Merge branch 'master' into fluent-scrollbar

native/Avalonia.Native/src/OSX/window.mm

@@ -1107,7 +1107,11 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     _lastPixelSize.Width = (int)fsize.width;
     _lastPixelSize.Height = (int)fsize.height;
     [self updateRenderTarget];
-    _parent->BaseEvents->ScalingChanged([_parent->Window backingScaleFactor]);
+    
+    if(_parent != nullptr)
+    {
+        _parent->BaseEvents->ScalingChanged([_parent->Window backingScaleFactor]);
+    }
     
     [super viewDidChangeBackingProperties];
 }
@@ -1166,7 +1170,12 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     auto modifiers = [self getModifiers:[event modifierFlags]];
     
     [self becomeFirstResponder];
-    _parent->BaseEvents->RawMouseEvent(type, timestamp, modifiers, point, delta);
+    
+    if(_parent != nullptr)
+    {
+        _parent->BaseEvents->RawMouseEvent(type, timestamp, modifiers, point, delta);
+    }
+    
     [super mouseMoved:event];
 }
 
@@ -1290,7 +1299,10 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     auto timestamp = [event timestamp] * 1000;
     auto modifiers = [self getModifiers:[event modifierFlags]];
      
-    _lastKeyHandled = _parent->BaseEvents->RawKeyEvent(type, timestamp, modifiers, key);
+    if(_parent != nullptr)
+    {
+        _lastKeyHandled = _parent->BaseEvents->RawKeyEvent(type, timestamp, modifiers, key);
+    }
 }
 
 - (BOOL)performKeyEquivalent:(NSEvent *)event
@@ -1381,7 +1393,10 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
 {
     if(!_lastKeyHandled)
     {
-        _lastKeyHandled = _parent->BaseEvents->RawTextInputEvent(0, [string UTF8String]);
+        if(_parent != nullptr)
+        {
+            _lastKeyHandled = _parent->BaseEvents->RawTextInputEvent(0, [string UTF8String]);
+        }
     }
 }
 
@@ -1677,7 +1692,11 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     {
         [self showWindowMenuWithAppMenu];
         
-        _parent->BaseEvents->Activated();
+        if(_parent != nullptr)
+        {
+            _parent->BaseEvents->Activated();
+        }
+        
         [super becomeKeyWindow];
     }
 }
@@ -1794,8 +1813,12 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
 - (void)windowDidMove:(NSNotification *)notification
 {
     AvnPoint position;
-    _parent->GetPosition(&position);
-    _parent->BaseEvents->PositionChanged(position);
+    
+    if(_parent != nullptr)
+    {
+        _parent->GetPosition(&position);
+        _parent->BaseEvents->PositionChanged(position);
+    }
 }
 @end
 

readme.md

@@ -31,7 +31,9 @@ Install-Package Avalonia.Desktop
 Examples of UIs built with Avalonia
 ![image](https://user-images.githubusercontent.com/4672627/84707589-5b69a880-af35-11ea-87a6-7ad57a31d314.png)
 
-![image](https://user-images.githubusercontent.com/4672627/84708576-28281900-af37-11ea-8c88-e29dfcfa0558.png)
+![image](https://user-images.githubusercontent.com/4672627/85069644-d8419000-b18a-11ea-8732-be9055bb61fd.PNG)
+
+![image](https://user-images.githubusercontent.com/4672627/85069659-dc6dad80-b18a-11ea-8375-39ef95315b5c.PNG)
 
 ![image](https://user-images.githubusercontent.com/4672627/84708947-c3b98980-af37-11ea-8c9d-503334615bbf.png)
 

samples/ControlCatalog/SideBar.xaml

@@ -67,6 +67,9 @@
         <Setter Property="(ScrollViewer.HorizontalScrollBarVisibility)" Value="Auto"/>
         <Setter Property="(ScrollViewer.VerticalScrollBarVisibility)" Value="Auto"/>
     </Style>
+    <Style Selector="TabControl.sidebar > TabItem:selected /template/ Border#PART_SelectedPipe">
+        <Setter Property="IsVisible" Value="False" />
+    </Style>
     <Style Selector="TabControl.sidebar > TabItem:pointerover">
         <Setter Property="Opacity" Value="1"/>
     </Style>

src/Avalonia.Controls/TabItem.cs

@@ -26,6 +26,7 @@ namespace Avalonia.Controls
         static TabItem()
         {
             SelectableMixin.Attach<TabItem>(IsSelectedProperty);
+            PressedMixin.Attach<TabItem>();
             FocusableProperty.OverrideDefaultValue(typeof(TabItem), true);
             DataContextProperty.Changed.AddClassHandler<TabItem>((x, e) => x.UpdateHeader(e));
         }

