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/ColumnViewer.java
}
	/**
	 * Returns the column properties of this table viewer. The properties must
	 * correspond with the columns of the table control. They are used to
	 * identify the column in a cell modifier.
	 *
	 * <p>
	 * Since 3.3, an alternative API is available, see
	 * {@link ViewerColumn#setEditingSupport(EditingSupport)} for a more
	 * flexible way of editing values in a column viewer.
	 * </p>
	 *
	 * @return the list of column properties
	 * @since 3.1 (in subclasses, added in 3.3 to abstract class)
	 * @see ViewerColumn#setEditingSupport(EditingSupport)
	 * @see EditingSupport
	 */
	public Object[] getColumnProperties() {
		return columnProperties;
	}
	/**
	 * Returns whether there is an active cell editor.
	 *
	 * <p>
	 * Since 3.3, an alternative API is available, see
	 * {@link ViewerColumn#setEditingSupport(EditingSupport)} for a more
	 * flexible way of editing values in a column viewer.
	 * </p>
	 *
	 * @return <code>true</code> if there is an active cell editor, and