No unused parameters, added a newline at the end

1 files changed, 2 insertions, 0 deletions

diff --git a/libqtaux/qcolordialog.cpp b/libqtaux/qcolordialog.cpp
index ccef0ad..830fef6 100644
--- a/libqtaux/qcolordialog.cpp
+++ b/libqtaux/qcolordialog.cpp
@@ -722,768 +722,770 @@ private:
 
 static int pWidth = 200;
 static int pHeight = 200;
 
 class QColorLuminancePicker : public QWidget
 {
     Q_OBJECT
 public:
     QColorLuminancePicker(QWidget* parent=0, const char* name=0);
     ~QColorLuminancePicker();
 
 public slots:
     void setCol( int h, int s, int v );
     void setCol( int h, int s );
 
 signals:
     void newHsv( int h, int s, int v );
 
 protected:
 //    QSize sizeHint() const;
 //    QSizePolicy sizePolicy() const;
     void paintEvent( QPaintEvent*);
     void mouseMoveEvent( QMouseEvent * );
     void mousePressEvent( QMouseEvent * );
 
 private:
     enum { foff = 3, coff = 4 }; //frame and contents offset
     int val;
     int hue;
     int sat;
 
     int y2val( int y );
     int val2y( int val );
     void setVal( int v );
 
     QPixmap *pix;
 };
 
 
 int QColorLuminancePicker::y2val( int y )
 {
     int d = height() - 2*coff - 1;
     return 255 - (y - coff)*255/d;
 }
 
 int QColorLuminancePicker::val2y( int v )
 {
     int d = height() - 2*coff - 1;
     return coff + (255-v)*d/255;
 }
 
 QColorLuminancePicker::QColorLuminancePicker(QWidget* parent,
 						  const char* name)
     :QWidget( parent, name )
 {
     hue = 100; val = 100; sat = 100;
     pix = 0;
     //    setBackgroundMode( NoBackground );
 }
 
 QColorLuminancePicker::~QColorLuminancePicker()
 {
     delete pix;
 }
 
 void QColorLuminancePicker::mouseMoveEvent( QMouseEvent *m )
 {
     setVal( y2val(m->y()) );
 }
 void QColorLuminancePicker::mousePressEvent( QMouseEvent *m )
 {
     setVal( y2val(m->y()) );
 }
 
 void QColorLuminancePicker::setVal( int v )
 {
     if ( val == v )
 	return;
     val = QMAX( 0, QMIN(v,255));
     delete pix; pix=0;
     repaint( FALSE ); //###
     emit newHsv( hue, sat, val );
 }
 
 //receives from a hue,sat chooser and relays.
 void QColorLuminancePicker::setCol( int h, int s )
 {
     setCol( h, s, val );
     emit newHsv( h, s, val );
 }
 
 void QColorLuminancePicker::paintEvent( QPaintEvent * )
 {
     int w = width() - 5;
 
     QRect r( 0, foff, w, height() - 2*foff );
     int wi = r.width() - 2;
     int hi = r.height() - 2;
     if ( !pix || pix->height() != hi || pix->width() != wi ) {
 	delete pix;
 	QImage img( wi, hi, 32 );
 	int y;
 	for ( y = 0; y < hi; y++ ) {
 	    QColor c( hue, sat, y2val(y+coff), QColor::Hsv );
 	    QRgb r = c.rgb();
 	    int x;
 	    for ( x = 0; x < wi; x++ )
 		img.setPixel( x, y, r );
 	}
 	pix = new QPixmap;
 	pix->convertFromImage(img);
     }
     QPainter p(this);
     p.drawPixmap( 1, coff, *pix );
     QColorGroup g = colorGroup();
     qDrawShadePanel( &p, r, g, TRUE );
     p.setPen( g.foreground() );
     p.setBrush( g.foreground() );
     QPointArray a;
     int y = val2y(val);
     a.setPoints( 3, w, y, w+5, y+5, w+5, y-5 );
     erase( w, 0, 5, height() );
     p.drawPolygon( a );
 }
 
 void QColorLuminancePicker::setCol( int h, int s , int v )
 {
     val = v;
     hue = h;
     sat = s;
     delete pix; pix=0;
     repaint( FALSE );//####
 }
 