src/Avalonia.Themes.Fluent/Accents/FluentBaseDark.xaml

@@ -452,5 +452,73 @@
 
     <!-- BaseResources for ScrollViewer.xaml -->
     <SolidColorBrush x:Key="ScrollViewerScrollBarsSeparatorBackground" Color="{StaticResource SystemChromeMediumColor}" Opacity="0.9" />
+    <!-- Resources for Pivot.xaml -->
+    <FontFamily x:Key="PivotHeaderItemFontFamily">XamlAutoFontFamily</FontFamily>
+    <FontFamily x:Key="PivotTitleFontFamily">XamlAutoFontFamily</FontFamily>
+    <x:Double x:Key="PivotHeaderItemFontSize">24</x:Double>
+    <x:Double x:Key="PivotHeaderItemLockedTranslation">40</x:Double>
+    <x:Double x:Key="PivotTitleFontSize">14</x:Double>
+    <x:Int32 x:Key="PivotHeaderItemCharacterSpacing">-25</x:Int32>
+    <Thickness x:Key="PivotHeaderItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotLandscapeThemePadding">12,14,0,13</Thickness>
+    <Thickness x:Key="PivotNavButtonBorderThemeThickness">0</Thickness>
+    <Thickness x:Key="PivotNavButtonMargin">0,6,0,0</Thickness>
+    <Thickness x:Key="PivotPortraitThemePadding">12,14,0,13</Thickness>
+    <FontWeight x:Key="PivotHeaderItemThemeFontWeight">SemiLight</FontWeight>
+    <FontWeight x:Key="PivotTitleThemeFontWeight">Bold</FontWeight>
+    <StaticResource x:Key="PivotBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <!-- Resources for PivotItem -->
+    <StaticResource x:Key="PivotItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <!-- Resources for PivotHeaderItem -->
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelected" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselected" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotHeaderItemFocusPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <StaticResource x:Key="PivotHeaderItemSelectedPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <SolidColorBrush x:Key="PivotForegroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundSelectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundUnselectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundSelectedBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundUnselectedBrush" Color="#66FFFFFF" />
+    <SolidColorBrush x:Key="PivotNavButtonBackgroundThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonBorderThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonForegroundThemeBrush" Color="#99000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBackgroundThemeBrush" Color="#F0D7D7D7" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBorderThemeBrush" Color="#9EC1C1C1" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBackgroundThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBorderThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedForegroundThemeBrush" Color="#FFFFFFFF" />
   </Style.Resources>
 </Style>

src/Avalonia.Themes.Fluent/Accents/FluentBaseLight.xaml

@@ -404,5 +404,74 @@
     <SolidColorBrush x:Key="ToolTipBackgroundThemeBrush" Color="#FFFFFFFF" />
     <SolidColorBrush x:Key="ToolTipBorderThemeBrush" Color="#FF808080" />
     <SolidColorBrush x:Key="ToolTipForegroundThemeBrush" Color="#FF666666" />
+
+    <!-- Resources for Pivot.xaml -->
+    <FontFamily x:Key="PivotHeaderItemFontFamily">XamlAutoFontFamily</FontFamily>
+    <FontFamily x:Key="PivotTitleFontFamily">XamlAutoFontFamily</FontFamily>
+    <x:Double x:Key="PivotHeaderItemFontSize">24</x:Double>
+    <x:Double x:Key="PivotHeaderItemLockedTranslation">40</x:Double>
+    <x:Double x:Key="PivotTitleFontSize">14</x:Double>
+    <x:Int32 x:Key="PivotHeaderItemCharacterSpacing">-25</x:Int32>
+    <Thickness x:Key="PivotHeaderItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotLandscapeThemePadding">12,14,0,13</Thickness>
+    <Thickness x:Key="PivotNavButtonBorderThemeThickness">0</Thickness>
+    <Thickness x:Key="PivotNavButtonMargin">0,6,0,0</Thickness>
+    <Thickness x:Key="PivotPortraitThemePadding">12,14,0,13</Thickness>
+    <FontWeight x:Key="PivotHeaderItemThemeFontWeight">SemiLight</FontWeight>
+    <FontWeight x:Key="PivotTitleThemeFontWeight">Bold</FontWeight>
+    <StaticResource x:Key="PivotBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <!-- Resources for PivotItem -->
+    <StaticResource x:Key="PivotItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <!-- Resources for PivotHeaderItem -->
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelected" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselected" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotHeaderItemFocusPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <StaticResource x:Key="PivotHeaderItemSelectedPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <SolidColorBrush x:Key="PivotForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundSelectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundUnselectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundSelectedBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundUnselectedBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="PivotNavButtonBackgroundThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonBorderThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonForegroundThemeBrush" Color="#99000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBackgroundThemeBrush" Color="#F0D7D7D7" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBorderThemeBrush" Color="#9EC1C1C1" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBackgroundThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBorderThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedForegroundThemeBrush" Color="#FFFFFFFF" />
   </Style.Resources>
 </Style>

