Remove Column Mouseover effect

[Mohammed Al]

I am trying to make the TreeListView control have a transparent background for the column headers. I have been able to do this by modifying the RadColumn Background="Transparent" and also the BorderThickness="0", as well as setting the Telerik_Windows_Controls_TreeList:ColumnView Background="Transparent" in the ScrollViewer portion of the RadTreeListView control template.

This results in everything looking as I desire until the user mouses over the column header. At this point, the background becomes a light gray, and I have been unsuccessful in manipulating the various templates and styles to remove this effect. Is there a way for me to stop the MouseOver effect from happening? 

[Valentin.Stoychev]

Hello Mohammed Al,

The only way is to edit the control template in Blend and to change it.

All the best,
Valentin.Stoychev
the Telerik team

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[Mohammed Al]

Yes but what part of code template do I edit? Here is default template that Blend creates:

    <Style x:Key="RadTreeListViewStyleCustom" TargetType="TelerikNavigation:RadTreeListView">
        <Setter Property="DataShaper">
            <Setter.Value>
                <Telerik_Windows_Controls_TreeList:CtpDataShaper/>
            </Setter.Value>
        </Setter>
        <Setter Property="TelerikDragDrop:RadDragAndDropManager.AllowDrop" Value="True"/>
        <Setter Property="IsTabStop" Value="False"/>
        <Setter Property="ExpanderStyle" Value="{StaticResource ItemExpanderStyle}"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TelerikNavigation:RadTreeListView">
                    <Grid>
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="DropStates">
                                <VisualState x:Name="DropImpossible"/>
                                <VisualState x:Name="DropPossible"/>
                                <VisualState x:Name="DropRootPossible">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ScrollViewer">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <SolidColorBrush Color="#7fFCD590"/>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <ScrollViewer x:Name="ScrollViewer" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" TelerikControls:ScrollViewerExtensions.EnableMouseWheel="True" HorizontalScrollBarVisibility="{Binding (ScrollViewer.HorizontalScrollBarVisibility), RelativeSource={RelativeSource TemplatedParent}}" IsTabStop="False" Padding="{TemplateBinding Padding}" VerticalScrollBarVisibility="{Binding (ScrollViewer.VerticalScrollBarVisibility), RelativeSource={RelativeSource TemplatedParent}}">
                            <Telerik_Windows_Controls_TreeList:TreeListPanel VerticalAlignment="Top">
                                <Telerik_Windows_Controls_TreeList:ColumnView x:Name="ColumnViewElement" Background="White" HorizontalAlignment="Stretch" ItemTemplate="{TemplateBinding ColumnTemplate}" ItemContainerStyleSelector="{TemplateBinding ColumnContainerStyleSelector}" ItemContainerStyle="{TemplateBinding ColumnContainerStyle}" ItemTemplateSelector="{TemplateBinding ColumnTemplateSelector}" Canvas.ZIndex="2"/>
                                <ItemsPresenter Canvas.ZIndex="0"/>
                            </Telerik_Windows_Controls_TreeList:TreeListPanel>
                        </ScrollViewer>
                        <Grid x:Name="DragBetweenItemsFeedback" HorizontalAlignment="Left" Height="8" IsHitTestVisible="False" Margin="{TemplateBinding Padding}" Visibility="Collapsed" VerticalAlignment="Top">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="8"/>
                                <ColumnDefinition/>
                            </Grid.ColumnDefinitions>
                            <Ellipse HorizontalAlignment="Left" Height="8" Stroke="DarkGray" StrokeThickness="2" VerticalAlignment="Center" Width="8"/>
                            <Rectangle Grid.Column="1" Fill="DarkGray" Height="2" Margin="-2,3,0,0" RadiusY="2" RadiusX="2" VerticalAlignment="Top"/>
                        </Grid>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <Telerik_Windows_Controls_TreeView:TreeViewPanel ChildDefaultLength="20"/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
    </Style>

I have tried adding VisualStates into a new VisualStateGroup called "CommonStates" for "MouseOver" and "MouseEnter" that would theoretically override the defaults, but they do not seem to have any effect. Is there a specific Storyboard I need to target? Or a different VisualState name? Or perhaps am I doing this on the wrong control? I think I just need a little direction.

Thanks,

Mohammed

[Dimitrina]

Hello Mohammed ,

Please, accept my apologies for my answered in the previous email.   Find attached a project with custom style for the RadColumn.

Sincerely yours,
Dimitrina
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.