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kdelibs'KValueSelector (./kdelibs/kdeui/kcolordlg.h:79)

class KValueSelector : public KSelector
{
  Q_OBJECT
public:
  KValueSelector( QWidget *parent );

  void setHue( int h )	{	hue = h; }
  void setSaturation( int s )	{	sat = s; }

  void drawPalette();

protected:
  virtual void resizeEvent( QResizeEvent * );
  virtual void drawContents( QPainter *painter );

protected:
  int hue;
  int sat;
  QPixmap pixmap;

private:
  class KValueSelectorPrivate;
  KValueSelectorPrivate *d;
};

kdelibs'KValueSelector::KValueSelector() (./kdelibs/kdeui/kcolordlg.cpp:195)

KValueSelector::KValueSelector( QWidget *parent )
	: KSelector( KSelector::Vertical, parent ), hue(0), sat(0)
{
	setRange( 0, 255 );
	pixmap.setOptimization( QPixmap::BestOptim );
}

kdelibs'KValueSelector::resizeEvent() (./kdelibs/kdeui/kcolordlg.cpp:202)

void KValueSelector::resizeEvent( QResizeEvent * )
{
	drawPalette();
}

kdelibs'KValueSelector::drawContents() (./kdelibs/kdeui/kcolordlg.cpp:207)

void KValueSelector::drawContents( QPainter *painter )
{
	painter->drawPixmap( contentsRect().x(), contentsRect().y(), pixmap );
}

kdelibs'KValueSelector::drawPalette() (./kdelibs/kdeui/kcolordlg.cpp:212)

void KValueSelector::drawPalette()
{
	int xSize = contentsRect().width(), ySize = contentsRect().height();
	QImage image( xSize, ySize, 32 );
	QColor col;
	uint *p;
	QRgb rgb;

	for ( int v = 0; v < ySize; v++ )
	{
		p = (uint *) image.scanLine( ySize - v - 1 );
		col.setHsv( hue, sat, 255*v/(ySize-1) );
		rgb = col.rgb();
		for ( int i = 0; i < xSize; i++ )
			*p++ = rgb;
	}

	if ( QColor::numBitPlanes() <= 8 )
	{
		createStandardPalette();
		KImageEffect::dither( image, standardPalette, STANDARD_PAL_SIZE );
	}
	pixmap.convertFromImage( image );
}

//-----------------------------------------------------------------------------