本文整理汇总了C++中QColor::toHsv方法的典型用法代码示例。如果您正苦于以下问题：C++ QColor::toHsv方法的具体用法？C++ QColor::toHsv怎么用？C++ QColor::toHsv使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QColor的用法示例。
在下文中一共展示了QColor::toHsv方法的12个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: perlin
void Quiddiards::perlin(QImage& image, QColor rgb, float factor){
QColor hsv(rgb.toHsv());
qreal value = hsv.valueF();
const int rows = 64, cols = 64, octave = 7;
float wNoise[rows][cols], pNoise[rows*octave][cols*octave];
for (int i = 0; i < rows; i++){
for (int j = 0; j < cols; j++){
wNoise[i][j] = randf(factor, 1);
}
}
image = QImage(rows*octave, cols*octave, QImage::Format_RGB32);
image.fill(hsv);
float tTable[octave];
for (int i = 0; i < octave; i++){
float t = i / float(octave);
tTable[i] = t*t*t*(t*(6 * t - 15) + 10);
}
for (int i = 0; i < rows*octave; i++){
int y0 = i / octave, y1 = (y0 + 1) % rows;
for (int j = 0; j < cols*octave; j++){
int x0 = j / octave, x1 = (x0 + 1) % cols;
hsv.setHsvF(hsv.hueF(), hsv.saturationF(), value*quadricInter(wNoise[x0][y0], wNoise[x1][y0], wNoise[x0][y1], wNoise[x1][y1], tTable[j%octave], tTable[i%octave]));
QRgb rgb = hsv.rgb();
image.setPixel(j, i, hsv.rgb());
}
}
}示例2: getSaturation
float Theme::getSaturation(QString color) {
QColor c;
c.setNamedColor(color);
QColor converted = c.toHsv();
return converted.hsvSaturationF();
}示例3: getLightness
float Theme::getLightness(QString color) {
QColor c;
c.setNamedColor(color);
QColor converted = c.toHsv();
return converted.valueF();
}示例4: getHue
float Theme::getHue(QString color) {
QColor c;
c.setNamedColor(color);
QColor converted = c.toHsv();
return converted.hsvHueF();
}示例5: make_color_readable
// Make a color darker if it's too bright
QColor make_color_readable(QColor clr)
{
// Gray
if (clr.red() == clr.green() && clr.green() == clr.blue()) {
return QColor("black");
}
clr = clr.toHsv();
int value = MIN(clr.value(), 150);
int saturation = 255;
clr.setHsv(clr.hue(), saturation, value, 255);
return clr.toRgb();
}示例6: randomGradientBrush
QBrush Test::randomGradientBrush()
{
QLinearGradient *gradient = new QLinearGradient();
gradient->setCoordinateMode(QGradient::ObjectBoundingMode);
int h, s, v;
h = qrand() % 360;
s = qrand() % 255;
v = qrand() % 255;
QColor colorBottom = QColor::fromHsv(h, s, v);
colorBottom.toHsv().getHsv(&h, &s, &v);
int diff = 50;
if(v + diff <= 255) {
v += diff;
}
else {
v -= diff;
}
diff = 75;
if(s + diff <= 255) {
s += diff;
}
else {
s -= diff;
}
QColor colorTop = QColor::fromHsv(h, s, v);
gradient->setColorAt(0, colorTop);
gradient->setColorAt(1, colorBottom);
gradient->setStart(0, 0);
gradient->setFinalStop(0, 1);
QBrush retval(*gradient);
delete gradient;
return retval;
}示例7: setColor
void ColorWheel::setColor(QColor color)
{
// this is a UI updating function, never emit any signals
// and don't call any functions that will emit signals
color = color.toHsv();
if (color == mCurrentColor)
{
return;
}
if (color.hue() == -1) // grayscale color, keep the current hue
{
color.setHsv(mCurrentColor.hue(), color.saturation(), color.value(), color.alpha());
}
mCurrentColor = color;
drawSquareImage(color.hue());
update();
}示例8: updateChart
//----------------------------------------------------------------------------
// Update Chart
//----------------------------------------------------------------------------
void ReportPieChart::updateChart()
{
mModel->setRowCount( mDataList.size() );
if( mDataList.size() > 0 )
{
// Sort data items
switch( mSortType )
{
case SORT_BY_BALANCE_DESCENDING:
qSort( mDataList.begin(), mDataList.end(), pieDataSortByBalanceDescending );
break;
case SORT_BY_NAME_ASCENDING:
qSort( mDataList.begin(), mDataList.end(), pieDataSortByNameAscending );
break;
}
const int colorRange = COLOR_RANGE;
int step = qMin( MAX_COLOR_STEP, (colorRange / mDataList.size()) );
QColor baseColor = BASE_COLOR.toHsv();
int h = baseColor.hue();
int s = baseColor.saturation();
int v = baseColor.value();
for (int i = 0; i < mDataList.size(); ++i)
{
QColor secondaryLabelColor = ( mDataList[i].mValue > 0 ) ? QColor(Qt::darkGreen) : QColor(Qt::red);
QColor nextColor;
int newH = (h + step*i)%colorRange;
nextColor.setHsv( newH, s, v );
QString valueStr = Transaction::getAmountText( mDataList[i].mValue );
mModel->setData( mModel->index(i,(int)PieView::COLUMN_LABEL), mDataList[i].mName );
mModel->setData( mModel->index(i,(int)PieView::COLUMN_LABEL), nextColor, Qt::DecorationRole );
