protected virtual void SetColour(Point point)
{
double dx;
double dy;
double angle;
double distance;
double saturation;
Padding padding;
HSLColour newColour;
padding = this.Padding;
dx = Math.Abs(point.X - _centerPoint.X - padding.Left);
dy = Math.Abs(point.Y - _centerPoint.Y - padding.Top);
angle = Math.Atan(dy / dx) / Math.PI * 180;
distance = Math.Pow(Math.Pow(dx, 2) + Math.Pow(dy, 2), 0.5);
saturation = distance / _radius;
if (point.X < _centerPoint.X)
{
angle = 180 - angle;
}
if (point.Y > _centerPoint.Y)
{
angle = 360 - angle;
}
newColour = new HSLColour(angle, saturation, 0.5);
if (_hslColour != newColour)
{
_lockUpdates = true;
this.HSLColour = newColour;
this.Colour = _hslColour.ToRgbColour();
_lockUpdates = false;
}
}
protected void PaintColour(PaintEventArgs e, HSLColour colour)
{
this.PaintColour(e, colour, false);
}