 QPoint QColorPicker::colPt()
 { return QPoint( (360-hue)*(pWidth-1)/360, (255-sat)*(pHeight-1)/255 ); }
 int QColorPicker::huePt( const QPoint &pt )
 { return 360 - pt.x()*360/(pWidth-1); }
 int QColorPicker::satPt( const QPoint &pt )
 { return 255 - pt.y()*255/(pHeight-1) ; }
 void QColorPicker::setCol( const QPoint &pt )
 { setCol( huePt(pt), satPt(pt) ); }
 
 QColorPicker::QColorPicker(QWidget* parent, const char* name )
     : QFrame( parent, name )
 {
     hue = 0; sat = 0;
     setCol( 150, 255 );
 
     QImage img( pWidth, pHeight, 32 );
     int x,y;
     for ( y = 0; y < pHeight; y++ )
 	for ( x = 0; x < pWidth; x++ ) {
 	    QPoint p( x, y );
 	    img.setPixel( x, y, QColor(huePt(p), satPt(p),
 				       200, QColor::Hsv).rgb() );
 	}
     pix = new QPixmap;
     pix->convertFromImage(img);
     setBackgroundMode( NoBackground );
 }
 
 QColorPicker::~QColorPicker()
 {
     delete pix;
 }
 
 QSize QColorPicker::sizeHint() const
 {
     return QSize( pWidth + 2*frameWidth(), pHeight + 2*frameWidth() );
 }
 
 QSizePolicy QColorPicker::sizePolicy() const
 {
     return QSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
 }
 
 void QColorPicker::setCol( int h, int s )
 {
     int nhue = QMIN( QMAX(0,h), 360 );
     int nsat = QMIN( QMAX(0,s), 255);
     if ( nhue == hue && nsat == sat )
 	return;
     QRect r( colPt(), QSize(20,20) );
     hue = nhue; sat = nsat;
     r = r.unite( QRect( colPt(), QSize(20,20) ) );
     r.moveBy( contentsRect().x()-9, contentsRect().y()-9 );
     //    update( r );
     repaint( r, FALSE );
 }
 
 void QColorPicker::mouseMoveEvent( QMouseEvent *m )
 {
     QPoint p = m->pos() - contentsRect().topLeft();
     setCol( p );
     emit newCol( hue, sat );
 }
 
 void QColorPicker::mousePressEvent( QMouseEvent *m )
 {
     QPoint p = m->pos() - contentsRect().topLeft();
     setCol( p );
     emit newCol( hue, sat );
 }
 
 void QColorPicker::drawContents(QPainter* p)
 {
     QRect r = contentsRect();
 
     p->drawPixmap( r.topLeft(), *pix );
     QPoint pt = colPt() + r.topLeft();
     p->setPen( QPen(black) );
 
     p->fillRect( pt.x()-9, pt.y(), 20, 2, black );
     p->fillRect( pt.x(), pt.y()-9, 2, 20, black );
 
 }
 
 class QColorShowLabel;
 
 
 
 class QColIntValidator: public QIntValidator
 {
 public:
     QColIntValidator( int bottom, int top,
 		   QWidget * parent, const char *name = 0 )
 	:QIntValidator( bottom, top, parent, name ) {}
 
     QValidator::State validate( QString &, int & ) const;
 };
 
 QValidator::State QColIntValidator::validate( QString &s, int &pos ) const
 {
     State state = QIntValidator::validate(s,pos);
     if ( state == Valid ) {
 	long int val = s.toLong();
 	// This is not a general solution, assumes that top() > 0 and
 	// bottom >= 0
 	if ( val < 0 ) {
 	    s = "0";
 	    pos = 1;
 	} else if ( val > top() ) {
 	    s.setNum( top() );
 	    pos = s.length();
 	}
     }
     return state;
 }
 
 
 
 class QColNumLineEdit : public QLineEdit
 {
 public:
     QColNumLineEdit( QWidget *parent, const char* name = 0 )
 	: QLineEdit( parent, name ) { setMaxLength( 3 );}
     QSize sizeHint() const {
 	return QSize( 30, //#####
 		     QLineEdit::sizeHint().height() ); }
     void setNum( int i ) {
 	QString s;
 	s.setNum(i);
 	bool block = signalsBlocked();
 	blockSignals(TRUE);
 	setText( s );
 	blockSignals(block);
     }
     int val() const { return text().toInt(); }
 };
 
 
 class QColorShower : public QWidget
 {
     Q_OBJECT
 public:
     QColorShower( QWidget *parent, const char *name = 0 );
 
