Hi,

In my grid I've defined three XamGrid GroupColumns, each containing an arbitrary set of TextColumns.  I want GroupColumn 1 to have 'star' width, GroupColumn 2 to have a fixed pixel width, and GroupColumn 3 to have 'star' width also.  These three GroupColumns must always span the full width of the host window.  Within each GroupColumn I want the text columns to autofit to fill the available space.   Here's my attempt to achieve this:

<ig:XamGrid ItemsSource="{Binding OptionsView}"
                    AutoGenerateColumns="False"
                    IsAlternateRowsEnabled="True">
    <ig:XamGrid.Columns>
        <ig:GroupColumn Key="Call"
                                Width="1*">
            <ig:GroupColumn.Columns>
                <ig:TextColumn Key="C_Bid"
                                       HeaderText="Bid"/>
                <ig:TextColumn Key="C_Ask"
                                       HeaderText="Ask" />
            </ig:GroupColumn.Columns>
        </ig:GroupColumn>

        <ig:GroupColumn Key="StrikeGrp"
                                HeaderText="Strike"
                                Width="150">
            <ig:GroupColumn.Columns>
                <ig:TextColumn Key="Strike"
                                       Width="150" />
            </ig:GroupColumn.Columns>
        </ig:GroupColumn>

        <ig:GroupColumn Key="Put"
                                Width="1*">
            <ig:GroupColumn.Columns>
                <ig:TextColumn Key="P_Bid"
                                       HeaderText="Bid"/>
                <ig:TextColumn Key="P_Ask"
                                       HeaderText="Ask" />
            </ig:GroupColumn.Columns>
        </ig:GroupColumn>

    </ig:XamGrid.Columns>
</ig:XamGrid>

Unfortunately, setting a GroupColumn's Width property has no discernable effect on the layout.  Can someone tell me how I can achieve the above objective?

Many thanks,
James