Forums | NoesisGUI

<Style TargetType="{x:Type ItemsControl}">
    <Setter Property="VirtualizingStackPanel.IsVirtualizing" Value="True" />
    <Setter Property="VirtualizingPanel.VirtualizationMode" Value="Recycling" />
    <Setter Property="VirtualizingPanel.ScrollUnit" Value="Pixel" />
</Style>

<Style TargetType="{x:Type ItemsControl}" BasedOn="{StaticResource NoesisControlStyle}">
        <Setter Property="VirtualizingStackPanel.IsVirtualizing" Value="True" />
        <Setter Property="VirtualizingPanel.VirtualizationMode" Value="Recycling" />
        <Setter Property="VirtualizingPanel.ScrollUnit" Value="Pixel" />
        <Setter Property="Background" Value="{x:Null}"/>
        <Setter Property="BorderBrush" Value="{x:Null}"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ItemsControl}">
                    <Border
                      Background="{TemplateBinding Background}"
                      BorderBrush="{TemplateBinding BorderBrush}"
                      BorderThickness="{TemplateBinding BorderThickness}"
                      Padding="{TemplateBinding Padding}">
                        <ItemsPresenter />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

<TreeView  ItemsSource="{Binding Root}" x:Name="modelTree" >
	<TreeView.ItemsPanel>
		<ItemsPanelTemplate>
			<VirtualizingStackPanel IsItemsHost="True" />                   
		</ItemsPanelTemplate>
	</TreeView.ItemsPanel>
	<TreeView.ItemContainerStyle>
		<!--Style binds a TreeViewItem to a TreeViewItemViewModel. -->
		<Style TargetType="{x:Type TreeViewItem}">
			<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
			<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
			<Setter Property="FontWeight" Value="Normal" />
			<Style.Triggers>
				<Trigger Property="IsSelected" Value="True">
					<Setter Property="FontWeight" Value="Bold" />
					<Setter Property="local:MainLayout.BringIntoViewWhenSelected" Value="True" />
				</Trigger>
			</Style.Triggers>
		</Style>
	</TreeView.ItemContainerStyle>
	<TreeView.Resources>
		<HierarchicalDataTemplate DataType="{x:Type viewModel:FileNode}" ItemsSource="{Binding Children}">
			<StackPanel Orientation="Horizontal" ContextMenu="{StaticResource TreeViewContextMenuTemplate}">
				<Image Width="16" Height="16" Margin="3,0" Source="../Images/Icons/ic_file_modeltree.png" />
				<TextBlock Text="{Binding Name}" Margin="0,2" />
			</StackPanel>
		</HierarchicalDataTemplate>
		<HierarchicalDataTemplate DataType="{x:Type viewModel:GroupNode}" ItemsSource="{Binding Children}">
			<StackPanel Orientation="Horizontal" ContextMenu="{StaticResource TreeViewContextMenuTemplate}">
				<Image Width="16" Height="16" Margin="3,0" Source="../Images/Icons/ic_group_modeltree.png" />
				<TextBlock Text="{Binding Name}" Margin="0,2" />
			</StackPanel>
		</HierarchicalDataTemplate>
		<HierarchicalDataTemplate DataType="{x:Type viewModel:LeafNode}" ItemsSource="{Binding Children}">
			<StackPanel Orientation="Horizontal" ContextMenu="{StaticResource TreeViewContextMenuTemplate}">
				<Image Width="16" Height="16" Margin="3,0" Source="../Images/Icons/ic_leaf_modeltree.png" />
				<TextBlock Text="{Binding Name}" Margin="0,2" />
			</StackPanel>
		</HierarchicalDataTemplate>
	</TreeView.Resources>
</TreeView>

IsVirtualizing="True"
VirtualizingStackPanel.IsVirtualizing="True"
VirtualizingPanel.VirtualizationMode="Recycling"
VirtualizingPanel.ScrollUnit="Pixel"