have TemplateColumn sort/filterable

[VisualAlf]

Sometimes I have a request to mark a certain cell in some way. (For example show an overdue invoice date as red.) This seems not possible with the standard TableViewTextColumn, since we have no access to the underlying TextBlock/TextBox.

So the only way I see, is using the TableViewTemplateColumn for this purpose. (which works)

But the Template-Column can't be sorted or filtered.

I don't know why this is so. But it seems really easy to implement anyway.
I succeeded with making a TableViewTemplateColumnEX as a copy of TableViewTemplateColumn, but inherited from TableViewBoundColumn instead of TableViewColumn . Then I could write:

               <tv:TableViewTemplateColumnEX Header=... Width= ... Binding="{Binding PROP}">
                    <tv:TableViewTemplateColumnEX.CellTemplate>
                        <DataTemplate x:DataType="local:Item">
                            <TextBlock Text="{x:Bind PROP, Mode=OneWay}" 
                                       Foreground="{x:Bind hlp:Utils.GetForeground(State)}" />
                        </DataTemplate>
                    </tv:TableViewTemplateColumnEX.CellTemplate>
                </tv:TableViewTemplateColumnEX>

IMHO, having TemplateColumn sortable/filterable, should be default. We can always opt out by CanSort=False.
Also, getting rid of TableViewBoundColumn may simplify the code.

[AlexanderBlackman]

I second the need for this.