Wt::WRadioButton Class Reference

A user control that represents a radio button. More...

#include <Wt/WRadioButton>

Inheritance diagram for Wt::WRadioButton:

Public Member Functions
	WRadioButton (WContainerWidget *parent=0)
	Creates an unchecked radio button with empty label and optional parent.
	WRadioButton (const WString &text, WContainerWidget *parent=0)
	Creates an unchecked radio button with given text and optional parent.
	~WRadioButton ()
	Destructor.
WButtonGroup *	group () const
	Returns the button group.
Public Member Functions inherited from Wt::WAbstractToggleButton
virtual	~WAbstractToggleButton ()
	Destructor.
void	setText (const WString &text)
	Sets the label text.
const WString	text () const
	Returns the label text.
bool	isChecked () const
	Returns the button state.
void	setChecked (bool checked)
	Sets the button state.
virtual void	setChecked ()
	Checks the button.
virtual void	setUnChecked ()
	Unchecks the button.
virtual WString	valueText () const
	Returns the current value.
virtual void	setValueText (const WString &text)
	Sets the current value.
EventSignal &	checked ()
	Signal emitted when the button gets checked.
EventSignal &	unChecked ()
	Signal emitted when the button gets unChecked.
Public Member Functions inherited from Wt::WFormWidget
	WFormWidget (WContainerWidget *parent=0)
	Creates a WFormWidget with an optional parent.
	~WFormWidget ()
	Destructor.
WLabel *	label () const
	Returns the label associated with this widget.
virtual void	setHidden (bool hidden, const WAnimation &animation=WAnimation())
	Sets the hidden state of this widget.
void	setValidator (WValidator *validator)
	Sets a validator for this field.
WValidator *	validator () const
	Returns the validator.
virtual WValidator::State	validate ()
	Validates the field.
void	setEnabled (bool enabled)
	Sets whether the widget is enabled.
void	setFocus ()
	Gives focus.
void	setFocus (bool focus)
	Changes focus.
bool	hasFocus () const
	Returns whether this widget has focus.
virtual void	setTabIndex (int index)
	Sets the tab index.
virtual int	tabIndex () const
	Returns the tab index.
void	setReadOnly (bool readOnly)
	Sets the element read-only.
bool	isReadOnly () const
	Returns whether the form element is read-only.
void	setEmptyText (const WString &emptyText)
	Sets the empty text to be shown when the field is empty.
const WString &	emptyText ()
	Returns the empty text to be shown when the field is empty.
EventSignal &	changed ()
	Signal emitted when the value was changed.
EventSignal &	selected ()
	Signal emitted when ??
EventSignal &	blurred ()
	Signal emitted when the widget lost focus.
EventSignal &	focussed ()
	Signal emitted when the widget recieved focus.
virtual void	refresh ()
	Refresh the widget.
Public Member Functions inherited from Wt::WInteractWidget
	WInteractWidget (WContainerWidget *parent=0)
	Create an InteractWidget with optional parent.
EventSignal< WKeyEvent > &	keyWentDown ()
	Event signal emitted when a keyboard key is pushed down.
EventSignal< WKeyEvent > &	keyPressed ()
	Event signal emitted when a "character" was entered.
EventSignal< WKeyEvent > &	keyWentUp ()
	Event signal emitted when a keyboard key is released.
EventSignal &	enterPressed ()
	Event signal emitted when enter was pressed.
EventSignal &	escapePressed ()
	Event signal emitted when escape was pressed.
EventSignal< WMouseEvent > &	clicked ()
	Event signal emitted when a mouse key was clicked on this widget.
EventSignal< WMouseEvent > &	doubleClicked ()
	Event signal emitted when a mouse key was double clicked on this widget.
EventSignal< WMouseEvent > &	mouseWentDown ()
	Event signal emitted when a mouse key was pushed down on this widget.
EventSignal< WMouseEvent > &	mouseWentUp ()
	Event signal emitted when a mouse key was released on this widget.
EventSignal< WMouseEvent > &	mouseWentOut ()
	Event signal emitted when the mouse went out of this widget.
EventSignal< WMouseEvent > &	mouseWentOver ()
	Event signal emitted when the mouse entered this widget.
EventSignal< WMouseEvent > &	mouseMoved ()
	Event signal emitted when the mouse moved over this widget.
EventSignal< WMouseEvent > &	mouseDragged ()