src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml

@@ -721,5 +721,73 @@
     <x:String x:Key="ScrollBarExpandBeginTime">00:00:00.40</x:String>
     <x:String x:Key="ScrollBarContractBeginTime">00:00:02.00</x:String>
 
+    <!-- Resources for Pivot.xaml -->
+    <FontFamily x:Key="PivotHeaderItemFontFamily">XamlAutoFontFamily</FontFamily>
+    <FontFamily x:Key="PivotTitleFontFamily">XamlAutoFontFamily</FontFamily>
+    <x:Double x:Key="PivotHeaderItemFontSize">24</x:Double>
+    <x:Double x:Key="PivotHeaderItemLockedTranslation">40</x:Double>
+    <x:Double x:Key="PivotTitleFontSize">14</x:Double>
+    <x:Int32 x:Key="PivotHeaderItemCharacterSpacing">-25</x:Int32>
+    <Thickness x:Key="PivotHeaderItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotLandscapeThemePadding">12,14,0,13</Thickness>
+    <Thickness x:Key="PivotNavButtonBorderThemeThickness">0</Thickness>
+    <Thickness x:Key="PivotNavButtonMargin">0,6,0,0</Thickness>
+    <Thickness x:Key="PivotPortraitThemePadding">12,14,0,13</Thickness>
+    <FontWeight x:Key="PivotHeaderItemThemeFontWeight">SemiLight</FontWeight>
+    <FontWeight x:Key="PivotTitleThemeFontWeight">Bold</FontWeight>
+    <StaticResource x:Key="PivotBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <!-- Resources for PivotItem -->
+    <StaticResource x:Key="PivotItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <!-- Resources for PivotHeaderItem -->
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelected" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselected" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotHeaderItemFocusPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <StaticResource x:Key="PivotHeaderItemSelectedPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <SolidColorBrush x:Key="PivotForegroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundSelectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundUnselectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundSelectedBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundUnselectedBrush" Color="#66FFFFFF" />
+    <SolidColorBrush x:Key="PivotNavButtonBackgroundThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonBorderThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonForegroundThemeBrush" Color="#99000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBackgroundThemeBrush" Color="#F0D7D7D7" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBorderThemeBrush" Color="#9EC1C1C1" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBackgroundThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBorderThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedForegroundThemeBrush" Color="#FFFFFFFF" />
   </Style.Resources>
 </Style>

src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml

@@ -366,8 +366,8 @@
     <x:Double x:Key="AutoCompleteBoxIconFontSize">12</x:Double>
 