     //things that don't emit signals
     void setHsv( int h, int s, int v );
 
     int currentAlpha() const { return alphaEd->val(); }
     void setCurrentAlpha( int a ) { alphaEd->setNum( a ); }
     void showAlpha( bool b );
 
 
     QRgb currentColor() const { return curCol; }
 
 public slots:
     void setRgb( QRgb rgb );
 
 signals:
     void newCol( QRgb rgb );
 private slots:
     void rgbEd();
     void hsvEd();
 private:
     void showCurrentColor();
     int hue, sat, val;
     QRgb curCol;
     QColNumLineEdit *hEd;
     QColNumLineEdit *sEd;
     QColNumLineEdit *vEd;
     QColNumLineEdit *rEd;
     QColNumLineEdit *gEd;
     QColNumLineEdit *bEd;
     QColNumLineEdit *alphaEd;
     QLabel *alphaLab;
     QColorShowLabel *lab;
     bool rgbOriginal;
 };
 
 class QColorShowLabel : public QFrame
 {
     Q_OBJECT
 
 public:
     QColorShowLabel( QWidget *parent ) :QFrame( parent ) {
 	setFrameStyle( QFrame::Panel|QFrame::Sunken );
 	setBackgroundMode( PaletteBackground );
 	setAcceptDrops( TRUE );
 	mousePressed = FALSE;
     }
     void setColor( QColor c ) { col = c; }
 
 signals:
     void colorDropped( QRgb );
 
 protected:
     void drawContents( QPainter *p );
     void mousePressEvent( QMouseEvent *e );
     void mouseMoveEvent( QMouseEvent *e );
     void mouseReleaseEvent( QMouseEvent *e );
 #ifndef QT_NO_DRAGANDDROP
     void dragEnterEvent( QDragEnterEvent *e );
     void dragLeaveEvent( QDragLeaveEvent *e );
     void dropEvent( QDropEvent *e );
 #endif
 
 private:
     QColor col;
     bool mousePressed;
     QPoint pressPos;
 
 };
 
 void QColorShowLabel::drawContents( QPainter *p )
 {
     p->fillRect( contentsRect(), col );
 }
 
 void QColorShower::showAlpha( bool b )
 {
     if ( b ) {
 	alphaLab->show();
 	alphaEd->show();
     } else {
 	alphaLab->hide();
 	alphaEd->hide();
     }
 }
 
 void QColorShowLabel::mousePressEvent( QMouseEvent *e )
 {
     mousePressed = TRUE;
     pressPos = e->pos();
 }
 
 void QColorShowLabel::mouseMoveEvent( QMouseEvent *e )
 {
 #ifndef QT_NO_DRAGANDDROP
     if ( !mousePressed )
 	return;
     if ( ( pressPos - e->pos() ).manhattanLength() > QApplication::startDragDistance() ) {
 	QColorDrag *drg = new QColorDrag( col, this );
 	QPixmap pix( 30, 20 );
 	pix.fill( col );
 	QPainter p( &pix );
 	p.drawRect( 0, 0, pix.width(), pix.height() );
 	p.end();
 	drg->setPixmap( pix );
 	mousePressed = FALSE;
 	drg->dragCopy();
     }
+#else
+    Q_UNUSED( e )
 #endif
 }
 
 #ifndef QT_NO_DRAGANDDROP
 void QColorShowLabel::dragEnterEvent( QDragEnterEvent *e )
 {
     if ( QColorDrag::canDecode( e ) )
 	e->accept();
     else
 	e->ignore();
 }
 
 void QColorShowLabel::dragLeaveEvent( QDragLeaveEvent * )
 {
 }
 
 void QColorShowLabel::dropEvent( QDropEvent *e )
 {
     if ( QColorDrag::canDecode( e ) ) {
 	QColorDrag::decode( e, col );
 	repaint( FALSE );
 	emit colorDropped( col.rgb() );
 	e->accept();
     } else {
 	e->ignore();
     }
 }
 #endif // QT_NO_DRAGANDDROP
 
 void QColorShowLabel::mouseReleaseEvent( QMouseEvent * )
 {
     if ( !mousePressed )
 	return;
     mousePressed = FALSE;
 }
 
