This signal is emitted when a button in the group is  \link QButton::pressed() pressed\endlink.  The \e id argument is the button's identifier.*//*!  \fn void QButtonGroup::released( int id )  This signal is emitted when a button in the group is  \link QButton::released() released\endlink.  The \e id argument is the button's identifier.*//*!  \fn void QButtonGroup::clicked( int id )  This signal is emitted when a button in the group is  \link QButton::clicked() clicked\endlink.  The \e id argument is the button's identifier.*//*!  \internal  This slot is activated when one of the buttons in the group emits the  QButton::pressed() signal.*/void QButtonGroup::buttonPressed(){    // introduce a QButtonListIt if calling anything    int id = -1;    QButton *bt = (QButton *)sender();		// object that sent the signal    for ( register QButtonItem *i=buttons->first(); i; i=buttons->next() )	if ( bt == i->button ) {		// button was clicked	    id = i->id;	    break;	}    if ( id != -1 )	emit pressed( id );}/*!  \internal  This slot is activated when one of the buttons in the group emits the  QButton::released() signal.*/void QButtonGroup::buttonReleased(){    // introduce a QButtonListIt if calling anything    int id = -1;    QButton *bt = (QButton *)sender();		// object that sent the signal    for ( register QButtonItem *i=buttons->first(); i; i=buttons->next() )	if ( bt == i->button ) {		// button was clicked	    id = i->id;	    break;	}    if ( id != -1 )	emit released( id );}/*!  \internal  This slot is activated when one of the buttons in the group emits the  QButton::clicked() signal.*/void QButtonGroup::buttonClicked(){    // introduce a QButtonListIt if calling anything    int id = -1;    QButton *bt = (QButton *)sender();		// object that sent the signal#if defined(CHECK_NULL)    ASSERT( bt->inherits("QButton") );#endif    for ( register QButtonItem *i=buttons->first(); i; i=buttons->next() ) {	if ( bt == i->button ) {			// button was clicked	    id = i->id;	    break;	}    }    if ( id != -1 )	emit clicked( id );}/*!  \internal  This slot is activated when one of the buttons in the group emits the  QButton::toggled() signal.*/void QButtonGroup::buttonToggled( bool on ){    // introduce a QButtonListIt if calling anything    if ( !on || !excl_grp && !radio_excl )	return;    QButton *bt = (QButton *)sender();		// object that sent the signal#if defined(CHECK_NULL)    ASSERT( bt->inherits("QButton") );    ASSERT( bt->isToggleButton() );#endif    if ( !excl_grp && !bt->inherits("QRadioButton") )	return;    QButtonItem * i = buttons->first();    bool hasTabFocus = FALSE;    while( i != 0 && hasTabFocus == FALSE ) {	if ( ( excl_grp || i->button->inherits("QRadioButton") ) &&	     (i->button->focusPolicy() & TabFocus) )	    hasTabFocus = TRUE;	i = buttons->next();    }    i = buttons->first();    while( i ) {	if ( bt != i->button &&	     i->button->isToggleButton() &&	     i->button->isOn() &&	     ( excl_grp || i->button->inherits( "QRadioButton" ) ) )	    i->button->setOn( FALSE );#ifdef QT_KEYPAD_MODE	if( !qt_modalEditingEnabled )#endif	if ( ( excl_grp || i->button->inherits( "QRadioButton" ) ) &&	     i->button->isToggleButton() &&	     hasTabFocus )	    i->button->setFocusPolicy( (FocusPolicy)(i->button->focusPolicy() &						     ~TabFocus) );	i = buttons->next();    }#ifdef QT_KEYPAD_MODE    if( !qt_modalEditingEnabled )#endif    if ( hasTabFocus )	bt->setFocusPolicy( (FocusPolicy)(bt->focusPolicy() | TabFocus) );}/*!  Sets the button with id \a id to be on, and if this is an  exclusive group, all other button in the group to be off.*/void QButtonGroup::setButton( int id ){    QButton * b = find( id );    if ( b )	b->setOn( TRUE );}/*!  \fn bool QButtonGroup::isRadioButtonExclusive () const  Returns whether this button group will treat radio buttons as  mutually exclusive. The default is TRUE.  \sa setRadioButtonExclusive()*//*!  