private void button8_Click(object sender, EventArgs e)
{
var obj = new ChartEllipse(chart1, new DPoint(1, 1), new DSize(7, 4));
obj.Text = "ddd";
obj.Font = new Font("Courier New", 14);
obj.TextBrush = new SolidBrush(Color.Red);
obj.IsFilled = true;
obj.FillBrush = new SolidBrush(Color.Blue);
chart1.PinMovableObjectAndAdd(obj);
}
/// <summary>
/// Получить описывающий
/// </summary>
/// <param name="candles"></param>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
private ChartEllipse BuildInclusiveEllipse(StockSeriesData candles, int start, int end)
{
if (start == end)
{
return(null);
}
float startvalue, endvalue;
if (candles[start].high > candles[end].high)
{
startvalue = candles[start].high;
endvalue = candles[end].low;
}
else
{
startvalue = candles[start].low;
endvalue = candles[end].high;
}
var A = new PointD(start, Convert.ToDouble(startvalue));
var B = new PointD(end, Convert.ToDouble(endvalue));
var C = new PointD();
double angle;
float cx, cy, a, b;
var S = float.NaN;
bool correctEllipse = false;
// поиск охватывающего эллипса
for (var i = start; i <= end; i++)
{
var d = new PointD(i, Convert.ToDouble(candles[i].high));
correctEllipse = Geometry.GetEllipseParams(A.ToPointF(), B.ToPointF(), d.ToPointF(), out angle, out a, out b, out cx, out cy);
if (float.IsNaN(S) || (correctEllipse && S < b))
{
S = b;
C = d;
}
d = new PointD(i, Convert.ToDouble(candles[i].low));
correctEllipse = Geometry.GetEllipseParams(A.ToPointF(), B.ToPointF(), d.ToPointF(), out angle, out a, out b, out cx, out cy);
if (float.IsNaN(S) || (correctEllipse && S < b))
{
S = b;
C = d;
}
}
correctEllipse = // пересчитываем параметры эллипса
Geometry.GetEllipseParams(A.ToPointF(), B.ToPointF(), C.ToPointF(), out angle, out a, out b, out cx, out cy);
if (correctEllipse)
{ // можно построить эллипс - рисуем его
var newEllipse = new ChartEllipse {
BuildTangent = true, angle = angle, a = a, b = b, cx = cx, cy = cy
};
newEllipse.AddPoint((float)A.X, (float)A.Y);
newEllipse.AddPoint((float)B.X, (float)B.Y);
newEllipse.AddPoint((float)C.X, (float)C.Y);
var minIndex = newEllipse.points.Min(p => p.X);
newEllipse.DateStart = owner.StockSeries.GetCandleOpenTimeByIndex((int)minIndex);
return(newEllipse);
}
return(null);
}
