Cannot open GWT classes with GWT Designer

[Jordan Reynolds]

I am using the GWT plugin along with GWT Designer on Eclipse 3.6. I
get the following error when trying to switch from "Source" to
"Design" view in GWT Designer:

Any suggestion would be greatly appreciated!

java.lang.NoSuchMethodError:
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.getCSSFiles()Ljava/
util/List;
at
com.google.gdt.eclipse.designer.gxt.parser.ClassLoaderValidator.hasRequiredStyles(ClassLoaderValidator.java:
89)
at
com.google.gdt.eclipse.designer.gxt.parser.ClassLoaderValidator.validate(ClassLoaderValidator.java:
45)
at
com.google.gdt.eclipse.designer.parser.ParseFactory.validate(ParseFactory.java:
465)
at
com.google.gdt.eclipse.designer.parser.ParseFactory.getClassLoader(ParseFactory.java:
433)
at
org.eclipse.wb.internal.core.parser.AbstractParseFactory.initializeClassLoader(AbstractParseFactory.java:
732)
at
com.google.gdt.eclipse.designer.parser.ParseFactory.getRootContext(ParseFactory.java:
103)
at
org.eclipse.wb.internal.core.parser.JavaInfoParser.prepareParseContext(JavaInfoParser.java:
1185)
at
org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:
244)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.access
$9(JavaInfoParser.java:240)
at org.eclipse.wb.internal.core.parser.JavaInfoParser
$1.runObject(JavaInfoParser.java:153)
at org.eclipse.wb.internal.core.parser.JavaInfoParser
$1.runObject(JavaInfoParser.java:1)
at
org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runDesignTime(ExecutionUtils.java:
153)
at
org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:
151)
at
org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:
513)
at org.eclipse.wb.internal.core.editor.DesignPage.access
$9(DesignPage.java:501)
at org.eclipse.wb.internal.core.editor.DesignPage
$8$1.run(DesignPage.java:434)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:
179)
at
org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:
150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4584)
at org.eclipse.wb.internal.core.editor.DesignPage
$8.run(DesignPage.java:431)
at
org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:
464)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:
372)
at
org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:
507)
at
org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:
450)
at
org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:
400)
at
org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:
381)
at
org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:
90)
at
org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:
248)
at
org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:
226)
at
org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:
125)
at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode
$1.widgetSelected(DefaultMultiMode.java:63)
at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
234)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:
2743)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1429)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:
257)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:
4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:
2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:
332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:
664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:
149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:
115)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:
196)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:
110)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:
79)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
369)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
179)
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.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
at org.eclipse.equinox.launcher.Main.main(Main.java:1383)

[karim duran]

Hi Jordi,

here's my opinion after reading your log.

1) sometimes Eclipse just open the code in a certain way because you may click in a alternative view ( package view, navigator view instead of project view) depending how you customized your Eclipse.
May be you should try right-clic -> open with -> GWT designer from project view. And try to reproduce the incident after restarting Eclipse.

2) But, by reading your log, i think there's also a pb with your project folders. It seems that Eclipse can't find a CSS file. And then a GEF exception occurs...GEF is the plugin responsible to draw the palette and visual designer interface. Specially, by binding UI components and their CSS properties.

So,

did you import that project ?
did you create it from scratch ?
did you delete a CSS file before this action ?
did you change manually any important file ( conf, xml etc...) ?
did you respect GWT project folders structure ?

regards.

karim duran

2011/7/27 Jordan Reynolds <jordan%aesg...@gtempaccount.com>

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[Maxim]

Hello.

I have the same problem.
it worked for the previous version -
com.google.gdt.eclipse.designer.doc.user_2.3.2.r36x201106201114
but does not work on the current
com.google.gdt.eclipse.designer.hosted.lib_2.3.2.r37x201107161253

It does not depend on the version of eclipse or platform (Windows,
linux).

What is my configuration differs from the standard:
I added *. gwt.xml parameter
<stylesheet src="../MainCabinetGWTOverride.css" />

tried to restore the default behavior and to remove all mention of
this file, but I did not work (it was under Linux. perhaps in the
process I did not REFRESH the project, so maybe the default
configuration will work)

by the way the old version of CSS Designer absent in the list file
MainCabinetGWTOverride.css

I tested this little situation so strongly bound by these can not be
trusted

Sorry my bad English - Google translator

On 27 июл, 20:55, karim duran <karim.du...@gmail.com> wrote:
> Hi Jordi,
>
> here's my opinion after reading your log.
>
> 1) sometimes Eclipse just open the code in a certain way because you may
> click in a alternative view ( package view, navigator view instead of
> project view) depending how you customized your Eclipse.
> May be you should try right-clic -> open with -> GWT designer from project
> view. And try to reproduce the incident after restarting Eclipse.
>
> 2) But, by reading your log, i think there's also a pb with your project
> folders. It seems that Eclipse can't find a CSS file. And then a GEF
> exception occurs...GEF is the plugin responsible to draw the palette and
> visual designer interface. Specially, by binding UI components and their CSS
> properties.
>
> So,
>
> did you import that project ?
> did you create it from scratch ?
> did you delete a CSS file before this action ?
> did you change manually any important file ( conf, xml etc...) ?
> did you respect GWT project folders structure ?
>
> regards.
>
> karim duran
>

> 2011/7/27 Jordan Reynolds <jordan%aesgs....@gtempaccount.com>

[Eric Clayberg]

This NoSuchMethodError exception indicates that GWT Designer is not properly installed or that there was some sort of partial update. 

A re-install or update to the latest build should take care of that problem immediately.

BTW, any time you see a NoSuchMethodError exception that refers to code in the plugin itself, that is a very clear indication that you have a broken/partial installation.