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У меня есть TabControl в MVV-приложении MVVM. Я создал шаблон для TabItem и TabControl на основе этого msdn topic. Я сделал некоторые изменения, и я добавил еще несколько состояний VisualStatManagers для поддержки состояний выбора и наведения на tabItems.WPF, TabControl, состояния выбора и наведения на TabItem
Вот мой шаблон ItemControl
<Style x:Key="TabItemStyle" TargetType="TabItem">
<Setter Property="Background" Value="{StaticResource TabControlBackgroundBrush}" />
<Setter Property="Foreground" Value="{StaticResource ForegroundBrush}" />
<Setter Property="FontSize" Value="13.333" />
<Setter Property="FontFamily" Value="Segoe UI" />
<Setter Property="MinHeight" Value="30" />
<Setter Property="Padding" Value="6,2" />
<Setter Property="Margin" Value="0" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
<Setter Property="BorderThickness" Value="1" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TabItem">
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="MouseOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Bd" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TabItemHoverBackgroundBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Bd" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TabItemHoverBorderBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource LightForegroundBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="DisabledVisualElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="BgSelected">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl1">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Foreground" Storyboard.TargetName="contentControl1">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource LightForegroundBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedUnfocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="BgSelected">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="contentControl">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource LightForegroundBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="FocusedVisualElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Rectangle x:Name="Bd" Fill="{TemplateBinding Background}" Stroke="{StaticResource TabItemHoverBorderBrush}" StrokeThickness="1" />
<Rectangle x:Name="BgSelected" Fill="{StaticResource TabItemSelectedBackgroundBrush}" Stroke="{StaticResource TabItemSelectedBorderBrush}" Visibility="Collapsed" />
<ContentControl x:Name="contentControl" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" Foreground="{TemplateBinding Foreground}">
<ContentPresenter x:Name="ContentSite"
ContentSource="Header"
RecognizesAccessKey="True"
Margin="-1,-1,-1,0"
VerticalAlignment="Center"/>
</ContentControl>
<ContentControl x:Name="contentControl1" Visibility="Collapsed" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" Foreground="{StaticResource ForegroundBrush}">
<ContentPresenter x:Name="ContentSite1"
ContentSource="Header"
RecognizesAccessKey="True"
Margin="-5,-5,-5,0"
VerticalAlignment="Center"/>
</ContentControl>
<Rectangle x:Name="FocusedVisualElement" IsHitTestVisible="False" Visibility="Collapsed" Stroke="{StaticResource TabControlPressedBorderBrush}" StrokeThickness="2"/>
<Rectangle x:Name="DisabledVisualElement" Fill="{StaticResource DisabledVisualElement}" Visibility="Collapsed"/>
</Grid>
<!--<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Panel.ZIndex" Value="100" />
</Trigger>
</ControlTemplate.Triggers>-->
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
И мой шаблон TabControl
<Style x:Key="TabControlStyle" TargetType="TabControl">
<Setter Property="Padding" Value="0" />
<Setter Property="Background" Value="{StaticResource TabControlBackgroundBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource TabControlBorderBrush}" />
<Setter Property="HorizontalContentAlignment" Value="Left" />
<Setter Property="VerticalContentAlignment" Value="Top" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="BorderThickness" Value="1" />
<!--<Setter Property="ItemContainerStyle" Value="{StaticResource TabItemStyle}" />-->
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TabControl">
<Grid KeyboardNavigation.TabNavigation="Local">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ValidationStates">
<VisualState x:Name="Valid" />
<VisualState x:Name="InvalidUnfocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="InvalidFocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsOpen" Storyboard.TargetName="validationTooltip">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<System:Boolean>True</System:Boolean>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<!--Tabs strip-->
<TabPanel x:Name="HeaderPanel" Grid.Row="0" Panel.ZIndex="1" IsItemsHost="True" KeyboardNavigation.TabIndex="1" Background="Transparent" Margin="0,0,4,-1"/>
<!--Border of the content-->
<Border x:Name="Border" Grid.Row="1" KeyboardNavigation.TabNavigation="Local" KeyboardNavigation.DirectionalNavigation="Contained" KeyboardNavigation.TabIndex="2" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}">
<ScrollViewer x:Name="ScrollViewer" BorderThickness="0" Padding="{TemplateBinding Padding}" Style="{StaticResource ScrollViewerStyle}">
<ContentPresenter Name="PART_SelectedContentHost" Margin="4" ContentSource="SelectedContent" />
</ScrollViewer>
</Border>
<Border x:Name="ValidationErrorElement" Grid.Row="1" BorderBrush="{StaticResource ValidationErrorElement}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2" Visibility="Collapsed">
<ToolTipService.ToolTip>
<ToolTip x:Name="validationTooltip" DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PlacementTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}" Template="{StaticResource ValidationToolTipTemplate}">
<ToolTip.Triggers>
<EventTrigger RoutedEvent="Canvas.Loaded">
<BeginStoryboard>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsHitTestVisible" Storyboard.TargetName="validationTooltip">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<System:Boolean>true</System:Boolean>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ToolTip.Triggers>
</ToolTip>
</ToolTipService.ToolTip>
<Grid Background="{StaticResource TransparentBrush}" HorizontalAlignment="Right" Height="10" Margin="0,-4,-4,0" VerticalAlignment="Top" Width="10">
<Path Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z" Fill="{StaticResource ValidationErrorElement}" Margin="-1,3,0,0" />
<Path Data="M 0,0 L2,0 L 8,6 L8,8" Fill="{StaticResource LightForegroundBrush}" Margin="-1,3,0,0" />
</Grid>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Моя проблема странное поведение моего шаблона в моем проекте. В VS2012 в дизайне xaml TabControl выглядит нормально. Но это полностью противоположно в скомпилированном приложении. Состояние выбора не работает. Фактически он представляет только нормальное состояние vsm. Я могу переключаться между содержимым TabItems, но состояние выделения и наведения (mouseOver) на вкладке не меняет цвет фона и границы. Как я сказал, только нормальное состояние VisualStateManager работает в выполненном приложении. Поскольку мы не можем отлаживать wpf vsm, я не могу понять, что вызывает эту проблему. Я думаю, что это проблема с VisualSateManager. Для тестирования я использовал одиночные окна с простым управлением вкладкой размещен ниже
<TabControl>
<TabItem Header="A">content A</TabItem>
<TabItem Header="B">content B</TabItem>
<TabItem Header="C">content C</TabItem>
</TabControl>
Если вы знаете, что вызывает проблемы с моим приложением, или вы встретились с подобной ситуацией с контролем в WPF мольбы помочь мне.