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QRadioButton Class Reference
^{^{[QtGui module]}}

The QRadioButton widget provides a radio button with a text label. More...

 #include <QRadioButton>

Inherits QAbstractButton.

Public Functions

QRadioButton ( QWidget * parent = 0 )
QRadioButton ( const QString & text, QWidget * parent = 0 )

21 public functions inherited from QAbstractButton
201 public functions inherited from QWidget
29 public functions inherited from QObject
12 public functions inherited from QPaintDevice

Protected Functions

void initStyleOption ( QStyleOptionButton * option ) const

3 protected functions inherited from QAbstractButton
38 protected functions inherited from QWidget
7 protected functions inherited from QObject
1 protected function inherited from QPaintDevice

Additional Inherited Members

11 properties inherited from QAbstractButton
56 properties inherited from QWidget
1 property inherited from QObject
5 public slots inherited from QAbstractButton
19 public slots inherited from QWidget
1 public slot inherited from QObject
4 signals inherited from QAbstractButton
1 signal inherited from QWidget
1 signal inherited from QObject
4 static public members inherited from QWidget
5 static public members inherited from QObject
1 protected slot inherited from QWidget

Detailed Description

The QRadioButton widget provides a radio button with a text label.

A QRadioButton is an option button that can be switched on (checked) or off (unchecked). Radio buttons typically present the user with a "one of many" choice. In a group of radio buttons only one radio button at a time can be checked; if the user selects another button, the previously selected button is switched off.

Radio buttons are autoExclusive by default. If auto-exclusive is enabled, radio buttons that belong to the same parent widget behave as if they were part of the same exclusive button group. If you need multiple exclusive button groups for radio buttons that belong to the same parent widget, put them into a QButtonGroup.

Whenever a button is switched on or off it emits the toggled() signal. Connect to this signal if you want to trigger an action each time the button changes state. Use isChecked() to see if a particular button is selected.

Just like QPushButton, a radio button displays text, and optionally a small icon. The icon is set with setIcon(). The text can be set in the constructor or with setText(). A shortcut key can be specified by preceding the preferred character with an ampersand in the text. For example:

 QRadioButton *button = new QRadioButton("Search from the &cursor", this);

In this example the shortcut is Alt+c. See the QShortcut documentation for details (to display an actual ampersand, use '&&').

Important inherited members: text(), setText(), text(), setDown(), isDown(), autoRepeat(), group(), setAutoRepeat(), toggle(), pressed(), released(), clicked(), and toggled().

	A radio button shown in the Plastique widget style.
	A radio button shown in the Windows XP widget style.
	A radio button shown in the Macintosh widget style.

Member Function Documentation

QRadioButton::QRadioButton ( QWidget * parent = 0 )

Constructs a radio button with the given parent, but with no text or pixmap.

The parent argument is passed on to the QAbstractButton constructor.

QRadioButton::QRadioButton ( const QString & text, QWidget * parent = 0 )

Constructs a radio button with the given parent and a text string.