Qt 4.0: QScrollArea Class Reference

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# QScrollArea Class Reference
[QtGui module]

The QScrollArea class provides a scrolling view onto another widget. More...

    #include <QScrollArea>

Inherits QAbstractScrollArea.

- List of all members, including inherited members

### Properties

- widgetResizable : bool

- 2 properties inherited from QAbstractScrollArea
- 6 properties inherited from QFrame
- 52 properties inherited from QWidget
- 1 property inherited from QObject

### Public Functions

- QScrollArea ( QWidget * parent = 0 )
- ~QScrollArea ()
- void setWidget ( QWidget * w )
- void setWidgetResizable ( bool resizable )
- QWidget * takeWidget ()
- QWidget * widget () const
- bool widgetResizable () const

- 8 public functions inherited from QAbstractScrollArea
- 13 public functions inherited from QFrame
- 184 public functions inherited from QWidget
- 28 public functions inherited from QObject
- 10 public functions inherited from QPaintDevice

### Additional Inherited Members

- 17 public slots inherited from QWidget
- 1 public slot inherited from QObject
- 1 signal inherited from QWidget
- 1 signal inherited from QObject
- 2 static public members inherited from QFrame
- 4 static public members inherited from QWidget
- 4 static public members inherited from QObject
- 17 protected functions inherited from QAbstractScrollArea
- 39 protected functions inherited from QWidget
- 7 protected functions inherited from QObject

## Detailed Description

The QScrollArea class provides a scrolling view onto another widget.

A scroll area is used to display the contents of a child widget within a frame. If the widget exceeds the size of the frame, the view can provide scroll bars so that the entire area of the child widget can be viewed.

The child widget must be specified with setWidget(); it can be retrieved with widget(). The view can be made to be resizable with the setWidgetResizable() function.

When using a scroll area to display the contents of a custom widget, it is important to ensure that the size hint of the child widget is set to a suitable value. If a standard QWidget is used for the child widget, it may be necessary to call QWidget::setMinimumSize() to ensure that the contents of the widget are shown correctly within the scroll area.

## Property Documentation

### widgetResizable : bool

This property holds whether the scroll area should resize the view widget.

If this property is set to false (the default), the view honors the size of its widget. Regardless of this property, you can programmatically resize the widget using widget()->resize(), and the scroll area will automatically adjust itself to the new size.

If this property is set to true, the view will automatically resize the widget in order to avoid scroll bars where they can be avoided, or to take advantage of extra space.

Access functions:

- bool widgetResizable () const
- void setWidgetResizable ( bool resizable )

## Member Function Documentation

### QScrollArea::QScrollArea ( QWidget * parent = 0 )

Constructs a scroll area with the given parent, and with no widget; see setWidget().

### QScrollArea::~QScrollArea ()

Destroys the scroll area.

### void QScrollArea::setWidget ( QWidget * w )

Set's the view widget's widget to w.

w becomes a child of the scroll area, and will be destroyed when the scroll area is deleted or when a new view widget is set.

See also widget().

### QWidget * QScrollArea::takeWidget ()

Removes the view widget's widget from the view, and passes ownership of the widget to the caller.

### QWidget * QScrollArea::widget () const

Returns the view widget's widget, or 0 if there is none.

See also setWidget().