[SOLVED] Binding in Silverlight.ToolKit.DataVisualization Datapoint Tooltip

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I'm using the DataVisualization namespace in the Silverlight Toolkit. I'm trying to figure out how to create a custom tooltip. I've overridden the datapoint template, and I know where to do what I want to do, but not exactly how to go about doing it.

Essentially, I want to show the series title, the FormattedIndependentValue (X-Axis label for the datapoint), and the datapoint value. The only thing I don't know how to get to is the series title.

The part of the template that matters is here:

<ToolTipService.ToolTip>
    <StackPanel>
 
        <ContentControl Content="{Binding ????????}" />
 
        <ContentControl Content="{TemplateBinding FormattedIndependentValue}" />
        <ContentControl Content="{Binding Value, Converter={StaticResource DataValueConverter}}" />
    </StackPanel>
</ToolTipService.ToolTip>

My question is what to bind to for the ContentControl shown by the "???????"?

The chart contains a collection of Series, each of which contains a collection of datapoints. The datapoint template contains the tooltip XAML shown above.

The property I'm after is mainChart.Series[n].Title. How do I get there?

Posted 16-Feb-11 9:32am

#realJSOP

Updated 22-Feb-11 2:10am

v6

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#realJSOP · Accepted Answer · 2011-02-22T02:11:00

01/17/2011 08:00 (SOLUTION)
===========================================================================
ATTENTION! Please do not delete this as I am testing Codeproject site
functionality regarding posting solutions to your own questions. Many
thanks.
===========================================================================

Well, I haven't been able to find anything that will let me do it that way, so I added a property to the DataPointSeries items called ParentChartSeries, and after the series is created, I call a method in my page that sets this property, like so:

C#

foreach (DBSeriesDataItem item in series.ItemsSource)
{
   item.ParentChartSeries = series;
}

After that, I could do this in the XAML:

<ContentControl Content="{Binding ParentChartSeries, Converter={StaticResource TooltipTitleConverter}}" />

Here's the TooltipTitleConverter defined in the XAML:

<local:BudgetPanelBase.Resources>
    <local:TooltipTitleConverter x:Key="TooltipTitleConverter" />
</local:BudgetPanelBase.Resources>

And finally, the code for the converter:

C#

public class TooltipTitleConverter : IValueConverter
{
//-------------------------------------------------------------------------
public object Convert(Object value, System.Type targetType, Object parameter, System.Globalization.CultureInfo culture)
{
    Label label = null;
    if (value != null)
    {
        MSChart.DataPointSeries series = value as MSChart.DataPointSeries;
        label = new Label();
        label.Content = series.Title;
    }
    return obj;
}
 
//-------------------------------------------------------------------------
public object ConvertBack(Object value, System.Type targetType, Object parameter, System.Globalization.CultureInfo culture)
{
    return value;
}