Demonstrates the use of the TooltipModifier, part of the ChartModifier API for getting information about Renderable Series and its displaying on tooltips.

An ItemsControl data-binds to a collection of RolloverModifier.SeriesData.SeriesInfo collection.

The SeriesInfo is like a ViewModel for the data-point, and each SeriesInfo derived type contains the X,Y values of the series under the cursor, the series color and the series name

Documentation Links

• ChartModifiers in SciChart
• TooltipModifier Documentation.

// SeriesTooltipsExample.xaml

<UserControl x:Class="SciChart.Examples.Examples.InspectDatapoints.SeriesTooltipsExample"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:SciChart.Examples.Examples.InspectDatapoints"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:s="http://schemas.abtsoftware.co.uk/scichart"
             d:DesignHeight="400"
             d:DesignWidth="600"
             mc:Ignorable="d">

  <UserControl.Resources>
    <local:SeriesTooltipsViewModel x:Key="SeriesTooltipsViewModel" />
    <s:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />

    <Style TargetType="s:FastLineRenderableSeries">
      <Setter Property="SelectedSeriesStyle">
        <Setter.Value>
          <Style TargetType="s:FastLineRenderableSeries">
            <Setter Property="PointMarkerTemplate">
              <Setter.Value>
                <ControlTemplate>
                  <s:EllipsePointMarker Width="7"
                                        Height="7"
                                        Fill="#555"
                                        Stroke="#555"
                                        StrokeThickness="1" />
                </ControlTemplate>
              </Setter.Value>
            </Setter>
          </Style>
        </Setter.Value>
      </Setter>
    </Style>

    <local:ThresholdBackgroundConverter x:Key="ThresholdForegroundConverter"
                                        DefaultBrush="Yellow"
                                        HighThresholdBrush="#00AA00"
                                        LowThresholdBrush="Red"/>

    <DataTemplate x:Key="TooltipItemTemplate" DataType="local:TooltipViewModel">
      <Grid>
        <StackPanel Orientation="Vertical" Margin="2">
          <TextBlock FontSize="14"
                     FontWeight="Bold"
                     Foreground="{Binding Path=.,
                                                    Converter={StaticResource ThresholdForegroundConverter}}"
                     Text="{Binding Title}" />
          <Border Height="1"
                  HorizontalAlignment="Stretch"
                  VerticalAlignment="Center"
                  Background="{Binding Path=.,
                                                 Converter={StaticResource ThresholdForegroundConverter}}" />

          <TextBlock FontSize="12" Foreground="{Binding Path=., Converter={StaticResource ThresholdForegroundConverter}}">
            <Run FontWeight="Bold" Text="X: " />
            <Run Text="{Binding XValue, StringFormat=\{0:0.000\}}" />

          </TextBlock>

          <TextBlock FontSize="12" Foreground="{Binding Path=., Converter={StaticResource ThresholdForegroundConverter}}">
            <Run FontWeight="Bold" Text="Y: " />
            <Run Text="{Binding YValue, StringFormat=\{0:0.000\}}" />

          </TextBlock>

          <TextBlock FontWeight="Bold"
                     Foreground="{Binding Path=.,
                                                    Converter={StaticResource ThresholdForegroundConverter}}"
                     Text="OVER THRESHOLD"
                     Visibility="{Binding OverThreshold,
                                                    Converter={StaticResource BooleanToVisibilityConverter}}" />
          <TextBlock FontWeight="Bold"
                     Foreground="{Binding Path=.,
                                                    Converter={StaticResource ThresholdForegroundConverter}}"
                     Text="UNDER THRESHOLD"
                     Visibility="{Binding UnderThreshold,
                                                    Converter={StaticResource BooleanToVisibilityConverter}}" />
        </StackPanel>
        <Rectangle Fill="{Binding Path=.,
                                          Converter={StaticResource ThresholdForegroundConverter},
                                          ConverterParameter=0.3}"
                    Stroke="{Binding Path=.,
                                          Converter={StaticResource ThresholdForegroundConverter}}"
                    StrokeThickness="1"/>
      </Grid>
    </DataTemplate>

  </UserControl.Resources>

  <Grid>
    <s:SciChartSurface DataContext="{StaticResource SeriesTooltipsViewModel}" s:ThemeManager.Theme="SciChartv4Dark">

