Develop Reference

WPF C# ListBox IsMouseOver and IsSelected background

I am have made the following usercontrol, and all works well except the 2 Background setter properties with value transparent for both isMouseOver and IsSelected that do nothing..
<UserControl.Resources>
<DataTemplate x:Key="DeviceItemTemplate">
<Border Padding="10,5" Margin="10" BorderThickness="4" BorderBrush="Green" CornerRadius="20" Height="150" Width="150">
<StackPanel Orientation="Vertical">
<TextBox Name="screenNameTextBox"
Margin="10" Height="20"
Text="{Binding Name}" />
<TextBox
Margin="10" Height="20"
Text="{Binding Location}" />
</StackPanel>
</Border>
</DataTemplate>
<DataTemplate x:Key="DeviceItemTemplateSelected">
<Border Padding="10,5" Margin="10" BorderThickness="4" BorderBrush="Orange" CornerRadius="20" Height="150" Width="150" >
<StackPanel Orientation="Vertical" >
<TextBox Name="screenNameTextBox"
Margin="10" Height="20"
Text="{Binding Name}" />
<TextBox
Margin="10" Height="20"
Text="{Binding Location}" />
</StackPanel>
</Border>
</DataTemplate>
<Style TargetType="{x:Type ListBoxItem}" x:Key="DeviceContainerStyle">
<Setter Property="ContentTemplate" Value="{DynamicResource DeviceItemTemplate}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True" >
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Background" Value="Transparent" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="ContentTemplate" Value="{DynamicResource DeviceItemTemplateSelected}"/>
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Background" Value="Transparent" />
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
<Border
Grid.Column="0"
Margin="10"
BorderBrush="Silver"
BorderThickness="1">
<ListBox ItemsSource="{Binding Devices, UpdateSourceTrigger=PropertyChanged}"
SelectedItem="{Binding SelectedScreen, Mode=TwoWay}"
ItemContainerStyle="{StaticResource DeviceContainerStyle}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled" >
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True" Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</Border>
This is how it looks
I also tried white, but got same results. I cannot get rid of this blue background.
What am I overlooking please?
-----After receiving mm8 answer-----
Placed all his code in a resource dictionary, made some changes to the solidcolorbrush and BorderThickness, and modified the style section from previous to:
<Style BasedOn="{StaticResource ListBoxItemSSDS}" TargetType="{x:Type ListBoxItem}" x:Key="DeviceContainerStyle">
<Setter Property="ContentTemplate" Value="{DynamicResource DeviceItemTemplate}"/>
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="ContentTemplate" Value="{DynamicResource DeviceItemTemplateSelected}"/>
</Trigger>
</Style.Triggers>
</Style>

You need to define a custom ControlTemplate for the ListBoxItem to be able to the background of it when the IsMouseOver and IsSelected properties are set.
You can right-click on a ListBoxItem in design mode in Visual Studio or in Blend and choose Edit Template->Edit a Copy to copy the default template into your XAML markup and then edit it as per your requirements.
Here is what it looks like and the resources that are involved:
<Style x:Key="FocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="Item.MouseOver.Background" Color="#1F26A0DA"/>
<SolidColorBrush x:Key="Item.MouseOver.Border" Color="#a826A0Da"/>
<SolidColorBrush x:Key="Item.SelectedInactive.Background" Color="#3DDADADA"/>
<SolidColorBrush x:Key="Item.SelectedInactive.Border" Color="#FFDADADA"/>
<SolidColorBrush x:Key="Item.SelectedActive.Background" Color="#3D26A0DA"/>
<SolidColorBrush x:Key="Item.SelectedActive.Border" Color="#FF26A0DA"/>
<Style x:Key="ListBoxItemStyle1" TargetType="{x:Type ListBoxItem}">
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="Padding" Value="4,1"/>
<Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.MouseOver.Border}"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="False"/>
<Condition Property="IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.SelectedInactive.Background}"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedInactive.Border}"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="True"/>
<Condition Property="IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="{StaticResource Item.SelectedActive.Background}"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource Item.SelectedActive.Border}"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
You may for example change the Color of the Item.MouseOver.Background and Item.SelectedActive.Background resources.