     <!-- Resources for CheckBox.xaml -->
-    <x:Double x:Key="CheckBoxBorderThemeThickness">1</x:Double>
-    <x:Double x:Key="CheckBoxCheckedStrokeThickness">0</x:Double>
+    <Thickness x:Key="CheckBoxBorderThemeThickness">1</Thickness>
+    <Thickness x:Key="CheckBoxCheckedStrokeThickness">0</Thickness>
     <StaticResource x:Key="CheckBoxForegroundUnchecked" ResourceKey="SystemControlForegroundBaseHighBrush" />
     <StaticResource x:Key="CheckBoxForegroundUncheckedPointerOver" ResourceKey="SystemControlForegroundBaseHighBrush" />
     <StaticResource x:Key="CheckBoxForegroundUncheckedPressed" ResourceKey="SystemControlForegroundBaseHighBrush" />
@@ -655,5 +655,74 @@
     <SolidColorBrush x:Key="ToolTipBorderThemeBrush" Color="#FF808080" />
     <SolidColorBrush x:Key="ToolTipForegroundThemeBrush" Color="#FF666666" />
     <Thickness x:Key="ToolTipBorderThemePadding">8,5,8,7</Thickness>
+
+    <!-- Resources for Pivot.xaml -->
+    <FontFamily x:Key="PivotHeaderItemFontFamily">XamlAutoFontFamily</FontFamily>
+    <FontFamily x:Key="PivotTitleFontFamily">XamlAutoFontFamily</FontFamily>
+    <x:Double x:Key="PivotHeaderItemFontSize">24</x:Double>
+    <x:Double x:Key="PivotHeaderItemLockedTranslation">40</x:Double>
+    <x:Double x:Key="PivotTitleFontSize">14</x:Double>
+    <x:Int32 x:Key="PivotHeaderItemCharacterSpacing">-25</x:Int32>
+    <Thickness x:Key="PivotHeaderItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotItemMargin">12,0,12,0</Thickness>
+    <Thickness x:Key="PivotLandscapeThemePadding">12,14,0,13</Thickness>
+    <Thickness x:Key="PivotNavButtonBorderThemeThickness">0</Thickness>
+    <Thickness x:Key="PivotNavButtonMargin">0,6,0,0</Thickness>
+    <Thickness x:Key="PivotPortraitThemePadding">12,14,0,13</Thickness>
+    <FontWeight x:Key="PivotHeaderItemThemeFontWeight">SemiLight</FontWeight>
+    <FontWeight x:Key="PivotTitleThemeFontWeight">Bold</FontWeight>
+    <StaticResource x:Key="PivotBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotNextButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotNextButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotNextButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackground" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBackgroundPressed" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrush" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPointerOver" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonBorderBrushPressed" ResourceKey="SystemControlForegroundTransparentBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPointerOver" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <StaticResource x:Key="PivotPreviousButtonForegroundPressed" ResourceKey="SystemControlHighlightAltAltMediumHighBrush" />
+    <!-- Resources for PivotItem -->
+    <StaticResource x:Key="PivotItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <!-- Resources for PivotHeaderItem -->
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundUnselectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelected" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselected" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundUnselectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="PivotHeaderItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="PivotHeaderItemFocusPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <StaticResource x:Key="PivotHeaderItemSelectedPipeFill" ResourceKey="SystemControlHighlightAltAccentBrush" />
+    <SolidColorBrush x:Key="PivotForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundSelectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderBackgroundUnselectedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundSelectedBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotHeaderForegroundUnselectedBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="PivotNavButtonBackgroundThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonBorderThemeBrush" Color="#59D5D5D5" />
+    <SolidColorBrush x:Key="PivotNavButtonForegroundThemeBrush" Color="#99000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBackgroundThemeBrush" Color="#F0D7D7D7" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverBorderThemeBrush" Color="#9EC1C1C1" />
+    <SolidColorBrush x:Key="PivotNavButtonPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBackgroundThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedBorderThemeBrush" Color="#BD292929" />
+    <SolidColorBrush x:Key="PivotNavButtonPressedForegroundThemeBrush" Color="#FFFFFFFF" />
   </Style.Resources>
 </Style>

