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0 votes
362 views

Hi,
I’m experimenting with the LegendModifier and want to control which RenderableSeries are shown via the “LegendItemTemplate” approach. The idea is to add a specific tagging class to the RenderableSeries.DataSeries.Tag and use the content inside the LegendItemTemplate which I define in the Window.Resouces.

The tagging Class:

public class DataSeriesTag
{
    public string LegendText { get; set; }
    public bool ShowLegend { get; set; }
}

The LegendItemTemplate:
<Window.Resources>


<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

            <!--<CheckBox Width="16" Margin="5,0,0,0"
                HorizontalAlignment="Left"
                VerticalAlignment="Center"
                IsChecked="{Binding RenderableSeries.IsVisible, Mode=TwoWay}"
                Visibility="{Binding RenderableSeries.DataSeries.Tag.ShowLegend, Converter={dxmvvm:BooleanToVisibilityConverter}}" />-->

            <s:PointMarker Grid.Column="1" Margin="5,0,0,0" Width="40" Height="10" VerticalAlignment="Center" HorizontalAlignment="Center"
              DataContext="{Binding RenderableSeries}"
              DeferredContent="{Binding LegendMarkerTemplate}"
              Visibility="{Binding ShowSeriesMarkers, RelativeSource={RelativeSource AncestorType=s:SciChartLegend}, Converter={dxmvvm:BooleanToVisibilityConverter}}" />

            <TextBlock Margin="5,0,5,0"
     Grid.Column="2"
     HorizontalAlignment="Left"
     Text="{Binding RenderableSeries.DataSeries.Tag.LegendText}" />

        </Grid>
    </DataTemplate>
</Window.Resources>

As long as I declare the SciChartSurface.ChartModifier in XAML, it works perfect.
The proplem raises when I bind the ModifierGroup to a ViewModel Property and try to build the LegendModifier there. How can I assign the LegendItemTemplate in the ViewModel?:

legendModifier = new LegendModifier(){
            ShowLegend = true,
            ShowVisibilityCheckboxes = false,
            LegendItemTemplate = ??????
        };
        TheModifiers.ChildModifiers.Add(legendModifier);

Kind regards
Martin

0 votes
842 views

I am creating point data series using SCIXyScatterRenderableSeries.
I need to tap on specific data points and display pop over or some view on top of it. Pop over provides information regarding that point.

How can I implement that in iOS.

0 votes
0 answers
2k views

Hi,

I’m trying to enable the use of multiple VerticalLineAnnotations and show the corresponding SeriesInfo in an extra legend to the user. Utilizing the RolloverModifier Tooltips example, this works quite easily for the position and values of the VerticalLineAnnotations. However, I would like to show differences (X and Y) between the values of two VerticalLineAnnotations in the same manner.

My approach was to subclass ChartDataObject and add an ObservableCollection of a custom class (SeriesDifferenceInfo) providing properties, which exhibit DeltaX and DeltaY for binding in the surface. For keeping this collection up to date when adding or removing a VerticalLineAnnotation, I registered for the CollectionChanged event of SeriesInfo in my subclassed ChartDataObject and wanted to update the Collection of SeriesDifferenceInfo subsequently. But somehow this event appears not to be triggered on a change in the list of SeriesInfo. Am I doing something wrong or is this intended behaviour? Of course, I could simply call a method UpdateDifferenceCollection(), when adding/removing a VerticalLineAnnotation, but is this really neccessary?

Also, the next problem is triggering PropertyChanged for the DeltaX and DeltaY values when the values of one SeriesInfo changed. I guess this could be done by listening to e.g. a drag event of VerticalLineAnnotation, but is there a more straightforward way to do this?

Best regards
Phil

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