void HSVRangeDisplay::updateImage()
{
m_width = width();
m_height = height();
//printf("HSVRangeDisplay::updateImage(): %d x %d\n", m_width, m_height);
m_image = QImage(m_width, m_height, QImage::Format_RGB16);
if (!m_width || !m_height) return;
for (int y = 0; y < m_height; y++) {
uint16 hue = y2hue(y);
uint16 *dest = (uint16*) m_image.scanLine(y);
for (int x = 0; x < m_width/2; x++) {
*dest++ = HSV(hue, x2sat(x), 255).toPixel<Pixel565>().rgb;
}
for (int x = m_width/2; x < m_width; x++) {
*dest++ = HSV(hue, 255, x2val(x)).toPixel<Pixel565>().rgb;
}
}
}
void ColorPicker::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 (!m_pix || m_pix->height() != hi || m_pix->width() != wi)
{
delete m_pix;
QImage img(wi, hi, QImage::Format_RGB32);
int y;
uint *pixel = (uint *) img.scanLine(0);
for (y = 0; y < hi; y++)
{
const uint *end = pixel + wi;
int yh = y2hue(y+coff);
int ys = y2sat(y+coff);
int yg = y2gam(y+coff);
while (pixel < end)
{
QColor c;
c.setHsv(yh, ys, (int)(255*pow(0.7,yg/100.0)));
*pixel = c.rgb();
++pixel;
}
}
m_pix = new QPixmap(QPixmap::fromImage(img));
}
QPainter p(this);
p.drawPixmap(1, coff, *m_pix);
const QPalette &g = palette();
qDrawShadePanel(&p, r, g, true);
p.setPen(g.foreground().color());
p.setBrush(g.foreground());
QPolygon a;
int y = m_mode==Hue ? hue2y(m_hue) :
m_mode==Saturation ? sat2y(m_sat) :
gam2y(m_gam);
a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
p.eraseRect(w, 0, 5, height());
p.drawPolygon(a);
}
void ColorPicker::mousePressEvent(QMouseEvent *m)
{
if (m_mode==Hue) setHue(y2hue(m->y()));
else if (m_mode==Saturation) setSat(y2sat(m->y()));
else setGam(y2gam(m->y()));
}
