/// <summary> Override <see cref="PaletteBase.GetSliderBrush"/>. </summary>
public override GradientStopCollection GetSliderBrush(HSV HSV)
{
byte A = HSV.A;
float H = HSV.H;
float S = HSV.S;
float L = HSV.V;
return(new GradientStopCollection()
{
new GradientStop()
{
Offset = 0,
Color = HSV.HSVtoRGB(A, H, 0.0f, L)
},
new GradientStop()
{
Offset = 1,
Color = HSV.HSVtoRGB(A, H, 100.0f, L)
},
});
}
/// <summary> Override <see cref="PalettePicker.GetSliderBrush"/>. </summary>
public override GradientStopCollection GetSliderBrush(HSV hsv)
{
byte A = HSV.A;
float H = HSV.H;
float S = HSV.S;
float V = HSV.V;
return(new GradientStopCollection()
{
new GradientStop()
{
Offset = 0.0f,
Color = HSV.HSVtoRGB(A, H, S, 0)
},
new GradientStop()
{
Offset = 1.0f,
Color = HSV.HSVtoRGB(A, H, S, 100)
},
});
}
/// <summary> Override <see cref="PaletteBase.Draw"/>. </summary>
public override void Draw(CanvasControl sender, CanvasDrawingSession ds, HSV hsv, Vector2 Center, float squareHalfWidth, float squareHalfHeight)
{
//Palette
Rect rect = new Rect(Center.X - squareHalfWidth, Center.Y - squareHalfHeight, squareHalfWidth * 2, squareHalfHeight * 2);
ds.FillRoundedRectangle(rect, 4, 4, new CanvasLinearGradientBrush(sender, Windows.UI.Colors.White, HSV.HSVtoRGB(hsv.H))
{
StartPoint = new Vector2(Center.X - squareHalfWidth, Center.Y), EndPoint = new Vector2(Center.X + squareHalfWidth, Center.Y)
});
ds.FillRoundedRectangle(rect, 4, 4, new CanvasLinearGradientBrush(sender, Windows.UI.Colors.Transparent, Windows.UI.Colors.Black)
{
StartPoint = new Vector2(Center.X, Center.Y - squareHalfHeight), EndPoint = new Vector2(Center.X, Center.Y + squareHalfHeight)
});
ds.DrawRoundedRectangle(rect, 4, 4, Windows.UI.Colors.Gray);
//Thumb
float px = ((float)hsv.S - 50) * squareHalfWidth / 50 + Center.X;
float py = (50 - (float)hsv.V) * squareHalfHeight / 50 + Center.Y;
ds.DrawCircle(px, py, 9, Windows.UI.Colors.Black, 5);
ds.DrawCircle(px, py, 9, Windows.UI.Colors.White, 3);
}
/// <summary>
/// Palette color from colors
/// </summary>
/// <param name="colors"> Color array. </param>
/// <returns> Color </returns>
public static Color GetPaletteFromColors(Color[] colors)
{
try
{
//saturation
double sumS = 0;
//value
double sumV = 0;
double sumHue = 0;
double maxV = 0;
double maxS = 0;
double maxH = 0;
double count = 0;
foreach (var color in colors)
{
HSV hsv = HSV.RGBtoHSV(color);
if (hsv.H == 0)continue;
maxS = hsv.S > maxS ? hsv.S : maxS;
maxV = hsv.V > maxV ? hsv.V : maxV;
maxH = hsv.H > maxH ? hsv.H : maxH;
sumHue += hsv.H;
sumS += hsv.S;
sumV += hsv.V;
count++;
}
double avgH = sumHue / count;
double avgV = sumV / count;
double avgS = sumS / count;
double maxAvgV = maxV / 2;
double maxAvgS = maxS / 2;
double maxAvgH = maxH / 2;
double h = Math.Max(maxAvgV, avgV);
double s = Math.Min(maxAvgS, avgS);
double hue = Math.Min(maxAvgH, avgH);
double R = 0;
double G = 0;
double B = 0;
count = 0;
foreach (var color in colors)
{
HSV hsv = HSV.RGBtoHSV(color);
if (hsv.H == 0) continue;
if (hsv.H >= hue + 10 && hsv.V >= h && hsv.S >= s)
{
R += color.R;
G += color.G;
B += color.B;
count++;
}
}
double r = R / count;
double g = G / count;
double b = B / count;
// if (r + g + b > 96 && r + g + b < 672)
return Color.FromArgb(255, (byte)r, (byte)g, (byte)b);
}
catch (Exception)
{
return FallBackColor;
}
}
/// <summary> Override <see cref="PaletteBase.GetValue"/>. </summary> public override float GetValue(HSV hsv) => hsv.S;
/// <summary> Override <see cref="PaletteBase.GetHSL"/>. </summary> public override HSV GetHSL(HSV hsv, float value) => new HSV(hsv.A, hsv.H, value, hsv.V);
/// <summary> Override <see cref="PalettePicker.GetHSV"/>. </summary> public override HSV GetHSV(HSV hsv, float value) => new HSV(hsv.A, hsv.H, hsv.S, value);
/// <summary> /// Get the slider background brush value from HSV /// </summary> /// <param name="hsv"> HSV </param> /// <returns> GradientStopCollection </returns> public abstract GradientStopCollection GetSliderBrush(HSV hsv);
/// <summary> /// Get the corresponding value from HSV /// </summary> /// <param name="hsv"></param> /// <returns> Value </returns> public abstract float GetValue(HSV hsv);
/// <summary> /// Change the current value to get the HSV /// </summary> /// <param name="hsv"> HSV</param> /// <param name="value"> The source value. </param> /// <returns> HSV </returns> public abstract HSV GetHSV(HSV hsv, float value);
/// <summary> /// Occurs when dragging on a palette. /// </summary> /// <param name="hsv"> HSV </param> /// <param name="position"> Position </param> /// <param name="squareHalfWidth"> Palette square half width. </param> /// <param name="squareHalfHeight"> Palette square half height. </param> /// <returns> HSV </returns> public abstract HSV Delta(HSV hsv, Vector2 position, float squareHalfWidth, float squareHalfHeight);
/// <summary> /// Draw /// </summary> /// <param name="sender"> CanvasControl </param> /// <param name="ds"> DrawingSession </param> /// <param name="hsv"> HSV </param> /// <param name="center"> Center </param> /// <param name="squareHalfWidth"> Palette square half width. </param> /// <param name="squareHalfHeight"> Palette square half height. </param> /// <param name="stroke"> The stroke brush. </param> public abstract void Draw(CanvasControl sender, CanvasDrawingSession ds, HSV hsv, Vector2 center, float squareHalfWidth, float squareHalfHeight, SolidColorBrush stroke);
/// <summary> Override <see cref="PaletteBase.GetValue"/>. </summary> public override float GetValue(HSV HSV) => HSV.H;
