How to center labels in RadPivotMap

Environment

Product RadPivotMap for WPF

Description

How to center the labels for RadTreeMapItems without children.

Solution

Extract and edit the RadTreeMapItem ControlTemplate and update the position of the element with x:Name="ContentPresenter" when the RadTreeMapItem does not have any children. Example 1 demonstrates this approach by adding a DataTrigger inside the ControlTemplate.

Example 1: Modifying the RadTreeMapItem ControlTemplate in the Office_Black theme

<!-- If you are using the NoXaml dlls, you should add the BasedOn attribute: BasedOn="{StaticResource RadTreeMapItemStyle}"--> 
<Style TargetType="telerik:RadTreeMapItem" > 
    <Setter Property="Template"> 
        <Setter.Value> 
            <ControlTemplate TargetType="telerik:RadTreeMapItem"> 
                <Grid> 
                    <VisualStateManager.VisualStateGroups> 
                        <VisualStateGroup x:Name="CommonStates"> 
                            <VisualState x:Name="Normal"/> 
                            <VisualState x:Name="MouseOver"> 
                                <Storyboard> 
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="MouseOverVisual" Storyboard.TargetProperty="BorderBrush" Duration="0.00:00:00.05"> 
                                        <DiscreteObjectKeyFrame KeyTime="0.00:00:00.0"> 
                                            <DiscreteObjectKeyFrame.Value> 
                                                <LinearGradientBrush StartPoint="0,0" EndPoint="3,3" MappingMode="Absolute" SpreadMethod="Repeat"> 
                                                    <GradientStop Color="#B2000000" Offset="0"/> 
                                                    <GradientStop Color="#B2000000" Offset="0.5"/> 
                                                    <GradientStop Color="#D8FFFFFF" Offset="0.5"/> 
                                                    <GradientStop Color="#D8FFFFFF" Offset="1"/> 
                                                </LinearGradientBrush> 
                                            </DiscreteObjectKeyFrame.Value> 
                                        </DiscreteObjectKeyFrame> 
                                    </ObjectAnimationUsingKeyFrames> 
                                </Storyboard> 
                            </VisualState> 
                            <VisualState x:Name="Pressed"> 
                                <Storyboard> 
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="SelectedVisual" Storyboard.TargetProperty="Background" Duration="0.00:00:00.05"> 
                                        <DiscreteObjectKeyFrame KeyTime="0.00:00:00.0"> 
                                            <DiscreteObjectKeyFrame.Value> 
                                                <LinearGradientBrush StartPoint="0,0" EndPoint="3,3" MappingMode="Absolute" SpreadMethod="Repeat"> 
                                                    <GradientStop Color="#66000000" Offset="0"/> 
                                                    <GradientStop Color="#66000000" Offset="0.15"/> 
                                                    <GradientStop Color="#26FFFFFF" Offset="0.15"/> 
                                                    <GradientStop Color="#26FFFFFF" Offset="1"/> 
                                                </LinearGradientBrush> 
                                            </DiscreteObjectKeyFrame.Value> 
                                        </DiscreteObjectKeyFrame> 
                                    </ObjectAnimationUsingKeyFrames> 
                                </Storyboard> 
                            </VisualState> 
                        </VisualStateGroup> 
                    </VisualStateManager.VisualStateGroups> 
                    <Border 
                Name="border" 
                Background="{TemplateBinding Background}" 
                BorderBrush="{TemplateBinding BorderBrush}" 
                BorderThickness="{TemplateBinding BorderThickness}" 
                SnapsToDevicePixels="True"> 
                        <Border x:Name="SelectedVisual"> 
                            <Grid Margin="{TemplateBinding Padding}"> 
                                <Grid.RowDefinitions> 
                                    <RowDefinition Height="Auto"/> 
                                    <RowDefinition Height="*"/> 
                                </Grid.RowDefinitions> 
                                <ContentPresenter x:Name="ContentPresenter" 
                            Grid.Row="0" 
                            Content="{TemplateBinding Header}" 
                            ContentTemplate="{TemplateBinding HeaderTemplate}" 
                            ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}" 
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> 
                                <ItemsPresenter Grid.Row="1" /> 
                            </Grid> 
                        </Border> 
                    </Border> 
                    <Border x:Name="MouseOverVisual" BorderThickness="1" SnapsToDevicePixels="True"/> 
                </Grid> 
                <!-- This trigger changes the position of the ContentPresenter when the item does not have any children--> 
                <ControlTemplate.Triggers> 
                    <DataTrigger Binding="{Binding Items.Count, RelativeSource={RelativeSource Self}}" Value="0"> 
                        <Setter Property="Grid.Row" TargetName="ContentPresenter" Value="1" /> 
                    </DataTrigger> 
                </ControlTemplate.Triggers> 
            </ControlTemplate> 
        </Setter.Value> 
    </Setter> 
</Style> 

If you are using a different theme, make sure to exract and edit the ControlTemplate for the corresponding theme.

See Also

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