void SetColor(PointF mousepoint)
{
if (WheelRectangle.Contains(mousepoint) == false)
return;
PointF center = Util.Center(ColorWheelRectangle);
double radius = Radius(ColorWheelRectangle);
double dx = Math.Abs(mousepoint.X - center.X);
double dy = Math.Abs(mousepoint.Y - center.Y);
double angle = Math.Atan(dy / dx) / Math.PI * 180;
double dist = Math.Pow((Math.Pow(dx, 2) + (Math.Pow(dy, 2))), 0.5);
double saturation = dist/radius;
//if (dist > radius + 5) // give 5 pixels slack
// return;
if (dist < 6)
saturation = 0; // snap to center
if (mousepoint.X < center.X)
angle = 180 - angle;
if (mousepoint.Y > center.Y)
angle = 360 - angle;
SelectedHSLColor = new HSLColor(angle, saturation, SelectedHSLColor.Lightness);
}
void OnWheelColorChanged(object sender, EventArgs e)
{
m_selectedColor.Hue = m_colorWheel.SelectedHSLColor.Hue;
m_selectedColor.Saturation = m_colorWheel.SelectedHSLColor.Saturation;
SelectedHSLColor = m_selectedColor;
}
protected override void SetPercent(float percent)
{
base.SetPercent(percent);
m_selectedColor.Lightness = percent / 100;
SelectedHSLColor = m_selectedColor;
}
void OnLightnessColorChanged(object sender, EventArgs e)
{
m_selectedColor.Lightness = m_colorBar.SelectedHSLColor.Lightness;
SelectedHSLColor = m_selectedColor;
}