public sd2.PathGradientBrush GetBrush(RectangleF rect)
{
var scale = 1f;
var bounds = rect;
if (Matrix != null)
{
bounds = Matrix.Inverse().TransformRectangle(bounds);
}
scale = GradientHelper.GetRadialScale(Center, Radius, GradientOrigin, bounds);
if (brush == null || lastScale != scale)
{
lastScale = scale;
var scaledRect = new RectangleF(GradientOrigin - (GradientOrigin - Center + Radius) * scale, GradientOrigin + (Center + Radius - GradientOrigin) * scale);
var path = new sd2.GraphicsPath();
path.AddEllipse(scaledRect.ToSD());
brush = new sd2.PathGradientBrush(path);
brush.CenterColor = StartColor.ToSD();
brush.CenterPoint = GradientOrigin.ToSD();
brush.WrapMode = wrapMode.ToSD();
brush.SurroundColors = new[] { EndColor.ToSD() };
if (Matrix != null)
{
brush.MultiplyTransform(Matrix.ToSD());
}
if (scale > 1f)
{
var paths = GradientHelper.GetGradientStops(StartColor.ToSD(), EndColor.ToSD(), scale, wrapMode);
brush.InterpolationColors = new sd2.ColorBlend
{
Positions = paths.Reverse().Select(r => 1f - r.Item1).ToArray(),
Colors = paths.Reverse().Select(r => r.Item2).ToArray()
};
}
}
return(brush);
}
public void SetGradientWrap (LinearGradientBrush widget, GradientWrapMode gradientWrap)
{
((BrushObject)widget.ControlObject).Brush.WrapMode = gradientWrap.ToSD ();
}
public sd2.LinearGradientBrush GetBrush(RectangleF rect)
{
var start = StartPoint;
var end = EndPoint;
if (wrapMode == GradientWrapMode.Pad)
{
// winforms does not support pad, so extend to fill entire drawing region
if (transform != null)
{
start = transform.TransformPoint(start);
end = transform.TransformPoint(end);
}
PointF min, max;
GradientHelper.GetLinearMinMax(start, end, rect, out min, out max, true);
var len = max.LengthTo(min);
// find start/end pos based on entire position
var startpos = min.LengthTo(start) / len;
var endpos = min.LengthTo(end) / len;
if (brush == null || lastStartPos != startpos || lastEndPos > endpos)
{
lastStartPos = startpos;
lastEndPos = endpos;
start = min;
end = max;
var diff = end - start;
// account for innacuracies in system.drawing when nearing horizontal or vertical
if (Math.Abs(diff.X) < 0.0001)
{
end.X = start.X;
}
if (Math.Abs(diff.Y) < 0.0001)
{
end.Y = start.Y;
}
brush = new sd2.LinearGradientBrush(start.ToSD(), end.ToSD(), StartColor, EndColor);
brush.WrapMode = sd2.WrapMode.Tile;
brush.InterpolationColors = new sd2.ColorBlend
{
Colors = new[]
{
StartColor,
StartColor,
EndColor,
EndColor
},
Positions = new[]
{
0f,
startpos,
endpos,
1f,
}
};
}
}
else if (brush == null)
{
brush = new sd2.LinearGradientBrush(StartPoint.ToSD(), EndPoint.ToSD(), StartColor, EndColor);
brush.WrapMode = wrapMode.ToSD();
if (transform != null)
{
brush.MultiplyTransform(transform.ToSD());
}
}
return(brush);
}
public void SetGradientWrap(LinearGradientBrush widget, GradientWrapMode gradientWrap)
{
((BrushObject)widget.ControlObject).Brush.WrapMode = gradientWrap.ToSD();
}