private void PaintFunction(ChartGraphics g, FunctionViewInfo function)
{
int beginIndex = this.Owner.HorizontalScale.Position;
int endIndex = beginIndex + this.Owner.HorizontalScale.CountBarView;
int countBar = function.Function.Count;
endIndex = Math.Min(endIndex, countBar);
g.SelectPen(new GdiPen(function.Color, function.Width));
bool first = true;
int zeroY = 0;
for (int i = beginIndex; i < endIndex; i++)
{
float value = function.Function.Items[i];
if (float.IsNaN(value))
{
continue;
}
int x = this.Owner.HorizontalScale.GetX(i);
int y = this.GetY(value);
if (function.Style == FunctionStyle.Histogram)
{
if (first)
{
first = false;
zeroY = this.GetY(0);
}
g.DrawLine(x, zeroY, x, y);
}
else
{
if (first)
{
first = false;
g.MoveTo(x, y);
}
else
{
g.LineTo(x, y);
}
}
}
}
protected override void OnCalculateScale()
{
IBarsData bars = this.Owner.Owner.Bars;
if (_currentIV == null ||
_currentIV.TimeFrame.Second != this.Owner.Owner.Bars.TimeFrame.Second)
{
_views.TryGetValue(bars.TimeFrame.Second, out _currentIV);
if (_currentIV == null)
{
ParameterCollection inputs = new ParameterCollection();
inputs.AddRange(_classBuilder.Parameters);
Parameter iBarsParam = inputs["iBars"];
if (iBarsParam == null)
{
iBarsParam = new Parameter(this.iBars, "iBars");
inputs.Add(iBarsParam);
}
iBarsParam.Value = this.iBars;
Indicator indicator = _classBuilder.CreateInstance(inputs.ToArray()) as Indicator;
PropertyInfo[] properties = _classBuilder.ClassType.GetProperties();
List <FunctionViewInfo> functions = new List <FunctionViewInfo>();
foreach (PropertyInfo property in properties)
{
FunctionViewInfo fview = new FunctionViewInfo(property);
if ((int)fview.Error == -1)
{
functions.Add(fview);
fview.Join(indicator);
}
}
_currentIV = new IndicatorView(bars.TimeFrame, indicator, functions.ToArray());
_views.Add(bars.TimeFrame.Second, _currentIV);
}
_savedCountTick = -1;
}
int countTick = this.Owner.Owner.Symbol.Ticks.Count;
int beginIndex = this.Owner.HorizontalScale.Position;
if (_savedCountTick == countTick && _savedPosition == beginIndex && _savedWidth == this.Owner.Width)
{
return;
}
_savedCountTick = countTick;
_savedPosition = beginIndex;
_savedWidth = this.Owner.Width;
int cntBarW = this.Owner.HorizontalScale.CountBarView;
int endIndex = beginIndex + cntBarW;
int countBar = bars.Count;
this.iBars.Limit = this.LimitCompute;
this.iBars.SetLimit(beginIndex, cntBarW);
endIndex = Math.Min(endIndex, countBar);
if (endIndex - beginIndex == 0)
{
return;
}
float min = float.MaxValue;
float max = float.MinValue;
FunctionViewInfo[] fvs = _currentIV.FunctionsView;
float val = float.NaN;
for (int j = 0; j < fvs.Length; j++)
{
Function f = fvs[j].Function as Function;
f.NativeCompute();
for (int i = beginIndex; i < endIndex; i++)
{
val = f.NativeGetItem(i);
if (!float.IsNaN(val))
{
min = Math.Min(min, val);
max = Math.Max(max, val);
}
}
}
this.Owner.VerticalScale.SetScaleValue(min, max, this.Owner.Owner.Symbol.Digits);
}
