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QButton(3qt)									     QButton(3qt)

NAME
       QButton - The abstract base class of button widgets, providing functionality common to
       buttons

SYNOPSIS
       #include <qbutton.h>

       Inherits QWidget.

       Inherited by QCheckBox, QPushButton, QRadioButton, and QToolButton.

   Public Members
       QButton ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )
       ~QButton ()
       QString text () const
       virtual void setText ( const QString & )
       const QPixmap * pixmap () const
       virtual void setPixmap ( const QPixmap & )
       QKeySequence accel () const
       virtual void setAccel ( const QKeySequence & )
       bool isToggleButton () const
       enum ToggleType { SingleShot, Toggle, Tristate }
       ToggleType toggleType () const
       virtual void setDown ( bool )
       bool isDown () const
       bool isOn () const
       enum ToggleState { Off, NoChange, On }
       ToggleState state () const
       bool autoResize () const  (obsolete)
       void setAutoResize ( bool )  (obsolete)
       bool autoRepeat () const
       virtual void setAutoRepeat ( bool )
       bool isExclusiveToggle () const
       QButtonGroup * group () const

   Public Slots
       void animateClick ()
       void toggle ()

   Signals
       void pressed ()
       void released ()
       void clicked ()
       void toggled ( bool on )
       void stateChanged ( int state )

   Properties
       QKeySequence accel - the accelerator associated with the button
       bool autoRepeat - whether autoRepeat is enabled
       bool autoResize - whether autoResize is enabled	(obsolete)
       bool down - whether the button is pressed
       bool exclusiveToggle - whether the button is an exclusive toggle  (read only)
       bool on - whether the button is toggled	(read only)
       QPixmap pixmap - the pixmap shown on the button
       QString text - the text shown on the button
       bool toggleButton - whether the button is a toggle button  (read only)
       ToggleState toggleState - the state of the toggle button  (read only)
       ToggleType toggleType - the type of toggle on the button  (read only)

   Protected Members
       void setToggleButton ( bool b )
       virtual void setToggleType ( ToggleType type )
       void setOn ( bool on )
       virtual void setState ( ToggleState s )
       virtual bool hitButton ( const QPoint & pos ) const
       virtual void drawButton ( QPainter * )
       virtual void drawButtonLabel ( QPainter * )
       virtual void paintEvent ( QPaintEvent * )

DESCRIPTION
       The QButton class is the abstract base class of button widgets, providing functionality
       common to buttons.

       If you want to create a button use QPushButton.

       The QButton class implements an abstract button, and lets subclasses specify how to reply
       to user actions and how to draw the button.

       QButton provides both push and toggle buttons. The QRadioButton and QCheckBox classes
       provide only toggle buttons; QPushButton and QToolButton provide both toggle and push
       buttons.

       Any button can have either a text or pixmap label. setText() sets the button to be a text
       button and setPixmap() sets it to be a pixmap button. The text/pixmap is manipulated as
       necessary to create the "disabled" appearance when the button is disabled.

       QButton provides most of the states used for buttons:

       isDown() indicates whether the button is pressed down.

       isOn() indicates whether the button is on. Only toggle buttons can be switched on and off
       (see below).

       isEnabled() indicates whether the button can be pressed by the user.

       setAutoRepeat() sets whether the button will auto-repeat if the user holds it down.

       setToggleButton() sets whether the button is a toggle button or not.

       The difference between isDown() and isOn() is as follows: When the user clicks a toggle
       button to toggle it on, the button is first pressed and then released into the on state.
       When the user clicks it again (to toggle it off), the button moves first to the pressed
       state, then to the off state (isOn() and isDown() are both FALSE).

       Default buttons (as used in many dialogs) are provided by QPushButton::setDefault() and
       QPushButton::setAutoDefault().

       QButton provides five signals: <ol type=1>

       pressed() is emitted when the button is pressed. E.g. with the mouse or when
       animateClick() is called.

       released() is emitted when the button is released. E.g. when the mouse is released or the
       cursor is moved outside the widget.

       clicked() is emitted when the button is first pressed and then released when the
       accelerator key is typed, or when animateClick() is called.

       toggled(bool) is emitted when the state of a toggle button changes.

       stateChanged(int) is emitted when the state of a tristate toggle button changes.

       If the button is a text button with an ampersand (&) in its text, QButton creates an
       automatic accelerator key. This code creates a push button labelled "Ro<u>c</u>k & Roll"
       (where the c is underlined). The button gets an automatic accelerator key, Alt+C:

	       QPushButton *p = new QPushButton( "Ro&ck && Roll", this );

       In this example, when the user presses Alt+C the button will call animateClick().

       You can also set a custom accelerator using the setAccel() function. This is useful mostly
       for pixmap buttons because they have no automatic accelerator.

	       p->setPixmap( QPixmap("print.png") );
	       p->setAccel( ALT+Key_F7 );

       All of the buttons provided by Qt (QPushButton, QToolButton, QCheckBox and QRadioButton)
       can display both text and pixmaps.

