/// <summary>
/// Add a color stop to the renderer.
/// </summary>
/// <param name="ratio">Position of the color in the renderer from 0 (start) to 1 (end).</param>
/// <param name="color">Color for the stop.</param>
public void AddColorStop(double ratio, Color color)
{
if (ratio > 1.0 || ratio < 0.0)
{
throw new Exception("Argument 'ratio' must be a value between 0 and 1.");
}
;
ColorStop stop = new ColorStop(ratio, color);
ColorStops.Add(stop);
}
public override System.Drawing.Brush CreateBrush()
{
if (ColorStops.Count == 0)
{
throw new ArgumentException();
}
var stops = ColorStops.OrderBy(t => t.Item1).ToArray();
var first = stops[0];
var last = stops[stops.Length - 1];
var brush = new System.Drawing.Drawing2D.LinearGradientBrush(Start, End, first.Item2.ToDrawingColor(),
last.Item2.ToDrawingColor());
return(brush);
}
public override Brush CreateBrush()
{
var path = new GraphicsPath();
path.AddEllipse(new RectangleF((float)(cx0 - r0), (float)(cy0 - r0), (float)(r0 * 2), (float)(r0 * 2)));
var brush = new PathGradientBrush(path);
var orderedStops = ColorStops.OrderBy(t => t.Item1).ToArray();
var colors = orderedStops.Select(i => i.Item2.ToDrawingColor()).ToArray();
var stops = orderedStops.Select(i => (float)(i.Item1)).ToArray();
brush.InterpolationColors = new ColorBlend(colors.Length)
{
Colors = colors,
Positions = stops
};
return(brush);
}
public void Serializing(StreamingContext context)
{
colorStopsInternal = ColorStops.ToArray();
}
/// <summary>
/// Remove all color stops from the renderer.
/// </summary>
public void ClearColorStops()
{
ColorStops.Clear();
}
