Bug 256656 [FieldAssist] cancel auto activation of proposal popup when caret moved
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
private int filterStyle = FILTER_NONE;
	/*
	 * The listener we install on the control.
	 */
	private Listener controlListener;
	/*
	 * The list of IContentProposalListener listeners.
	 */
	private ListenerList proposalListeners = new ListenerList();
	/*
	 * The list of IContentProposalListener2 listeners.
	 */
	private ListenerList proposalListeners2 = new ListenerList();
	/*
	 * Flag that indicates whether the adapter is enabled. In some cases,
	 * adapters may be installed but depend upon outside state.
	 */
	private boolean isEnabled = true;
	/*
	 * The delay in milliseconds used when autoactivating the popup.
	 */
	private int autoActivationDelay = 0;
	/*
	 * A boolean indicating whether a keystroke has been received. Used to see
	 * if an autoactivation delay was interrupted by a keystroke.
	 */
	private boolean receivedKeyDown;
	/*
	 * The desired size in pixels of the proposal popup.
	 */