i want to style my GridSplitter like adding dots on it (as found on http://msdn.microsoft.com/en-us/library/aa970265.aspx).
i also want to change gridsplitter color on mouseOver, or apply Aero Theme.
<Style x:Key="GridSplitterStyle1" TargetType="{x:Type GridSplitter}">
<Setter Property="Background"
Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="PreviewStyle">
<Setter.Value>
<Style>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Fill="#80000000"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GridSplitter}">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!--Theme-->
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary
Source="/RibbonControlsLibrary;component/Themes/Office2007Blue.xaml" />
</ResourceDictionary.MergedDictionaries>
<GridSplitter x:Name="gridSplitterTreeNodes" Width="10"
BorderThickness="1,0" Cursor="SizeWE"
RenderTransformOrigin="-1.2,0.507" ShowsPreview="True"
Style="{DynamicResource GridSplitterStyle1}">
<GridSplitter.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFE3EFFF" Offset="0"/>
<GradientStop Color="#FFAFD2FF" Offset=".45"/>
</LinearGradientBrush>
</GridSplitter.Background>
</GridSplitter>
Mostly for my own future reference, here is a vertical grid splitter that has the rounded shape of a button (but doesn't react to mouseover properly):
<GridSplitter Grid.Column="1" VerticalAlignment="Stretch" HorizontalAlignment="Center" Width="8">
<GridSplitter.Template>
<ControlTemplate TargetType="{x:Type GridSplitter}">
<Grid>
<Button Content="⁞" />
<Rectangle Fill="#00FFFFFF" />
</Grid>
</ControlTemplate>
</GridSplitter.Template>
</GridSplitter>
A horizontal splitter could just use "····" as the Button's Content.