Colouring a hierarchical XamDataGrid - wpf

Question

I'm using a XamDataGrid (Infragistics-control) to display some hierarchical data. The objects that I can have up to 10 levels and I need to be able to give each level a specific background-color. I use the AssigningFieldLayoutToItem-event to get the "level" of the item and it would be best to assign the background/style here as well, I suppose.
I have tried specifying a DataRecordCellArea-style and even a CellValuePresenter-style but I can't get any of these to work with the FieldLayouts.
Another solution is to write a FieldLayout for each level, but this would create a lot of unnecessary XAML-code.
Any suggestions as to what I should do?

Answer 1

If you have a different FieldLayout for each level, you could use a single style targeting the DataRecordPresenter with a converter to set the background.
XAML:
<local:BackgroundConverter x:Key="BackgroundConverter"/>
<Style TargetType="{x:Type igDP:DataRecordPresenter}">
<Setter Property="Background" Value="{Binding RelativeSource={RelativeSource Self}, Path=FieldLayout.Key, Converter={StaticResource BackgroundConverter}}"/>
</Style>
Converter:
public class BackgroundConverter:IValueConverter
{
public BackgroundConverter()
{
this.Brushes = new Dictionary<string, Brush>();
}
public Dictionary<string, Brush> Brushes {get;set;}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is string)
{
string key = value.ToString();
if (this.Brushes.ContainsKey(key))
return this.Brushes[value.ToString()];
}
return Binding.DoNothing;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
The following will set the colors to use for fields with Key1 and Key2:
BackgroundConverter backgroundConverter = this.Resources["BackgroundConverter"] as BackgroundConverter;
backgroundConverter.Brushes.Add("Key1", Brushes.Green);
backgroundConverter.Brushes.Add("Key2", Brushes.Yellow);
If you are reusing the same FieldLayout for multiple fields, then you could use the InitializeRecord event and change the style to bind to the Tag of the DataRecord like this:
XAML:
<Style TargetType="{x:Type igDP:DataRecordPresenter}">
<Setter Property="Background" Value="{Binding RelativeSource={RelativeSource Self}, Path=Record.Tag}"/>
</Style>
C#:
void XamDataGrid1_InitializeRecord(object sender, Infragistics.Windows.DataPresenter.Events.InitializeRecordEventArgs e)
{
if (!e.ReInitialize)
{
// Set the tag to the desired brush.
e.Record.Tag = Brushes.Blue;
}
}
Note that I didn't add the conditional logic for determining the brush to use and that still needs to be done for different levels to have different backgrounds.