       To subclass QButton, you must reimplement at least drawButton() (to draw the button's
       outline) and drawButtonLabel() (to draw its text or pixmap). It is generally advisable to
       reimplement sizeHint() as well, and sometimes hitButton() (to determine whether a button
       press is within the button).

       To reduce flickering, QButton::paintEvent() sets up a pixmap that the drawButton()
       function draws in. You should not reimplement paintEvent() for a subclass of QButton
       unless you want to take over all drawing.

       See also QButtonGroup and Abstract Widget Classes.

   Member Type Documentation
QButton::ToggleState
       This enum defines the state of a toggle button.

       QButton::Off - the button is in the "off" state

       QButton::NoChange - the button is in the default/unchanged state

       QButton::On - the button is in the "on" state

QButton::ToggleType
       This enum type defines what a button can do in response to a mouse/keyboard press:

       QButton::SingleShot - pressing the button causes an action, then the button returns to the
       unpressed state.

       QButton::Toggle - pressing the button toggles it between an On and an Off state.

       QButton::Tristate - pressing the button cycles between the three states On, Off and
       NoChange

MEMBER FUNCTION DOCUMENTATION
QButton::QButton ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )
       Constructs a standard button called name with parent parent, using the widget flags f.

       If parent is a QButtonGroup, this constructor calls QButtonGroup::insert().

QButton::~QButton ()
       Destroys the button.

QKeySequence QButton::accel () const
       Returns the accelerator associated with the button. See the "accel" property for details.

void QButton::animateClick () [slot]
       Performs an animated click: the button is pressed and released a short while later.

       The pressed(), released(), clicked(), toggled(), and stateChanged() signals are emitted as
       appropriate.

       This function does nothing if the button is disabled.

       See also accel.

bool QButton::autoRepeat () const
       Returns TRUE if autoRepeat is enabled; otherwise returns FALSE. See the "autoRepeat"
       property for details.

bool QButton::autoResize () const
       Returns TRUE if autoResize is enabled; otherwise returns FALSE. See the "autoResize"
       property for details.

void QButton::clicked () [signal]
       This signal is emitted when the button is activated (i.e. first pressed down and then
       released when the mouse cursor is inside the button), when the accelerator key is typed or
       when animateClick() is called. This signal is not emitted if you call setDown().

       The QButtonGroup::clicked() signal does the same job, if you want to connect several
       buttons to the same slot.

       Warning: Don't launch a model dialog in response to this signal for a button that has
       autoRepeat turned on.

       See also pressed(), released(), toggled(), autoRepeat, and down.

       Examples:

void QButton::drawButton ( QPainter * ) [virtual protected]
       Draws the button. The default implementation does nothing.

       This virtual function is reimplemented by subclasses to draw real buttons. At some point,
       these reimplementations should call drawButtonLabel().

       See also drawButtonLabel() and paintEvent().

void QButton::drawButtonLabel ( QPainter * ) [virtual protected]
       Draws the button text or pixmap.

       This virtual function is reimplemented by subclasses to draw real buttons. It is invoked
       by drawButton().

       See also drawButton() and paintEvent().

QButtonGroup * QButton::group () const
       Returns the group that this button belongs to.

       If the button is not a member of any QButtonGroup, this function returns 0.

       See also QButtonGroup.

bool QButton::hitButton ( const QPoint & pos ) const [virtual protected]
       Returns TRUE if pos is inside the clickable button rectangle; otherwise returns FALSE.

       By default, the clickable area is the entire widget. Subclasses may reimplement it,
       though.

bool QButton::isDown () const
       Returns TRUE if the button is pressed; otherwise returns FALSE. See the "down" property
       for details.

bool QButton::isExclusiveToggle () const
       Returns TRUE if the button is an exclusive toggle; otherwise returns FALSE. See the
       "exclusiveToggle" property for details.

bool QButton::isOn () const
       Returns TRUE if the button is toggled; otherwise returns FALSE. See the "on" property for
       details.

bool QButton::isToggleButton () const
       Returns TRUE if the button is a toggle button; otherwise returns FALSE. See the
       "toggleButton" property for details.

void QButton::paintEvent ( QPaintEvent * ) [virtual protected]
       Handles paint events for buttons. Small and typically complex buttons are painted double-
       buffered to reduce flicker. The actually drawing is done in the virtual functions
       drawButton() and drawButtonLabel().

       See also drawButton() and drawButtonLabel().

       Reimplemented from QWidget.

const QPixmap * QButton::pixmap () const
       Returns the pixmap shown on the button. See the "pixmap" property for details.

void QButton::pressed () [signal]
       This signal is emitted when the button is pressed down.

       See also released() and clicked().

       Examples:

void QButton::released () [signal]
       This signal is emitted when the button is released.

