Bug 34335 DND doesn't work
RC2 Linux-GTK Drag and drop doesn't work. I've tried it in the DNDExample and in the package explorer and drags are never initiated.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
*/	
	public IJavaElement getInputElement() {
		return fInputElement;
	}			
		
	/**
	 * Sets the input to a new element.
	 */	
	public void setInputElement(IJavaElement element) {
		if (element != null) {
			if (element instanceof IMember) {
				if (element.getElementType() != IJavaElement.TYPE) {
					element= ((IMember) element).getDeclaringType();
				}				
				ICompilationUnit cu= ((IMember) element).getCompilationUnit();
				if (cu != null && cu.isWorkingCopy()) {
					element= cu.getOriginal(element);
					if (!element.exists()) {
						MessageDialog.openError(getSite().getShell(), TypeHierarchyMessages.getString("TypeHierarchyViewPart.error.title"), TypeHierarchyMessages.getString("TypeHierarchyViewPart.error.message")); 
						return;
					}
				}
			} else {
				int kind= element.getElementType();
				if (kind != IJavaElement.JAVA_PROJECT && kind != IJavaElement.PACKAGE_FRAGMENT_ROOT && kind != IJavaElement.PACKAGE_FRAGMENT) {
					element= null;
					JavaPlugin.logErrorMessage("Invalid type hierarchy input type.");
				}
			}
		}