internal override async void Drawing()
{
if (OwnerChart == null || OwnerChart.ItemsSource == null || OwnerChart.XAxis == null || OwnerChart.YAxis == null)
{
return;
}
IEnumerable <IList> items = OwnerChart.ItemsSource;
IAxis xaxis = OwnerChart.XAxis;
IAxis yaxis = OwnerChart.YAxis;
if (OwnerChart.X < 0)
{
OwnerChart.X = 0;
}
int x = OwnerChart.X;
if (OwnerChart.Y < 0)
{
OwnerChart.Y = 1;
}
int y = OwnerChart.Y;
using (var getdatatask = xaxis.GetHistogramViewData(items, x, Count))
{
var datas = await getdatatask;
if (datas.Count() <= 0)
{
var tempdc = DV.RenderOpen();
tempdc.DrawLine(new Pen(this.Stroke, 0), new Point(0, 0), new Point(0, 0));
tempdc.Close();
return;
}
var maxy = datas.Max(p => p.Value);
yaxis.Max = maxy * 1.2;
yaxis.Min = 0;
yaxis.Drawing();
var height = this.ActualHeight;
Func <double, ValueLocationConvertParam, double> YGetLocation = yaxis.GetValueLocation;
var yconvert = yaxis.GetConvertParam();
var task = Task.Run(() =>
{
var streamGeometry = new StreamGeometry()
{
FillRule = FillRule.EvenOdd
};
using (StreamGeometryContext sgc = streamGeometry.Open())
{
List <Point> points = new List <Point>();
foreach (var data in datas)
{
var yvalue = YGetLocation(data.Value, yconvert);
if (double.IsNaN(data.Key[0]) || double.IsInfinity(data.Key[0]) ||
double.IsNaN(data.Key[1]) || double.IsInfinity(data.Key[1]) ||
double.IsNaN(yvalue) || double.IsInfinity(yvalue))
{
continue;
}
points.Add(new Point(data.Key[0], yvalue));
points.Add(new Point(data.Key[1], yvalue));
}
if (points.Count > 0)
{
points.Add(new Point(points[points.Count - 1].X, height));
points.Add(new Point(points[0].X, height));
sgc.BeginFigure(new Point(points[0].X, height), true, true);
sgc.PolyLineTo(points, false, false);
}
else
{
sgc.BeginFigure(new Point(0, 0), true, true);
sgc.LineTo(new Point(0, 0), false, false);
}
sgc.Close();
}
streamGeometry.Freeze();
return(streamGeometry);
});
var geometryTemp = await task;
task.Dispose();
var dc = DV.RenderOpen();
base.ClearTransform();
dc.DrawGeometry(this.Fill, new Pen(this.Stroke, 1), geometryTemp);
dc.Close();
}
}
