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QButtonGroup Class Reference
^{[модуль QtGui ]}

The QButtonGroup class provides a container to organize groups of button widgets. Далее...

 #include <QButtonGroup>

Inherits QObject.

• Список всех членов, включая унаследованные
• Поддерживаемые члены Qt 3

Свойства

• exclusive : bool

• 1 свойство, унаследованное от QObject

Открытые функции

• QButtonGroup ( QObject * parent = 0 )
• ~QButtonGroup ()
• void addButton ( QAbstractButton * button )
• void addButton ( QAbstractButton * button, int id )
• QAbstractButton * button ( int id ) const
• QList<QAbstractButton *> buttons () const
• QAbstractButton * checkedButton () const
• int checkedId () const
• bool exclusive () const
• int id ( QAbstractButton * button ) const
• void removeButton ( QAbstractButton * button )
• void setExclusive ( bool )
• void setId ( QAbstractButton * button, int id )

• 29 открытых функций, унаследованных от QObject

Сигналы

• void buttonClicked ( QAbstractButton * button )
• void buttonClicked ( int id )
• void buttonPressed ( QAbstractButton * button )
• void buttonPressed ( int id )
• void buttonReleased ( QAbstractButton * button )
• void buttonReleased ( int id )

• 1 сигнал, унаследованный от QObject

Дополнительные унаследованные члены

• 1 открытый слот, унаследованный от QObject
• 5 статических открытых членов, унаследованных от QObject
• 7 защищенных функций, унаследованных от QObject

Подробное описание

The QButtonGroup class provides a container to organize groups of button widgets.

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 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, QCheckBoxes (normally for non-exclusive button groups), or QRadioButtons. 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 purpose of the mapping mechanism is to simplify the representation of enum values in a user interface.

See also QGroupBox, QPushButton, QCheckBox, and QRadioButton.

Описание cвойств

exclusive : bool

This property holds 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.

Функции доступа:

• bool exclusive () const
• void setExclusive ( bool )

Описание функций-членов

QButtonGroup::QButtonGroup ( QObject * parent = 0 )

Constructs a new, empty button group with the given parent.

See also addButton() and setExclusive().

QButtonGroup::~QButtonGroup ()

Destroys the button group.

void QButtonGroup::addButton ( QAbstractButton * button )

Adds the given button to the end of the group's internal list of buttons.

See also removeButton().

void QButtonGroup::addButton ( QAbstractButton * button, int id )

Эта перегруженная функция предоставлена для удобства.

Adds the given button to the button group, with the given id.

See also removeButton() and buttons().

QAbstractButton * QButtonGroup::button ( int id ) const

Returns the button with the specified id, or 0 if no such button exists.

Эта функция была введена в Qt 4.1.

void QButtonGroup::buttonClicked ( QAbstractButton * button ) [signal]

This signal is emitted when the given 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.

See also checkedButton() and QAbstractButton::clicked().

void QButtonGroup::buttonClicked ( int id ) [signal]

Эта перегруженная функция предоставлена для удобства.

This signal is emitted when a button with the given id is clicked.

See also checkedButton() and QAbstractButton::clicked().

void QButtonGroup::buttonPressed ( QAbstractButton * button ) [signal]

This signal is emitted when the given button is pressed down.

Эта функция была введена в Qt 4.2.

See also QAbstractButton::pressed().

void QButtonGroup::buttonPressed ( int id ) [signal]

Эта перегруженная функция предоставлена для удобства.

This signal is emitted when a button with the given id is pressed down.

Эта функция была введена в Qt 4.2.

See also QAbstractButton::pressed().

void QButtonGroup::buttonReleased ( QAbstractButton * button ) [signal]

This signal is emitted when the given button is released.

Эта функция была введена в Qt 4.2.

See also QAbstractButton::released().

void QButtonGroup::buttonReleased ( int id ) [signal]

Эта перегруженная функция предоставлена для удобства.

This signal is emitted when a button with the given id is released.

Эта функция была введена в Qt 4.2.

See also QAbstractButton::released().

QList< QAbstractButton *> QButtonGroup::buttons () const

Returns the list of this groups's buttons. This may be empty.

See also addButton() and removeButton().

QAbstractButton * QButtonGroup::checkedButton () const

Returns the button group's checked button, or 0 if no buttons are checked.

See also buttonClicked().

int QButtonGroup::checkedId () const

Returns the id of the checkedButton(), or -1 if no button is checked.

Эта функция была введена в Qt 4.1.

See also setId().

int QButtonGroup::id ( QAbstractButton * button ) const

Returns the id for the specified button, or -1 if no such button exists.

Эта функция была введена в Qt 4.1.

See also setId().

void QButtonGroup::removeButton ( QAbstractButton * button )

Removes the given button from the button group.

See also addButton() and buttons().

void QButtonGroup::setId ( QAbstractButton * button, int id )

Sets the id for the specified button.

Эта функция была введена в Qt 4.1.

See also id().