How to customize the Tooltip in WPF SfChart?
Description
Tooltip in WPF SfChart offer a variety of customization options that help us to visualize the chart with more flexibility and information. Let’s address some of the most frequently asked questions regarding tooltip customizations.
- How to enable tooltip for chart
- How to apply template for tooltip
- How to format the text in the tooltip
- How to add an image in the tooltip
- How to add a chart inside tooltip
Default tooltip
Tooltip can be enabled by setting the ShowTooltip property of ChartSeries to true. By default, the tooltip displays the y-value of the hovered ChartSegment.
Code snippet
<chart:SfChart>
…
<chart:ColumnSeries XBindingPath="XValue"
YBindingPath="YValue"
ItemsSource="{Binding Data}"
ShowTooltip="True" >
</chart:ColumnSeries>
</chart:SfChart>Output
Applying template for tooltip
You can apply a custom tooltip template by setting the TooltipTemplate property of ChartSeries. The DataContext of the tooltip is the data item corresponding to the hovered ChartSegment.
Code snippet
<chart:ColumnSeries>
<chart:ColumnSeries.TooltipTemplate>
<DataTemplate>
<Border Background="White" Padding="4" BorderThickness="1" BorderBrush="Black">
<StackPanel Orientation="Vertical" >
<StackPanel Orientation="Horizontal">
<TextBlock Text="X Value: " />
<TextBlock Text="{Binding Item.XValue}" HorizontalAlignment="Right"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Y Value: " />
<TextBlock Text="{Binding Item.YValue}" HorizontalAlignment="Right"/>
</StackPanel>
</StackPanel>
</Border>
</DataTemplate>
</chart:ColumnSeries.TooltipTemplate>
</chart:ColumnSeries>Output
Formatting tooltip content
The tooltip content can be formatted by using string formatting on the text elements used in TooltipTemplate.
Code snippet
<chart:ColumnSeries.TooltipTemplate>
<DataTemplate>
<Border Background="White" Padding="4" BorderThickness="1" BorderBrush="Black">
<TextBlock Text="{Binding Path=Item.YValue, StringFormat='{}{0:c}'}"
HorizontalAlignment="Right"/>
</Border>
</DataTemplate>
</chart:ColumnSeries.TooltipTemplate>Output
Adding image for tooltip content
Image can be set to tooltip content by defining an Image element within the TooltipTemplate.
Code snippet
<chart:ColumnSeries.TooltipTemplate>
<DataTemplate >
<Border BorderBrush="Black" BorderThickness="1">
…
<Image Grid.RowSpan="2" Grid.Column="0" HorizontalAlignment="Left" Margin="3"
Source="{Binding Item.ImagePath}" ></Image>
</Border>
</DataTemplate>
</chart:ColumnSeries.TooltipTemplate>Output
Adding chart in tooltip content
You can embed another chart within a tooltip as tooltip content by defining an SfChart inside TooltipTemplate.
Code snippet
<chart:ColumnSeries.TooltipTemplate>
<DataTemplate>
<chart:SfChart AreaBorderThickness="0" Width="250" Height="150"
Background="White" BorderBrush="Black" BorderThickness="1" >
<chart:SfChart.Header>
<TextBlock Text="Reports in quarters" FontSize="15" FontWeight="Bold"
Margin="0,6,0,0"/>
</chart:SfChart.Header>
<chart:PieSeries XBindingPath="Month" YBindingPath="Sales"
ItemsSource="{Binding Item.InternalData}"
LabelPosition="OutsideExtended">
<chart:PieSeries.AdornmentsInfo>
<chart:ChartAdornmentInfo ShowLabel="True" ShowConnectorLine="True" />
</chart:PieSeries.AdornmentsInfo>
</chart:PieSeries>
</chart:SfChart>
</DataTemplate>
</chart:ColumnSeries.TooltipTemplate>Output
Conclusion
I hope you enjoyed learning about how to customize the tooltip in chart.
You can refer to our WPF Chart feature tour page to know about its other groundbreaking feature representations. You can also explore our WPF Chart documentation to understand how to create and manipulate data.
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