Bug 81116 [Preferences] NPE in PreferenceDialog#updateMessage
!ENTRY org.eclipse.ui 4 0 2004-12-10 18:15:14.156 !MESSAGE java.lang.NullPointerException !STACK 0 java.lang.NullPointerException at org.eclipse.jface.preference.PreferenceDialog.updateMessage(PreferenceDialog.java:1233) at org.eclipse.jface.preference.PreferenceDialog$6.controlResized(PreferenceDialog.java:509) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:148) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:814) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:838) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:819) at org.eclipse.swt.widgets.Control.WM_SIZE(Control.java:3616) at org.eclipse.swt.widgets.Scrollable.WM_SIZE(Scrollable.java:313) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1150) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1528) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method) at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1108) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1920) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1902) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1898) at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:660) at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:186) at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:825) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1161) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1528) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.EndDeferWindowPos(Native Method) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:647) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:613) at org.eclipse.swt.widgets.Composite.setResizeChildren(Composite.java:745) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1165) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1528) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.EndDeferWindowPos(Native Method) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:647) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:613) at org.eclipse.swt.widgets.Composite.setResizeChildren(Composite.java:745) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1165) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1528) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.EndDeferWindowPos(Native Method) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:647) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:613) at org.eclipse.swt.widgets.Composite.setResizeChildren(Composite.java:745) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1165) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1528) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method) at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1108) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1920) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1902) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1898) at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:660) at org.eclipse.swt.layout.GridLayout.layout(GridLayout.java:186) at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:825) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1161) at org.eclipse.swt.widgets.Canvas.WM_SIZE(Canvas.java:251) at org.eclipse.swt.widgets.Decorations.WM_SIZE(Decorations.java:1646) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3074) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1479) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:1457) at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:393) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3090) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1479) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3370) at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method) at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1108) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1942) at org.eclipse.swt.widgets.Decorations.setBounds(Decorations.java:773) at org.eclipse.swt.widgets.Shell.setBounds(Shell.java:989) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1902) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1898) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1967) at org.eclipse.jface.window.Window.initializeBounds(Window.java:662) at org.eclipse.jface.dialogs.Dialog.initializeBounds(Dialog.java:630) at org.eclipse.jface.window.Window.create(Window.java:379) at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:983) at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:182) at org.eclipse.jface.action.Action.runWithEvent(Action.java:989) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:555) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:505) at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:419) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:814) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2803) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2448) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1578) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1549) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:281) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:144) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:102) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:220) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129) 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.basicRun(Main.java:185) at org.eclipse.core.launcher.Main.run(Main.java:710) at org.eclipse.core.launcher.Main.main(Main.java:694)
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
helpPressed();
			return;
		}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#cancelPressed()
	 */
	protected void cancelPressed() {
		
		Iterator nodes = preferenceManager.getElements(PreferenceManager.PRE_ORDER).iterator();
		while (nodes.hasNext()) {
			final IPreferenceNode node = (IPreferenceNode) nodes.next();
			if (getPage(node) != null) {
				Platform.run(new SafeRunnable() {
					public void run() {
						if (!getPage(node).performCancel())
							return;
					}
				});
			}
		}
		setReturnCode(CANCEL);
		close();
	}
	/**
	 * Clear the last selected node. This is so that we not chache the last
	 * selection in case of an error.