text: #ifndef FRAMELESS_HELPER_H
  #define FRAMELESS_HELPER_H
  
  #include <QObject>
  
  class QWidget;
  class FramelessHelperPrivate;
  
  class FramelessHelper : public QObject
  {
      Q_OBJECT
  
  public:
      explicit FramelessHelper(QObject *parent = 0);
      ~FramelessHelper();
      // 激活窗体
      void activateOn(QWidget *topLevelWidget);
      // 移除窗体
      void removeFrom(QWidget *topLevelWidget);
      // 设置窗体移动
      void setWidgetMovable(bool movable);
      // 设置窗体缩放
      void setWidgetResizable(bool resizable);
      // 设置橡皮筋移动
      void setRubberBandOnMove(bool movable);
      // 设置橡皮筋缩放
      void setRubberBandOnResize(bool resizable);
      // 设置边框的宽度
      void setBorderWidth(uint width);
      // 设置标题栏高度
      void setTitleHeight(uint height);
      bool widgetResizable();
      bool widgetMovable();
      bool rubberBandOnMove();
      bool rubberBandOnResisze();
      uint borderWidth();
      uint titleHeight();
  
  protected:
      // 事件过滤，进行移动、缩放等
      virtual bool eventFilter(QObject *obj, QEvent *event);
  
  private:
      FramelessHelperPrivate *d;
  };
  
  #endif //FRAMELESS_HELPER_H