so i have been trying to style a scrollviewer, so that i can change the appearance of a scroll bar. But the problem I am facing, is that when I apply the scrollviewer style to the ListBox, I never see the content anymore.
This is the current style I have: (Unchanged from the default at the moment)
<Style x:Key="CustomScrollViewerStyle" TargetType="ScrollViewer">
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Top"/>
<Setter Property="VerticalScrollBarVisibility" Value="Visible"/>
<Setter Property="Padding" Value="4"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="BorderBrush">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFA3AEB9" Offset="0"/>
<GradientStop Color="#FF8399A9" Offset="0.375"/>
<GradientStop Color="#FF718597" Offset="0.375"/>
<GradientStop Color="#FF617584" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ScrollViewer">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2">
<Grid Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<ScrollContentPresenter x:Name="ScrollContentPresenter" Cursor="{TemplateBinding Cursor}" ContentTemplate="{TemplateBinding ContentTemplate}" Margin="{TemplateBinding Padding}"/>
<Rectangle Grid.Column="1" Fill="#FFE9EEF4" Grid.Row="1"/>
<ScrollBar x:Name="VerticalScrollBar" Grid.Column="1" IsTabStop="False" Maximum="{TemplateBinding ScrollableHeight}" Margin="0,-1,-1,-1" Minimum="0" Orientation="Vertical" Grid.Row="0" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{TemplateBinding VerticalOffset}" ViewportSize="{TemplateBinding ViewportHeight}" Width="18"/>
<ScrollBar x:Name="HorizontalScrollBar" Grid.Column="0" Height="18" IsTabStop="False" Maximum="{TemplateBinding ScrollableWidth}" Margin="-1,0,-1,-1" Minimum="0" Orientation="Horizontal" Grid.Row="1" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{TemplateBinding HorizontalOffset}" ViewportSize="{TemplateBinding ViewportWidth}"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
And my actual ListBox xaml is:
<Grid x:Name="LayoutRoot" Background="Transparent" Height="250">
<ListBox x:Name="iListBox" DataContext="{Binding}" ItemsSource="{Binding Path=ListVM.MyCollection}"
BorderBrush="Transparent" Background="Transparent"
ItemContainerStyle="{StaticResource ListBoxItemStyle1}">
<ListBox.Template>
<ControlTemplate TargetType="ItemsControl">
<ScrollViewer Style="{StaticResource CustomScrollViewerStyle}"/>
</ControlTemplate>
</ListBox.Template>
<ListBox.ItemTemplate >
<DataTemplate >
<Grid Background="Transparent" Loaded="Grid_Loaded">
<IReviewerList1:MyCollectionDataItem />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
Currently all I see is a scrollbar and no dataItems anymore. Was wondering what i was doing wrong? Any help would be great.
Thanks
The problem is that the ListBox doesn't know where to inject it's Items. If you insert a ItemsPresenter
in the styled ScrollViewer
the items should be visible again.
<ListBox.Template>
<ControlTemplate TargetType="ItemsControl">
<ScrollViewer Style="{StaticResource CustomScrollViewerStyle}">
<!-- I'm not sure if the correct name is necessary, or if
it's just for applying visual states -->
<ItemsPresenter x:Name="itemsPresenter" />
</ScrollViewer>
</ControlTemplate>
</ListBox.Template>
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