Triggers inside PointSeries DefaultVisualStyle for accessing DataPoint.IsSelected

[Sivakumar]

I am trying set selected point color using triggers.But it is not working.Is there anyway to access to IsSelected property ?

Or Do we need to go for point template(Working here)?

<telerik:PointSeries.DefaultVisualStyle>
    <Style TargetType="Path">
          <Setter Property="Fill" Value="YellowGreen"/>
          <Setter Property="Stroke" Value="Red"/>
          <Setter Property="StrokeThickness" Value="1"/>
     <Style.Triggers>
                    <DataTrigger Binding="{Binding DataPoint.IsSelected}" Value="True">
                        <Setter Property="Fill" Value="Red" />
                    </DataTrigger>

                </Style.Triggers>
    </Style>
</telerik:PointSeries.DefaultVisualStyle>

[Sivakumar]

One more issue i am facing one same above,I am trying to set Fill value of Point based on conditions but it is not working as well .My model has IsPass property.

 <Style x:Key="PointSeriesStyle" TargetType="telerik:PointSeries">
                <Setter Property="ShowLabels" Value="True" />
                <Setter Property="CategoryBinding" Value="Vector" />
                <Setter Property="ValueBinding" Value="ValueForDisplay1" />
                <!--<Setter Property="DefaultVisualStyle" Value="{StaticResource PointTempalteStyle}" />-->
                <Setter Property="DefaultVisualStyle">
                    <Setter.Value>
                        <Style TargetType="Path">
                            <Setter Property="Fill" Value="Yellow"/>
                            <Setter Property="Stroke" Value="Transparent"/>
                            <Setter Property="StrokeThickness" Value="0"/>
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding DataItem.IsPass}" Value="False">
                                    <Setter Property="Fill" Value="Red" />
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </Setter.Value>
                </Setter>

[Martin Ivanov]

Hi Sivakumar,

The trigger doesn't work because it cannot find the path to the IsPass and IsSelected properties. In order to access the data point model in the DefaultVisualStyle you will need to use the Path element Tag property. 

<telerik:PointSeries.DefaultVisualStyle>
    <Style TargetType="Path">
        <Style.Triggers>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Tag.DataItem.IsSelected}" Value="True">
                <Setter Property="Fill" Value="Red" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</telerik:PointSeries.DefaultVisualStyle>

Basically, this binding says - get the Path element (self), then get its Tag property which contains the DataPoint model. After this, get the DataPoint's DataItem property which is the view model and get its IsSelected property.

Regards,
Martin
Telerik