RadGridView Filtering Control Template - wpf

Question

I defined a control template to replace the default template of the filtering control on the RadGridView. I am autogenerating columns, how do I apply this custom control template?
My Grid:
<telerik:RadGridView x:Name="dataGrid" telerik:StyleManager.Theme="Windows8Touch"
AutoGenerateColumns="True"
ColumnWidth="200"
ShowInsertRow="true"
GroupRenderMode="Flat"
ValidatesOnDataErrors="InEditMode"
AlternationCount="2"
RowHeight="50"
ItemsSource="{Binding Path=TemplateData, Mode=TwoWay}"
ShouldRefresh="{Binding Path=Refresh}"
IsReadOnlyBinding="{Binding IsReadOnly}"
CloseProgressWhenRendered="True"
ShowGroupPanel="False" CanUserSortColumns="False">
My template:
<ControlTemplate x:Key="FilteringControlTemplate" TargetType="telerik:FilteringControl">
<Border BorderThickness="{TemplateBinding BorderThickness}"
Margin="{TemplateBinding Margin}"
CornerRadius="1"
BorderBrush="{TemplateBinding BorderBrush}">
<Border BorderBrush="{StaticResource ControlInnerBorder}" BorderThickness="1" Background="{TemplateBinding Background}">
<StackPanel MinWidth="200" MaxWidth="350" Margin="{TemplateBinding Padding}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}">
<TextBlock Foreground="Red" FontSize="18">Look, I am different ;)</TextBlock>
<StackPanel x:Name="PART_DistinctFilter" Visibility="{TemplateBinding DistinctFiltersVisibility}">
<CheckBox x:Name="PART_SelectAllCheckBox"
IsChecked="{Binding SelectAll, Mode=TwoWay}"
Margin="0,2"
telerik:LocalizationManager.ResourceKey="GridViewFilterSelectAll"
telerik:StyleManager.Theme="{StaticResource Theme}"/>
<ListBox x:Name="PART_DistinctValuesList"
ItemsSource="{Binding DistinctValues}"
telerik:StyleManager.Theme="{StaticResource Theme}"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
MaxHeight="250"
SelectionMode="Multiple">
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding IsActive, Mode=TwoWay}"
Content="{Binding ConvertedValue}"
VerticalContentAlignment="Center"
telerik:StyleManager.Theme="{StaticResource Theme}"/>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem"
BasedOn="{StaticResource {telerik:ThemeResourceKey ThemeType=telerik:Office_BlackTheme, ElementType=ListBoxItem}}"
>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
</StackPanel>
<StackPanel Margin="0,2">
<TextBlock telerik:LocalizationManager.ResourceKey="GridViewFilterShowRowsWithValueThat" Margin="0,2,0,0" />
<telerik:RadComboBox x:Name="PART_Filter1ComboBox"
Margin="0,2,0,2"
ItemTemplate="{StaticResource ActionTemplate}"
telerik:StyleManager.Theme="{StaticResource Theme}"
ItemsSource="{Binding AvailableActions}"
SelectedItem="{Binding Filter1.Operator, Mode=TwoWay}" />
<TextBox x:Name="PART_Filter1TextBox"
Text="{Binding Filter1.Value, Mode=TwoWay}"
VerticalContentAlignment="Center"
Margin="0,2" Padding="3,0"
telerik:StyleManager.Theme="{StaticResource Theme}"
Height="22" />
<CheckBox x:Name="PART_Filter1MatchCaseCheckBox"
IsChecked="{Binding Filter1.IsCaseSensitive, Mode=TwoWay}"
Visibility="{Binding MatchCaseVisibility}"
Margin="0,2"
telerik:LocalizationManager.ResourceKey="GridViewFilterMatchCase"
telerik:StyleManager.Theme="{StaticResource Theme}"/>
<telerik:RadComboBox x:Name="PART_LogicalOperatorsComboBox"
Margin="0,2"
telerik:StyleManager.Theme="{StaticResource Theme}"
ItemTemplate="{StaticResource LogicalOperatorTemplate}"
ItemsSource="{Binding LogicalOperators}"
SelectedItem="{Binding FieldFilterLogicalOperator, Mode=TwoWay}" />
<telerik:RadComboBox x:Name="PART_Filter2ComboBox"
Margin="0,2"
telerik:StyleManager.Theme="{StaticResource Theme}"
ItemTemplate="{StaticResource ActionTemplate}"
ItemsSource="{Binding AvailableActions}"
SelectedItem="{Binding Filter2.Operator, Mode=TwoWay}" />
<TextBox x:Name="PART_Filter2TextBox"
Text="{Binding Filter2.Value, Mode=TwoWay}"
VerticalContentAlignment="Center"
Margin="0,2" Padding="3,0"
telerik:StyleManager.Theme="{StaticResource Theme}"
Height="22" />
<CheckBox x:Name="PART_Filter2MatchCaseCheckBox"
IsChecked="{Binding Filter2.IsCaseSensitive, Mode=TwoWay}"
Visibility="{Binding MatchCaseVisibility}"
Margin="0,2"
telerik:LocalizationManager.ResourceKey="GridViewFilterMatchCase"
telerik:StyleManager.Theme="{StaticResource Theme}"/>
</StackPanel>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Button x:Name="PART_ApplyFilterButton" Grid.Column="0"
Margin="0,2,2,2" Height="22"
telerik:LocalizationManager.ResourceKey="GridViewFilter"
telerik:StyleManager.Theme="{StaticResource Theme}" />
<Button x:Name="PART_ClearFilterButton" Grid.Column="1"
Margin="2,2,0,2" Height="22"
telerik:LocalizationManager.ResourceKey="GridViewClearFilter"
telerik:StyleManager.Theme="{StaticResource Theme}" />
</Grid>
</StackPanel>
</Border>
</Border>
</ControlTemplate>

Answer 1

add a style, which automatically applies the template:
<Style TargetType="telerik:FilteringControl">
<Setter Property="Template" Value="{StaticResource FilteringControlTemplate}" />
</Style>
That way, you don't need to change anything in the visual tree.