Custom Tooltip in WPF Charting ScatterSeries - wpf

Question

I'm trying to set a custom tooltip using the WPF charting toolkit. Using the demonstration code from here. The code for the custom tooltip looks like this (sorry verbose):
<Grid>
<Grid.Resources>
<Style
x:Key="MyScatterDataPointStyle"
TargetType="chartingToolkit:ScatterDataPoint">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="chartingToolkit:ScatterDataPoint">
<Border
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Opacity="0"
x:Name="Root">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="MouseOverHighlight"
Storyboard.TargetProperty="Opacity"
To="0.6"
Duration="0"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Unselected"/>
<VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="SelectionHighlight"
Storyboard.TargetProperty="Opacity"
To="0.6"
Duration="0"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="RevealStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.5"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Shown">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="Root"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Hidden">
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="Root"
Storyboard.TargetProperty="Opacity"
To="0"
Duration="0"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid
Background="{TemplateBinding Background}">
<Rectangle>
<Rectangle.Fill>
<LinearGradientBrush>
<GradientStop
Color="#77ffffff"
Offset="0"/>
<GradientStop
Color="#00ffffff"
Offset="1"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Border
BorderBrush="#ccffffff"
BorderThickness="1">
<Border
BorderBrush="#77ffffff"
BorderThickness="1"/>
</Border>
<Rectangle x:Name="SelectionHighlight" Fill="Red" Opacity="0"/>
<Rectangle x:Name="MouseOverHighlight" Fill="White" Opacity="0"/>
</Grid>
<ToolTipService.ToolTip>
<StackPanel>
<ContentControl
Content="Custom ToolTip"
FontWeight="Bold"/>
<ContentControl
Content="{TemplateBinding FormattedDependentValue}"/>
</StackPanel>
</ToolTipService.ToolTip>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
The "Data" I'm binding to is a Dictionary, hence the DependentValuePath="Value.X" and IndependentValuePath="Value.Y".
My chart code looks like this:
<chartingToolkit:Chart Name="MyChart">
<chartingToolkit:Chart.Series>
<chartingToolkit:ScatterSeries
ItemsSource="{Binding Data}"
DependentValuePath="Value.X"
IndependentValuePath="Value.Y"
DataPointStyle="{StaticResource MyScatterDataPointStyle}">
<chartingToolkit:ScatterSeries.IndependentAxis>
<chartingToolkit:LinearAxis Name="XAxis" Title="Area Under ROC Curve" Orientation="X" Minimum="0" />
</chartingToolkit:ScatterSeries.IndependentAxis>
<chartingToolkit:ScatterSeries.DependentRangeAxis>
<chartingToolkit:LinearAxis Name="YAxis" Title="Calibration Error" Orientation="Y" Minimum="0" />
</chartingToolkit:ScatterSeries.DependentRangeAxis>
</chartingToolkit:ScatterSeries>
</chartingToolkit:Chart.Series>
</chartingToolkit:Chart>
I would like the tooltip to be of the form String.Format("{0}: {1}, {2}", Key, Value.X, Value.Y); (i.e the key followed the value). Any idea how to do this? Currently the tooltip just shows the dependent value.

Answer 1

I think this question has the answer you are looking for
WPF toolkit charting : Customize datapoint label
Basically you want to add more entries to your ToolTipService.ToolTip declaration
<ToolTipService.ToolTip>
<StackPanel>
<ContentControl
Content="Custom ToolTip"
FontWeight="Bold"/>
<ContentControl
Content="{TemplateBinding Key}"/><!--I am not sure what the correct property will be Key is a guess-->
<ContentControl
Content="{TemplateBinding IndependentValue}"/>
<ContentControl
Content="{TemplateBinding DependentValue}"/>
</StackPanel>
</ToolTipService.ToolTip>