      <s:SciChartSurface.RenderableSeries>
        <s:FastLineRenderableSeries DataSeries="{Binding DataSeries1}"
                                    Stroke="SteelBlue"
                                    s:TooltipModifier.TooltipTemplate="{StaticResource TooltipItemTemplate}">
          <s:FastLineRenderableSeries.PointMarkerTemplate>
            <ControlTemplate>
              <s:EllipsePointMarker Width="5"
                                    Height="5"
                                    Fill="SteelBlue" />
            </ControlTemplate>
          </s:FastLineRenderableSeries.PointMarkerTemplate>
        </s:FastLineRenderableSeries>
        <s:FastLineRenderableSeries DataSeries="{Binding DataSeries2}"
                                    Stroke="#FF3333"
                                    s:TooltipModifier.TooltipTemplate="{StaticResource TooltipItemTemplate}">
          <s:FastLineRenderableSeries.PointMarkerTemplate>
            <ControlTemplate>
              <s:EllipsePointMarker Width="5"
                                    Height="5"
                                    Fill="#FF3333" />
            </ControlTemplate>
          </s:FastLineRenderableSeries.PointMarkerTemplate>
        </s:FastLineRenderableSeries>
      </s:SciChartSurface.RenderableSeries>

      <s:SciChartSurface.XAxis>
        <s:NumericAxis GrowBy="0.1, 0.1" />
      </s:SciChartSurface.XAxis>

      <s:SciChartSurface.YAxis>
        <s:NumericAxis AxisAlignment="Left" GrowBy="0.1, 0.1" />
      </s:SciChartSurface.YAxis>

      <s:SciChartSurface.Annotations>
        <s:HorizontalLineAnnotation HorizontalAlignment="Stretch"
                      FontSize="13"
                      IsEditable="True"
                      LabelPlacement="Axis"
                      LabelTextFormatting="0.00"
                      ShowLabel="True"
                      Stroke="{Binding HighThresholdBrush, Source={StaticResource ThresholdForegroundConverter}}"
                      StrokeThickness="2"
                      Y1="{Binding HighThreshold,
                                            Mode=TwoWay}" />
        <s:HorizontalLineAnnotation HorizontalAlignment="Stretch"
                                    FontSize="13"
                                    IsEditable="True"
                                    LabelPlacement="Axis"
                                    LabelTextFormatting="0.00"
                                    ShowLabel="True"
                                    Stroke="{Binding LowThresholdBrush, Source={StaticResource ThresholdForegroundConverter}}"
                                    StrokeThickness="2"
                                    Y1="{Binding LowThreshold,
                                                         Mode=TwoWay}" />
      </s:SciChartSurface.Annotations>

      <s:SciChartSurface.ChartModifier>
        <s:ModifierGroup>
          <s:RubberBandXyZoomModifier />
          <s:ZoomExtentsModifier />
          <s:TooltipModifier ReceiveHandledEvents="True"
                             ShowTooltipOn="Always"
                             TooltipLabelDataContextSelector="{Binding TooltipDataContext}"
                             UseInterpolation="True" />
        </s:ModifierGroup>
      </s:SciChartSurface.ChartModifier>

    </s:SciChartSurface>
  </Grid>
</UserControl>

// SeriesTooltipsExample.xaml.cs

// *************************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//  
// Web: http://www.scichart.com
//   Support: support@scichart.com
//   Sales:   sales@scichart.com
// 
// SeriesTooltipsExample.xaml.cs is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use. 
// 
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied. 
// *************************************************************************************
using System.Windows.Controls;

namespace SciChart.Examples.Examples.InspectDatapoints
{
    /// <summary>
    /// Interaction logic for SeriesTooltipsExample.xaml
    /// </summary>
    public partial class SeriesTooltipsExample : UserControl
    {
        public SeriesTooltipsExample()
        {
            InitializeComponent();
        }
    }
}

// SeriesTooltipsViewModel.cs

// *************************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//  
// Web: http://www.scichart.com
//   Support: support@scichart.com
//   Sales:   sales@scichart.com
// 
// SeriesTooltipsViewModel.cs is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use. 
// 
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied. 
// *************************************************************************************
using System;
using System.Linq;
using System.Windows.Media;
using SciChart.Charting.Model.ChartData;
using SciChart.Charting.Model.DataSeries;
using SciChart.Examples.ExternalDependencies.Common;
using SciChart.Examples.ExternalDependencies.Data;

namespace SciChart.Examples.Examples.InspectDatapoints
{
    public class SeriesTooltipsViewModel : BaseViewModel
    {
        private IXyDataSeries<double, double> _dataSeries1;
        private IXyDataSeries<double, double> _dataSeries2;
        
        private double _highThreshold;
        private double _lowThreshold;
        
        public SeriesTooltipsViewModel()
        {
            DataSeries1 = new XyDataSeries<double, double> {SeriesName = "Lissajous Curve", AcceptsUnsortedData = true};

            var data1 = DataManager.Instance.GetLissajousCurve(0.8, 0.2, 0.43, 500);