mModel->setData( mModel->index(i,(int)PieView::COLUMN_VALUE), qAbs(mDataList[i].mValue) );
mModel->setData( mModel->index(i,(int)PieView::COLUMN_SEC_LABEL), valueStr );
mModel->setData( mModel->index(i,(int)PieView::COLUMN_SEC_LABEL), secondaryLabelColor, Qt::DecorationRole );
}
}
updateViewport();
} // ReportPieChart::updateChart示例9: toHsvNonDestructive
void tst_QColor::toHsvNonDestructive()
{
QColor aColor = QColor::fromHsvF(0.11, 0.22, 0.33, 0.44);
QCOMPARE(aColor, aColor.toHsv());
}示例10: drawGradient
QImage GradientLoader::drawGradient(const GradientList& data)
{
if (data.isEmpty())
{
return QImage();
}
QPixmap pix(MAX_THUMB_SIZE, MAX_THUMB_SIZE / 2);
pix.fill(Qt::white);
QPainter p(&pix);
p.setPen(QPen(Qt::transparent));
p.setRenderHint(QPainter::Antialiasing, true);
QLinearGradient grad(0.0, 0.0, 1.0, 0.0);
grad.setCoordinateMode(QGradient::StretchToDeviceMode);
foreach(const GradientData & gradient, data)
{
if (gradient.status != GradientData::Ok)
{
continue;
}
qreal start = gradient.startPoint + 0.01;
qreal end = gradient.endPoint;
// do some basic range checks
start = qMin(1.0, start);
start = qMax(0.0, start);
end = qMin(1.0, end);
end = qMax(0.0, end);
// check coloring mode
if (gradient.coloringMode == GradientData::HSVclockwise ||
gradient.coloringMode == GradientData::HSVcounterClockwise
)
{
const int hue_range = 360;
bool reverse = (gradient.coloringMode == GradientData::HSVcounterClockwise);
qreal stepping = qAbs(end - start) / (qreal)hue_range;
qreal pos = reverse ? start : end;
QColor col = QColor::fromRgbF(gradient.leftColorRed,
gradient.leftColorGreen,
gradient.leftColorBlue,
gradient.leftColorAlpha);
QColor hsv = col.toHsv();
qreal saturationF = hsv.saturationF();
qreal valueF = hsv.valueF();
qreal alphaF = hsv.alphaF();
for (int h = 0.0; h < hue_range; ++h)
{
grad.setColorAt(pos, QColor::fromHsvF((qreal)h / hue_range,
saturationF,
valueF,
alphaF));
if (reverse)
{
pos += stepping;
}
else
{
pos -= stepping;
}
}
}
else
{
grad.setColorAt(start, QColor::fromRgbF(gradient.leftColorRed,
gradient.leftColorGreen,
gradient.leftColorBlue,
gradient.leftColorAlpha));
grad.setColorAt(end, QColor::fromRgbF(gradient.rightColorRed,
gradient.rightColorGreen,
gradient.rightColorBlue,
gradient.rightColorAlpha));
}
}
p.fillRect(pix.rect(), QBrush(grad));
p.end();
return pix.toImage();
}示例11: invertColor
static inline QColor invertColor(const QColor color)
{
QColor c = color.toHsv();
c.setHsv(c.hue(), c.saturation(), 255 - c.value());
return c;
}示例12: setColor
void ColorInspector::setColor(QColor newColor)
{
// this is a UI update function, never emit any signals
// grab the color from color manager, and then update itself, that's it.
// compare under the same color spec
newColor = (isRgbColors) ? newColor.toRgb() : newColor.toHsv();
if (newColor == mCurrentColor)
{
return;
}
if(isRgbColors)
{
QSignalBlocker b1(ui->red_slider);
QSignalBlocker b2(ui->green_slider);
QSignalBlocker b3(ui->blue_slider);
QSignalBlocker b4(ui->alpha_slider);
ui->red_slider->setRgb(newColor);
ui->green_slider->setRgb(newColor);
ui->blue_slider->setRgb(newColor);
ui->alpha_slider->setRgb(newColor);
QSignalBlocker b5(ui->RedspinBox);
QSignalBlocker b6(ui->GreenspinBox);
QSignalBlocker b7(ui->BluespinBox);
QSignalBlocker b8(ui->AlphaspinBox);
ui->RedspinBox->setValue(newColor.red());
ui->GreenspinBox->setValue(newColor.green());
ui->BluespinBox->setValue(newColor.blue());
ui->AlphaspinBox->setValue(newColor.alpha());
}
else
{
QSignalBlocker b1(ui->red_slider);
QSignalBlocker b2(ui->green_slider);
QSignalBlocker b3(ui->blue_slider);
QSignalBlocker b4(ui->alpha_slider);
ui->red_slider->setHsv(newColor);
ui->green_slider->setHsv(newColor);
ui->blue_slider->setHsv(newColor);
ui->alpha_slider->setHsv(newColor);
QSignalBlocker b5(ui->RedspinBox);
QSignalBlocker b6(ui->GreenspinBox);
QSignalBlocker b7(ui->BluespinBox);
QSignalBlocker b8(ui->AlphaspinBox);
ui->RedspinBox->setValue(newColor.hsvHue());
ui->GreenspinBox->setValue(qRound(newColor.hsvSaturation() / 2.55));
ui->BluespinBox->setValue(qRound(newColor.value() / 2.55));
ui->AlphaspinBox->setValue(qRound(newColor.alpha() / 2.55));
}
mCurrentColor = newColor;
QPalette p1 = ui->colorWrapper->palette(), p2 = ui->color->palette();
p1.setBrush(QPalette::Background, QBrush(QImage(":/background/checkerboard.png")));
p2.setColor(QPalette::Background, mCurrentColor);
ui->colorWrapper->setPalette(p1);
ui->color->setPalette(p2);
update();
}