run(Envir onment.java:68)
|
|
|
Powered by
FUDForum. Page generated in 0.03676 seconds
] 
Search
Help
Register
Login
Home
