import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; //导入依赖的package包/类
@Override
protected void createDefaultEditPolicies() {
	super.createDefaultEditPolicies();
	installEditPolicy(EditPolicy.COMPONENT_ROLE, new TransitionExpressionComponentEditPolicy());
	installEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE, new ContextSensitiveHelpPolicy(
			HelpContextIds.SC_PROPERTIES_TRANSITION_EXPRESSION));
	// BUGFIX:
	// https://code.google.com/a/eclipselabs.org/p/yakindu/issues/detail?id=26
	installEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE, new NonResizableLabelEditPolicy() {
		@Override
		protected void replaceHandleDragEditPartsTracker(Handle handle) {
			if (handle instanceof AbstractHandle) {
				AbstractHandle h = (AbstractHandle) handle;
				h.setDragTracker(new DragEditPartsTrackerEx(getHost()) {
					protected boolean isMove() {
						return true;
					};
				});
			}
		}
	});
}
 

import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; //导入依赖的package包/类
/**
 * @generated
 */
protected List createSelectionHandles() {
	MoveHandle moveHandle = new MoveHandle((GraphicalEditPart) getHost());
	moveHandle.setBorder(null);
	moveHandle.setDragTracker(new DragEditPartsTrackerEx(getHost()));
	return Collections.singletonList(moveHandle);
}
 

import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; //导入依赖的package包/类
/**
 * Performs direct edit on double click
 */
@Override
public DragTracker getDragTracker(final Request request) {
	return new DragEditPartsTrackerEx(this) {
		protected boolean isMove() {
			return true;
		}

		protected boolean handleDoubleClick(int button) {
			performDirectEditRequest(request);
			return super.handleDoubleClick(button);
		}
	};
}
 

import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; //导入依赖的package包/类
/**
* @generated
*/
protected List createSelectionHandles() {
	MoveHandle moveHandle = new MoveHandle((GraphicalEditPart) getHost());
	moveHandle.setBorder(null);
	moveHandle.setDragTracker(new DragEditPartsTrackerEx(getHost()));
	return Collections.singletonList(moveHandle);
}
 

import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; //导入依赖的package包/类
/**
 * @generated
 */
protected List createSelectionHandles() {
    MoveHandle moveHandle = new MoveHandle((GraphicalEditPart) getHost());
    moveHandle.setBorder(null);
    moveHandle.setDragTracker(new DragEditPartsTrackerEx(getHost()));
    return Collections.singletonList(moveHandle);
}