In the ESRI Legend Control, "DataTemplate" can be used to display slider "usercontrol" to control the opacity of the Layer.
Here is the XAML content where the slider "usercontrol" is used.
<esri:Legend Grid.Row="1" x:Name="legendControl" VerticalAlignment="Top" LayerItemsMode="Tree"
ShowOnlyVisibleLayers="False" Margin="5,5,5,5" ><esri:Legend.MapLayerTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<CheckBox Content="{Binding Label}"
IsChecked="{Binding IsEnabled, Mode=TwoWay}"
IsEnabled="{Binding IsInScaleRange}" >
</CheckBox>
<Slider Maximum="1" Value="{Binding Layer.Opacity, Mode=TwoWay}" Width="50" Loaded="Slider_Loaded" Tag="{Binding Layer}" />
</StackPanel>
</DataTemplate>
</esri:Legend.MapLayerTemplate>
<esri:Legend.LayerTemplate>
<DataTemplate>
<CheckBox Content="{Binding Label}"
IsChecked="{Binding IsEnabled, Mode=TwoWay}"
IsEnabled="{Binding IsInScaleRange}" >
</CheckBox>
</DataTemplate>
</esri:Legend.LayerTemplate>
</esri:Legend>
But what happens, if the user should see Slider usercontrol only for certain Layers and for certain Layers it should NOT be shown ?
There are many ways to do this. But here is one simple method.
In the Slider "usercontrol" add the following event and tag in the XAML content.
Loaded="Slider_Loaded" Tag="{Binding Layer}"
In the code behind simply use some logic like this.
private void Slider_Loaded(object sender, RoutedEventArgs e)
{Slider slider = sender as Slider;
Layer layer = slider.Tag as Layer;
if (layer.ID == "SampleData") slider.Visibility = System.Windows.Visibility.Collapsed;
}
If the "Layer.ID" matches with that "specific layer name", then the slider will not be displayed.
Hope this helps !
Have fun coding :)
Cheers
Adam
