questão da fronteira WPF verticais TabItem

Question

Eu estou apenas começando com WPF e eu estou enfrentando um problema visual após exibindo TabControl no cabeçalho do texto Esquerda e Rotating TabItem 90 graus.

O problema é que a borda superior do cabeçalho TabItem não está mostrando. O código é o seguinte:

<Window x:Class="WPF_Exemplo1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="675" Width="900" ResizeMode="NoResize" WindowStyle="None" WindowState="Maximized">
    <Grid>
        <TabControl Margin="12,85.74,98.601,167.193" Name="tabControl1" TabStripPlacement="Left">
            <TabItem Name="tabItem1" FlowDirection="LeftToRight" FontSize="22" Height="60">
                <TabItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <Image Height="40" Width="40" Margin="20,0,0,0" VerticalAlignment="Center"></Image>
                        <TextBlock Margin="25,0,25,0" VerticalAlignment="Center">Item 1</TextBlock>
                    </StackPanel>
                </TabItem.Header>
                <TabItem.LayoutTransform>
                    <TransformGroup>
                        <RotateTransform Angle="-90"/>
                    </TransformGroup>
                </TabItem.LayoutTransform>
                <Grid />
            </TabItem>
        </TabControl>
    </Grid>
</Window>

Answer 1

Por itens guia padrão esconder a sua borda direita quando selecionado. Isso cria uma aparência visual de que se misturam com o conteúdo guia. No entanto, desde que você girado o item separador 90 graus já não serve esse propósito. Para obter a reação visual correta você precisará editar ControlTemplate do TabItem. A maneira mais fácil de fazer isso é começar com uma cópia do modelo (se você tiver Mistura você pode simplesmente ir para Editar Modelo de cópia). Se você não tem Mistura então você pode usar os recursos padrão criados por minha versão do Blend (abaixo). Em seguida, editar as propriedades de fronteira corretas para criar o visual que você quer.

<Window.Resources>
    <Style x:Key="TabItemFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle SnapsToDevicePixels="true" Margin="3,3,3,1" Stroke="Black" StrokeDashArray="1 2" StrokeThickness="1"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <SolidColorBrush x:Key="TabControlNormalBorderBrush" Color="#8C8E94"/>
    <LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0">
        <GradientStop Color="#F3F3F3" Offset="0"/>
        <GradientStop Color="#EBEBEB" Offset="0.5"/>
        <GradientStop Color="#DDDDDD" Offset="0.5"/>
        <GradientStop Color="#CDCDCD" Offset="1"/>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="TabItemHotBackground" EndPoint="0,1" StartPoint="0,0">
        <GradientStop Color="#EAF6FD" Offset="0.15"/>
        <GradientStop Color="#D9F0FC" Offset=".5"/>
        <GradientStop Color="#BEE6FD" Offset=".5"/>
        <GradientStop Color="#A7D9F5" Offset="1"/>
    </LinearGradientBrush>
    <SolidColorBrush x:Key="TabItemSelectedBackground" Color="#F9F9F9"/>
    <SolidColorBrush x:Key="TabItemHotBorderBrush" Color="#3C7FB1"/>
    <SolidColorBrush x:Key="TabItemDisabledBackground" Color="#F4F4F4"/>
    <SolidColorBrush x:Key="TabItemDisabledBorderBrush" Color="#FFC9C7BA"/>
    <Style x:Key="TabItemStyle1" TargetType="{x:Type TabItem}">
        <Setter Property="FocusVisualStyle" Value="{StaticResource TabItemFocusVisual}"/>
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="Padding" Value="6,1,6,1"/>
        <Setter Property="BorderBrush" Value="{StaticResource TabControlNormalBorderBrush}"/>
        <Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
        <Setter Property="VerticalContentAlignment" Value="Stretch"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TabItem}">
                    <Grid SnapsToDevicePixels="true">
                        <Border x:Name="Bd" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1,1,1,0" Padding="{TemplateBinding Padding}">
                            <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{Binding Path=HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" x:Name="Content" VerticalAlignment="{Binding Path=VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" ContentSource="Header" RecognizesAccessKey="True"/>
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemHotBackground}"/>
                        </Trigger>
                        <Trigger Property="IsSelected" Value="true">
                            <Setter Property="Panel.ZIndex" Value="1"/>
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemSelectedBackground}"/>
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="false"/>
                                <Condition Property="IsMouseOver" Value="true"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource TabItemHotBorderBrush}"/>
                        </MultiTrigger>
                        <Trigger Property="TabStripPlacement" Value="Bottom">
                            <Setter Property="BorderThickness" TargetName="Bd" Value="1,0,1,1"/>
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Left">
                            <Setter Property="BorderThickness" TargetName="Bd" Value="1,1,0,1"/>
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Right">
                            <Setter Property="BorderThickness" TargetName="Bd" Value="0,1,1,1"/>
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="true"/>
                                <Condition Property="TabStripPlacement" Value="Top"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Margin" Value="-2,-2,-2,-1"/>
                            <Setter Property="Margin" TargetName="Content" Value="0,0,0,1"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="true"/>
                                <Condition Property="TabStripPlacement" Value="Bottom"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Margin" Value="-2,-1,-2,-2"/>
                            <Setter Property="Margin" TargetName="Content" Value="0,1,0,0"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="true"/>
                                <Condition Property="TabStripPlacement" Value="Left"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Margin" Value="-2,-2,-1,-2"/>
                            <Setter Property="Margin" TargetName="Content" Value="0,0,1,0"/>
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="true"/>
                                <Condition Property="TabStripPlacement" Value="Right"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Margin" Value="-1,-2,-2,-2"/>
                            <Setter Property="Margin" TargetName="Content" Value="1,0,0,0"/>
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemDisabledBackground}"/>
                            <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource TabItemDisabledBorderBrush}"/>
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>