private void wpfPlot1_MouseMove(object sender, MouseEventArgs e)
{
// determine point nearest the cursor
(double mouseCoordX, double mouseCoordY) = wpfPlot1.GetMouseCoordinates();
double xyRatio = wpfPlot1.Plot.XAxis.Dims.PxPerUnit / wpfPlot1.Plot.YAxis.Dims.PxPerUnit;
(double pointX, double pointY, int pointIndex) = MyScatterPlot.GetPointNearest(mouseCoordX, mouseCoordY, xyRatio);
// place the highlight over the point of interest
HighlightedPoint.X = pointX;
HighlightedPoint.Y = pointY;
HighlightedPoint.IsVisible = true;
// render if the highlighted point chnaged
if (LastHighlightedIndex != pointIndex)
{
LastHighlightedIndex = pointIndex;
wpfPlot1.Refresh();
}
// update the GUI to describe the highlighted point
double mouseX = e.GetPosition(this).X;
double mouseY = e.GetPosition(this).Y;
label1.Content = $"Closest point to ({mouseX:N2}, {mouseY:N2}) " +
$"is index {pointIndex} ({pointX:N2}, {pointY:N2})";
}
private void MouseMove(object sender, PointerEventArgs e)
{
// determine point nearest the cursor
(double mouseCoordX, double mouseCoordY) = avaPlot1.GetMouseCoordinates();
double xyRatio = avaPlot1.Plot.XAxis.Dims.PxPerUnit / avaPlot1.Plot.YAxis.Dims.PxPerUnit;
(double pointX, double pointY, int pointIndex) = MyScatterPlot.GetPointNearest(mouseCoordX, mouseCoordY, xyRatio);
// place the highlight over the point of interest
HighlightedPoint.Xs[0] = pointX;
HighlightedPoint.Ys[0] = pointY;
HighlightedPoint.IsVisible = true;
// render if the highlighted point chnaged
if (LastHighlightedIndex != pointIndex)
{
LastHighlightedIndex = pointIndex;
avaPlot1.Render();
}
// update the GUI to describe the highlighted point
(double mouseX, double mouseY) = avaPlot1.GetMouseCoordinates();
this.Find <TextBlock>("label1").Text = $"Closest point to ({mouseX:N0}, {mouseY:N0}) " +
$"is index {pointIndex} ({pointX:N2}, {pointY:N2})";
}