38    QSize sizeHint() 
const override;
 
   39    QSize minSize() 
const override;
 
   40    QSize maxSizeHint() 
const override;
 
   41    QRect geometry() 
const override;
 
   42    void setGeometry(
QRect) 
override;
 
   43    void setParent(
Widget *) 
override;
 
   45    bool isVisible() 
const override;
 
   46    void setVisible(
bool) 
const override;
 
   47    std::unique_ptr<Widget> parentWidget() 
const override;
 
   53    void move(
int x, 
int y) 
override;
 
   54    void setSize(
int width, 
int height) 
override;
 
   55    void setWidth(
int width) 
override;
 
   56    void setHeight(
int height) 
override;
 
   57    void update() 
override;
 
 
T qobject_cast(QObject *object)