[news.eclipse.platform.swt] Problems Opening GEF Editor: Migration from

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[news.eclipse.platform.swt] Problems Opening GEF Editor: Migration from 3.1 M6->3.1.1
From: "Paul Wuethrich" <paul.wuethrich@xxxxxxxxxxx>
Date: Wed, 12 Oct 2005 09:26:48 -0600
Newsgroups: eclipse.platform.swt
Organization: EclipseCorner
We just migrated to 3.1.1 from 3.1 M6 and are having trouble opening our GEF
editor.  It is a multi-page editor and the stack trace seems to point to
something in SWT.  We have three other multi-page editors that do not use
GEF and they open fine in 3.1.1.  I have also posted this to the GEF
newsgroup.

The problem is in the SWT class FillLayout whereby a class cast exception is
thrown since the returned object is always a GridData and not a FillData
object.  This exception is thrown upon attempting to open the editor and on
the selection of any tab once the editor is opened.  There are no references
to our code beyond the action that invokes open editor functionality.

class FillLayout {

Point computeChildSize (Control control, int wHint, int hHint, boolean
flushCache) {
    FillData data = (FillData)control.getLayoutData ();  // LINE 141
    ...
}

!ENTRY org.eclipse.jface 4 2 2005-10-12 09:01:49.781
!MESSAGE Problems occurred when invoking code from plug-in:
"org.eclipse.jface".
!STACK 0
java.lang.ClassCastException: org.eclipse.swt.layout.GridData
 at org.eclipse.swt.layout.FillLayout.computeChildSize(FillLayout.java:141)
 at org.eclipse.swt.layout.FillLayout.computeSize(FillLayout.java:119)
 at org.eclipse.swt.widgets.Composite.computeSize(Composite.java:213)
 at org.eclipse.swt.layout.GridData.computeSize(GridData.java:478)
 at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:207)
 at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:186)
 at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:869)
 at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1248)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3107)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
 at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1651)
 at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3123)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
 at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1140)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1952)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1933)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1929)
 at org.eclipse.swt.layout.FillLayout.layout(FillLayout.java:198)
 at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:869)
 at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1248)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3107)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
 at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1651)
 at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3123)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.EndDeferWindowPos(Native Method)
 at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:653)
 at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:619)
 at org.eclipse.swt.widgets.Composite.setResizeChildren(Composite.java:786)
 at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1252)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3107)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
 at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1651)
 at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3123)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
 at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1140)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1952)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1933)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1929)
 at org.eclipse.swt.layout.FillLayout.layout(FillLayout.java:198)
 at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:869)
 at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1248)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3107)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
 at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1651)
 at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3123)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
 at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1140)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1952)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1933)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1929)
 at org.eclipse.swt.layout.FillLayout.layout(FillLayout.java:198)
 at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:869)
 at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1248)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3107)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
 at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1651)
 at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
 at org.eclipse.swt.widgets.Control.windowProc(Control.java:3123)
 at org.eclipse.swt.widgets.Display.windowProc(Display.java:3706)
 at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
 at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1140)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1952)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1933)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1929)
 at org.eclipse.swt.widgets.Control.setBounds(Control.java:1999)
 at org.eclipse.ui.internal.LayoutPart.setBounds(LayoutPart.java:299)
 at
org.eclipse.ui.internal.presentations.PresentablePart.setBounds(PresentableP
art.java:118)
 at
org.eclipse.ui.internal.presentations.util.PresentablePartFolder.layoutConte
nt(PresentablePartFolder.java:131)
 at
org.eclipse.ui.internal.presentations.util.PresentablePartFolder.layout(Pres
entablePartFolder.java:405)
 at
org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(Pres
entablePartFolder.java:289)
 at
org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftTo
RightTabOrder.java:65)
 at
org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPar
t(TabbedStackPresentation.java:391)
 at
org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.jav
a:1102)
 at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1051)
 at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1256)
 at org.eclipse.ui.internal.PartStack.add(PartStack.java:442)
 at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:109)
 at
org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.ja
va:60)
 at
org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:2
12)
 at
org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:202
)
 at
org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:758
)
 at
org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager
.java:665)
 at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:628)
 at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.ja
va:2360)
 at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2295
)
 at org.eclipse.ui.internal.WorkbenchPage.access$9(WorkbenchPage.java:2287)
 at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2273)
 at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
 at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2268)
 at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2249)
 at org.eclipse.ui.ide.IDE.openEditor(IDE.java:371)
 at org.eclipse.ui.ide.IDE.openEditor(IDE.java:334)
 at org.eclipse.ui.actions.OpenFileAction.openFile(OpenFileAction.java:98)
 at
org.eclipse.ui.actions.OpenSystemEditorAction.run(OpenSystemEditorAction.jav
a:98)
 at
com.eyeris.eyeprofit.ui.core.views.navigator.EPOpenActionGroup.runDefaultAct
ion(EPOpenActionGroup.java:109)
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