protected override void PrepareDataPoint(DataPoint dataPoint, object dataContext)
{
base.PrepareDataPoint(dataPoint, dataContext);
CandlestickDataPoint candlestickDataPoint = (CandlestickDataPoint)dataPoint;
candlestickDataPoint.SetBinding(CandlestickDataPoint.OpenProperty, OpenValueBinding);
candlestickDataPoint.SetBinding(CandlestickDataPoint.CloseProperty, CloseValueBinding);
candlestickDataPoint.SetBinding(CandlestickDataPoint.HighProperty, HighValueBinding);
candlestickDataPoint.SetBinding(CandlestickDataPoint.LowProperty, LowValueBinding);
}
/// <summary>
/// This method updates a single data point.
/// </summary>
/// <param name="dataPoint">The data point to update.</param>
protected override void UpdateDataPoint(DataPoint dataPoint)
{
CandlestickDataPoint candlestickDataPoint = (CandlestickDataPoint)dataPoint;
FrameworkElement fe = ActualIndependentRangeAxis as FrameworkElement;
if (fe != null)
{
if (fe.ActualWidth == 0.0)
{
return;
}
}
if (!axesHasBeenUpdated)
{
return;
}
double PlotAreaHeight = ActualDependentRangeAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Range.Maximum);
double dataPointX = ActualIndependentRangeAxis.GetPlotAreaCoordinate(ValueHelper.ToComparable(dataPoint.ActualIndependentValue));
double highPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(candlestickDataPoint.High);
double lowPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(candlestickDataPoint.Low);
double openPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(candlestickDataPoint.Open);
double closePointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(candlestickDataPoint.Close);
if (closePointY > openPointY)
{
candlestickDataPoint.Background = positiveBrush;
}
else
{
candlestickDataPoint.Background = negativeBrush;
}
candlestickDataPoint.UpdateBody(ActualDependentRangeAxis);
if (ValueHelper.CanGraph(dataPointX))
{
dataPoint.Height = Math.Abs(highPointY - lowPointY);
dataPoint.Width = 5.0;
dataPoint.UpdateLayout();
Canvas.SetLeft(dataPoint,
Math.Round(dataPointX - (dataPoint.ActualWidth / 2)));
Canvas.SetTop(dataPoint,
Math.Round(PlotAreaHeight - highPointY));
}
}