 QColorShower::QColorShower( QWidget *parent, const char *name )
     :QWidget( parent, name)
 {
     curCol = qRgb( -1, -1, -1 );
     QColIntValidator *val256 = new QColIntValidator( 0, 255, this );
     QColIntValidator *val360 = new QColIntValidator( 0, 360, this );
 
     QGridLayout *gl = new QGridLayout( this, 1, 1, 6 );
     lab = new QColorShowLabel( this );
     lab->setMinimumWidth( 60 ); //###
     gl->addMultiCellWidget(lab, 0,-1,0,0);
     connect( lab, SIGNAL( colorDropped(QRgb) ),
 	     this, SIGNAL( newCol(QRgb) ) );
     connect( lab, SIGNAL( colorDropped(QRgb) ),
 	     this, SLOT( setRgb(QRgb) ) );
 
     hEd = new QColNumLineEdit( this );
     hEd->setValidator( val360 );
     QLabel *l = new QLabel( hEd, QColorDialog::tr("Hu&e:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 0, 1 );
     gl->addWidget( hEd, 0, 2 );
 
     sEd = new QColNumLineEdit( this );
     sEd->setValidator( val256 );
     l = new QLabel( sEd, QColorDialog::tr("&Sat:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 1, 1 );
     gl->addWidget( sEd, 1, 2 );
 
     vEd = new QColNumLineEdit( this );
     vEd->setValidator( val256 );
     l = new QLabel( vEd, QColorDialog::tr("&Val:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 2, 1 );
     gl->addWidget( vEd, 2, 2 );
 
     rEd = new QColNumLineEdit( this );
     rEd->setValidator( val256 );
     l = new QLabel( rEd, QColorDialog::tr("&Red:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 0, 3 );
     gl->addWidget( rEd, 0, 4 );
 
     gEd = new QColNumLineEdit( this );
     gEd->setValidator( val256 );
     l = new QLabel( gEd, QColorDialog::tr("&Green:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 1, 3 );
     gl->addWidget( gEd, 1, 4 );
 
     bEd = new QColNumLineEdit( this );
     bEd->setValidator( val256 );
     l = new QLabel( bEd, QColorDialog::tr("Bl&ue:"), this );
     l->setAlignment( AlignRight|AlignVCenter );
     gl->addWidget( l, 2, 3 );
     gl->addWidget( bEd, 2, 4 );
 
     alphaEd = new QColNumLineEdit( this );
     alphaEd->setValidator( val256 );
     alphaLab = new QLabel( alphaEd, QColorDialog::tr("A&lpha channel:"), this );
     alphaLab->setAlignment( AlignRight|AlignVCenter );
     gl->addMultiCellWidget( alphaLab, 3, 3, 1, 3 );
     gl->addWidget( alphaEd, 3, 4 );
     alphaEd->hide();
     alphaLab->hide();
 
     connect( hEd, SIGNAL(textChanged(const QString&)), this, SLOT(hsvEd()) );
     connect( sEd, SIGNAL(textChanged(const QString&)), this, SLOT(hsvEd()) );
     connect( vEd, SIGNAL(textChanged(const QString&)), this, SLOT(hsvEd()) );
 
     connect( rEd, SIGNAL(textChanged(const QString&)), this, SLOT(rgbEd()) );
     connect( gEd, SIGNAL(textChanged(const QString&)), this, SLOT(rgbEd()) );
     connect( bEd, SIGNAL(textChanged(const QString&)), this, SLOT(rgbEd()) );
 }
 
 void QColorShower::showCurrentColor()
 {
     lab->setColor( currentColor() );
     lab->repaint(FALSE); //###
 }
 
 void QColorShower::rgbEd()
 {
     rgbOriginal = TRUE;
     curCol = qRgb( rEd->val(), gEd->val(), bEd->val() );
     rgb2hsv(currentColor(), hue, sat, val );
 
     hEd->setNum( hue );
     sEd->setNum( sat );
     vEd->setNum( val );
 
     showCurrentColor();
     emit newCol( currentColor() );
 }
 
 void QColorShower::hsvEd()
 {
     rgbOriginal = FALSE;
     hue = hEd->val();
     sat = sEd->val();
     val = vEd->val();
 
