public DataPoint GetDataPointFromMouseEvent(MouseButtonEventArgs e)
{
Polyline polyline1 = e.OriginalSource as Polyline;
if (polyline1 != null)
{
PolylineControl polyline2 = polyline1.Parent as PolylineControl;
if (polyline2 != null && polyline2.Parent is UIElement)
{
return((DataPoint)LineSeriesPresenter.FindDataPoint(polyline2, e.GetPosition((IInputElement)(polyline2.Parent as UIElement))));
}
}
return(this.GetDataPointFromVisualElement(e.OriginalSource as DependencyObject));
}
internal static XYDataPoint FindDataPoint(PolylineControl polyline, Point position)
{
XYDataPoint xyDataPoint1 = (XYDataPoint)null;
foreach (IAppearanceProvider appearanceProvider in polyline.Appearances)
{
XYDataPoint xyDataPoint2 = appearanceProvider as XYDataPoint;
if (xyDataPoint2 != null && xyDataPoint2.View != null && !xyDataPoint2.ActualIsEmpty)
{
if (xyDataPoint1 == null)
{
xyDataPoint1 = xyDataPoint2;
}
else if (LineSeriesPresenter.GetDistance(position, xyDataPoint2.View.AnchorPoint) < LineSeriesPresenter.GetDistance(position, xyDataPoint1.View.AnchorPoint))
{
xyDataPoint1 = xyDataPoint2;
}
}
}
return(xyDataPoint1);
}
private void Tooltip_Opened(object sender, RoutedEventArgs e)
{
this._tooltip.Content = (object)LineSeriesPresenter.FindDataPoint(this.PolylineControl, this._mousePosition).ToolTipContent;
}