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kdelibs'KColorCombo (./kdelibs/kdeui/kcolordlg.h:380)

class KColorCombo : public QComboBox
{
	Q_OBJECT
public:
	KColorCombo( QWidget *parent, const char *name = 0L );

	void setColor( const QColor &col );

public slots:
	void slotActivated( int index );
	void slotHighlighted( int index );

signals:
	void activated( const QColor &col );
	void highlighted( const QColor &col );

protected:
	virtual void resizeEvent( QResizeEvent *re );

private:
	void addColors();
	QColor customColor;
	QColor color;

    class KColorComboPrivate;
    KColorComboPrivate *d;
};

kdelibs'KColorCombo::KColorCombo() (./kdelibs/kdeui/kcolordlg.cpp:1218)

KColorCombo::KColorCombo( QWidget *parent, const char *name )
	: QComboBox( parent, name )
{
	customColor.setRgb( 255, 255, 255 );
	color.setRgb( 255, 255, 255 );

	createStandardPalette();

	addColors();

	connect( this, SIGNAL( activated(int) ), SLOT( slotActivated(int) ) );
	connect( this, SIGNAL( highlighted(int) ), SLOT( slotHighlighted(int) ) );
}

kdelibs'KColorCombo::setColor() (./kdelibs/kdeui/kcolordlg.cpp:1232)

void KColorCombo::setColor( const QColor &col )
{
	color = col;

	addColors();
}

kdelibs'KColorCombo::resizeEvent() (./kdelibs/kdeui/kcolordlg.cpp:1239)

void KColorCombo::resizeEvent( QResizeEvent *re )
{
	QComboBox::resizeEvent( re );

	addColors();
}

kdelibs'KColorCombo::slotActivated() (./kdelibs/kdeui/kcolordlg.cpp:1246)

void KColorCombo::slotActivated( int index )
{
	if ( index == 0 )
	{
	    if ( KColorDialog::getColor( customColor ) == QDialog::Accepted )
		{
			QRect rect( 0, 0, width(), 20 );
			QPixmap pixmap( rect.width(), rect.height() );
			QPainter painter;
			QPen pen;

			if ( qGray( customColor.rgb() ) < 128 )
				pen.setColor( white );
			else
				pen.setColor( black );

			painter.begin( &pixmap );
			QBrush brush( customColor );
			painter.fillRect( rect, brush );
			painter.setPen( pen );
			painter.drawText( 2, 18,
					  i18n("Custom...") );
			painter.end();

			changeItem( pixmap, 0 );
			pixmap.detach();
		}

		color = customColor;
	}
	else
		color = standardPalette[ index - 1 ];

	emit activated( color );
}

kdelibs'KColorCombo::slotHighlighted() (./kdelibs/kdeui/kcolordlg.cpp:1282)

void KColorCombo::slotHighlighted( int index )
{
	if ( index == 0 )
		color = customColor;
	else
		color = standardPalette[ index - 1 ];

	emit highlighted( color );
}

kdelibs'KColorCombo::addColors() (./kdelibs/kdeui/kcolordlg.cpp:1292)

void KColorCombo::addColors()
{
	QRect rect( 0, 0, width(), 20 );
	QPixmap pixmap( rect.width(), rect.height() );
	QPainter painter;
	QPen pen;
	int i;

	clear();

	createStandardPalette();

	for ( i = 0; i < STANDARD_PAL_SIZE; i++ )
		if ( standardPalette[i] == color ) break;

	if ( i == STANDARD_PAL_SIZE )
		customColor = color;

	if ( qGray( customColor.rgb() ) < 128 )
		pen.setColor( white );
	else
		pen.setColor( black );

	painter.begin( &pixmap );
	QBrush brush( customColor );
	painter.fillRect( rect, brush );
	painter.setPen( pen );
	painter.drawText( 2, 18, i18n("Custom...") );
	painter.end();

	insertItem( pixmap );
	pixmap.detach();
	
	for ( i = 0; i < STANDARD_PAL_SIZE; i++ )
	{
		painter.begin( &pixmap );
		QBrush brush( standardPalette[i] );
		painter.fillRect( rect, brush );
		painter.end();

		insertItem( pixmap );
		pixmap.detach();

		if ( standardPalette[i] == color )
			setCurrentItem( i + 1 );
	}
}