I am trying to place an element vertically relative to a calculated item value. Just think of a horizontal level list where each item is vertically placed in a different position.

I have it working in WPF but unfortunately it doesn't work in NoesisGUI. The problem seems to be the binding of the RowGridDefinition to the GridLength property of the item. Apparently it's ignored completely.

I've also tried giving the (for the calculation) required height (so I could actually rid of the percentage) to the bound item but the property's setter is never called.

I'll now try a MultiValueConverter even if I don't know whether they're already supported by NoesisGUI.

Following the DataTemplate I've used:

[code]
<DataTemplate x:Key="LevelTemplate">
<Border x:Name="Border" Width="{Binding ActualWidth, ElementName=MainPanel, Converter={StaticResource MultiplyConverter}, ConverterParameter=0.2}"
Height="{Binding ActualHeight, ElementName=MainPanel, Converter={StaticResource MultiplyConverter}, ConverterParameter=0.45}">
<Grid>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="{Binding ActualHeight, ElementName=LevelItemGrid}" />
</Grid.RowDefinitions>

                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="{Binding Row1, Mode=OneWay}" />
                                <RowDefinition Height="{Binding Row2, Mode=OneWay}" />
                            </Grid.RowDefinitions>

                            <Border x:Name="Decorator" BorderBrush="Black" BorderThickness="1" />
                        </Grid>
                    </Grid>

                    <Grid x:Name="LevelItemGrid" VerticalAlignment="Top" Height="{Binding ActualHeight, ElementName=BackButton, Converter={StaticResource MultiplyConverter}, ConverterParameter=1.5}">
                        <Grid.RenderTransform>
                            <TranslateTransform Y="{Binding ActualHeight, ElementName=Decorator}" />
                        </Grid.RenderTransform>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="60*" />
                            <RowDefinition Height="20*" />
                            <RowDefinition Height="20*" />
                        </Grid.RowDefinitions>

                        <Button x:Name="Button" Grid.Row="0" Grid.RowSpan="2" IsEnabled="{Binding IsPlayable}" Style="{DynamicResource CircleButtonStyle}"
                            Command="{Binding DataContext.PlayLevelCommand, RelativeSource={RelativeSource AncestorType=ItemsControl}}" CommandParameter="{Binding .}">
                            <TextBlock Text="{Binding Name}" noesis:Text.Stroke="{DynamicResource TextStrokeBrush}" noesis:Text.StrokeThickness="{DynamicResource TextStrokeThickness}" />
                        </Button>

                        <prot:ImageViewbox Grid.Row="1" Grid.RowSpan="2" ImageBrush="{Binding Medal, Converter={StaticResource ImageKeyToImageBrushConverter}, ConverterParameter=Icons_Star_}" />
                    </Grid>
                </Grid>
            </Border>
            <DataTemplate.Triggers>
                <DataTrigger Binding="{Binding IsPlayable}" Value="False">
                    <Setter TargetName="Button" Property="BorderBrush" Value="{DynamicResource ButtonOuterStrokeDisabledBrush}" />
                </DataTrigger>
                <DataTrigger Binding="{Binding IsLastPlayed}" Value="True">
                    <Setter TargetName="Button" Property="BorderBrush" Value="{DynamicResource ButtonOuterStrokeHighlightedBrush}" />
                </DataTrigger>
            </DataTemplate.Triggers>
        </DataTemplate>

[/code]