Bug 150347 Support binary stream as preview image.
See 144843. We need model to save binary strame as report preview image. Currently, preview image is an external image. Maybe need a type to distinguish preview image type.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/activity/NotificationEvent.java
*/
	public static final int USER_PROP_EVENT = 7;
	/**
	 * The event type of CustomMsgEvent.
	 */
	public static final int CUSTOM_MSG_EVENT = 8;
	/**
	 * The event type of PropertyListEvent.
	 */
	public static final int EXTENSION_PROPERTY_DEFINITION_EVENT = 9;
	/**
	 * The event type of ValidationEvent
	 */
	public static final int VALIDATION_EVENT = 10;
	/**
	 * The event type of LibraryEvent
	 */
	public static final int LIBRARY_EVENT = 11;
	/**
	 * The event type of attributeEvent.
	 */
	public static final int ATTRIBUTE_EVENT = 12;
	/**
	 * The event type of DISPOSE_EVENT.
	 */
	public static final int DISPOSE_EVENT = 13;
	/**
	 * The event type of LAYOUT_CHANGED_EVENT.
	 */
	public static final int LAYOUT_CHANGED_EVENT = 14;