	Event signal emitted when the mouse is dragged over this widget.
EventSignal< WMouseEvent > &	mouseWheel ()
	Event signal emitted when the mouse scroll wheel was used.
EventSignal< WTouchEvent > &	touchStarted ()
	Event signal emitted when a finger is placed on the screen.
EventSignal< WTouchEvent > &	touchEnded ()
	Event signal emitted when a finger is removed from the screen.
EventSignal< WTouchEvent > &	touchMoved ()
	Event signal emitted when a finger, which is already placed on the screen, is moved across the screen.
EventSignal< WGestureEvent > &	gestureStarted ()
	Event signal emitted when a gesture is started.
EventSignal< WGestureEvent > &	gestureChanged ()
	Event signal emitted when a gesture is changed.
EventSignal< WGestureEvent > &	gestureEnded ()
	Event signal emitted when a gesture is ended.
void	setDraggable (const std::string &mimeType, WWidget *dragWidget=0, bool isDragWidgetOnly=false, WObject *sourceWidget=0)
	Configure dragging for drag and drop.
virtual void	load ()
	Loads content just before the widget is used.
virtual bool	isEnabled () const
	Returns whether the widget is enabled.
Public Member Functions inherited from Wt::WWebWidget
	WWebWidget (WContainerWidget *parent=0)
	Construct a WebWidget with a given parent.
virtual void	setPositionScheme (PositionScheme scheme)
	Sets the CSS position scheme.
virtual PositionScheme	positionScheme () const
	Returns the CSS position scheme.
virtual void	setOffsets (const WLength &offset, WFlags< Side > sides=All)
	Sets CSS offsets for a non-statically positioned widget.
virtual WLength	offset (Side s) const
	Returns a CSS offset.
virtual void	resize (const WLength &width, const WLength &height)
	Resizes the widget.
virtual WLength	width () const
	Returns the width.
virtual WLength	height () const
	Returns the height.
virtual void	setMinimumSize (const WLength &width, const WLength &height)
	Sets a minimum size.
virtual WLength	minimumWidth () const
	Returns the minimum width.
virtual WLength	minimumHeight () const
	Returns the minimum height.
virtual void	setMaximumSize (const WLength &width, const WLength &height)
	Sets a maximum size.
virtual WLength	maximumWidth () const
	Returns the maximum width.
virtual WLength	maximumHeight () const
	Returns the maximum height.
virtual void	setLineHeight (const WLength &height)
	Sets the CSS line height for contained text.
virtual WLength	lineHeight () const
	Returns the CSS line height for contained text.
virtual void	setFloatSide (Side s)
	Specifies a CSS float side.
virtual Side	floatSide () const
	Returns the CSS float side.
virtual void	setClearSides (WFlags< Side > sides)
	Sets the sides that should be cleared of floats.
virtual WFlags< Side >	clearSides () const
	Returns the sides that should remain empty.
virtual void	setMargin (const WLength &margin, WFlags< Side > sides=All)
	Sets CSS margins around the widget.
virtual WLength	margin (Side side) const
	Returns a CSS margin set.
virtual void	setHiddenKeepsGeometry (bool enabled)
	Sets whether the widget keeps its geometry when hidden.
virtual bool	hiddenKeepsGeometry () const
	Returns whether the widget keeps its geometry when hidden.
virtual bool	isHidden () const
	Returns whether the widget is set hidden.
virtual bool	isVisible () const
	Returns whether the widget is visible.
virtual void	setDisabled (bool disabled)
	Sets whether the widget is disabled.
virtual bool	isDisabled () const
	Returns whether the widget is set disabled.
virtual void	setPopup (bool popup)
	Lets the widget overlay over other sibling widgets.
virtual bool	isPopup () const
	Returns whether the widget is overlayed.
virtual void	setInline (bool isInline)
	Sets whether the widget is displayed inline or as a block.
virtual bool	isInline () const
	Returns whether the widget is displayed inline or as block.
virtual void	setDecorationStyle (const WCssDecorationStyle &style)
	Sets a CSS decoration style.
virtual WCssDecorationStyle &	decorationStyle ()
	Returns the decoration style of this widget.
virtual void	setStyleClass (const WString &styleClass)
	Sets (one or more) CSS style classes.
virtual WString	styleClass () const
	Returns the CSS style class.
virtual void	addStyleClass (const WString &styleClass, bool force=false)
