// slider controls lightness
// x = hue 0 -> 360
// y = saturation 100 -> 0
protected override void DrawHSLLightness()
{
using (Graphics g = Graphics.FromImage(bmp))
{
HSL start = new HSL(0, 100, (int)selectedColor.hsl.Lightness100, selectedColor.argb.A);
HSL end = new HSL(0, 0, (int)selectedColor.hsl.Lightness100, selectedColor.argb.A);
for (int x = 0; x < clientWidth; x++)
{
start.Hue = end.Hue = (float)((double)x / (clientHeight));
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, 1, clientHeight), start, end, LinearGradientMode.Vertical))
{
g.FillRectangle(brush, new Rectangle(x, 0, 1, clientHeight));
}
}
}
}
// slider controls hue
// x = saturation 0 -> 100
// y = Lightness 100 -> 0
protected override void DrawHSLHue()
{
using (Graphics g = Graphics.FromImage(bmp))
{
HSL start = new HSL((int)selectedColor.hsl.Hue360, 0, 0, selectedColor.argb.A);
HSL end = new HSL((int)selectedColor.hsl.Hue360, 100, 0, selectedColor.argb.A);
for (int y = 0; y < clientHeight; y++)
{
start.Lightness = end.Lightness = (float)(1.0 - ((double)y / (clientHeight)));
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, clientWidth, 1), start, end, LinearGradientMode.Horizontal))
{
g.FillRectangle(brush, new Rectangle(0, y, clientWidth, 1));
}
}
}
}