// the following adds support for fast views
final int noCenterChildren[] = { 0 };
TrimLayout pageLayout = new TrimLayout() {
	boolean centerControlInitialized = false;
	@Override
	protected void layout(Composite composite, boolean flushCache) {
		// set page composite as center control
		if (!centerControlInitialized && composite.getChildren().length > noCenterChildren[0]) {
			setCenterControl(composite.getChildren()[composite.getChildren().length - 1]);
			centerControlInitialized = true;
		}
		super.layout(composite, flushCache);
	}
};
page.setLayout( pageLayout );

// TODO investigate how to use ViewStackTrimToolBar instead of legacy FastViewBar
// Problem: TrimToolBarBase.createControl(...) uses wbw.getShell() as parent -> shell has to use a TrimLayout

final FastViewBar fastViewBar = new FastViewBar((WorkbenchWindow) configurer.getWindow());
fastViewBar.createControl(page);
fastViewBar.dock(SWT.LEFT);
if (pageLayout.getTrim(fastViewBar.getId()) == null) {
	pageLayout.addTrim(fastViewBar.getSide(), fastViewBar);
}
noCenterChildren[0] = page.getChildren().length;

page.setData(FastViewBar.FASTVIEWBAR_ID, fastViewBar);
// update fast views when switching perspectives
configurer.getWindow().addPerspectiveListener(new IPerspectiveListener() {
	public void perspectiveChanged(IWorkbenchPage page,
			IPerspectiveDescriptor perspective, String changeId) {
	}
	
	public void perspectiveActivated(IWorkbenchPage page,
			IPerspectiveDescriptor perspective) {
		fastViewBar.update(true);
	}
});