Bug 187189 [ViewMgmt] TreeViewer disposes of widget when the third item in the tree is deleted
Build ID: 3.3.0M7 Steps To Reproduce: 1.Run attached sample code 2.Use button to delete tree items from bottom until exception is thrown. 3. More information: M6 does not exhibit this behavior. Exception in thread "main" org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:3547) at org.eclipse.swt.SWT.error(SWT.java:3465) at org.eclipse.swt.SWT.error(SWT.java:3436) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:325) at org.eclipse.swt.widgets.TreeItem.getBounds(TreeItem.java:401) at org.eclipse.jface.viewers.TreeViewerRow.getBounds(TreeViewerRow.java:48) at org.eclipse.jface.viewers.ViewerCell.getBounds(ViewerCell.java:83) at org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter.focusCellChanged(FocusCellOwnerDrawHighlighter.java:147) at org.eclipse.jface.viewers.SWTFocusCellManager.setFocusCell(SWTFocusCellManager.java:151) at org.eclipse.jface.viewers.SWTFocusCellManager.handleSelection(SWTFocusCellManager.java:101) at org.eclipse.jface.viewers.SWTFocusCellManager.access$2(SWTFocusCellManager.java:92) at org.eclipse.jface.viewers.SWTFocusCellManager$1.handleEvent(SWTFocusCellManager.java:126)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/SWTFocusCellManager.java
private CellNavigationStrategy navigationStrategy;
	private ColumnViewer viewer;
	private ViewerCell focusCell;
	private FocusCellHighlighter cellHighlighter;
	/**
	 * @param viewer
	 * @param focusDrawingDelegate
	 * @param navigationDelegate
	 */
	public SWTFocusCellManager(ColumnViewer viewer,
			FocusCellHighlighter focusDrawingDelegate,
			CellNavigationStrategy navigationDelegate) {
		this.viewer = viewer;
		this.cellHighlighter = focusDrawingDelegate;
		this.navigationStrategy = navigationDelegate;
		hookListener(viewer);
	}
	/**
	 * This method is called by the framework to initialize this cell manager.