RadChart with Bar not Calling Item Style Delegate

[Jeremy]

I'm trying to style a stacked bar panel and running into some problems. The definition of the panel looks like this:

<Controls:RadChart
            x:Name="StatusChart"
            HorizontalAlignment="Stretch"
            HorizontalContentAlignment="Stretch"
            ItemsSource="{Binding StatusCounts}">
            <Controls:RadChart.DefaultView>
                <Charting:ChartDefaultView>
                    <Charting:ChartDefaultView.ChartLegend>
                        <Charting:ChartLegend Visibility="Collapsed"/>
                    </Charting:ChartDefaultView.ChartLegend>
                    <Charting:ChartDefaultView.ChartArea>
                        <Charting:ChartArea
                            EnableStripLinesAnimation="True"
                            EnableAnimations="True"
                            ItemWidthPercent="90"
                            HorizontalAlignment="Stretch"
                            HorizontalContentAlignment="Stretch"/>
                    </Charting:ChartDefaultView.ChartArea>
                </Charting:ChartDefaultView>
            </Controls:RadChart.DefaultView>
            <Controls:RadChart.SeriesMappings>
                <Charting:SeriesMapping>
                    <Charting:SeriesMapping.SeriesDefinition>
                        <Charting:Bar3DSeriesDefinition ShowItemLabels="True"/>
                    </Charting:SeriesMapping.SeriesDefinition>
                    <Charting:SeriesMapping.ItemMappings>
                        <Charting:ItemMapping FieldName="Count" DataPointMember="YValue"/>
                        <Charting:ItemMapping FieldName="StatusDescription" DataPointMember="XCategory"/>
                    </Charting:SeriesMapping.ItemMappings>
                </Charting:SeriesMapping>
            </Controls:RadChart.SeriesMappings>
        </Controls:RadChart>

The StatusCounts is a IEnumerable<T> where T is an object that has the Count and StatusDescription fields. In the code behind, I do this:

public StatusChartControl()
        {
            InitializeComponent();
            StatusChart.CreateItemStyleDelegate = CreateItemStyle;
        }

And then:

public Style CreateItemStyle(Control control, Style baseStyle, DataPoint dataPoint, DataSeries dataSeries)
{
    if (control is ChartLegendItem || dataPoint == null)
    {
        return baseStyle;
    }

    // Create a new style, do not use the one that is provided as parameter.
    var newStyle = new Style(baseStyle.TargetType) {BasedOn = baseStyle};

    var brush = ((StatusCount) dataPoint.DataItem).Region.AsBrush();

    if (control is BaseChartItem2D)
        newStyle.Setters.Add(new Setter(Shape.FillProperty, brush));

    if (control is SeriesItemLabel)
        newStyle.Setters.Add(new Setter(SeriesItemLabel.FillProperty, brush));

    return newStyle;
}

The problem is ... the create item style is never called! I set a breakpoint and it never fires. The chart is rendering fine, I see axis labels and lables on the items, etc, but I never get the create item style delegate to fire so I can colorize the data items. Help!

[Dwight]

Hello Jeremy,

The 3D chart does not support styling as this mechanism is available only for regular WPF/Silverlight controls (i.e. 2D scenarios).

We plan on refactoring the whole WPF/Silverlight 3D chart in order to bring it to parity with the 2D chart.

Best,
Joshua
the Telerik team

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