WPF DataGridCell watermark style. Cannot edit the cell

I wanted to add a style to a DataGridCell in my app to have the effect of a watermarked "hint" in case the cell is empty to give the user a hint about what he needs to type in the cell.
<Window.Resources>
<Style x:Key="WatermarkTextBox" TargetType="{x:Type DataGridCell}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridCell}">
<Grid>
<Border x:Name="BorderBase" Background="White" BorderThickness="1.4,1.4,1,1" BorderBrush="Red">
<Label x:Name="TextPrompt"
Content="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=Tag}"
Background="{TemplateBinding Background}" Visibility="Visible"
Focusable="False" Foreground="Silver"/>
</Border>
<!--<ScrollViewer Margin="0" x:Name="PART_ContentHost" Foreground="Black"/>-->
</Grid>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsFocused" Value="False"/>
<Condition Property="Content" Value=""/>
</MultiTrigger.Conditions>
<Setter Property="Visibility" TargetName="TextPrompt" Value="Visible"/>
</MultiTrigger>
<Trigger Property="IsFocused" Value="True">
<Setter Property="BorderBrush" TargetName="BorderBase" Value="Black"/>
<Setter Property="Visibility" TargetName="TextPrompt" Value="Collapsed"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="DimGray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
And this is my code:
Style style = this.FindResource("WatermarkTextBox") as Style;
myCell.Tag = "input position here please";
myCell.Style = style;
And it works fine. When this code is executed, the watermark style is applied correctly. But when I focus on the cell, I cannot write anything.
I mean, the "IsFocused" trigger is executed and the Label is collapsed (it disappears) but I cannot input anything inside the cell.

You are missing a ContentPresenter:
<Style x:Key="WatermarkTextBox" TargetType="{x:Type DataGridCell}">
<Setter Property="Tag" Value="insert" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridCell}">
<Grid>
<Border x:Name="BorderBase" Background="White" BorderThickness="1.4,1.4,1,1" BorderBrush="Red">
<Label x:Name="TextPrompt"
Content="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=Tag}"
Background="{TemplateBinding Background}" Visibility="Visible"
Focusable="False" Foreground="Silver"/>
</Border>
<ContentPresenter x:Name="cp" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Grid>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsFocused" Value="False"/>
<Condition Property="Content" Value=""/>
</MultiTrigger.Conditions>
<Setter Property="Visibility" TargetName="TextPrompt" Value="Visible"/>
<Setter Property="Visibility" TargetName="cp" Value="Collapsed"/>
</MultiTrigger>
<Trigger Property="IsFocused" Value="True">
<Setter Property="BorderBrush" TargetName="BorderBase" Value="Black"/>
<Setter Property="Visibility" TargetName="TextPrompt" Value="Collapsed"/>
<Setter Property="Visibility" TargetName="cp" Value="Visible"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="DimGray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

Try This, Updated
<Style x:Key="WatermarkTextBox" TargetType="{x:Type TextBox}">
<Setter Property="FontSize" Value="12" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBoxBase}">
<Grid>
<Border
x:Name="border"
SnapsToDevicePixels="True">
<ScrollViewer
x:Name="PART_ContentHost"
Focusable="False"
HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Hidden" />
</Border>
<TextBlock
x:Name="placeholder"
VerticalAlignment="Center"
IsHitTestVisible="False"
Text="{TemplateBinding Tag}">
<TextBlock.Style>
<Style TargetType="{x:Type TextBlock}">
<Setter Property="Visibility" Value="Collapsed" />
<Style.Triggers>
<DataTrigger Binding="{Binding Text, RelativeSource={RelativeSource TemplatedParent}}" Value="">
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="border" Property="Opacity" Value="0.56" />
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="#FF7EB4EA" />
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="#FF569DE5" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Usage
<DataGrid.Columns>
<DataGridTemplateColumn Header=" Tags ">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox Style="{StaticResource WatermarkTextBox}"
FontSize="12"
VerticalAlignment="Center"
Tag="Stage Name .."
Width="60"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

How to make visible only button image?

I have "Save" button which has two states: invisible (when no changes) and visible: when some text changed.
So, I create XAML:
<Button x:Name="btnSaveText"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Center"
Margin="0,0,1,0" Width="22" Height="22" Padding="0"
BorderBrush="#EFF4FA"
Background="#EFF4FA" IsEnabled="False"
Style="{StaticResource stlButton}">
<Image Source="/UI.Resources;component/PNGImages/Save.png"
Style="{StaticResource stlButtonImage}" />
</Button>
<Style TargetType="{x:Type Image}" x:Key="stlButtonImage">
<Setter Property="Margin" Value="1" />
<Setter Property="HorizontalAlignment" Value="Center" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="Stretch" Value="None" />
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="{x:Type Button}" x:Key="stlButton">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
<Setter Property="BorderBrush" Value="#EFF4FA"/>
<Setter Property="Background" Value="#EFF4FA"/>
</Trigger>
</Style.Triggers>
</Style>
But, when the button is disabled it looks like this:
How to make visible only button image?