	Adds a CSS style class.
virtual void	removeStyleClass (const WString &styleClass, bool force=false)
	Removes a CSS style class.
virtual void	setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength())
	Sets the vertical alignment.
virtual AlignmentFlag	verticalAlignment () const
	Returns the vertical alignment.
virtual WLength	verticalAlignmentLength () const
	Returns the fixed vertical alignment that was set.
virtual void	setToolTip (const WString &text, TextFormat textFormat=PlainText)
	Sets a tooltip.
virtual WString	toolTip () const
	Returns the tooltip.
virtual void	setAttributeValue (const std::string &name, const WString &value)
	Sets an attribute value.
virtual WString	attributeValue (const std::string &name) const
	Returns an attribute value.
virtual void	setJavaScriptMember (const std::string &name, const std::string &value)
	Sets a JavaScript member.
virtual std::string	javaScriptMember (const std::string &name) const
	Returns the value of a JavaScript member.
virtual void	callJavaScriptMember (const std::string &name, const std::string &args)
	Calls a JavaScript member.
virtual bool	loaded () const
	Returns whether this widget has been loaded.
virtual void	setId (const std::string &id)
	Sets the CSS Id.
virtual WWidget *	find (const std::string &name)
	Finds a descendent widget by name.
virtual void	setSelectable (bool selectable)
	Sets as selectable.
virtual void	doJavaScript (const std::string &javascript)
	Executes the given JavaScript statements when the widget is rendered or updated.
virtual const std::string	id () const
	Returns the (unique) identifier for this object.
void	setLoadLaterWhenInvisible (bool)
	Change the way the widget is loaded when invisible.
const std::vector< WWidget * > &	children () const
	Returns contained widgets.
Signal &	childrenChanged ()
	Signal emitted when children have been added or removed.
bool	isRendered () const
	Returns whether the widget is rendered.
Public Member Functions inherited from Wt::WWidget
virtual	~WWidget ()
	Destructor.
WWidget *	parent () const
	Returns the parent widget.
void	setWidth (const WLength &width)
	Sets the width.
void	setHeight (const WLength &height)
	Sets the height.
virtual void	positionAt (const WWidget *widget, Orientation orientation=Vertical)
	Positions a widget next to another widget.
std::string	jsRef () const
	Returns a JavaScript expression to the corresponding DOM node.
virtual void	acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())
	Sets a mime type to be accepted for dropping.
virtual void	stopAcceptDrops (const std::string &mimeType)
	Indicates that a mime type is no longer accepted for dropping.
virtual void	htmlText (std::ostream &out)
	Streams the (X)HTML representation.
void	hide ()
	Hides the widget.
void	animateHide (const WAnimation &animation)
	Hides the widget using an animation.
void	show ()
	Shows the widget.
void	animateShow (const WAnimation &animation)
	Shows the widget using an animation.
void	enable ()
	Enables the widget.
void	disable ()
	Disable thes widget.
bool	layoutSizeAware () const
	Returns whether the widget is layout size aware.
Public Member Functions inherited from Wt::WObject
	WObject (WObject *parent=0)
	Create a WObject with a given parent object.
virtual	~WObject ()
	Destructor.
void	setObjectName (const std::string &name)
	Sets an object name.
virtual std::string	objectName () const
	Returns the object name.
void	resetLearnedSlots ()
	Resets learned stateless slot implementations.
template<class T >
void	resetLearnedSlot (void(T::*method)())
	Resets a learned stateless slot implementation.
template<class T >
WStatelessSlot *	implementStateless (void(T::*method)())
	Declares a slot to be stateless and learn client-side behaviour on first invocation.
template<class T >
WStatelessSlot *	implementStateless (void(T::*method)(), void(T::*undoMethod)())
	Declares a slot to be stateless and learn client-side behaviour in advance.
template<class T >
WStatelessSlot *	implementJavaScript (void(T::*method)(), const std::string &jsCode)
	Provides a JavaScript implementation for a method.
void	addChild (WObject *child)
	Adds a child object.

