Bug 319961 Reset perspective fails with parts moved into the editor area
1. Start a fresh e4 workbench 2. Move the Javadoc view into the editor area 3. Reset the perspective 4. Open the Javadoc view Result: The Javadoc view is opened in the editor area. In the bottom stack there still is a tab for the Javadoc view; this tab can be clicked, but it will activate the view in the editor area. The toolbar, however, is shown in the bottom stack.
bundles/org.eclipse.e4.ui.workbench.addons.swt/src/org/eclipse/e4/ui/workbench/addons/dndaddon/DnDManager.java
private static final int DRAG_OFFSET = 8;
	DragAndDropUtil dndUtil;
	Rectangle offScreenRect = new Rectangle(10000, -10000, 1, 1);
	Collection<DragAgent> dragAgents = new ArrayList<DragAgent>();
	DragAgent dragAgent;
	boolean dragging = false;
	Collection<DropAgent> dropAgents = new ArrayList<DropAgent>();
	DropAgent dropAgent;
	protected CursorInfo dndInfo;
	protected Point downPos;