public GradientHeader()
{
_startColor = this.BackColor;
_endColor = this.ForeColor;
this.ResizeRedraw = true;
_gradientHelper = new GradientHelper<GradientHeader>(this);
}
public void Draw(GraphicsHandler graphics, RectangleF rect)
{
var start = StartPoint;
var end = EndPoint;
if (transform != null)
{
start = transform.TransformPoint(start);
end = transform.TransformPoint(end);
}
if (wrap == GradientWrapMode.Pad)
{
if (Gradient == null)
{
Gradient = new CGGradient(CGColorSpace.CreateDeviceRGB(), new [] { StartColor, EndColor }, new nnfloat[] { (nnfloat)0f, (nnfloat)1f });
}
}
else
{
var scale = GradientHelper.GetLinearScale(ref start, ref end, rect, lastScale, wrap == GradientWrapMode.Reflect ? 2f : 1f);
if (Gradient == null || scale > lastScale)
{
var stops = GradientHelper.GetGradientStops(StartColor, EndColor, scale, wrap).ToList();
Gradient = new CGGradient(CGColorSpace.CreateDeviceRGB(), stops.Select(r => r.Item2).ToArray(), stops.Select(r => (nnfloat)r.Item1).ToArray());
lastScale = scale;
}
}
var context = graphics.Control;
context.DrawLinearGradient(Gradient, start.ToNS(), end.ToNS(), CGGradientDrawingOptions.DrawsAfterEndLocation | CGGradientDrawingOptions.DrawsBeforeStartLocation);
}
public void Draw(GraphicsHandler graphics, bool stroke, FillMode fillMode, bool clip)
{
var outerRadius = Radius.Width;
var yscale = Radius.Height / Radius.Width;
var center = Center;
var origin = GradientOrigin;
var scale = 1f;
var rect = graphics.Control.GetPathBoundingBox().ToEto();
if (stroke)
{
graphics.Control.ReplacePathWithStrokedPath();
}
if (clip)
{
graphics.Clip(fillMode);
}
if (wrap != GradientWrapMode.Pad)
{
// use eto's transformrectangle as it'll make the rect encompass the resulting transformed area
var boundRect = transform.Invert().ToEto().TransformRectangle(rect);
// find max number of iterations we need to fill the bounding rectangle
scale = GradientHelper.GetRadialScale(Center, Radius, GradientOrigin, boundRect);
}
if (Gradient == null || scale > lastScale)
{
var stops = GradientHelper.GetGradientStops(StartColor.ToCG(), EndColor.ToCG(), scale, wrap).ToList();
lastScale = scale;
Gradient = new CGGradient(CGColorSpace.CreateDeviceRGB(), stops.Select(r => r.Item2).ToArray(), stops.Select(r => (nfloat)r.Item1).ToArray());
}
else
{
scale = lastScale;
}
var scaledRect = new RectangleF(GradientOrigin - (GradientOrigin - Center + Radius) * scale, GradientOrigin + (Center + Radius - GradientOrigin) * scale);
center = scaledRect.Center;
outerRadius *= scale;
// adjust center based on ellipse scale from gradient origin
center.Y = origin.Y - (origin.Y - center.Y) / yscale;
// scale to draw elliptical gradient
var t = new CGAffineTransform(1, 0f, 0f, yscale, 0, origin.Y - origin.Y * yscale);
t.Multiply(transform);
graphics.Control.SaveState();
graphics.Control.ConcatCTM(t);
graphics.Control.DrawRadialGradient(Gradient, origin.ToNS(), 0, center.ToNS(), outerRadius, CGGradientDrawingOptions.DrawsAfterEndLocation | CGGradientDrawingOptions.DrawsBeforeStartLocation);
graphics.Control.RestoreState();
}
public void GradientsTest()
{
var img = ImageHelper.LoadImageAsInt(TestResources.Bikesgray);
Normalizer.Normalize(100, 500, img);
var grad = GradientHelper.GenerateGradient(img);
var path = Path.GetTempPath() + "grad.png";
ImageHelper.SaveIntArray(grad, path);
Process.Start(path);
}
public GradientPanel()
{
// Set the styles to make things draw properly:
base.SetStyle(
ControlStyles.AllPaintingInWmPaint |
ControlStyles.DoubleBuffer |
ControlStyles.ResizeRedraw |
ControlStyles.SupportsTransparentBackColor,
true);
_gradientHelper = new GradientHelper<GradientPanel>(this);
this.ResizeRedraw = true;
}
/// <inheritdoc />
/// <summary>
/// Gets the color at an specific point assuming the brush is drawn into the given rectangle.
/// </summary>
/// <param name="rectangle">The rectangle in which the brush should be drawn.</param>
/// <param name="renderTarget">The target (key/point) from which the color should be taken.</param>
/// <returns>The color at the specified point.</returns>
protected override Color GetColorAtPoint(Rectangle rectangle, BrushRenderTarget renderTarget)
{
if (Gradient == null)
{
return(Color.Transparent);
}
Point startPoint = new Point(StartPoint.X * rectangle.Size.Width, StartPoint.Y * rectangle.Size.Height);
Point endPoint = new Point(EndPoint.X * rectangle.Size.Width, EndPoint.Y * rectangle.Size.Height);
double offset = GradientHelper.CalculateLinearGradientOffset(startPoint, endPoint, renderTarget.Point);
return(Gradient.GetColor(offset));
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientHelper stack = (GradientHelper)this.Element;
CGColor startColor = stack.StartColor.ToCGColor();
CGColor endColor = stack.EndColor.ToCGColor();
var gradientLayer = new CAGradientLayer();
gradientLayer.Frame = rect;
gradientLayer.Colors = new CGColor[] { startColor, endColor };
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
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);
}
/// <summary>
/// Gets the color at an specific point assuming the brush is drawn into the given rectangle.
/// </summary>
/// <param name="rectangle">The rectangle in which the brush should be drawn.</param>
/// <param name="renderTarget">The target (key/point) from which the color should be taken.</param>
/// <returns>The color at the specified point.</returns>
protected override CorsairColor GetColorAtPoint(RectangleF rectangle, BrushRenderTarget renderTarget)
{
if (Gradient == null)
{
return(CorsairColor.Transparent);
}
PointF centerPoint = new PointF(rectangle.X + rectangle.Width * Center.X, rectangle.Y + rectangle.Height * Center.Y);
// Calculate the distance to the farthest point from the center as reference (this has to be a corner)
// ReSharper disable once RedundantCast - never trust this ...
float refDistance = (float)Math.Max(Math.Max(Math.Max(GradientHelper.CalculateDistance(rectangle.Location, centerPoint),
GradientHelper.CalculateDistance(new PointF(rectangle.X + rectangle.Width, rectangle.Y), centerPoint)),
GradientHelper.CalculateDistance(new PointF(rectangle.X, rectangle.Y + rectangle.Height), centerPoint)),
GradientHelper.CalculateDistance(new PointF(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height), centerPoint));
float distance = GradientHelper.CalculateDistance(renderTarget.Point, centerPoint);
float offset = distance / refDistance;
return(Gradient.GetColor(offset));
}
public object Create(RectangleF rectangle, Color startColor, Color endColor, float angle)
{
GradientHelper.GetLinearFromRectangle(rectangle, angle, out var startPoint, out var endPoint);
return(Create(startColor, endColor, startPoint, endPoint));
}
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 override void ModifyVertices(List <UIVertex> vertexList)
{
GradientHelper.modifyVertices(vertexList, (c, t) => Color32.Lerp(bottomColor, topColor, t));
}