If \a on is TRUE, this button group will treat radio buttons as  mutually exclusive, and other buttons according to  isExclusive(). */void QButtonGroup::setRadioButtonExclusive( bool on){    radio_excl = on;}/*!  Moves the keyboard focus according to \a key, and if appropriate  checks the new focus item.  This function does nothing unless the keyboard focus points to one  of the button group members and \a key is one of \c Key_Up, \c  Key_Down, \c Key_Left and \c Key_Right.*/void QButtonGroup::moveFocus( int key ){    QWidget * f = qApp->focusWidget();    QButtonItem * i;    i = buttons->first();    while( i && i->button != f )	i = buttons->next();    if ( !i || !i->button )	return;    QWidget * candidate = 0;    int bestScore = -1;    QPoint goal( f->mapToGlobal( f->geometry().center() ) );    i = buttons->first();    while( i && i->button ) {	if ( i->button != f &&	     i->button->isEnabled() ) {	    QPoint p(i->button->mapToGlobal(i->button->geometry().center()));	    int score = (p.y() - goal.y())*(p.y() - goal.y()) +			(p.x() - goal.x())*(p.x() - goal.x());	    switch( key ) {	    case Key_Up:		if ( p.y() < goal.y() &&		     QABS( p.x() - goal.x() ) < QABS( p.y() - goal.y() ) &&		     ( score < bestScore || !candidate ) ) {		    candidate = i->button;		    bestScore = score;		}		break;	    case Key_Down:		if ( p.y() > goal.y() &&		     QABS( p.x() - goal.x() ) < QABS( p.y() - goal.y() ) &&		     ( score < bestScore || !candidate ) ) {		    candidate = i->button;		    bestScore = score;		}		break;	    case Key_Left:		if ( p.x() < goal.x() &&		     QABS( p.y() - goal.y() ) < QABS( p.x() - goal.x() ) &&		     ( score < bestScore || !candidate ) ) {		    candidate = i->button;		    bestScore = score;		}		break;	    case Key_Right:		if ( p.x() > goal.x() &&		     QABS( p.y() - goal.y() ) < QABS( p.x() - goal.x() ) &&		     ( score < bestScore || !candidate ) ) {		    candidate = i->button;		    bestScore = score;		}		break;	    }	}	i = buttons->next();    }#ifdef QT_KEYPAD_MODE        if( !qt_modalEditingEnabled ) #endif    {	if ( candidate && f && f->inherits( "QButton" ) &&	     ((QButton*)f)->isOn() &&	     candidate->inherits( "QButton" ) &&	     ((QButton*)candidate)->isToggleButton() &&	     ( isExclusive() || ( f->inherits( "QRadioButton" ) &&				  candidate->inherits( "QRadioButton" )))) {	    if ( f->focusPolicy() & TabFocus ) {		f->setFocusPolicy( (FocusPolicy)(f->focusPolicy() & ~TabFocus) );		candidate->setFocusPolicy( (FocusPolicy)(candidate->focusPolicy()|							 TabFocus) );	    }	    ((QButton*)candidate)->setOn( TRUE );	    ((QButton*)candidate)->animateClick();	    ((QButton*)candidate)->animateTimeout(); // ### crude l&f hack	}	if ( candidate )	    candidate->setFocus();    }#ifdef QT_KEYPAD_MODE    if( qt_modalEditingEnabled ) {	if ( candidate ) {	    candidate->setFocus();	} else {	    switch( key ) {		case Key_Left:		case Key_Up:		    focusNextPrevChild( FALSE );		    break;		case Key_Right:		case Key_Down:		    focusNextPrevChild( TRUE );		    break;		default:		    break;	    }	}    }#endif}/*!  Returns a pointer to the selected radio button in this group, if  one exists, or 0 if there is no selected radio button in this group.  <b>Warning: </b>In future versions of Qt, the selected toggle button will be returned.*/QButton * QButtonGroup::selected(){    if ( !buttons )	return 0;    QButtonListIt it( *buttons );    QButtonItem *i;    while( (i=it.current()) != 0 ) {	++it;	if ( i->button && i->button->inherits("QRadioButton") &&	     i->button->isToggleButton() && i->button->isOn() )	    return i->button;    }    return 0;}/*! Returns the id of \a button, or -1 if \a button is not a member of  this group.*/int QButtonGroup::id( QButton * button ) const{    QButtonItem *i = buttons->first();    while ( i && i->button != button )	i = buttons->next();    return i ? i->id : -1;}#endif