Set the Buttons Background to Transparent :
<Setter Property="Background" Value="Transparent"/>
Full sample:
<Style TargetType="{x:Type Button}" x:Key="stlButton">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
<Setter Property="BorderBrush" Value="#EFF4FA"/>
<Setter Property="Background" Value="Transparent"/>
</Trigger>
</Style.Triggers>
</Style>
If you also want to get rid of the Border you could link it to the Background that will make it invisible, too:
<Style TargetType="{x:Type Button}" x:Key="stlButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
<Setter Property="Background" Value="Transparent"/>
</Trigger>
</Style.Triggers>
</Style>

Remove Separators focus from ListViewItem

I just wrote some ListViewItem Style that contains Separator in ContentTemplate. a problem is when I click item, Separator have focus with ContentPresenter. but I want remove Separators focus and only ContentPresenter have focus.
what should I do?
<Style x:Key="AltItemBackground" TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<StackPanel>
<Separator x:Name="Separator"/>
<ContentPresenter Content="{Binding}" />
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="ItemsControl.AlternationIndex" Value="0">
<Setter Property="Background" Value="White"></Setter>
</Trigger>
<Trigger Property="ItemsControl.AlternationIndex" Value="1">
<Setter Property="Background" Value="#E6E6E6"></Setter>
</Trigger>
</Style.Triggers>
</Style>

Using the default ControlTemplate of a ListViewItem and modifying it a bit I created this application, maybe this is what you're looking for:
<Window x:Class="ListViewItemSeparator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:system="clr-namespace:System;assembly=mscorlib"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<StackPanel>
<Separator x:Name="Separator" />
<Border BorderThickness="{TemplateBinding Border.BorderThickness}"
Padding="{TemplateBinding Control.Padding}"
BorderBrush="{TemplateBinding Border.BorderBrush}"
Background="{TemplateBinding Panel.Background}"
Name="Bd" SnapsToDevicePixels="True">
<ContentPresenter Content="{TemplateBinding ContentControl.Content}"
ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}"
HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
</Border>
</StackPanel>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="UIElement.IsMouseOver" Value="True" />
</MultiTrigger.Conditions>
<Setter Property="Panel.Background" TargetName="Bd" Value="#1F26A0DA" />
<Setter Property="Border.BorderBrush" TargetName="Bd" Value="#A826A0DA" />
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="False" />
<Condition Property="Selector.IsSelected" Value="True" />
</MultiTrigger.Conditions>
<Setter Property="Panel.Background" TargetName="Bd" Value="#3DDADADA" />
<Setter Property="Border.BorderBrush" TargetName="Bd" Value="#FFDADADA" />
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="True" />
<Condition Property="Selector.IsSelected" Value="True" />
</MultiTrigger.Conditions>
<Setter Property="Panel.Background" TargetName="Bd" Value="#3D26A0DA" />
<Setter Property="Border.BorderBrush" TargetName="Bd" Value="#FF26A0DA" />
</MultiTrigger>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
</Trigger>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource PreviousData}}" Value="{x:Null}">
<Setter TargetName="Separator" Property="Visibility" Value="Collapsed"></Setter>
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
<Style.Triggers>
<Trigger Property="ItemsControl.AlternationIndex" Value="0">
<Setter Property="Background" Value="White"></Setter>
</Trigger>
<Trigger Property="ItemsControl.AlternationIndex" Value="1">
<Setter Property="Background" Value="#E6E6E6"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<ListView ItemsControl.AlternationCount="2">
<system:String>First item</system:String>
<system:String>Second item</system:String>
<system:String>Third item</system:String>
<system:String>Fourth item</system:String>
<system:String>Fifth item</system:String>
</ListView>
</Grid>
</Window>
Unselected state:
Selected state:

How to disable the treeviewitem background color change?