src/Avalonia.Themes.Fluent/TabControl.xaml

@@ -1,62 +1,61 @@
-<Styles xmlns="https://github.com/avaloniaui"  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <Style Selector="TabControl">        
-        <Setter Property="Template">
-            <ControlTemplate>
-                <Border
-                    Margin="{TemplateBinding Margin}"
-                    BorderBrush="{TemplateBinding BorderBrush}"
-                    BorderThickness="{TemplateBinding BorderThickness}"
-                    Background="{TemplateBinding Background}"
-                    HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
-                    VerticalAlignment="{TemplateBinding VerticalAlignment}">
-                    <DockPanel>
-                        <ItemsPresenter
-                            Name="PART_ItemsPresenter"
+<Styles xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <Design.PreviewWith>
+    <Border Width="400">
+      <TabControl>
+        <TabItem Header="Arch">
+          <Border Background="AntiqueWhite"
+                  Height="100">
+            <TextBlock Text="Content" Foreground="Black" FontSize="20"/>
+          </Border>
+        </TabItem>
+        <TabItem Header="Leaf">
+          <Border Background="Green"
+                  Height="100" />
+        </TabItem>
+        <TabItem Header="Disabled"
+                 IsEnabled="False" />
+      </TabControl>
+    </Border>
+  </Design.PreviewWith>
+
+  <Style Selector="TabControl">
+    <Setter Property="Margin" Value="0" />
+    <Setter Property="Padding" Value="{DynamicResource PivotItemMargin}" />
+    <Setter Property="Background" Value="{DynamicResource PivotBackground}" />
+    <Setter Property="Template">
+      <ControlTemplate>
+        <Border Margin="{TemplateBinding Margin}"
+                BorderBrush="{TemplateBinding BorderBrush}"
+                BorderThickness="{TemplateBinding BorderThickness}"
+                Background="{TemplateBinding Background}"
+                HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
+                VerticalAlignment="{TemplateBinding VerticalAlignment}">
+          <DockPanel>
+            <ItemsPresenter Name="PART_ItemsPresenter"
                             Items="{TemplateBinding Items}"
                             ItemsPanel="{TemplateBinding ItemsPanel}"
-                            ItemTemplate="{TemplateBinding ItemTemplate}">
-                        </ItemsPresenter>
-                        <ContentPresenter
-                            Name="PART_SelectedContentHost"
-                            Margin="{TemplateBinding Padding}"
-                            HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                            VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                            Content="{TemplateBinding SelectedContent}"
-                            ContentTemplate="{TemplateBinding SelectedContentTemplate}">
-                        </ContentPresenter>
-                    </DockPanel>
-                </Border>
-            </ControlTemplate>
-        </Setter>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Top]">
-        <Setter Property="Padding" Value="0 4 0 0"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Top] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Top"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Bottom] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Bottom"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Bottom]">
-        <Setter Property="Padding" Value="0 0 0 4"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Left] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Left"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Left] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
-        <Setter Property="Orientation" Value="Vertical"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Left]">
-        <Setter Property="Padding" Value="4 0 0 0"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Right] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Right"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Right] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
-        <Setter Property="Orientation" Value="Vertical"/>
-    </Style>
-    <Style Selector="TabControl[TabStripPlacement=Right]">
-        <Setter Property="Padding" Value="0 0 4 0"/>
-    </Style>
+                            ItemTemplate="{TemplateBinding ItemTemplate}"
+                            DockPanel.Dock="{TemplateBinding TabStripPlacement}"/>
+            <ContentPresenter Name="PART_SelectedContentHost"
+                              Margin="{TemplateBinding Padding}"
+                              HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                              VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                              Content="{TemplateBinding SelectedContent}"
+                              ContentTemplate="{TemplateBinding SelectedContentTemplate}" />
+          </DockPanel>
+        </Border>
+      </ControlTemplate>
+    </Setter>
+  </Style>
+
+  <Style Selector="TabControl[TabStripPlacement=Left] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
+    <Setter Property="Orientation" Value="Vertical" />
+  </Style>
+  <Style Selector="TabControl[TabStripPlacement=Right] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
+    <Setter Property="Orientation" Value="Vertical" />
+  </Style>
+  <Style Selector="TabControl[TabStripPlacement=Top] /template/ ItemsPresenter#PART_ItemsPresenter">
+    <Setter Property="Margin" Value="0 0 0 2" />
+  </Style>
 </Styles>

