Databinding to enumeration of a static class - wpf

Question

Chaps,
I have a datagrid and am colouring the rows as follows.
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridCell}" >
<Style.Triggers>
<Trigger Property="DataGridCell.IsSelected" Value="True">
<Setter Property="Foreground" Value="Blue" />
<Setter Property="Background" Value="White" />
</Trigger>
<DataTrigger Binding="{Binding ErrorType}" Value="TerminalError">
<Setter Property ="Foreground" Value="Purple"/>
</DataTrigger>
<DataTrigger Binding="{Binding ErrorType}" Value="CriticalError">
<Setter Property ="Foreground" Value="Red"/>
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
Currently the colours are hard-coded and I need to change this. I have a singleton class that holds colours for different states and colours may be accessed in the following way:
Color returnedColour = ColourSchemes.Instance.GetColour (CriticalError)
So in the xaml, where I have Value="Red" etc, I wish to source the name from the globally accessible ColourSchemes object instead. Would very much appreciate any words of wisdom.

Answer 1

At first, make sure to use Brush instead of Color what you assign a value to a property like Foreground or Background.
Then you may add an indexer property to your ColourSchemes class, which takes the enum value as key:
public enum ErrorType
{
TerminalError, CriticalError
}
public class ColourSchemes
{
private readonly Dictionary<ErrorType, Brush> brushes =
new Dictionary<ErrorType, Brush>
{
{ ErrorType.TerminalError, Brushes.Orange },
{ ErrorType.CriticalError, Brushes.Red }
};
public Brush this[ErrorType value]
{
get { return brushes[value]; }
}
public static ColourSchemes Instance { get; } = new ColourSchemes();
}
Now you may bind a property like this:
Background="{Binding Source={x:Static local:ColourSchemes.Instance}, Path=[CriticalError]}">
Or in a Setter:
<Setter Property="Background"
Value="{Binding Source={x:Static local:ColourSchemes.Instance}, Path=[CriticalError]}"/>
You may however want to take a look at Dynamic Resources.