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Hello
I’m working on a WPF app. Everything is OK except that I don’t understand how to render the series above the annotations.
The XAML code is the following:

<s:SciChartSurface Name="sciChartSurface"
                   s:ThemeManager.Theme="SciChartv4Dark"
                   Annotations="{Binding Path=Annotations}"
                   ChartTitle="{Binding Path=GraphTitle}"
                   DataContext="{Binding Path=ChartViewModel,
                   RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type charts:ChartView}}}"
                   FocusVisualStyle="{x:Null}"
                   Focusable="True"
                   SeriesSource="{Binding Path=Series}"
                   Padding="0 5 8 0">

    <s:SciChartSurface.RenderSurface>
        <s:HighQualityRenderSurface/>
    </s:SciChartSurface.RenderSurface>
    <s:SciChartSurface.ChartModifier>
        <s:ModifierGroup>


         [...]



        </s:ModifierGroup>
    </s:SciChartSurface.ChartModifier>

    <!--  Create an X Axis  -->
    <s:SciChartSurface.XAxis>
        <s:NumericAxis AutoRange="{Binding Path=XAxis.AutoScaling,
                                           Converter={StaticResource BooleanToAutoRangeConverter}}"
                       AxisTitle="{Binding Path=XAxis.AxisTitle}"
                       DrawMajorGridLines="{Binding Path=XAxis.ShowGridLines}"
                       DrawMinorGridLines="False"
                       DrawMinorTicks="True"
                       GrowBy="0, 0.1"
                       AxisBandsFill="#1c1c1e" 
                       VisibleRange="{Binding Path=XAxis.AxisRange,
                                              Mode=TwoWay}"
                       MajorDelta="{Binding XAxis.MajorDelta, Mode=TwoWay}"
                       MinorDelta="{Binding XAxis.MinorDelta, Mode=TwoWay}"
                       AutoTicks="{Binding XAxis.AutoTicks}" 
                       />
    </s:SciChartSurface.XAxis>

    <!--  Create a Y Axis  -->
    <s:SciChartSurface.YAxis>
        <s:NumericAxis AutoRange="{Binding Path=YAxis.AutoScaling,
                                           Converter={StaticResource BooleanToAutoRangeConverter}}"
                       AxisAlignment="Left"
                       AxisTitle="{Binding Path=YAxis.AxisTitle}"
                       DrawMajorGridLines="{Binding Path=YAxis.ShowGridLines}"
                       DrawMinorGridLines="False"
                       DrawMinorTicks="True"
                       GrowBy="0.1, 0.1"
                       IsPrimaryAxis="True"
                       AxisBandsFill="#1c1c1e" 
                       VisibleRange="{Binding Path=YAxis.AxisRange,
                                              Mode=TwoWay}"
                       MajorDelta="{Binding YAxis.MajorDelta, Mode=TwoWay}"
                       MinorDelta="{Binding YAxis.MinorDelta, Mode=TwoWay}"
                       AutoTicks="{Binding YAxis.AutoTicks}"
                       />
    </s:SciChartSurface.YAxis>
</s:SciChartSurface>

Edit: this is the code that creates the horizontal annotation:

 /// <summary>
    /// Creates a chart annotation
    /// </summary>
    /// <param name="a"></param>
    /// <returns></returns>
    private AnnotationBase CreateChartAnnotation(Annotation a)
    {
        HorizontalLineAnnotation annotation;

        //not used??
        //ColorToBrushConverter brushConverter = new ColorToBrushConverter();

        annotation = new HorizontalLineAnnotation() { Y1 = a.ThresholdValue.Value };
        annotation.Stroke = new SolidColorBrush((Color)ColorConverter.ConvertFromString(a.Stroke));
        annotation.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch;
        annotation.IsEditable = false;
        annotation.LabelTextFormatting = string.Format("{0} 0.0", a.Label);
        annotation.StrokeThickness = 2;
        annotation.LabelPlacement = LabelPlacement.Axis;
        annotation.ShowLabel = a.ShowLabel;
        if (a.DashArray != null)
        {
            annotation.StrokeDashArray = new DoubleCollection(a.DashArray);
        }


        return annotation;
    }

I tried to set AnnotationCanvas.BelowChart but the behaviour is very strange: the horizontal annotation line is no more continuous
I attached two jpegs

Regards
Gianpaolo

0 votes
2k views

Hi there,

I’m having an issue showing selected points on top of all other series.

I have created a polygon selector chart modifier based on the following knowledge article: http://support.scichart.com/index.php?/Knowledgebase/Article/View/17237/32/custom-chartmodifiers—part-3—custom-select-and-drag-a-series

Specifically, the issue that I’m having is that when the user does the polygon selection if the last point of the polygon is on one of the other series, the series shows above the selected points.

http://support.scichart.com/index.php?/Knowledgebase/Article/View/17180/28/changing-z-order-of-renderableseries

I have tried to set IsSelected = true (from above link), but that doesn’t seem to work. Is there another way of doing it? Or am I doing it at the wrong place? I have tried to set the IsSelected = true right before and right after I add the selected point series to the surface.

I have added two images, the first is how the points are currently drawing, and the second of how it should look every time.

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