     curCol = QColor( hue, sat, val, QColor::Hsv ).rgb();
 
     rEd->setNum( qRed(currentColor()) );
     gEd->setNum( qGreen(currentColor()) );
     bEd->setNum( qBlue(currentColor()) );
 
     showCurrentColor();
     emit newCol( currentColor() );
 }
 
 void QColorShower::setRgb( QRgb rgb )
 {
     rgbOriginal = TRUE;
     curCol = rgb;
 
     rgb2hsv( currentColor(), hue, sat, val );
 
     hEd->setNum( hue );
     sEd->setNum( sat );
     vEd->setNum( val );
 
     rEd->setNum( qRed(currentColor()) );
     gEd->setNum( qGreen(currentColor()) );
     bEd->setNum( qBlue(currentColor()) );
 
     showCurrentColor();
 }
 
 void QColorShower::setHsv( int h, int s, int v )
 {
     rgbOriginal = FALSE;
     hue = h; val = v; sat = s; //Range check###
     curCol = QColor( hue, sat, val, QColor::Hsv ).rgb();
 
     hEd->setNum( hue );
     sEd->setNum( sat );
     vEd->setNum( val );
 
     rEd->setNum( qRed(currentColor()) );
     gEd->setNum( qGreen(currentColor()) );
     bEd->setNum( qBlue(currentColor()) );
 
 
     showCurrentColor();
 }
 
 class QColorDialogPrivate : public QObject
 {
 Q_OBJECT
 public:
     QColorDialogPrivate( QColorDialog *p );
     QRgb currentColor() const { return cs->currentColor(); }
     void setCurrentColor( QRgb rgb );
 
     int currentAlpha() const { return cs->currentAlpha(); }
     void setCurrentAlpha( int a ) { cs->setCurrentAlpha( a ); }
     void showAlpha( bool b ) { cs->showAlpha( b ); }
 
 private slots:
     void addCustom();
 
     void newHsv( int h, int s, int v );
     void newColorTypedIn( QRgb rgb );
     void newCustom( int, int );
     void newStandard( int, int );
 private:
     QColorPicker *cp;
     QColorLuminancePicker *lp;
     QWellArray *custom;
     QWellArray *standard;
     QColorShower *cs;
     int nextCust;
     bool compact;
 };
 
 //sets all widgets to display h,s,v
 void QColorDialogPrivate::newHsv( int h, int s, int v )
 {
     cs->setHsv( h, s, v );
     cp->setCol( h, s );
     lp->setCol( h, s, v );
 }
 
 //sets all widgets to display rgb
 void QColorDialogPrivate::setCurrentColor( QRgb rgb )
 {
     cs->setRgb( rgb );
     newColorTypedIn( rgb );
 }
 
 //sets all widgets exept cs to display rgb
 void QColorDialogPrivate::newColorTypedIn( QRgb rgb )
 {
     int h, s, v;
     rgb2hsv(rgb, h, s, v );
     cp->setCol( h, s );
     lp->setCol( h, s, v);
 }
 
 void QColorDialogPrivate::newCustom( int r, int c )
 {
     int i = r+2*c;
     setCurrentColor( cusrgb[i] );
     nextCust = i;
     standard->setSelected(-1,-1);
 }
 
 void QColorDialogPrivate::newStandard( int r, int c )
 {
     setCurrentColor( stdrgb[r+c*6] );
     custom->setSelected(-1,-1);
 }
 
 QColorDialogPrivate::QColorDialogPrivate( QColorDialog *dialog ) :
     QObject(dialog)
 {
     compact = FALSE;
     // small displays (e.g. PDAs cannot fit the full color dialog,
     // so just use the color picker.
     if ( qApp->desktop()->width() < 480 || qApp->desktop()->height() < 350 )
 	compact = TRUE;
 
     nextCust = 0;
     const int lumSpace = 3;
     int border = 12;
     if ( compact )
 	border = 6;
     QHBoxLayout *topLay = new QHBoxLayout( dialog, border, 6 );
     QVBoxLayout *leftLay = 0;
 
     if ( !compact )
 	leftLay = new QVBoxLayout( topLay );
 
     initRGB();
 