src/Avalonia.Themes.Fluent/TabItem.xaml

@@ -1,45 +1,130 @@
-<Styles xmlns="https://github.com/avaloniaui">
-    <Style Selector="TabItem">
-        <Setter Property="Background" Value="Transparent"/>
-        <Setter Property="FontSize" Value="{DynamicResource FontSizeLarge}"/>
-        <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundLightBrush}"/>
-        <Setter Property="HorizontalContentAlignment" Value="Left"/>
-        <Setter Property="Padding" Value="8"/>
-        <Setter Property="Template">
-            <ControlTemplate>
-                <ContentPresenter
-                    Name="PART_ContentPresenter"
-                    Background="{TemplateBinding Background}"
-                    BorderBrush="{TemplateBinding BorderBrush}"
-                    BorderThickness="{TemplateBinding BorderThickness}"
-                    ContentTemplate="{TemplateBinding HeaderTemplate}"
-                    Content="{TemplateBinding Header}"
-                    HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                    VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                    Margin="{TemplateBinding Margin}"
-                    Padding="{TemplateBinding Padding}"/>
-            </ControlTemplate>
-        </Setter>
-    </Style>
-    <Style Selector="TabItem:disabled">
-        <Setter Property="Opacity" Value="{DynamicResource ThemeDisabledOpacity}"/>
-    </Style>
-    <Style Selector="TabItem:pointerover">
-        <Setter Property="Background" Value="{DynamicResource ThemeControlHighlightMidBrush}"/>
-    </Style>
-    <Style Selector="TabItem:selected">
-        <Setter Property="Background" Value="{DynamicResource ThemeAccentBrush4}"/>
-    </Style>
-    <Style Selector="TabItem:selected:focus">
-        <Setter Property="Background" Value="{DynamicResource ThemeAccentBrush3}"/>
-    </Style>
-    <Style Selector="TabItem:selected:pointerover">
-        <Setter Property="Background" Value="{DynamicResource ThemeAccentBrush3}"/>
-    </Style>
-    <Style Selector="TabItem:selected:focus:pointerover">
-        <Setter Property="Background" Value="{DynamicResource ThemeAccentBrush2}"/>
-    </Style>
-    <Style Selector="TabItem[TabStripPlacement=Right]">
-        <Setter Property="HorizontalContentAlignment" Value="Right"/>
-    </Style>
+<Styles xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <Design.PreviewWith>
+    <Border Padding="20">
+      <StackPanel Spacing="20">
+        <TabItem Header="Leaf" />
+        <TabItem Header="Arch" IsSelected="True" />
+      </StackPanel>
+    </Border>
+  </Design.PreviewWith>
+  <Styles.Resources>
+    <x:Double x:Key="TabItemMinHeight">48</x:Double>
+    <x:Double x:Key="TabItemVerticalPipeHeight">24</x:Double>
+    <x:Double x:Key="TabItemPipeThickness">2</x:Double>
+  </Styles.Resources>
+
+  <Style Selector="TabItem">
+    <Setter Property="FontSize" Value="{DynamicResource PivotHeaderItemFontSize}" />
+    <Setter Property="FontWeight" Value="{DynamicResource PivotHeaderItemThemeFontWeight}" />
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselected}" />
+    <Setter Property="Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselected}" />
+    <Setter Property="Padding" Value="{DynamicResource PivotHeaderItemMargin}" />
+    <Setter Property="Margin" Value="0" />
+    <Setter Property="MinHeight" Value="{DynamicResource TabItemMinHeight}" />
+    <Setter Property="VerticalContentAlignment" Value="Center" />
+    <Setter Property="Template">
+      <ControlTemplate>
+        <Border Name="PART_LayoutRoot"
+                BorderBrush="{TemplateBinding BorderBrush}"
+                BorderThickness="{TemplateBinding BorderThickness}"
+                Padding="{TemplateBinding Padding}">
+          <Panel>
+            <ContentPresenter Name="PART_ContentPresenter"
+                              ContentTemplate="{TemplateBinding HeaderTemplate}"
+                              Content="{TemplateBinding Header}"
+                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                              TextBlock.FontFamily="{TemplateBinding FontFamily}"
+                              TextBlock.FontSize="{TemplateBinding FontSize}"
+                              TextBlock.FontWeight="{TemplateBinding FontWeight}" />
+            <Border Name="PART_SelectedPipe"
+                    CornerRadius="{DynamicResource ControlCornerRadius}"
+                    Background="{DynamicResource PivotHeaderItemSelectedPipeFill}" />
+          </Panel>
+        </Border>
+      </ControlTemplate>
+    </Setter>
+  </Style>
+
+  <!-- Nornal state -->
+  <Style Selector="TabItem /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{Binding $parent[TabItem].Background}" />
+  </Style>
+  <Style Selector="TabItem /template/ Border#PART_SelectedPipe">
+    <Setter Property="IsVisible" Value="False" />
+  </Style>
+
+  <!-- Selected state -->
+  <!--  We don't use selector to PART_LayoutRoot, so developer can override selected item background with TabStripItem.Background  -->
+  <Style Selector="TabItem:selected">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelected}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelected}" />
+  </Style>
+  <Style Selector="TabItem:selected /template/ Border#PART_SelectedPipe">
+    <Setter Property="IsVisible" Value="True" />
+  </Style>
+
+  <!-- PointerOver state -->
+  <Style Selector="TabItem:pointerover /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselectedPointerOver}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselectedPointerOver}" />
+  </Style>
+
+  <!-- Selected PointerOver state -->
+  <Style Selector="TabItem:selected:pointerover /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelectedPointerOver}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelectedPointerOver}" />
+  </Style>
+
+  <!-- Pressed state -->
+  <Style Selector="TabItem:pressed /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselectedPressed}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselectedPressed}" />
+  </Style>
+
+  <!-- Selected Pressed state -->
+  <Style Selector="TabItem:pressed /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelectedPressed}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelectedPressed}" />
+  </Style>
+
+  <!-- Disabled state -->
+  <Style Selector="TabItem:disabled /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundDisabled}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundDisabled}" />
+  </Style>
+
+  <!-- TabStripPlacement States Group -->
+  <Style Selector="TabItem[TabStripPlacement=Left] /template/ Border#PART_SelectedPipe">
+    <Setter Property="Width" Value="{StaticResource TabItemPipeThickness}" />
+    <Setter Property="Height" Value="{StaticResource TabItemVerticalPipeHeight}" />
+    <Setter Property="Margin" Value="0,0,2,0" />
+    <Setter Property="HorizontalAlignment" Value="Left" />
+    <Setter Property="VerticalAlignment" Value="Center" />
+  </Style>
+  <Style Selector="TabItem[TabStripPlacement=Left] /template/ ContentPresenter#PART_ContentPresenter">
+    <Setter Property="Margin" Value="8,0,0,0" />
+  </Style>
+
+  <Style Selector="TabItem[TabStripPlacement=Top] /template/ Border#PART_SelectedPipe, TabItem[TabStripPlacement=Bottom] /template/ Border#PART_SelectedPipe">
+    <Setter Property="Height" Value="{StaticResource TabItemPipeThickness}" />
+    <Setter Property="Margin" Value="0,0,0,2" />
+    <Setter Property="HorizontalAlignment" Value="Stretch" />
+    <Setter Property="VerticalAlignment" Value="Bottom" />
+  </Style>
+
+  <Style Selector="TabItem[TabStripPlacement=Right] /template/ Border#PART_SelectedPipe">
+    <Setter Property="Width" Value="{StaticResource TabItemPipeThickness}" />
+    <Setter Property="Height" Value="{StaticResource TabItemVerticalPipeHeight}" />
+    <Setter Property="Margin" Value="2,0,0,0" />
+    <Setter Property="HorizontalAlignment" Value="Right" />
+    <Setter Property="VerticalAlignment" Value="Center" />
+  </Style>
+  <Style Selector="TabItem[TabStripPlacement=Right] /template/ ContentPresenter#PART_ContentPresenter">
+    <Setter Property="Margin" Value="0,0,8,0" />
+  </Style>
+  <Style Selector="TabItem[TabStripPlacement=Right]">
+    <Setter Property="HorizontalContentAlignment" Value="Right" />
+  </Style>
 </Styles>

