Bar chart is not using full height

[Erik]

Hello,

I have a small problem left on a bar chart. The 2D bar chart is working fine exept is is not using it's full height potentional.
(version Q2 2011)
See attached image.

XAML

<telerik:RadChart
    x:Name="xxxxxxxxxx"
    Margin="0,0,1,14"
    HorizontalAlignment="Left"
    HorizontalContentAlignment="Left"
    VerticalAlignment="Top"
    VerticalContentAlignment="Top"
    Width="165"
    BorderBrush="Black"
    Background="Black"
    Height="132">
    <telerik:RadChart.Resources>
        <Style x:Key="AxisXStyle" TargetType="TextBlock">
            <Setter Property="Foreground" Value="WhiteSmoke" />
            <Setter Property="FontSize" Value="9" />
            <Setter Property="Height" Value="15" />
            <Setter Property="VerticalAlignment" Value="Top" />
        </Style>
        <Style x:Key="AxisXLineStyle" TargetType="Line">
            <Setter Property="Stroke" Value="Silver" />
            <Setter Property="Margin" Value="0,6,0,0" />
        </Style>
        <Style x:Key="LegendItemStyle" TargetType="telerik:ChartLegendItem">
            <Setter Property="Foreground" Value="WhiteSmoke" />
            <Setter Property="FontSize" Value="8" />
            <Setter Property="MarkerShape" Value="Square" />
        </Style>
        <Style x:Key="TopItemLabelStyle" TargetType="telerik:SeriesItemLabel">
            <Setter Property="FontSize" Value="7" />
            <Setter Property="Foreground" Value="White" />
            <Setter Property="Fill" Value="Black" />
        </Style>
        <Style x:Key="TopItemLabelStyle_XX" TargetType="telerik:SeriesItemLabel">
            <Setter Property="FontSize" Value="7" />
            <Setter Property="Background" Value="Black" />
            <Setter Property="Foreground" Value="White" />
        </Style>
    </telerik:RadChart.Resources>
    <telerik:RadChart.DefaultSeriesDefinition>
        <telerik:BarSeriesDefinition>
        </telerik:BarSeriesDefinition>
    </telerik:RadChart.DefaultSeriesDefinition>
    <telerik:RadChart.AnimationSettings>
        <telerik:AnimationSettings  />
    </telerik:RadChart.AnimationSettings>
    <telerik:RadChart.DefaultView>
        <telerik:ChartDefaultView>
            <telerik:ChartDefaultView.ChartTitle>
                <telerik:ChartTitle Visibility="Collapsed" />
            </telerik:ChartDefaultView.ChartTitle>
            <telerik:ChartDefaultView.ChartArea>
                <telerik:ChartArea Padding="5,0,6,0" IsTabStop="False" SmartLabelsEnabled="True" >
                    <telerik:ChartArea.Annotations >
                        <telerik:MarkedZone Background="Black" />
                    </telerik:ChartArea.Annotations>
                    <telerik:ChartArea.AxisX>
                        <telerik:AxisX Visibility="Collapsed" />
                    </telerik:ChartArea.AxisX>
                    <telerik:ChartArea.AxisY>
                        <telerik:AxisY Visibility="Collapsed" />
                    </telerik:ChartArea.AxisY>
                </telerik:ChartArea>
            </telerik:ChartDefaultView.ChartArea>
            <telerik:ChartDefaultView.ChartLegend>
                <telerik:ChartLegend Visibility="Collapsed" />
            </telerik:ChartDefaultView.ChartLegend>
        </telerik:ChartDefaultView>
    </telerik:RadChart.DefaultView>
</telerik:RadChart>

VB code

Dim obj_Series As New SeriesMappingCollection

xxxxxxxxxx.SeriesMappings.Clear()
xxxxxxxxxx.ItemsSource = Nothing

For i = 0 To 4
    Dim sm1 As New SeriesMapping()
    Dim d1 As New StackedBarSeriesDefinition()

    d1.ShowItemToolTips = True
    d1.ItemToolTipFormat = "#Y.Volume{#.00}"
    d1.ShowItemLabels = (i = 4)
    If i = 4 Then
        d1.SeriesItemLabelStyle = TryCast(Me.xxxxxxxxxx.Resources("TopItemLabelStyle"), Style)
        d1.ItemLabelFormat = "#STSUM"
        d1.LabelSettings.LabelDisplayMode = LabelDisplayMode.Outside
        d1.LabelSettings.Distance = 10
        d1.LabelSettings.ShowConnectors = False
    End If
    sm1.SeriesDefinition = d1
    sm1.SeriesDefinition.Appearance.Fill = New SolidColorBrush(Utils.StringToColor(mobj_xxxxxx_Colors(i)))
    sm1.LegendLabel = String.Empty
    sm1.CollectionIndex = i
    Dim im1 As ItemMapping = New ItemMapping
    im1.DataPointMember = DataPointMember.YValue
    sm1.ItemMappings.Add(im1)
    obj_Series.Add(sm1)
Next
xxxxxxxxxx.SeriesMappings = obj_Series

How can I let the bar char use it's full height?

Regards,

Erik

[Ves]

Hi Erik,

The problem comes from the Y axis being collapsed initially. The axis uses an algorithm, which measures the available space to calculate its range and number of steps automatically. When it is collapsed the algorithm cannot be that precise (e.g. with data between 5 and 58 you may get a range of 0-100 with a step of 50, while knowing that there is enough space for 7 ticks you may get a refined range of 0-60 with a step of 10). So, please, leave the axis visible and hide it at a later stage or provide fixed values for min, max and step.

In addition, the axis is auto-extended by a single step. Please, find out how to disable this in the following help topic:

http://www.telerik.com/help/silverlight/radchart-features-axes-y-axis.html


Best regards,
Ves
the Telerik team

[Erik]

Thanks Ves,

That was the problem indeed. Hideing afterwards did not work (after rebinding a had a change) and gave the same result, but showing the Y-as and hiding the other ticks and stuff in de Y-as did the trick.

Erik.