Demo: Add example for Scatter.GetNearest() using multiple scatter plots #3503
Description
I successfully implemented suggestion for handling the MouseMove event in charts with only one dataset with ScottPlot 5 in VB .NET. However, I’m facing another situation with multiple curves being drawn, but MyCrosshair is only triggered for the last dataset. I suspect this problem is related to the following method that uses ‘PltPerfElev.Plot.LastRender’:
Dim nearest As DataPoint = splt.Data.GetNearest(mouseLocation, PltPerfElev.Plot.LastRender)
Is it possible to review the following code to present CrossHair for the entire dataset?
Here is my VB. NET implementation.
Private Sub MouseMoveHandler(
s As Object, e As MouseEventArgs)
Dim mousePixel As New Pixel(
e.Location.X, e.Location.Y)
Dim mouseLocation As Coordinates =
PltPerfElev.Plot.GetCoordinates(mousePixel)
Dim nearest As DataPoint = splt.Data.
GetNearest(mouseLocation, PltPerfElev.Plot.LastRender)
If nearest.IsReal Then
MyCrosshair.IsVisible = True
MyCrosshair.Position = nearest.Coordinates
PltPerfElev.Refresh()
lbPerfElev.Text = $" X = {nearest.X:#,##0.0} m " &
$" - Y = {nearest.Y:#,##0.0} cm"
ElseIf MyCrosshair.IsVisible Then
MyCrosshair.IsVisible = False
PltPerfElev.Refresh()
lbPerfElev.Text = $""
End If
End Sub