src/Avalonia.Themes.Fluent/TabStrip.xaml

@@ -1,11 +1,20 @@
 <Styles xmlns="https://github.com/avaloniaui">
+  <Design.PreviewWith>
+    <Border Padding="20">
+      <TabStrip>
+        <TabStripItem>Item 1</TabStripItem>
+        <TabStripItem>Item 2</TabStripItem>
+        <TabStripItem IsEnabled="False">Disabled</TabStripItem>
+      </TabStrip>
+    </Border>
+  </Design.PreviewWith>
   <Style Selector="TabStrip">
     <Setter Property="Template">
       <ControlTemplate>
         <ItemsPresenter Name="PART_ItemsPresenter"
                         Items="{TemplateBinding Items}"
                         ItemsPanel="{TemplateBinding ItemsPanel}"
-                        ItemTemplate="{TemplateBinding ItemTemplate}"/>
+                        ItemTemplate="{TemplateBinding ItemTemplate}" />
       </ControlTemplate>
     </Setter>
     <Setter Property="ItemsPanel">
@@ -14,7 +23,4 @@
       </ItemsPanelTemplate>
     </Setter>
   </Style>
-  <Style Selector="TabStrip > TabStripItem">
-    <Setter Property="Margin" Value="16"/>
-  </Style>
 </Styles>