            // just scale the data in X a bit so it matches sinewave data. This is purely for the demo purposes
            DataSeries1.Append(data1.XData.Select(x => (x + 1.0) * 5.0), data1.YData);

            DataSeries2 = new XyDataSeries<double, double> { SeriesName = "Sinewave" };

            var data2 = DataManager.Instance.GetSinewave(1.5, 1.0, 500);

            DataSeries2.Append(data2.XData, data2.YData); 

            LowThreshold = -0.5d;
            HighThreshold = 0.5d;
        }

        public IXyDataSeries<double, double> DataSeries2
        {
            get { return _dataSeries2; }
            set
            {
                if (_dataSeries2 == value) return;
                _dataSeries2 = value;
                OnPropertyChanged("DataSeries2");
            }
        }

        public IXyDataSeries<double, double> DataSeries1
        {
            get { return _dataSeries1; }
            set
            {
                if (_dataSeries1 == value) return;
                _dataSeries1 = value;
                OnPropertyChanged("DataSeries1");
            }
        }

        public double HighThreshold
        {
            get { return _highThreshold; }
            set
            {
                if (_highThreshold == value) return;
                _highThreshold = value;
                OnPropertyChanged("HighThreshold");
            }
        }

        public double LowThreshold
        {
            get { return _lowThreshold; }
            set
            {
                if (_lowThreshold == value) return;
                _lowThreshold = value;
                OnPropertyChanged("LowThreshold");
            }
        }

        public Func<SeriesInfo, object> TooltipDataContext
        {
            get
            {
                return seriesInfo =>
                {
                    // Create and return a ToolTipViewModel for the tooltip
				    var vm = new TooltipViewModel
				    {
                        XValue = Convert.ToDouble(seriesInfo.XValue),
                        YValue = Convert.ToDouble(seriesInfo.YValue),
                        HighThreshold = this.HighThreshold,
                        LowThreshold = this.LowThreshold,                        
                        Title = seriesInfo.RenderableSeries.DataSeries.SeriesName,
                        Stroke = seriesInfo.Stroke,  
     
                        // Fill is not used, but we include it to prevent a Binding error from the
                        // overridden TooltipViewModel to the default TooltipModifier.TooltipContainerStyle which 
                        // expects a property of type Brush called Fill
                        Fill = Brushes.Transparent,
				    };

                    vm.OverThreshold = vm.YValue > HighThreshold;
                    vm.UnderThreshold = vm.YValue < LowThreshold;
                    return vm;
                };
            }
        }        
    }

    // Here we create a ViewModel for our ToolTip label. 
    // We assume you are using your own ViewModelBase
    public class TooltipViewModel : BaseViewModel
    {
        public double HighThreshold { get; set; }
        public double LowThreshold { get; set; }
        public double XValue { get; set;}
        public double YValue { get; set; }
        public string Title { get; set; }
        public string ThresholdText { get; set; }
        public bool OverThreshold { get; set; }
        public bool UnderThreshold { get; set; }
        public bool OverOrUnderThreshold  { get { return OverThreshold | UnderThreshold; }}
        public Color BackgroundColor { get; set; }
        public Color Stroke { get; set; }
        public Brush Fill { get; set; }
    }
}

// ThresholdBackgroundConverter.cs

// *************************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//  
// Web: http://www.scichart.com
//   Support: support@scichart.com
//   Sales:   sales@scichart.com
// 
// ThresholdBackgroundConverter.cs is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use. 
// 
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied. 
// *************************************************************************************
using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Media;

namespace SciChart.Examples.Examples.InspectDatapoints
{
    public class ThresholdBackgroundConverter : IValueConverter
    {
        public SolidColorBrush DefaultBrush { get; set; }
        public SolidColorBrush HighThresholdBrush { get; set; }
        public SolidColorBrush LowThresholdBrush { get; set; }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var vm = value as TooltipViewModel;
            if (vm == null) return null;

            var brush = DefaultBrush;

            if (vm.YValue > vm.HighThreshold) brush = HighThresholdBrush;
            if (vm.YValue < vm.LowThreshold) brush = LowThresholdBrush;

            var opacityStr = parameter as String;
            if (opacityStr != null)
            {
                double opacity;
                Double.TryParse(opacityStr, NumberStyles.Number, CultureInfo.InvariantCulture, out opacity);

                brush = brush.Clone();
                brush.Opacity = opacity;
            }

            return brush;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

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