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By James Richason - 5 Years Ago
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We have an old method that used to search for a DataPoint and then display that position on the chart. DataPoint is no longer found. Has something changed about how data points are added.
Here's the code:
private void OnValueChanged(object sender, EventArgs e)
{
var xAxisValue = DateTime.FromOADate(_chartHorizontalAxisCursor.Value);
double yAxisValue = _chartVerticalAxisCursor.Value;
NHitTestResult hitTest = _chartControl.HitTest(_mouseXPoint, _mouseYPoint);
if (hitTest.ChartElement == ChartElement.DataPoint)
{
if (GetChartCategory(_resultsViewInfo.ChartType) == ChartCategory.Column)
{
toolTip1.SetToolTip(_chartControl, "Y:" + yAxisValue.ToString("N"));
}
else
{
toolTip1.SetToolTip(_chartControl, "X:" + xAxisValue.ToString("MMM dd hh:mm:ss tt") + ", Y:" + yAxisValue.ToString("N"));
}
}
else
{
//toolTip1.SetToolTip(_chartControl, "JR");
toolTip1.SetToolTip(_chartControl, "Y:" + yAxisValue.ToString("N"));
}
}
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By Nevron Support - 5 Years Ago
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Hi James,
We just tested with the following code:
private void Form1_Load(object sender, EventArgs e)
{
NChart chart = nChartControl1.Charts[0];
chart.Enable3D = true;
NPointSeries point = new NPointSeries();
for (int i = 0; i < 10; i++)
{
point.Values.Add(i);
}
chart.Series.Add(point);
nChartControl1.MouseMove += NChartControl1_MouseMove;
}
private void NChartControl1_MouseMove(object sender, MouseEventArgs e)
{
NHitTestResult result = nChartControl1.HitTest(e.X, e.Y);
if (result.ChartElement == ChartElement.DataPoint)
{
textBox1.Text = "Data point: " + result.DataPointIndex.ToString();
}
else
{
textBox1.Text = result.ChartElement.ToString();
}
}
and hit testing was working properly - is there something specific about your configuration - like - 2D/3D, type of series etc...
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