Bug 88742 Drop target is not selected in center of target item (all java views) [dnd]
I20050315-1100 + zrh-plugins for I20050322 Highlighting of the drop target is broken in Package Explorer, Type Hierarchy, Outline, ...: The drop target tree item under the cursor is only rendered as selected when the mouse cursor points to the top or bottom quarter of the item label. When the cursor is moved towards the center of the tree item, the item is not rendered as selected (but it should). The drop action seems to work regardless of the missing visual feedback.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/dnd/JdtViewerDropAdapter.java
* slightly before the target.
	 */
	public static final int LOCATION_BEFORE= DND.FEEDBACK_INSERT_BEFORE;
	
	/**
	 * Constant describing the position of the mouse cursor relative 
	 * to the target object.  This means the mouse is positioned
	 * slightly after the target.
	 */
	public static final int LOCATION_AFTER= DND.FEEDBACK_INSERT_AFTER;
	
	/**
	 * The threshold used to determine if the mouse is before or after
	 * an item.
	 */
	private static final int LOCATION_EPSILON= 5; 
	
	private static final int ITEM_MARGIN_LEFT= 40;
	private static final int ITEM_MARGIN_RIGTH= 10;
	
	/**
	 * Style to enable location feedback.
	 */
	public static final int INSERTION_FEEDBACK= 1 << 1; 
	private StructuredViewer fViewer;
	private int fFeedback;
	private boolean fShowInsertionFeedback;
	private boolean fFullWidthMatchesItem;
	private int fRequestedOperation;
	private int fLastOperation;