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java.lang.Objectcom.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QObject
com.trolltech.qt.gui.QWidget
com.trolltech.qt.gui.QAbstractButton
com.trolltech.qt.gui.QRadioButton
public class QRadioButton
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. |
Box Example
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.gui.QWidget |
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QWidget.RenderFlag, QWidget.RenderFlags |
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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QSignalEmitter.Signal0, QSignalEmitter.Signal1<A>, QSignalEmitter.Signal2<A,B>, QSignalEmitter.Signal3<A,B,C>, QSignalEmitter.Signal4<A,B,C,D>, QSignalEmitter.Signal5<A,B,C,D,E>, QSignalEmitter.Signal6<A,B,C,D,E,F>, QSignalEmitter.Signal7<A,B,C,D,E,F,G>, QSignalEmitter.Signal8<A,B,C,D,E,F,G,H>, QSignalEmitter.Signal9<A,B,C,D,E,F,G,H,I> |
Field Summary |
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Fields inherited from class com.trolltech.qt.gui.QAbstractButton |
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clicked, pressed, released, toggled |
Fields inherited from class com.trolltech.qt.gui.QWidget |
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customContextMenuRequested |
Constructor Summary | |
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QRadioButton()
Equivalent to QRadioButton(0). |
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QRadioButton(QWidget parent)
Constructs a radio button with the given parent, but with no text or pixmap. |
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QRadioButton(java.lang.String text)
Equivalent to QRadioButton(text, 0). |
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QRadioButton(java.lang.String text,
QWidget parent)
Constructs a radio button with the given parent and a text string. |
Method Summary | |
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boolean |
event(QEvent e)
This function is reimplemented for internal reasons. |
static QRadioButton |
fromNativePointer(QNativePointer nativePointer)
This function returns the QRadioButton instance pointed to by nativePointer |
protected boolean |
hitButton(QPoint arg__1)
This function is reimplemented for internal reasons. |
protected void |
initStyleOption(QStyleOptionButton option)
Initialize option with the values from this QRadioButton. |
protected void |
mouseMoveEvent(QMouseEvent arg__1)
This function is reimplemented for internal reasons. |
protected void |
paintEvent(QPaintEvent arg__1)
This function is reimplemented for internal reasons. |
QSize |
sizeHint()
This function is reimplemented for internal reasons. |
Methods inherited from class com.trolltech.qt.gui.QAbstractButton |
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animateClick, animateClick, autoExclusive, autoRepeat, autoRepeatDelay, autoRepeatInterval, changeEvent, checkStateSet, click, focusInEvent, focusOutEvent, group, icon, iconSize, isCheckable, isChecked, isDown, keyPressEvent, keyReleaseEvent, mousePressEvent, mouseReleaseEvent, nextCheckState, setAutoExclusive, setAutoRepeat, setAutoRepeatDelay, setAutoRepeatInterval, setCheckable, setChecked, setDown, setIcon, setIconSize, setShortcut, setShortcut, setShortcut, setText, shortcut, text, timerEvent, toggle |
Methods inherited from class com.trolltech.qt.core.QObject |
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blockSignals, childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, property, removeEventFilter, setObjectName, setParent, setProperty, signalsBlocked, startTimer, thread |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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disconnect, disconnect, signalSender |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
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public QRadioButton(java.lang.String text)
Equivalent to QRadioButton(text, 0).
public QRadioButton(java.lang.String text, QWidget parent)
Constructs a radio button with the given parent and a text string.
The parent argument is passed on to the QAbstractButton constructor.
public QRadioButton()
Equivalent to QRadioButton(0).
public QRadioButton(QWidget parent)
Constructs a radio button with the given parent, but with no text or pixmap.
The parent argument is passed on to the QAbstractButton constructor.
Method Detail |
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public boolean event(QEvent e)
This function is reimplemented for internal reasons.
event
in class QAbstractButton
protected boolean hitButton(QPoint arg__1)
This function is reimplemented for internal reasons.
hitButton
in class QAbstractButton
protected void mouseMoveEvent(QMouseEvent arg__1)
This function is reimplemented for internal reasons.
mouseMoveEvent
in class QAbstractButton
Example
protected void paintEvent(QPaintEvent arg__1)
This function is reimplemented for internal reasons.
paintEvent
in class QAbstractButton
public QSize sizeHint()
This function is reimplemented for internal reasons.
sizeHint
in class QWidget
public static QRadioButton fromNativePointer(QNativePointer nativePointer)
nativePointer
- the QNativePointer of which object should be returned.protected final void initStyleOption(QStyleOptionButton option)
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