Bug 5699 Add ResourceTransfer to packages view
The packages view should add the ResoruceTransfer as a drag source to its list of transfers
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/dnd/JdtViewerDropAdapter.java
protected static final int LOCATION_ON= 3;
	
	/**
	 * Constant describing the position of the cursor relative 
	 * to the target object.  This means the mouse is not positioned
	 * over or near any valid target.
	 */
	protected static final int LOCATION_NONE= 4;
	
	/**
	 * The threshold used to determine if the mouse is before or after
	 * a item.
	 */
	private static final int LOCATION_EPSILON= 5; 
	
	/**
	 * The threshold used to determine if the mouse is near the border
	 * and scrollinh should occur.
	 */
	private static final int SCROLL_EPSILON= 20;
	
	/**
	 * Style to enable location feedback.
	 */
	public static final int INSERTION_FEEDBACK= 1 << 1; 
	private int fStyle;
	private StructuredViewer fViewer;
	private int fRequestedOperation;
	private int fLastOperation;
	private long fLastScroll;