Simulating a PointSeries

[Peter Chapman]

Hi Telerik,

I'm glad to see you're including a point series in your next release. At the moment I'm simulating a point series by styling a LineSeries, and making the stroke transparent. I then use a PointTemplate to make the point, as below.

My question is how can I bind the fill brush of the ellipse I'm using to the palette colour for the series?

thanks

 <Style x:Key="LineSeriesAsPointsStyle" TargetType="{x:Type telerik:LineSeries}">
    <Setter Property="StrokeShapeStyle">
    <Setter.Value>
    <Style TargetType="{x:Type Path}">
    <Setter Property="Stroke" Value="#00000000"/>
    <Setter Property="StrokeThickness" Value="0"/>
    </Style>
    </Setter.Value>
    </Setter>
<Setter Property="PointTemplate">
<Setter.Value>
<DataTemplate>
<Ellipse Height="7" Width="7" Fill="Red" /><!-- here is the problem -->
</DataTemplate>
</Setter.Value>
</Setter>
    </Style>

[Petar Kirov]

Hi Peter,

The workaround with releases before Q2 2013 is to bind the Fill/Background of you PointTemplate and use a converter like this:

<DataTemplate>
   <Ellipse Height="7" Width="7"
        Fill="{Binding Converter={StaticResource PaletteConveter}}" />
</DataTemplate>

public class PaletteConveter : IValueConverter

{

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

    {

        var dp = value as DataPoint;

 

        var series = (dp.Presenter as CartesianSeries);

 

        var chart = series.ParentOfType<RadCartesianChart>();

 

        var palette = chart.Palette;

 

        int seriesIndex = chart.Series.IndexOf(series);

        int paletteColorsCount = palette.GlobalEntries.Count;

 

        var brush =
        palette.GlobalEntries[seriesIndex % paletteColorsCount].Fill;

 

        return brush;

}

 

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

    {

        throw new NotImplementedException();

    }

}

Actually, you can try the Q2 2013 Beta release which was released last week if you want to used PointSeries out-of-the-box.

You need to go to your account -> Products & Subscriptions -> RadControls for WPF -> Download Installer and other resources -> and at the bottom of list you should be able to find the files for Beta release.

Let me know if I can assist you further.

Regards,
Petar Kirov
Telerik