WPF-ListBox樣式大解析
阿新 • • 發佈：2019-01-14
本文很長，沒有耐心，想直接複製的就別看了。（因為確實沒有東西可以複製，這裡都是“漁”，沒有魚）
ListBox繼承自ItemsControl，加入了一個selector物件，可以提供選擇（單選、多選功能）。是和顯示一個一個的物件。比如檔案管理器。
ListView是Listbox上面加入了一個View物件，一般跟GirdView連用，適合顯示一條一條的、每一條分好幾個欄目的物件。比如百度雲的下載管理器。
這裡寫的是ListBox。
在Blend軟體（或者VisualStudio）中為Listbox建立模板副本：
<SolidColorBrush x:Key="ListBox.Static.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ListBox.Static.Border" Color="#FFABADB3"/> <SolidColorBrush x:Key="ListBox.Disabled.Background" Color="#FFFFFFFF"/> <SolidColorBrush x:Key="ListBox.Disabled.Border" Color="#FFD9D9D9"/> <Style x:Key="ListBoxStyle1" TargetType="{x:Type ListBox}"> <Setter Property="Background" Value="{StaticResource ListBox.Static.Background}"/> <Setter Property="BorderBrush" Value="{StaticResource ListBox.Static.Border}"/> <Setter Property="BorderThickness" 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.CanContentScroll" Value="true"/> <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 ListBox}"> <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="1" SnapsToDevicePixels="true"> <ScrollViewer Focusable="false" Padding="{TemplateBinding Padding}"> <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </ScrollViewer> </Border> <ControlTemplate.Triggers> <Trigger Property="IsEnabled" Value="false"> <Setter Property="Background" TargetName="Bd" Value="{StaticResource ListBox.Disabled.Background}"/> <Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource ListBox.Disabled.Border}"/> </Trigger> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="IsGrouping" Value="true"/> <Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false"/> </MultiTrigger.Conditions> <Setter Property="ScrollViewer.CanContentScroll" Value="false"/> </MultiTrigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
可見，ListBox是一個border裡面巢狀一個ScrollViewer。
在WPF當中，預先設定了兩個可以滾動的元素。ScrollBar和ScrollViewer。ScrollView內嵌了橫向和縱向的兩個ScrollVar，還內嵌了一個Content Container，用來在可以滑動的區域顯示其他的東西。所以說，ScrollView是一個封裝ScrollBar功能的複合控制元件。一般不會單獨使用ScrllViewer，但是非要這麼用也行。單獨使用ScrollViewer的時候，是直接可以看到滾動條的：
但是使用ListBox時，元素數量不夠的時候就看不到滾動條：
為了能夠自定義Listbox樣式，先把Listbox改成ListViewer，同樣用Blend（或者VisualStudio）建立副本，看到一下程式碼：
<ControlTemplate x:Key="ScrollViewerControlTemplate1" TargetType="{x:Type ScrollViewer}"> <Grid x:Name="Grid" Background="{TemplateBinding Background}"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="*"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <Rectangle x:Name="Corner" Grid.Column="1" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" Grid.Row="1"/> <ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}" CanHorizontallyScroll="False" CanVerticallyScroll="False" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" Grid.Column="0" Margin="{TemplateBinding Padding}" Grid.Row="0"/> <ScrollBar x:Name="PART_VerticalScrollBar" AutomationProperties.AutomationId="VerticalScrollBar" Cursor="Arrow" Grid.Column="1" Maximum="{TemplateBinding ScrollableHeight}" Minimum="0" Grid.Row="0" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportHeight}"/> <ScrollBar x:Name="PART_HorizontalScrollBar" AutomationProperties.AutomationId="HorizontalScrollBar" Cursor="Arrow" Grid.Column="0" Maximum="{TemplateBinding ScrollableWidth}" Minimum="0" Orientation="Horizontal" Grid.Row="1" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportWidth}"/> </Grid> </ControlTemplate>
可見，一個ScrollViewer是一個grid被分成了四行四列：
Row=0、Col=0是內容區域；Row=0、Col=1是縱向的滾輪；Row=1、Col=0是橫向滾輪，預設情況下是不可見的，能出現上面這個圖是因為把上面程式碼中 PART_HorizontalScrollBar 的visibility手動設定成了visible，這樣看起來直觀一點；Row=1、Col=1這塊區域被微軟很形象的命名成了Corner。
OK，到這兒發現，想要自定義Listbox的樣式，得先解決自定義ScrollBar，因為這個自帶的Bar實在是太！醜！了！
OK，同樣的套路，我們直接在windows裡面隨便建一個scrollbar：
<ScrollBar>
</ScrollBar>
嗯...很真實好吧，確實是一個奇醜無比的scrollbar。同樣為其建立模板：
<SolidColorBrush x:Key="ScrollBar.Static.Background" Color="#F0F0F0"/>
<SolidColorBrush x:Key="ScrollBar.Static.Border" Color="#F0F0F0"/>
<SolidColorBrush x:Key="ScrollBar.Pressed.Glyph" Color="#FFFFFF"/>
<SolidColorBrush x:Key="ScrollBar.MouseOver.Glyph" Color="#000000"/>
<SolidColorBrush x:Key="ScrollBar.Disabled.Glyph" Color="#BFBFBF"/>
<SolidColorBrush x:Key="ScrollBar.Static.Glyph" Color="#606060"/>
<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="ScrollBar.MouseOver.Background" Color="#DADADA"/>
<SolidColorBrush x:Key="ScrollBar.MouseOver.Border" Color="#DADADA"/>
<SolidColorBrush x:Key="ScrollBar.Pressed.Background" Color="#606060"/>
<SolidColorBrush x:Key="ScrollBar.Pressed.Border" Color="#606060"/>
<SolidColorBrush x:Key="ScrollBar.Disabled.Background" Color="#F0F0F0"/>
<SolidColorBrush x:Key="ScrollBar.Disabled.Border" Color="#F0F0F0"/>
<Style x:Key="ScrollBarButton" TargetType="{x:Type RepeatButton}">
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Border x:Name="border" BorderBrush="{StaticResource ScrollBar.Static.Border}" BorderThickness="1" Background="{StaticResource ScrollBar.Static.Background}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.Pressed.Border}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Opacity" TargetName="contentPresenter" Value="0.56"/>
