import org.eclipse.gef.handles.NonResizableHandleKit; //导入依赖的package包/类
protected void createDragHandle(List handles, int direction) {
	if (isDragAllowed()) {
		// display 'resize' handles to allow dragging (drag tracker)
		NonResizableHandleKit.addHandle((GraphicalEditPart) getHost(), handles, direction, getDragTracker(),
				SharedCursors.SIZEALL);
	} else {
		// display 'resize' handles to indicate selection only (selection
		// tracker)
		NonResizableHandleKit.addHandle((GraphicalEditPart) getHost(), handles, direction, getSelectTracker(),
				SharedCursors.ARROW);
	}
}
 

import org.eclipse.gef.handles.NonResizableHandleKit; //导入依赖的package包/类
/**
 * Creates a 'resize'/'drag' handle, which uses a
 * {@link DragEditPartsTracker} in case {@link #isDragAllowed()} returns
 * true, and a {@link SelectEditPartTracker} otherwise.
 * 
 * @param handles
 *            The list of handles to add the resize handle to
 * @param direction
 *            A position constant indicating the direction to create the
 *            handle for
 * @since 3.7
 */
protected void createDragHandle(List handles, int direction) {
	if (isDragAllowed()) {
		// display 'resize' handles to allow dragging (drag tracker)
		NonResizableHandleKit
				.addHandle((GraphicalEditPart) getHost(), handles,
						direction, getDragTracker(), SharedCursors.SIZEALL);
	} else {
		// display 'resize' handles to indicate selection only (selection
		// tracker)
		NonResizableHandleKit
				.addHandle((GraphicalEditPart) getHost(), handles,
						direction, getSelectTracker(), SharedCursors.ARROW);
	}
}