Select curve chart WPF and nickname of curve in the ToolTip

Hello

How can I do, view the name of curve in the ToolTip, if I moved the mouse over the curve?
Or view the name of curve staring above the curve?
And, how can I select a curve with the click of a mouse?
Possible?

Kind regards
Tamas

P.S.: Community VS2013 & MS2015 Standard

Using the logic of tool tip of the point value of graphic display WPF overviewand the GetPlotAt function, here's an example that uses mouse clicks to select tracks in a chart:

partial class MainWindow: Window {}

_selectedPlot of private land;

public MainWindow () {}
InitializeComponent ();

Tour (option) on the hit test for lines, in addition to the actual data.
Graph HitTestMode in the Group PlotHitTestMode.RenderedInterpolation;

Updated tooltips to display quickly and for a long time.
ToolTipService.SetInitialShowDelay (graph, 0);
ToolTipService.SetShowDuration (graph, int. MaxValue);

Fill in the chart with the data and the locations of the example.
Graph BeginInit ().
var plotBrushes = new [] {Brushes.Red, Brushes.Orange, Brushes.Green, Brushes.Blue ;}
< plotbrushes.length;="" ++i="" )="">
label As String = "Plot" + (i + 1);
rendering engine of var = new LinePlotRenderer {Stroke = plotBrushes [i]};
var field = new plot (label) {Renderer = renderer};
Graph Plots.Add (field);

Graph data [i] = new [] {i, i + 1};
}
Graph EndInit ().

Monitor the plot area of the chart for mouse clicks.
Graph. PlotAreaMouseLeftButtonDown += OnPlotAreaMouseLeftButtonDown;
}

private void OnPlotAreaMouseLeftButtonDown (object sender, MouseButtonEventArgs e) {}
Check if a new route has been shown at the current position.
Point ScreenPosition = e.GetPosition (graph);
field var graphics = (Plot). GetPlotAt (screenPosition);
If (plot == null | plot == _selectedPlot)
return;

Deselect the previous plot, if it exists.
If (_selectedPlot! = null) {}
((LinePlotRenderer) _selectedPlot.Renderer). StrokeThickness = 1.0;
(Graph (ToolTip). Tool - tip). IsOpen = false;
}

Select the new path and display a ToolTip.
_selectedPlot = conspiracy;
((LinePlotRenderer) plot. Rendering engine). StrokeThickness = 2.0;
Graph ToolTip = new ToolTip {Content = string. Format ('"{0}' selected', plot. Label), IsOpen = true};
}
}

"Display the name of curve staring above the curve", with respect to the simplest approach would be to use a PointAnnotation to display a label to a particular position (probably hiding the target and arrow).

Tags: NI Software

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