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.Disabled.Border}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="RepeatButtonTransparent" TargetType="{x:Type RepeatButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Rectangle Fill="{TemplateBinding Background}" Height="{TemplateBinding Height}" Width="{TemplateBinding Width}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="ScrollBar.MouseOver.Thumb" Color="#A6A6A6"/>
<SolidColorBrush x:Key="ScrollBar.Pressed.Thumb" Color="#606060"/>
<SolidColorBrush x:Key="ScrollBar.Static.Thumb" Color="#CDCDCD"/>
<Style x:Key="ScrollBarThumbVertical" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Rectangle x:Name="rectangle" Fill="{StaticResource ScrollBar.Static.Thumb}" Height="{TemplateBinding Height}" SnapsToDevicePixels="True" Width="{TemplateBinding Width}"/>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.MouseOver.Thumb}"/>
</Trigger>
<Trigger Property="IsDragging" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.Pressed.Thumb}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ScrollBarThumbHorizontal" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Rectangle x:Name="rectangle" Fill="{StaticResource ScrollBar.Static.Thumb}" Height="{TemplateBinding Height}" SnapsToDevicePixels="True" Width="{TemplateBinding Width}"/>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.MouseOver.Thumb}"/>
</Trigger>
<Trigger Property="IsDragging" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.Pressed.Thumb}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ScrollBarStyle1" TargetType="{x:Type ScrollBar}">
<Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="false"/>
<Setter Property="Background" Value="{StaticResource ScrollBar.Static.Background}"/>
<Setter Property="BorderBrush" Value="{StaticResource ScrollBar.Static.Border}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="BorderThickness" Value="1,0"/>
<Setter Property="Width" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="MinWidth" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.RowDefinitions>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
<RowDefinition Height="0.00001*"/>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
</Grid.RowDefinitions>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Row="1"/>
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowTop" Data="M 0,4 C0,4 0,6 0,6 0,6 3.5,2.5 3.5,2.5 3.5,2.5 7,6 7,6 7,6 7,4 7,4 7,4 3.5,0.5 3.5,0.5 3.5,0.5 0,4 0,4 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
<Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="1">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumbVertical}"/>
</Track.Thumb>
</Track>
<RepeatButton x:Name="PART_LineDownButton" Command="{x:Static ScrollBar.LineDownCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="2" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowBottom" Data="M 0,2.5 C0,2.5 0,0.5 0,0.5 0,0.5 3.5,4 3.5,4 3.5,4 7,0.5 7,0.5 7,0.5 7,2.5 7,2.5 7,2.5 3.5,6 3.5,6 3.5,6 0,2.5 0,2.5 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineDownButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineDownButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineUpButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineUpButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineDownButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineDownButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineUpButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineUpButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Orientation" Value="Horizontal">
<Setter Property="Width" Value="Auto"/>
<Setter Property="MinWidth" Value="0"/>
<Setter Property="Height" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="MinHeight" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="BorderThickness" Value="0,1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.ColumnDefinitions>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
<ColumnDefinition Width="0.00001*"/>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
</Grid.ColumnDefinitions>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1"/>
<RepeatButton x:Name="PART_LineLeftButton" Command="{x:Static ScrollBar.LineLeftCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowLeft" Data="M 3.18,7 C3.18,7 5,7 5,7 5,7 1.81,3.5 1.81,3.5 1.81,3.5 5,0 5,0 5,0 3.18,0 3.18,0 3.18,0 0,3.5 0,3.5 0,3.5 3.18,7 3.18,7 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3" Stretch="Uniform"/>
</RepeatButton>
<Track x:Name="PART_Track" Grid.Column="1" IsEnabled="{TemplateBinding IsMouseOver}">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageLeftCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageRightCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumbHorizontal}"/>
</Track.Thumb>
</Track>
