Ufdjrw

As of now, i assign the image of a TreeView item using a direct binding to the image's source:

<DataTemplate DataType="x:Type local:GeoPoint">
 <StackPanel Orientation="Horizontal">
 <Image Source="Binding Color" Height="32" />
 <TextBlock Text="Binding Name" VerticalAlignment="Center"/>
 </StackPanel>
</DataTemplate>

the Color binding is referring to string containing the path to the PNG, something like "/Resources/red.png"

i would like to make the Color variable of custom type "MarkerColor", an enum containing several colors, and have the image source binding reference this value, so that if

Color = MarkerColor.green; the binding would reference "/Resources/green.png"

Note that the name of the PNG is not necessarily the same as the name of MarkerColor, an "adapter" should be used to convert the type

I know how to do this in Java Android SDK, but not really sure on how to achive this in Wpf

You could create a converter that knows how to convert the enumeration value to a valid resource:

public class ColorResourceConverter : IValueConverter

 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
 
 MarkerColor color = (MarkerColor)value;
 Uri uri;
 switch(color)
 
 case MarkerColor.Green:
 uri = new Uri("Resources/green.png");
 break;
 case MarkerColor.Red:
 uri = new Uri("Resources/red.png");
 break;
 //...
 default:
 uri = new Uri("Resources/default.png");
 break;
 

 return new BitmapImage(uri);
 

 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
 
 throw new NotSupportedException();
 

Usage:

<DataTemplate DataType="x:Type local:GeoPoint">
 <DataTemplate.Resources>
 <local:ColorResourceConverter x:Key="ColorResourceConverter" />
 </DataTemplate.Resources>
 <StackPanel Orientation="Horizontal">
 <Image Source="Binding Color, Converter=StaticResource ColorResourceConverter" Height="32" />
 <TextBlock Text="Binding Name" VerticalAlignment="Center"/>
 </StackPanel>
</DataTemplate>