     if ( !compact ) {
 	standard = new QColorWell( dialog, 6, 8, stdrgb );
 	standard->setCellSize( 28, 24 );
 	QLabel * lab = new QLabel( standard,
 				QColorDialog::tr( "&Basic colors"), dialog );
 	connect( standard, SIGNAL(selected(int,int)), SLOT(newStandard(int,int)));
 	leftLay->addWidget( lab );
 	leftLay->addWidget( standard );
 
 
 	leftLay->addStretch();
 
 	custom = new QColorWell( dialog, 2, 8, cusrgb );
 	custom->setCellSize( 28, 24 );
 	custom->setAcceptDrops( TRUE );
 
 	connect( custom, SIGNAL(selected(int,int)), SLOT(newCustom(int,int)));
 	lab = new QLabel( custom, QColorDialog::tr( "&Custom colors") , dialog );
 	leftLay->addWidget( lab );
 	leftLay->addWidget( custom );
 
 	QPushButton *custbut =
 	    new QPushButton( QColorDialog::tr("&Define Custom Colors >>"),
 						dialog );
 	custbut->setEnabled( FALSE );
 	leftLay->addWidget( custbut );
     } else {
 	// better color picker size for small displays
 	pWidth = 150;
 	pHeight = 100;
     }
 
     QVBoxLayout *rightLay = new QVBoxLayout( topLay );
 
     QHBoxLayout *pickLay = new QHBoxLayout( rightLay );
 
 
     QVBoxLayout *cLay = new QVBoxLayout( pickLay );
     cp = new QColorPicker( dialog );
     cp->setFrameStyle( QFrame::Panel + QFrame::Sunken );
     cLay->addSpacing( lumSpace );
     cLay->addWidget( cp );
     cLay->addSpacing( lumSpace );
 
     lp = new QColorLuminancePicker( dialog );
     lp->setFixedWidth( 20 ); //###
     pickLay->addWidget( lp );
 
     connect( cp, SIGNAL(newCol(int,int)), lp, SLOT(setCol(int,int)) );
     connect( lp, SIGNAL(newHsv(int,int,int)), this, SLOT(newHsv(int,int,int)) );
 
     rightLay->addStretch();
 
     cs = new QColorShower( dialog );
     connect( cs, SIGNAL(newCol(QRgb)), this, SLOT(newColorTypedIn(QRgb)));
     rightLay->addWidget( cs );
 
     QHBoxLayout *buttons;
     if ( compact )
 	buttons = new QHBoxLayout( rightLay );
     else
 	buttons = new QHBoxLayout( leftLay );
 
     QPushButton *ok, *cancel;
     ok = new QPushButton( QColorDialog::tr("OK"), dialog );
     connect( ok, SIGNAL(clicked()), dialog, SLOT(accept()) );
     ok->setDefault(TRUE);
     cancel = new QPushButton( QColorDialog::tr("Cancel"), dialog );
     connect( cancel, SIGNAL(clicked()), dialog, SLOT(reject()) );
     buttons->addWidget( ok );
     buttons->addWidget( cancel );
     buttons->addStretch();
 
     if ( !compact ) {
 	QPushButton *addCusBt = new QPushButton(
 					QColorDialog::tr("&Add To Custom Colors"),
 						 dialog );
 	rightLay->addWidget( addCusBt );
 	connect( addCusBt, SIGNAL(clicked()), this, SLOT(addCustom()) );
     }
 }
 
 void QColorDialogPrivate::addCustom()
 {
     cusrgb[nextCust] = cs->currentColor();
     custom->repaint( FALSE ); //###
     nextCust = (nextCust+1) % 16;
 }
 
 
 // BEING REVISED: jo
 /*!
   \class QColorDialog qcolordialog.h
   \brief The QColorDialog class provides a dialog widget for specifying colors.
   \ingroup dialogs
 
   The color dialog's function is to allow users to choose colors -
   for instance, you might use this in a drawing program to allow the
   user to set the brush color.
 
   This version of Qt only provides modal color dialogs. The static
   getColor() function shows the dialog and allows the user to specify a color,
   while getRgba() does the same but allows the user to specify a color with an
   alpha channel (transparency) value.
 
   The user can store customCount() different custom colors. The custom
   colors are shared by all color dialogs, and remembered during the
   execution of the program. Use setCustomColor() to set the
   custom colors, and customColor() to get them.