       See also pressed(), clicked(), and toggled().

void QButton::setAccel ( const QKeySequence & ) [virtual]
       Sets the accelerator associated with the button. See the "accel" property for details.

void QButton::setAutoRepeat ( bool ) [virtual]
       Sets whether autoRepeat is enabled. See the "autoRepeat" property for details.

void QButton::setAutoResize ( bool )
       Sets whether autoResize is enabled. See the "autoResize" property for details.

void QButton::setDown ( bool ) [virtual]
       Sets whether the button is pressed. See the "down" property for details.

void QButton::setOn ( bool on ) [protected]
       Sets the state of this button to On if on is TRUE; otherwise to Off.

       See also toggleState.

void QButton::setPixmap ( const QPixmap & ) [virtual]
       Sets the pixmap shown on the button. See the "pixmap" property for details.

void QButton::setState ( ToggleState s ) [virtual protected]
       Sets the toggle state of the button to s. s can be Off, NoChange or On.

void QButton::setText ( const QString & ) [virtual]
       Sets the text shown on the button. See the "text" property for details.

void QButton::setToggleButton ( bool b ) [protected]
       If b is TRUE, this button becomes a toggle button; if b is FALSE, this button becomes a
       command button.

       See also toggleButton.

void QButton::setToggleType ( ToggleType type ) [virtual protected]
       Sets the toggle type of the button to type.

       type can be set to SingleShot, Toggle and Tristate.

ToggleState QButton::state () const
       Returns the state of the toggle button. See the "toggleState" property for details.

void QButton::stateChanged ( int state ) [signal]
       This signal is emitted whenever a toggle button changes state. state is On if the button
       is on, NoChange if it is in the" no change" state or Off if the button is off.

       This may be the result of a user action, toggle() slot activation, setState(), or because
       setOn() was called.

       See also clicked() and QButton::ToggleState.

QString QButton::text () const
       Returns the text shown on the button. See the "text" property for details.

void QButton::toggle () [slot]
       Toggles the state of a toggle button.

       See also on, setOn(), toggled(), and toggleButton.

ToggleType QButton::toggleType () const
       Returns the type of toggle on the button. See the "toggleType" property for details.

void QButton::toggled ( bool on ) [signal]
       This signal is emitted whenever a toggle button changes status. on is TRUE if the button
       is on, or FALSE if the button is off.

       This may be the result of a user action, toggle() slot activation, or because setOn() was
       called.

       See also clicked().

       Example: listbox/listbox.cpp.

   Property Documentation
QKeySequence accel
       This property holds the accelerator associated with the button.

       This property is 0 if there is no accelerator set. If you set this property to 0 then any
       current accelerator is removed.

       Set this property's value with setAccel() and get this property's value with accel().

bool autoRepeat
       This property holds whether autoRepeat is enabled.

       If autoRepeat is enabled then the clicked() signal is emitted at regular intervals if the
       button is down. This property has no effect on toggle buttons. autoRepeat is off by
       default.

       Set this property's value with setAutoRepeat() and get this property's value with
       autoRepeat().

bool autoResize
       This property holds whether autoResize is enabled.

       This property is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       If autoResize is enabled then the button will resize itself whenever the contents are
       changed.

       Set this property's value with setAutoResize() and get this property's value with
       autoResize().

bool down
       This property holds whether the button is pressed.

       If this property is TRUE, the button is pressed down. The signals pressed() and clicked()
       are not emitted if you set this property to TRUE. The default is FALSE.

       Set this property's value with setDown() and get this property's value with isDown().

bool exclusiveToggle
       This property holds whether the button is an exclusive toggle.

       If this property is TRUE and the button is in a QButtonGroup, the button can only be
       toggled off by another one being toggled on. The default is FALSE.

       Get this property's value with isExclusiveToggle().

bool on
       This property holds whether the button is toggled.

       This property should only be set for toggle buttons.

       Get this property's value with isOn().

QPixmap pixmap
       This property holds the pixmap shown on the button.

       If the pixmap is monochrome (i.e. it is a QBitmap or its depth is 1) and it does not have
       a mask, this property will set the pixmap to be its own mask. The purpose of this is to
       draw transparent bitmaps which are important for toggle buttons, for example.

       pixmap() returns 0 if no pixmap was set.

       Set this property's value with setPixmap() and get this property's value with pixmap().

QString text
       This property holds the text shown on the button.

       This property will return a QString::null if the button has no text. If the text has an
       ampersand (&) in it, then an accelerator is automatically created for it using the
       character that follows the '&' as the accelerator key. Any previous accelerator will be
       overwritten, or cleared if no accelerator is defined by the text.

       There is no default text.

       Set this property's value with setText() and get this property's value with text().

bool toggleButton
       This property holds whether the button is a toggle button.

       The default value is FALSE.

       Get this property's value with isToggleButton().

ToggleState toggleState
       This property holds the state of the toggle button.

       If this property is changed then it does not cause the button to be repainted.

       Get this property's value with state().

ToggleType toggleType
       This property holds the type of toggle on the button.

       The default toggle type is SingleShot.

       See also QButton::ToggleType.

       Get this property's value with toggleType().

SEE ALSO
       http://doc.trolltech.com/qbutton.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file
       included in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qbutton.3qt) and the Qt version (3.3.8).

Trolltech AS				 2 February 2007			     QButton(3qt)
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