private void chart1_MouseMove(object sender, MouseEventArgs e)
{
var pos = e.Location;
if (_prevPosition.HasValue && pos == _prevPosition.Value)
{
return;
}
_tooltip.RemoveAll();
_prevPosition = pos;
var results = chrtUren.HitTest(pos.X, pos.Y, false, ChartElementType.DataPoint);
foreach (var result in results)
{
if (result.ChartElementType != ChartElementType.DataPoint)
{
continue;
}
var prop = result.Object as DataPoint;
if (prop == null || chrtUren.Series[1].Points.Contains(prop))
{
continue;
}
var pointXPixel = result.ChartArea.AxisX.ValueToPixelPosition(prop.XValue);
var pointYPixel = result.ChartArea.AxisY.ValueToPixelPosition(prop.YValues[0]);
if (Math.Abs(pos.X - pointXPixel) < 2 && Math.Abs(pos.Y - pointYPixel) < 2)
{
_tooltip.Show(StringLayer.GetToolTip(prop), chrtUren, pos.X, pos.Y - 15);
}
}
}