<RepeatButton x:Name="PART_LineRightButton" Grid.Column="2" Command="{x:Static ScrollBar.LineRightCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowRight" Data="M 1.81,7 C1.81,7 0,7 0,7 0,7 3.18,3.5 3.18,3.5 3.18,3.5 0,0 0,0 0,0 1.81,0 1.81,0 1.81,0 5,3.5 5,3.5 5,3.5 1.81,7 1.81,7 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3" Stretch="Uniform"/>
</RepeatButton>
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineRightButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineRightButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineLeftButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineLeftButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineRightButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineRightButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineLeftButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineLeftButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>我靠！這麼醜的玩意兒為什麼要包含這麼多程式碼！還真是Bar不可貌相。 =_=||
不要怕，慢慢看：
先找TargetType是ScrollBar的style：
<Style x:Key="ScrollBarStyle1" TargetType="{x:Type ScrollBar}">
<Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="false"/>
<Setter Property="Background" Value="{StaticResource ScrollBar.Static.Background}"/>
<Setter Property="BorderBrush" Value="{StaticResource ScrollBar.Static.Border}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="BorderThickness" Value="1,0"/>
<Setter Property="Width" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="MinWidth" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.RowDefinitions>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
<RowDefinition Height="0.00001*"/>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
</Grid.RowDefinitions>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Row="1"/>
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowTop" Data="M 0,4 C0,4 0,6 0,6 0,6 3.5,2.5 3.5,2.5 3.5,2.5 7,6 7,6 7,6 7,4 7,4 7,4 3.5,0.5 3.5,0.5 3.5,0.5 0,4 0,4 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
<Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="1">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumbVertical}"/>
</Track.Thumb>
</Track>
<RepeatButton x:Name="PART_LineDownButton" Command="{x:Static ScrollBar.LineDownCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="2" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowBottom" Data="M 0,2.5 C0,2.5 0,0.5 0,0.5 0,0.5 3.5,4 3.5,4 3.5,4 7,0.5 7,0.5 7,0.5 7,2.5 7,2.5 7,2.5 3.5,6 3.5,6 3.5,6 0,2.5 0,2.5 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineDownButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineDownButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineUpButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineUpButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineDownButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineDownButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineUpButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineUpButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="ArrowTop" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
<Setter Property="Fill" TargetName="ArrowBottom" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Orientation" Value="Horizontal">
<Setter Property="Width" Value="Auto"/>
<Setter Property="MinWidth" Value="0"/>
<Setter Property="Height" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="MinHeight" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="BorderThickness" Value="0,1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.ColumnDefinitions>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
<ColumnDefinition Width="0.00001*"/>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
</Grid.ColumnDefinitions>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1"/>
<RepeatButton x:Name="PART_LineLeftButton" Command="{x:Static ScrollBar.LineLeftCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowLeft" Data="M 3.18,7 C3.18,7 5,7 5,7 5,7 1.81,3.5 1.81,3.5 1.81,3.5 5,0 5,0 5,0 3.18,0 3.18,0 3.18,0 0,3.5 0,3.5 0,3.5 3.18,7 3.18,7 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3" Stretch="Uniform"/>
</RepeatButton>
<Track x:Name="PART_Track" Grid.Column="1" IsEnabled="{TemplateBinding IsMouseOver}">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageLeftCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageRightCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumbHorizontal}"/>
</Track.Thumb>
</Track>
<RepeatButton x:Name="PART_LineRightButton" Grid.Column="2" Command="{x:Static ScrollBar.LineRightCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowRight" Data="M 1.81,7 C1.81,7 0,7 0,7 0,7 3.18,3.5 3.18,3.5 3.18,3.5 0,0 0,0 0,0 1.81,0 1.81,0 1.81,0 5,3.5 5,3.5 5,3.5 1.81,7 1.81,7 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3" Stretch="Uniform"/>
</RepeatButton>
