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
/**
	 * The event type of THEME_EVENT.
	 */
	public static final int THEME_EVENT = 15;
	
	/**
	 * The event type of CONTENT_REPLACE_EVENT.
	 */
	
	public static final int CONTENT_REPLACE_EVENT = 16;
	
	/**
	 * The event type of TEMPLATE_TRANSFORM_EVENT.
	 */
	
	public static final int TEMPLATE_TRANSFORM_EVENT = 17;
	
	/**
	 * The event type of ELEMENT_LOCALIZE_EVENT
	 */
	
	public static final int ELEMENT_LOCALIZE_EVENT = 18;
	/**
	 * The event type of LIBRARY_RELOADED_EVENT
	 */
	
	public static final int LIBRARY_RELOADED_EVENT = 19;