Create Gradient Brush - CSharp System.Windows.Media

CSharp examples for System.Windows.Media:Brush

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Description

Create Gradient Brush

Demo Code


using System.Windows;
using System.Reflection;
using System.Windows.Media;
using System.Text;
using System.Linq;
using System.Collections.Generic;
using System;//  ww  w. ja  v a2  s  .  c  om

public class Main{
        public static LinearGradientBrush GradientBrush(Color color, double luminance = 0.94, double saturation = 1.2)
        {

            int[] numbers = {color.R, color.G, color.B};
            double n1 = numbers.Max();
            double n2 = numbers.Min();
            double n3 = n1 / (n1 - n2);
            double r = (color.R - n1) * saturation + n1;
            double g = (color.G - n1) * saturation + n1;
            double b = (color.B - n1) * saturation + n1;
            r = Math.Max(r, 0);
            g = Math.Max(g, 0);
            b = Math.Max(b, 0);


            double l1 = 0.298912 * color.R + 0.586611 * color.G + 0.114478 * color.B;
            double l2 = 0.298912 * r + 0.586611 * g + 0.114478 * b;
            double f = (l2 / l1) * luminance;
            r *= f;
            g *= f;
            b *= f;
            r = Math.Min(r, 255);
            g = Math.Min(g, 255);
            b = Math.Min(b, 255);

            Color color2 = Color.FromRgb((byte)r, (byte)g, (byte)b);
            
            LinearGradientBrush brush = new LinearGradientBrush();
            brush.StartPoint = new Point(0, 0.5);
            brush.EndPoint = new Point(0, 1);
            brush.GradientStops.Add(new GradientStop(color, 0.0));
            brush.GradientStops.Add(new GradientStop(color2, 1.0));
            brush.Freeze();

            return brush;
        }
}

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