WPF IntensityGraph, display cell value on mouse event

[kirko7]

Is there a way to display value of a cell in a "tooltip-like" popup when you click/hover anywhere on IntensityGraph?

Thank you

[phansen · Accepted solution]

Using the technique from WPF graph display point value on hover, here is a version specific to intensity data:

    private static readonly GraphQueryArgs query = new GraphQueryArgs(
        PlotsToSearch.Any, SearchDimensions.HorizontalAndVertical,
        SearchDirections.ForwardAndReverse, isInclusive: true );

    public MainWindow( ) {
        InitializeComponent( );

        graph.PlotAreaMouseMove += this.OnPlotAreaMouseMove;
        graph.PlotAreaMouseLeave += delegate { graph.ToolTip = null; };
        ToolTipService.SetInitialShowDelay( graph, 0 );
        ToolTipService.SetShowDuration( graph, int.MaxValue );
    }

    private void OnPlotAreaMouseMove( object sender, MouseEventArgs e ) {
        IPlot plot = graph.AllPlots[0];
        Point screenPosition = graph.GetPlotAreaPosition( e );
        Point relativePosition = graph.ScreenToRelative( screenPosition );

        PlotValue nearestValue = graph.FindNearestValue( plot, relativePosition, query );
        if( nearestValue != null )
            graph.ToolTip = string.Format(
                "Nearest intensity value is {2} at ({0},{1}).",
                nearestValue.Value.Cast<object>( ).ToArray( ) );
    }

[kirko7]

Much appreciated!