I have a following problem: I have two treeview controls in my WPF app and when I click on one of the items in first tree and then click on one of the items in second tree, then the item in first tree changes it backgroud color. I tried to change the background color in the multitrigger
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
for template property but with no effect. How can I disable this behaviour ? Here Is my sample window code(Im not changing the treeview control in code behind)
<Window x:Class="StackOverflowTests.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<SolidColorBrush x:Key="ListBorder" Color="#828790"/>
<Style x:Key="TreeViewStyle1" TargetType="{x:Type TreeView}">
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="BorderBrush" Value="{StaticResource ListBorder}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.PanningMode" Value="Both"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeView}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="true">
<ScrollViewer x:Name="_tv_scrollviewer_" Background="{TemplateBinding Background}" CanContentScroll="false" Focusable="false" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
<ItemsPresenter/>
</ScrollViewer>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
</Trigger>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter Property="CanContentScroll" TargetName="_tv_scrollviewer_" Value="true"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<VirtualizingStackPanel/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Fill" Color="#FF595959"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Stroke" Color="#FF262626"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Stroke" Color="#FF1BBBFA"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Fill" Color="Transparent"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Stroke" Color="#FF262626"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Fill" Color="#FF595959"/>
<PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Fill" Color="Transparent"/>
<SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Stroke" Color="#FF989898"/>
<Style x:Key="ExpandCollapseToggleStyle" TargetType="{x:Type ToggleButton}">
<Setter Property="Focusable" Value="False"/>
<Setter Property="Width" Value="16"/>
<Setter Property="Height" Value="16"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Border Background="Transparent" Height="16" Padding="5,5,5,5" Width="16">
<Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{StaticResource TreeViewItem.TreeArrow.Static.Fill}" Stroke="{StaticResource TreeViewItem.TreeArrow.Static.Stroke}">
<Path.RenderTransform>
<RotateTransform Angle="135" CenterY="3" CenterX="3"/>
</Path.RenderTransform>
</Path>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="RenderTransform" TargetName="ExpandPath">
<Setter.Value>
<RotateTransform Angle="180" CenterY="3" CenterX="3"/>
</Setter.Value>
</Setter>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Fill}"/>
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Stroke}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Stroke}"/>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Fill}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
<Condition Property="IsChecked" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Stroke}"/>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Fill}"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TreeViewItemStyle1" TargetType="{x:Type TreeViewItem}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Padding" Value="1,0,0,0"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeViewItem}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="19" Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{DynamicResource ToggleButtonStyle1}"/>
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
<ItemsPresenter x:Name="ItemsHost" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="false">
<Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Visibility" TargetName="Expander" Value="Hidden"/>
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<VirtualizingStackPanel/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="ToggleButtonStyle1" TargetType="{x:Type ToggleButton}">
<Setter Property="Focusable" Value="False"/>
<Setter Property="Width" Value="16"/>
<Setter Property="Height" Value="16"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Border Background="Transparent" Height="16" Padding="5,5,5,5" Width="16">
<Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{DynamicResource {x:Static SystemColors.HotTrackBrushKey}}" Stroke="{StaticResource TreeViewItem.TreeArrow.Static.Stroke}">
<Path.RenderTransform>
<RotateTransform Angle="135" CenterY="3" CenterX="3"/>
</Path.RenderTransform>
</Path>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="RenderTransform" TargetName="ExpandPath">
<Setter.Value>
<RotateTransform Angle="180" CenterY="3" CenterX="3"/>
</Setter.Value>
</Setter>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Fill}"/>
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Stroke}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Stroke}"/>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Fill}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
<Condition Property="IsChecked" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Stroke}"/>
<Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Fill}"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<StackPanel Orientation="Horizontal">
<TreeView x:Name="XX" HorizontalAlignment="Left" Height="100" VerticalAlignment="Top" Width="100" Style="{DynamicResource TreeViewStyle1}" Background="#7B898C">
<TreeViewItem Header="XXXX_1" Style="{StaticResource TreeViewItemStyle1}">
<TreeViewItem Header="XXXX_2" HorizontalAlignment="Left" />
</TreeViewItem>
</TreeView>
<TreeView x:Name="XX2" Margin="10,0,0,0" HorizontalAlignment="Left" Height="100" VerticalAlignment="Top" Width="100" Style="{DynamicResource TreeViewStyle1}" Background="#7B898C">
<TreeViewItem Header="XXXX_3" Style="{StaticResource TreeViewItemStyle1}">
<TreeViewItem Header="XXXX_4" HorizontalAlignment="Left" />
</TreeViewItem>
</TreeView>
</StackPanel>
</Grid>

Only thing I can see wrong in the code you've posted is your Trigger's Setter sets both Background and Foreground to the same color {DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}
You could also maybe try setting the MultiTrigger condition as Selector.IsSelectionActive to be explicit:
I tried your posted code with these changes (Works fine for me in Windows-8):
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected"
Value="true" />
<Condition Property="Selector.IsSelectionActive"
Value="false" />
</MultiTrigger.Conditions>
<Setter TargetName="Bd"
Property="Background"
Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
</MultiTrigger>
Output:
Note:
Your only setting Style for the Top TreeViewItem as TreeViewItemStyle1. Hence the default Style gets applied to the Child TreeViewItem's which don't specify a Style. If you want it to apply automatically to all TreeViewItem's just remove the Style Key in declaration and it should be applied automatically based on the TargetType