/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \class QButtonGroup \brief The QButtonGroup class provides a container to organize groups of button widgets. \ingroup organizers \ingroup geomanagement \ingroup appearance \mainclass QButtonGroup provides an abstract container into which button widgets can be placed. It does not provide a visual representation of this container (see QGroupBox for a container widget), but instead manages the states of each of the buttons in the group. An \l {QButtonGroup::exclusive} {exclusive} button group switches off all checkable (toggle) buttons except the one that was clicked. By default, a button group is exclusive. The buttons in a button group are usually checkable QPushButton's, \l{QCheckBox}es (normally for non-exclusive button groups), or \l{QRadioButton}s. If you create an exclusive button group, you should ensure that one of the buttons in the group is initially checked; otherwise, the group will initially be in a state where no buttons are checked. A button is added to the group with addButton(). It can be removed from the group with removeButton(). If the group is exclusive, the currently checked button is available as checkedButton(). If a button is clicked the buttonClicked() signal is emitted. For a checkable button in an exclusive group this means that the button was checked. The list of buttons in the group is returned by buttons(). In addition, QButtonGroup can map between integers and buttons. You can assign an integer id to a button with setId(), and retrieve it with id(). The id of the currently checked button is available with checkedId(), and there is an overloaded signal buttonClicked() which emits the id of the button. The id \c {-1} is reserved by QButtonGroup to mean "no such button". The purpose of the mapping mechanism is to simplify the representation of enum values in a user interface. \sa QGroupBox QPushButton, QCheckBox, QRadioButton */ /*! \fn QButtonGroup::QButtonGroup(QObject *parent) Constructs a new, empty button group with the given \a parent. \sa addButton() setExclusive() */ /*! \fn QButtonGroup::~QButtonGroup() Destroys the button group. */ /*! \property QButtonGroup::exclusive \brief whether the button group is exclusive If this property is true then only one button in the group can be checked at any given time. The user can click on any button to check it, and that button will replace the existing one as the checked button in the group. In an exclusive group, the user cannot uncheck the currently checked button by clicking on it; instead, another button in the group must be clicked to set the new checked button for that group. By default, this property is true. */ /*! \fn void QButtonGroup::buttonClicked(QAbstractButton *button) This signal is emitted when the given \a button is clicked. A button is clicked when it is first pressed and then released, when its shortcut key is typed, or programmatically when QAbstractButton::click() or QAbstractButton::animateClick() is called. \sa checkedButton(), QAbstractButton::clicked() */ /*! \fn void QButtonGroup::buttonClicked(int id) This signal is emitted when a button with the given \a id is clicked. \sa checkedButton(), QAbstractButton::clicked() */ /*! \fn void QButtonGroup::buttonPressed(QAbstractButton *button) \since 4.2 This signal is emitted when the given \a button is pressed down. \sa QAbstractButton::pressed() */ /*! \fn void QButtonGroup::buttonPressed(int id) \since 4.2 This signal is emitted when a button with the given \a id is pressed down. \sa QAbstractButton::pressed() */ /*! \fn void QButtonGroup::buttonReleased(QAbstractButton *button) \since 4.2 This signal is emitted when the given \a button is released. \sa QAbstractButton::released() */ /*! \fn void QButtonGroup::buttonReleased(int id) \since 4.2 This signal is emitted when a button with the given \a id is released. \sa QAbstractButton::released() */ /*! \fn void QButtonGroup::addButton(QAbstractButton *button, int id = -1); Adds the given \a button to the button group, with the given \a id. If \a id is -1 (the default), an id will be assigned to the button by this QButtonGroup. \sa removeButton() buttons() */ /*! \fn void QButtonGroup::removeButton(QAbstractButton *button); Removes the given \a button from the button group. \sa addButton() buttons() */ /*! \fn QList QButtonGroup::buttons() const Returns the list of this groups's buttons. This may be empty. \sa addButton(), removeButton() */ /*! \fn QAbstractButton *QButtonGroup::checkedButton() const; Returns the button group's checked button, or 0 if no buttons are checked. \sa buttonClicked() */ /*! \fn QAbstractButton *QButtonGroup::button(int id) const; \since 4.1 Returns the button with the specified \a id, or 0 if no such button exists. */ /*! \fn void QButtonGroup::setId(QAbstractButton *button, int id) \since 4.1 Sets the \a id for the specified \a button. Note that \a id can not be -1. \sa id() */ /*! \fn int QButtonGroup::id(QAbstractButton *button) const; \since 4.1 Returns the id for the specified \a button, or -1 if no such button exists. \sa setId() */ /*! \fn int QButtonGroup::checkedId() const; \since 4.1 Returns the id of the checkedButton(), or -1 if no button is checked. \sa setId() */ /*! \fn void QButtonGroup::insert(QAbstractButton *b) Use addButton() instead. */ /*! \fn void QButtonGroup::remove(QAbstractButton *b) Use removeButton() instead. */