private void OnColorSliderValueChanged(object sender, EventArgs e)
{
if (this.IgnoreChangedEvents)
{
return;
}
this.PushIgnoreChangedEvents();
if (sender == redColorSlider ||
sender == greenColorSlider ||
sender == blueColorSlider)
{
ColorBgra color = ColorBgra.FromBgra(
blueColorSlider.Value.ClampToByte(),
greenColorSlider.Value.ClampToByte(),
redColorSlider.Value.ClampToByte(),
alphaColorSlider.Value.ClampToByte());
this.SetColorGradientMinMaxColorsRgb(color.R, color.G, color.B);
this.SetColorGradientMinMaxColorsAlpha(color.A);
this.SetColorGradientValuesRgb(color.R, color.G, color.B);
this.SetColorGradientMinMaxColorsAlpha(color.A);
this.SyncHsvFromRgb(color);
//OnUserColorChanged(rgbColor);
}
else if (
sender == hueColorSlider ||
sender == saturationColorSlider ||
sender == valueColorSlider)
{
ColorHsv oldHsv = colorWheel1.Color;
var hsv = new ColorHsv(
hueColorSlider.Value,
saturationColorSlider.Value,
valueColorSlider.Value);
if (oldHsv != hsv)
{
colorWheel1.Color = hsv;
this.SetColorGradientValuesHsv(
hsv.Hue,
hsv.Saturation,
hsv.Value);
this.SetColorGradientMinMaxColorsHsv(
hsv.Hue,
hsv.Saturation,
hsv.Value);
this.SyncRgbFromHsv(hsv);
//ColorRGB rgbColor = hsv.ToRgb();
//OnUserColorChanged(ColorBgra.FromBgra((byte)rgbColor.Blue, (byte)rgbColor.Green, (byte)rgbColor.Red, (byte)alphaUpDown.Value));
}
}
this.PopIgnoreChangedEvents();
}
public static ColorRgb FromHsv(ColorHsv hsv)
{
return hsv.ToRgb();
}
private void SyncRgbFromHsv(ColorHsv hsv)
{
ColorRgb rgb = hsv.ToRgb();
redColorSlider.Value = rgb.R;
greenColorSlider.Value = rgb.G;
blueColorSlider.Value = rgb.B;
this.SetColorGradientValuesRgb(rgb.R, rgb.G, rgb.B);
this.SetColorGradientMinMaxColorsRgb(rgb.R, rgb.G, rgb.B);
SetColorGradientMinMaxColorsAlpha(alphaColorSlider.Value);
}
private void SetColorGradientMinMaxColorsHsv(int h, int s, int v)
{
var hueColors = new Color[361];
for (int newH = 0; newH <= 360; ++newH)
{
var hsv = new ColorHsv(newH, 100, 100);
hueColors[newH] = hsv.ToColor();
}
this.hueColorSlider.CustomGradient = hueColors;
var satColors = new Color[101];
for (int newS = 0; newS <= 100; ++newS)
{
var hsv = new ColorHsv(h, newS, v);
satColors[newS] = hsv.ToColor();
}
this.saturationColorSlider.CustomGradient = satColors;
this.valueColorSlider.MaxColor = new ColorHsv(h, s, 100).ToColor();
this.valueColorSlider.MinColor = new ColorHsv(h, s, 0).ToColor();
}
public ColorWheel()
{
this.InitializeComponent();
this._Color = new ColorHsv(0, 0, 0);
}
private void GrabColor(Point point)
{
// center our coordinate system so the middle is (0,0), and positive Y is facing up
int cx = point.X - (Width / 2);
int cy = point.Y - (Height / 2);
double theta = Math.Atan2(cy, cx);
if (theta < 0)
{
theta += 2 * Math.PI;
}
double alpha = Math.Sqrt((cx * cx) + (cy * cy));
var h = (int)((theta / (Math.PI * 2)) * 360.0);
// ReSharper disable PossibleLossOfFraction
var s = (int)Math.Min(100.0, (alpha / (this.Width / 2)) * 100);
// ReSharper restore PossibleLossOfFraction
const int v = 100;
this._Color = new ColorHsv(h, s, v);
this.OnColorChanged();
this.Invalidate(true);
}
private Color[] GetColors()
{
var colors = new Color[ColorTesselation];
for (int i = 0; i < ColorTesselation; i++)
{
int hue = (i * 360) / ColorTesselation;
colors[i] = new ColorHsv(hue, 100, 100).ToColor();
}
return colors;
}
