Bug 65444 [R21PRES] Close button shown when views not closeable
RC1 build - run the browser example using the R2.1 presentation - the views have close buttons in the titlebar, but should not because the perspective has fixed="true" (meaning that all initial views are non-moveable and non-closeable)
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/r21/widgets/R21PaneFolder.java
import org.eclipse.ui.internal.layout.SizeCache;
import org.eclipse.ui.internal.presentations.ProxyControl;
import org.eclipse.ui.presentations.IStackPresentationSite;
/**
 * This class implements the tab folders that contains can contain two toolbars and
 * status text. Wherever possible, the toolbars are aligned with the tabs. 
 * If there is not enough room beside the tabs, the toolbars are aligned with the status text. This
 * is the same tab folder that is used to arrange views and editors in Eclipse. 
 * <p>
 * This is closely related to DefaultPartPresentation, but they have different responsibilities. This
 * is essentially a CTabFolder that can manage a toolbar. It should not depend on 
 * data structures from the workbench, and its public interface should only use SWT objects or
 * listeners. DefaultPartPresentation uses a PaneFolder to arrange views or editors. Knowledge
 * of higher-level data structures should go there. 
 * </p>
 * <p>
 * Although it is not actually a control, the public interface is much like 
 * an SWT control. Implementation-wise, this is actually a combination of a CTabFolder and 
 * a ViewForm. It encapsulates the details of moving the toolbar between the CTabFolder and
 * the ViewForm, and provides a simpler interface to the ViewForm/CTabFolder. 
 * </p>
 * 
 * @since 3.0
 */
public final class R21PaneFolder {	
	
	private CTabFolder tabFolder;