void KoXYColorSelector::drawContents( QPainter *painter ) { KoColor c = m_colors[0]; // quick way to set the colorspace QColor color; const quint8 *colors[4]; colors[0] = m_colors[0].data(); colors[1] = m_colors[1].data(); colors[2] = m_colors[2].data(); colors[3] = m_colors[3].data(); QRect contentsRect_(contentsRect()); QImage image(contentsRect_.width(), contentsRect_.height(), QImage::Format_ARGB32 ); KoMixColorsOp * mixOp = m_colorSpace->mixColorsOp(); for (int x = 0; x < contentsRect_.width(); x++) for (int y = 0; y < contentsRect_.height(); y++){ qreal xVal = static_cast<qreal>(x) / (contentsRect_.width() - 1); qreal yVal = static_cast<qreal>(y) / (contentsRect_.height() - 1); qint16 colorWeights[4]; colorWeights[0] = static_cast<quint8>((1.0 - yVal) * (1.0 - xVal) * 255 + 0.5); colorWeights[1] = static_cast<quint8>((1.0 - yVal) * (xVal) * 255 + 0.5); colorWeights[2] = static_cast<quint8>((yVal) * (1.0 - xVal) * 255 + 0.5); colorWeights[3] = static_cast<quint8>((yVal) * (xVal) * 255 + 0.5); mixOp->mixColors(colors, colorWeights, 4, c.data()); c.toQColor( &color); image.setPixel(x, y, color.rgba()); } painter->drawImage( contentsRect_, image, QRect( 0, 0, image.width(), image.height()) ); }
void KoColorSlider::drawContents( QPainter *painter ) { QPixmap checker(8, 8); QPainter p(&checker); p.fillRect(0, 0, 4, 4, Qt::lightGray); p.fillRect(4, 0, 4, 4, Qt::darkGray); p.fillRect(0, 4, 4, 4, Qt::darkGray); p.fillRect(4, 4, 4, 4, Qt::lightGray); p.end(); QRect contentsRect_(contentsRect()); painter->fillRect(contentsRect_, QBrush(checker)); if( !d->upToDate || d->pixmap.isNull() || d->pixmap.width() != contentsRect_.width() || d->pixmap.height() != contentsRect_.height() ) { KoColor c = d->minColor; // smart way to fetch colorspace QColor color; const quint8 *colors[2]; colors[0] = d->minColor.data(); colors[1] = d->maxColor.data(); KoMixColorsOp * mixOp = c.colorSpace()->mixColorsOp(); QImage image(contentsRect_.width(), contentsRect_.height(), QImage::Format_ARGB32 ); if( orientation() == Qt::Horizontal ) { for (int x = 0; x < contentsRect_.width(); x++) { qreal t = static_cast<qreal>(x) / (contentsRect_.width() - 1); qint16 colorWeights[2]; colorWeights[0] = static_cast<quint8>((1.0 - t) * 255 + 0.5); colorWeights[1] = 255 - colorWeights[0]; mixOp->mixColors(colors, colorWeights, 2, c.data()); c.toQColor(&color); for (int y = 0; y < contentsRect_.height(); y++) image.setPixel(x, y, color.rgba()); } } else { for (int y = 0; y < contentsRect_.height(); y++) { qreal t = static_cast<qreal>(y) / (contentsRect_.height() - 1); qint16 colorWeights[2]; colorWeights[0] = static_cast<quint8>((t) * 255 + 0.5); colorWeights[1] = 255 - colorWeights[0]; mixOp->mixColors(colors, colorWeights, 2, c.data()); c.toQColor(&color); for (int x = 0; x < contentsRect_.width(); x++) image.setPixel(x, y, color.rgba()); } } d->pixmap = QPixmap::fromImage(image); d->upToDate = true; } painter->drawPixmap( contentsRect_, d->pixmap, QRect( 0, 0, d->pixmap.width(), d->pixmap.height()) ); }