Bug 26979 Outline pop-up: flicker when filtering
1) open the outline pop-up (ctrl-O) 2) type in a letter ->observe that you can watch how the tree items are removed and then added again. Use of setRedraw(false/true) during filtering should avoid this flickering
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/text/JavaSourceViewerConfiguration.java
/*
	 * @see SourceViewerConfiguration#getInformationPresenter(ISourceViewer)
	 * @since 2.0
	 */
	public IInformationPresenter getInformationPresenter(ISourceViewer sourceViewer) {
		InformationPresenter presenter= new InformationPresenter(getInformationPresenterControlCreator(sourceViewer));
		IInformationProvider provider= new JavaInformationProvider(getEditor());
		presenter.setInformationProvider(provider, IDocument.DEFAULT_CONTENT_TYPE);
		presenter.setInformationProvider(provider, JavaPartitionScanner.JAVA_DOC);
		presenter.setSizeConstraints(60, 10, true, true);		
		return presenter;
	}
	/**
	 * Returns the outline presenter which will determine and shown
	 * information requested for the current cursor position.
	 *
	 * @param sourceViewer the source viewer to be configured by this configuration
	 * @return an information presenter
	 * @since 2.1
	 */
	public IInformationPresenter getOutlinePresenter(ISourceViewer sourceViewer, boolean doCodeResolve) {
		InformationPresenter presenter= new InformationPresenter(getOutlinePresenterControlCreator(sourceViewer));
		IInformationProvider provider= new JavaElementProvider(getEditor(), doCodeResolve);
		presenter.setInformationProvider(provider, IDocument.DEFAULT_CONTENT_TYPE);
		presenter.setInformationProvider(provider, JavaPartitionScanner.JAVA_DOC);
		presenter.setSizeConstraints(30, 20, true, false);
		return presenter;
	}
}