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QRadioButton Class Reference

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

#include <QRadioButton>

Inherits QAbstractButton.

Writable Properties

Read-Only Properties

Public Functions

Public Slots

Signals

Static Public Members

Protected Functions


Detailed Description

The QRadioButton widget provides a radio button with a text or pixmap 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 autoExclusive 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. Otherwise, use isChecked() to see if a particular button is selected.

Just like QPushButton, a radio button can display text or a pixmap. The text can be set in the constructor or with setText(); the pixmap is set with setPixmap().

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

Screenshot in Motif style Screenshot in Windows style

GUI Design Handbook: Radio Button

See also QPushButton, QToolButton, and QCheckBox.


Property Documentation

autoExclusive : bool

This property holds whether the radio button is automatically exclusive.

If the radio button is exclusive, it will be deselected if another in the same group is enabled. Similarly, if it is selected, other exclusive buttons in the same group will be deselected.

The default is true.

autoMask : bool

This property holds whether the radio button is automatically masked.

See also QWidget::setAutoMask().


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.

The parent argument is passed on to the QAbstractButton constructor.


Copyright © 2004 Trolltech Trademarks
Qt 4.0.0-b1