private void TryCasheResources(IRenderContext2D context)
{
_strokePen = _strokePen ?? context.CreatePen(Stroke, AntiAliasing, (float)StrokeThickness, Opacity);
_gainFillBrush = _gainFillBrush ?? context.CreateBrush(GainMarkerFill);
_lossFillBrush = _lossFillBrush ?? context.CreateBrush(LossMarkerFill);
}
protected override void DrawInternal(IRenderContext2D context, IEnumerable<Point> centers, IPen2D pen, IBrush2D brush)
{
double halfWidth = Width / 2;
double halfHeight = Height / 2;
foreach (var center in centers)
{
double top = center.Y - halfHeight;
double bottom = center.Y + halfHeight;
double left = center.X - halfWidth;
double right = center.X + halfWidth;
// x0
//
//x1 x2
var points = new[]
{
new Point(right,top),
new Point(right,bottom),
new Point(left,bottom),
new Point(right,top)
};
context.FillPolygon(brush, points);
context.DrawLines(pen, points);
}
}
protected override void DrawInternal(IRenderContext2D context, IEnumerable<Point> centers, IPen2D pen, IBrush2D brush)
{
float width2 = (float)(Width * 0.5);
float height2 = (float)(Height * 0.5);
foreach (var center in centers)
{
double top = center.Y - height2;
double bottom = center.Y + height2;
double left = center.X - width2;
double right = center.X + width2;
var diamondPoints = new[]
{
// Points drawn like this:
//
// x0 (x4 in same location as x0)
//
// x3 x1
//
// x2
new Point(center.X, top), // x0
new Point(right, center.Y), // x1
new Point(center.X, bottom), // x2
new Point(left, center.Y), // x3
new Point(center.X, top), // x4 == x0
};
context.FillPolygon(brush, diamondPoints);
context.DrawLines(pen, diamondPoints);
}
}
protected override void DrawInternal(IRenderContext2D context, double x, double y, IPen2D pen, IBrush2D brush)
{
List<Point> lst = new List<Point>();
lst.Add(new Point
{
X = x,
Y = y
});
DrawInternal(context, lst, pen, brush);
}
protected static void DrawRectangle(IRenderContext2D renderContext, IPen2D pen, IBrush2D brush, ICoordinateCalculator<double> xcal,
ICoordinateCalculator<double> ycal, float xv, float yv, float wv, float hv)
{
var x1 = xcal.GetCoordinate(xv);
var y1 = ycal.GetCoordinate(yv);
var x2 = xcal.GetCoordinate(xv + wv);
var y2 = ycal.GetCoordinate(yv + hv);
var pt1 = new Point(x1, y1);
var pt2 = new Point(x2, y2);
renderContext.FillRectangle(brush, pt1, pt2);
renderContext.DrawQuad(pen, pt1, pt2);
}
protected static void DrawRectangle(IRenderContext2D renderContext, IPen2D pen, IBrush2D brush, ICoordinateCalculator <double> xcal,
ICoordinateCalculator <double> ycal, float xv, float yv, float wv, float hv)
{
var x1 = xcal.GetCoordinate(xv);
var y1 = ycal.GetCoordinate(yv);
var x2 = xcal.GetCoordinate(xv + wv);
var y2 = ycal.GetCoordinate(yv + hv);
var pt1 = new Point(x1, y1);
var pt2 = new Point(x2, y2);
renderContext.FillRectangle(brush, pt1, pt2);
renderContext.DrawQuad(pen, pt1, pt2);
}
private void DrawDiamond(IRenderContext2D context, Point center, double width, double height, IPen2D stroke, IBrush2D fill)
{
double top = center.Y - height;
double bottom = center.Y + height;
double left = center.X - width;
double right = center.X + width;
var diamondPoints = new[]
{
// Points drawn like this:
//
// x0 (x4 in same location as x0)
//
// x3 x1
//
// x2
new Point(center.X, top),
new Point(right, center.Y),
new Point(center.X, bottom),
new Point(left, center.Y),
new Point(center.X, top),
};
context.FillPolygon(fill, diamondPoints);
context.DrawLines(stroke, diamondPoints);
}
protected override void RenderToCache(IRenderContext2D context, IPen2D strokePen, IBrush2D fillBrush)
{
var offset = 2d;
var polygon = new Point[] { new Point(Width / 2, 0), new Point(Width / 2 + offset, Height / 2 - offset), new Point(Width, Height / 2), new Point(Width / 2 + offset, Height / 2 + offset), new Point(Width / 2, Height), new Point(Width / 2 - offset, Height / 2 + offset), new Point(0, Height / 2), new Point(Width / 2 - offset, Height / 2 - offset), new Point(Width / 2, 0) };
context.FillPolygon(fillBrush, polygon);
context.DrawLines(strokePen, polygon);
}
protected override void DrawInternal(IRenderContext2D context, double x, double y, IPen2D pen, IBrush2D brush)
{
List<Point> center = new List<Point>();
center.Add(new Point(x, y));
DrawInternal(context, center, pen, brush);
}