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineRightButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineRightButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineLeftButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineLeftButton}" Value="true"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.Pressed.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineRightButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineRightButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, ElementName=PART_LineLeftButton}" Value="true"/>
<Condition Binding="{Binding IsPressed, ElementName=PART_LineLeftButton}" Value="false"/>
</MultiDataTrigger.Conditions>
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.MouseOver.Glyph}"/>
</MultiDataTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="ArrowLeft" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
<Setter Property="Fill" TargetName="ArrowRight" Value="{StaticResource ScrollBar.Disabled.Glyph}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>有點長...只看佈局，不開Triigers的話：
<Grid x:Name="Bg" SnapsToDevicePixels="true">
<Grid.RowDefinitions>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
<RowDefinition Height="0.00001*"/>
<RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
</Grid.RowDefinitions>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Row="1"/>
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowTop" Data="M 0,4 C0,4 0,6 0,6 0,6 3.5,2.5 3.5,2.5 3.5,2.5 7,6 7,6 7,6 7,4 7,4 7,4 3.5,0.5 3.5,0.5 3.5,0.5 0,4 0,4 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
<Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="1">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumbVertical}"/>
</Track.Thumb>
</Track>
<RepeatButton x:Name="PART_LineDownButton" Command="{x:Static ScrollBar.LineDownCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Grid.Row="2" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowBottom" Data="M 0,2.5 C0,2.5 0,0.5 0,0.5 0,0.5 3.5,4 3.5,4 3.5,4 7,0.5 7,0.5 7,0.5 7,2.5 7,2.5 7,2.5 3.5,6 3.5,6 3.5,6 0,2.5 0,2.5 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>
</Grid>很明顯，一個Bar被分成了三行。猜也猜的出來：上下兩個button，中間一個滾動條。
先看Button，這裡是Button的一種：RepeatButton，直接看他的Style：
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">去上面找這個Style：
<Style x:Key="ScrollBarButton" TargetType="{x:Type RepeatButton}">
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Border x:Name="border" BorderBrush="{StaticResource ScrollBar.Static.Border}" BorderThickness="1" Background="{StaticResource ScrollBar.Static.Background}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.Pressed.Border}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Opacity" TargetName="contentPresenter" Value="0.56"/>
<Setter Property="Background" TargetName="border" Value="{StaticResource ScrollBar.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource ScrollBar.Disabled.Border}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>也他媽好長...只看佈局：
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Border x:Name="border" BorderBrush="{StaticResource ScrollBar.Static.Border}" BorderThickness="1" Background="{StaticResource ScrollBar.Static.Background}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
balabala
</ControlTemplate.Triggers>
</ControlTemplate>也就是說是一個Boder加上一個ContentPresenter，
再回到ScrollBar的Style：
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Path x:Name="ArrowTop" Data="M 0,4 C0,4 0,6 0,6 0,6 3.5,2.5 3.5,2.5 3.5,2.5 7,6 7,6 7,6 7,4 7,4 7,4 3.5,0.5 3.5,0.5 3.5,0.5 0,4 0,4 z" Fill="{StaticResource ScrollBar.Static.Glyph}" Margin="3,4,3,3" Stretch="Uniform"/>
</RepeatButton>這個Path就是ContentPresenter，也就是那個三角。試驗一下，吧Path換成一個Image：
<RepeatButton x:Name="PART_LineUpButton" Command="{x:Static ScrollBar.LineUpCommand}" IsEnabled="{TemplateBinding IsMouseOver}" Style="{StaticResource ScrollBarButton}">
<Image x:Name="ArrowTop" Source="C:\Users\ZezhiShao\Downloads\BasketBall.png"/>
</RepeatButton>
下面那個RepeatButton是完全一樣的。
最後就剩下這個Track了：
上面是Track的官方文件：
很明顯，Track自己又被方程了兩個RepeatButton和Thumb。我們先看開你這兩個RepeatButton：他們都是RepeatButtonTransparent樣式。這裡就不去仔細看這個樣式了，最終的效果就是幾乎透明的，我們可以隨心所欲地再去更改了。
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageUpCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static ScrollBar.PageDownCommand}" Style="{StaticResource RepeatButtonTransparent}"/>
</Track.IncreaseRepeatButton>最後再看Thumb，它的Style是 ：
<Style x:Key="ScrollBarThumbVertical" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Rectangle x:Name="rectangle" Fill="{StaticResource ScrollBar.Static.Thumb}" Height="{TemplateBinding Height}" SnapsToDevicePixels="True" Width="{TemplateBinding Width}"/>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.MouseOver.Thumb}"/>
</Trigger>
<Trigger Property="IsDragging" Value="true">
<Setter Property="Fill" TargetName="rectangle" Value="{StaticResource ScrollBar.Pressed.Thumb}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>其實就是一個Rectangle。
至此，所有的Listbox的樣式全部解析完成（不包括觸發器）：
看起來很簡單的ListBox其實是一個高度封裝好的控制元件，但是其本質還是一些底層的控制元件，只要能內心的一步一步去解構，很快就能明白。明白了ListBox的樣式之後，自定義一些樣子的ListBox就變得簡單了。
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