Get opacity of layers in Legend control

MiriEshel

Hi everybody,

I'm using a legend that looks like this:
                           

<esri:Legend x:Name="Legend"
                                         LayerIDs="USAID_Layers"
                                         LayerItemsMode="Tree"
                                         Map="{Binding ElementName=Map}"
                                         Refreshed="Legend_Refreshed"
                                         ShowOnlyVisibleLayers="True">
                                <esri:Legend.LegendItemTemplate>
                                    <DataTemplate>
                                        <StackPanel Margin="0,-3" Orientation="Horizontal">
                                            <Image MinWidth="20"
                                                   Margin="0,-1"
                                                   HorizontalAlignment="Center"
                                                   VerticalAlignment="Center"
                                                   Source="{Binding ImageSource}"
                                                   Stretch="None" />
                                            <TextBlock MinWidth="80"
                                                       Margin="5,0"
                                                       VerticalAlignment="Center"
                                                       Text="{Binding Label}" />
                                        </StackPanel>
                                    </DataTemplate>
                                </esri:Legend.LegendItemTemplate>
                            </esri:Legend>

One of the layer has opacity (defined in the mxd).
This layer looks good on the map (the brown and yellow polygons) but it is solid (has no opacity) in the legend.
See attached files.

Is there any binding that I can do in order to get the opacity of the layer from the mxd?

Thanks a lot.
Miri

transparent.jpg

solid.jpg

Parth_patel_0-1748687678811.png

cja_1-1748645641878.png

Anonymous User

Original User: dbroux

You can redefine the LegendItemTemplate of the legend and bind the swatch opacity to the layer opacity.Something like:

<esri:Legend.LegendItemTemplate>
    <DataTemplate>
        <StackPanel Orientation="Horizontal">
            <Image MinWidth="20" HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                      Opacity="{Binding Path=DataContext.Layer.Opacity,
                                        RelativeSource={RelativeSource AncestorType=esriToolkitPrimitives:TreeViewItemExtended,
                                                                    AncestorLevel=2}}" 
                     Source="{Binding ImageSource}"
                    Stretch="None" />
            <TextBlock Margin="5,0,0,0" VerticalAlignment="Center" Text="{Binding Label}" />
        </StackPanel>
    </DataTemplate>
</esri:Legend.LegendItemTemplate>