Additional Inherited Members
Public Types inherited from Wt::WObject
typedef void(WObject::*	Method )()
	Typedef for a WObject method without arguments.
Static Public Member Functions inherited from Wt::WWebWidget
static WString	escapeText (const WString &text, bool newlinesToo=false)
	Escape HTML control characters in the text, to display literally (deprecated).
static std::string &	escapeText (std::string &text, bool newlinestoo=false)
	Escape HTML control characters in the text, to display literally (deprecated).
static bool	removeScript (WString &text)
	Remove tags/attributes from text that are not passive (deprecated).
static std::string	jsStringLiteral (const std::string &v, char delimiter= '\'')
	Turn a UTF8 encoded string into a JavaScript string literal.
Protected Member Functions inherited from Wt::WAbstractToggleButton
	WAbstractToggleButton (WContainerWidget *parent=0)
	Creates an unchecked toggle button without label.
	WAbstractToggleButton (const WString &text, WContainerWidget *parent=0)
	Creates an unchecked toggle button with given text label.
virtual WStatelessSlot *	getStateless (Method method)
	On-demand stateless slot implementation.
Static Protected Member Functions inherited from Wt::WObject
static WObject *	sender ()
	Returns the sender of the current slot call.

Detailed Description

A user control that represents a radio button.

Use a WButtonGroup to group together radio buttons that reflect options that are mutually exclusive.

Usage example:

enum Vote { Republican = 1, Democrate = 2, NoVote = 10 };

// use a group box as widget container for 3 radio buttons, with a title
Wt::WGroupBox *container = new Wt::WGroupBox("USA elections vote");

// use a button group to logically group the 3 options
Wt::WButtonGroup *group = new Wt::WButtonGroup(this);

Wt::WRadioButton *button;
button = new Wt::WRadioButton("I voted Republican", container);
new Wt::WBreak(container);
group->addButton(button, Republican);

button = new Wt::WRadioButton("I voted Democrat", container);
new Wt::WBreak(container);
group->addButton(button, Democrate);

button = new Wt::WRadioButton("I didn't vote", container);
new Wt::WBreak(container);
group->addButton(button, NoVote);

group->setCheckedButton(group->button(NoVote));

WRadioButton is an inline widget.

CSS

This widget corresponds to the HTML <input type="radio"> tag. Depending on whether a text is included, it may be nested in a <span> tag which also includes a rendered WLabel. This widget does not provide styling, and can be styled using inline or external CSS as appropriate.

See Also

WAbstractToggleButton, WButtonGroup

Member Function Documentation

WButtonGroup* Wt::WRadioButton::group

(

)

const

Returns the button group.

Returns the button group to which this button belongs.

See Also

WButtonGroup::addButton(WRadioButton *, int)