private void GrabHue(Point mouseXY)
{
// center our coordinate system so the middle is (0,0), and positive Y is facing up
float cx = mouseXY.X - radius;
float cy = radius - mouseXY.Y;
double theta = Math.Atan2(cy, cx);
if (theta < 0)
{
theta += 2 * Math.PI;
}
hsvcolor.Hue = (int)(theta * radtodeg);
color = hsvcolor.ToColorBgra();
OnColorChanged();
}
void hsvupdown_ValueChanged(object sender, EventArgs e)
{
if (!eventssuspended)
{
SuspendEvents();
hslider.Value = (float)hupdown.Value / 360f;
sslider.Value = (float)supdown.Value / 100f;
vslider.Value = (float)vupdown.Value / 100f;
HsvColor h = new HsvColor((int)hupdown.Value, (int)supdown.Value, (int)vupdown.Value);
ColorBgra c = h.ToColorBgra();
c.A = (byte)aupdown.Value;
wheel.Color = c;
SetRgbSliders(c);
SetHex(c.R, c.G, c.B);
ResumeEvents();
}
}