Bug 213166 [Viewers] Problems with OwnerDrawLabelProvider.setUpOwnerDraw
3.4 M4 To set up the owner draw callbacks for a viewer OwnerDrawLabelProvider.setUpOwnerDraw is offered. The problem of this is: a. there's no way to uninstall the callbacks. In our views we want to allow to enable and disable owner draw in the preferences b. from an API client perspective, it would be nicer if the label provider could install itself when installed. A good solution would be to add more life cycle to a label provider. CellLabelProvider.initialize(ColumnViewer, int column) There's already ILableProvider.dispose when a label provider is removed from a viewer.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/CellLabelProvider.java
* The time in milliseconds until the tool tip is displayed.
	 * 
	 * @param object
	 *            the {@link Object} for which the tool tip is shown
	 * @return time in milliseconds until the tool tip is displayed
	 */
	public int getToolTipDisplayDelayTime(Object object) {
		return 0;
	}
	/**
	 * The {@link SWT} style used to create the {@link CLabel} (see there for
	 * supported styles). By default {@link SWT#SHADOW_NONE} is used.
	 * 
	 * @param object
	 *            the element for which the tool tip is shown
	 * @return the style used to create the label
	 * @see CLabel
	 */
	public int getToolTipStyle(Object object) {
		return SWT.SHADOW_NONE;
	}
	/**
	 * Update the label for cell.
	 * 
	 * @param cell
	 *            {@link ViewerCell}
	 */
	public abstract void update(ViewerCell cell);
}