src/Avalonia.Themes.Fluent/TabStripItem.xaml

@@ -1,23 +1,103 @@
-<Styles xmlns="https://github.com/avaloniaui">
+<Styles xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <Design.PreviewWith>
+    <Border Padding="20">
+      <StackPanel Spacing="20">
+        <TabStripItem>Leaf</TabStripItem>
+        <TabStripItem IsSelected="True">Arch</TabStripItem>
+      </StackPanel>
+    </Border>
+  </Design.PreviewWith>
+  <Styles.Resources>
+    <x:Double x:Key="TabStripItemMinHeight">48</x:Double>
+    <x:Double x:Key="TabStripItemPipeThickness">2</x:Double>
+  </Styles.Resources>
+
   <Style Selector="TabStripItem">
-    <Setter Property="Background" Value="Transparent"/>
-    <Setter Property="FontSize" Value="{DynamicResource FontSizeLarge}"/>
-    <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundLowBrush}"/>
+    <Setter Property="FontSize" Value="{DynamicResource PivotHeaderItemFontSize}" />
+    <Setter Property="FontWeight" Value="{DynamicResource PivotHeaderItemThemeFontWeight}" />
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselected}" />
+    <Setter Property="Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselected}" />
+    <Setter Property="Padding" Value="{DynamicResource PivotHeaderItemMargin}" />
+    <Setter Property="Margin" Value="0" />
+    <Setter Property="MinHeight" Value="{DynamicResource TabStripItemMinHeight}" />
+    <Setter Property="VerticalContentAlignment" Value="Center" />
     <Setter Property="Template">
       <ControlTemplate>
-        <ContentPresenter Name="PART_ContentPresenter"
-                          Background="{TemplateBinding Background}"
-                          BorderBrush="{TemplateBinding BorderBrush}"
-                          BorderThickness="{TemplateBinding BorderThickness}"
-                          ContentTemplate="{TemplateBinding ContentTemplate}"
-                          Content="{TemplateBinding Content}"
-                          HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                          VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                          Padding="{TemplateBinding Padding}"/>
+        <Border Name="PART_LayoutRoot"
+                BorderBrush="{TemplateBinding BorderBrush}"
+                BorderThickness="{TemplateBinding BorderThickness}"
+                Padding="{TemplateBinding Padding}">
+          <Panel>
+            <ContentPresenter Name="PART_ContentPresenter"
+                              ContentTemplate="{TemplateBinding ContentTemplate}"
+                              Content="{TemplateBinding Content}"
+                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                              TextBlock.FontFamily="{TemplateBinding FontFamily}"
+                              TextBlock.FontSize="{TemplateBinding FontSize}"
+                              TextBlock.FontWeight="{TemplateBinding FontWeight}" />
+            <Border Name="PART_SelectedPipe"
+                    CornerRadius="{DynamicResource ControlCornerRadius}"
+                    Background="{DynamicResource PivotHeaderItemSelectedPipeFill}" />
+          </Panel>
+        </Border>
       </ControlTemplate>
     </Setter>
   </Style>
+
+
+  <!--  Nornal state  -->
+  <Style Selector="TabStripItem /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{Binding $parent[TabStripItem].Background}" />
+  </Style>
+  <Style Selector="TabStripItem /template/ Border#PART_SelectedPipe">
+    <Setter Property="IsVisible" Value="False" />
+  </Style>
+  <Style Selector="TabStripItem /template/ Border#PART_SelectedPipe, TabItem[TabStripPlacement=Bottom] /template/ Border#PART_SelectedPipe">
+    <Setter Property="Height" Value="{StaticResource TabStripItemPipeThickness}" />
+    <Setter Property="Margin" Value="0,0,0,2" />
+    <Setter Property="HorizontalAlignment" Value="Stretch" />
+    <Setter Property="VerticalAlignment" Value="Bottom" />
+  </Style>
+
+  <!--  Selected state  -->
+  <!--  We don't use selector to PART_LayoutRoot, so developer can override selected item background with TabStripItem.Background  -->
   <Style Selector="TabStripItem:selected">
-    <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundBrush}"/>
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelected}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelected}" />
+  </Style>
+  <Style Selector="TabStripItem:selected /template/ Border#PART_SelectedPipe">
+    <Setter Property="IsVisible" Value="True" />
+  </Style>
+
+  <!--  PointerOver state  -->
+  <Style Selector="TabStripItem:pointerover /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselectedPointerOver}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselectedPointerOver}" />
+  </Style>
+
+  <!--  Selected PointerOver state  -->
+  <Style Selector="TabStripItem:selected:pointerover /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelectedPointerOver}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelectedPointerOver}" />
+  </Style>
+
+  <!--  Pressed state  -->
+  <Style Selector="TabStripItem:pressed /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundUnselectedPressed}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundUnselectedPressed}" />
+  </Style>
+
+  <!--  Selected Pressed state  -->
+  <Style Selector="TabStripItem:pressed /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundSelectedPressed}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundSelectedPressed}" />
+  </Style>
+
+  <!--  Disabled state  -->
+  <Style Selector="TabStripItem:disabled /template/ Border#PART_LayoutRoot">
+    <Setter Property="Background" Value="{DynamicResource PivotHeaderItemBackgroundDisabled}" />
+    <Setter Property="TextBlock.Foreground" Value="{DynamicResource PivotHeaderItemForegroundDisabled}" />
   </Style>
-</Styles>
+</Styles>