一、前言
程序中经常会用到TabControl控件，默认的控件样式很普通。而且样式或功能不一定符合我们的要求。比如：我们需要TabControl的标题能够居中、或平均分布；或者我们希望TabControl的标题能够进行关闭。要实现这些功能我们需要对TabControl的样式进行定义。
二、实现TabControl的标题平均分布
默认的TabControl标题是使用TabPanel容器包含的。要想实现TabControl标题头平均分布，需要把TabPanel替换成UniformGrid；
替换后的TabControl样式如下：
<Style x:Key="TabControlStyle" TargetType="{x:Type TabControl}">
<Setter Property="Padding" Value="2"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Background" Value="White"/>
<Setter Property="BorderBrush" Value="#FFACACAC"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabControl}">
<Grid x:Name="templateRoot" ClipToBounds="True" SnapsToDevicePixels="True" KeyboardNavigation.TabNavigation="Local">
<Grid.ColumnDefinitions>
<ColumnDefinition x:Name="ColumnDefinition0"/>
<ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition x:Name="RowDefinition0" Height="Auto"/>
<RowDefinition x:Name="RowDefinition1" Height="*"/>
</Grid.RowDefinitions>
<UniformGrid x:Name="HeaderPanel" Rows="1" Background="Transparent" Grid.Column="0" IsItemsHost="True" Margin="0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>
<Line X1="0" X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}" Stroke="White" StrokeThickness="0.1" VerticalAlignment="Bottom" Margin="0 0 0 1" SnapsToDevicePixels="True"/>
<Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
<ContentPresenter x:Name="PART_SelectedContentHost" ContentTemplate="{TemplateBinding SelectedContentTemplate}" Content="{TemplateBinding SelectedContent}" ContentStringFormat="{TemplateBinding SelectedContentStringFormat}" ContentSource="SelectedContent" Margin="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Left">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Right">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
即使这样设置了，TabControl的标题还是很丑，这个时候就需要通过设置TabItem来更改标题样式了。
TabItem样式如下：
<Style x:Key="TabItemStyle" TargetType="{x:Type TabItem}">
<Setter Property="Foreground" Value="White"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="#FFACACAC"/>
<Setter Property="Margin" Value="0"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid x:Name="templateRoot" SnapsToDevicePixels="True" Background="Transparent">
<TextBlock x:Name="txt" Visibility="Visible" VerticalAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" ToolTip="{TemplateBinding Header}" Foreground="{TemplateBinding Foreground}" TextTrimming="CharacterEllipsis" />
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" TargetName="txt" Value="#fffea1"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Left"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Bottom"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Right"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Panel.ZIndex" Value="1"/>
<Setter Property="Foreground" TargetName="txt" Value="#fffea1"/>
</MultiDataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
至此，样式已经设置完毕，引用示例：
<Grid Background="#858586">
<TabControl Style="{StaticResource TabControlStyle}" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">
<TabItem Style="{StaticResource TabItemStyle}" Cursor="Hand" Header="音乐电台" Height="38" >
<Grid Background="#33ffffff">
<TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</TabItem>
<TabItem Style="{StaticResource TabItemStyle}" Cursor="Hand" Header="Mv电台" Height="38" >
<Grid Background="#33ffffff">
<TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</TabItem>
</TabControl>
</Grid>
效果如下：
三、实现TabControl标题居中显示（不平均分布）
同理需要更改TabControl的样式和TabItem的样式。需要把使用TabPanel作为标题的容器，设置HorizontalAlignment为Center；
TabControl的样式如下：
<Style x:Key="TabControlWithUnderLineStyle" TargetType="{x:Type TabControl}">
<Setter Property="Padding" Value="2"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Background" Value="White"/>
<Setter Property="BorderBrush" Value="#FFACACAC"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabControl}">
<Grid x:Name="templateRoot" ClipToBounds="True" SnapsToDevicePixels="True" KeyboardNavigation.TabNavigation="Local">
<Grid.ColumnDefinitions>
<ColumnDefinition x:Name="ColumnDefinition0"/>
<ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition x:Name="RowDefinition0" Height="Auto"/>
<RowDefinition x:Name="RowDefinition1" Height="*"/>
</Grid.RowDefinitions>
<TabPanel x:Name="HeaderPanel" HorizontalAlignment="Center" Background="Transparent" Grid.Column="0" IsItemsHost="True" Margin="0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>
<Line X1="0" X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}" Stroke="Gray" StrokeThickness="0.1" VerticalAlignment="Bottom" Margin="0 0 0 1" SnapsToDevicePixels="True"/>
<Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
<ContentPresenter x:Name="PART_SelectedContentHost" ContentTemplate="{TemplateBinding SelectedContentTemplate}" Content="{TemplateBinding SelectedContent}" ContentStringFormat="{TemplateBinding SelectedContentStringFormat}" ContentSource="SelectedContent" Margin="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Left">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Right">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
TabItem样式如下：
<Style x:Key="TabItemExWithUnderLineStyle" TargetType="{x:Type TabItem}">
<Setter Property="Foreground" Value="White"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="#FFACACAC"/>
<Setter Property="Margin" Value="0"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid x:Name="templateRoot" SnapsToDevicePixels="True" Background="Transparent">
<Border x:Name="_underline" BorderBrush="#37aefe" BorderThickness="0" Margin="{TemplateBinding Margin}"/>
<Grid>
<TextBlock x:Name="txt" Visibility="Visible" VerticalAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" ToolTip="{TemplateBinding Header}" Foreground="{TemplateBinding Foreground}" TextTrimming="CharacterEllipsis" />
</Grid>
</Grid>
<ControlTemplate.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" TargetName="txt" Value="#37aefe"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Left"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Bottom"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Right"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsEnabled, RelativeSource={RelativeSource Self}}" Value="false"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" TargetName="templateRoot" Value="0.56"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding TabStripPlacement, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type TabControl}}}" Value="Top"/>
</MultiDataTrigger.Conditions>
<Setter Property="Panel.ZIndex" Value="1"/>
<Setter Property="Foreground" TargetName="txt" Value="#37aefe"/>
<Setter Property="BorderThickness" TargetName="_underline" Value="0 0 0 2"/>
</MultiDataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
引用示例：
<Grid Background="#858586">
<TabControl Style="{StaticResource TabControlWithUnderLineStyle}" Foreground="Black" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">
<TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Cursor="Hand" Header="音乐电台" Height="38" Width="70" Margin="5 0">
<Grid Background="#33ffffff">
<TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</TabItem>
<TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Cursor="Hand" Header="Mv电台" Height="38" Width="70" Margin="5 0">
<Grid Background="#33ffffff">
<TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</TabItem>
</TabControl>
</Grid>
效果如下：
四、带关闭按钮的TabControl
带关闭按钮的TabControl其实就是就是扩展TabItem，需要新建WPF自定义控件，命名为TabItemClose吧；
C#代码如下：
public class TabItemClose : TabItem
{
static TabItemClose()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TabItemClose), new FrameworkPropertyMetadata(typeof(TabItemClose)));
}
private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
d.SetValue(e.Property, e.NewValue);
}
/// <summary>
/// 是否可以关闭
/// </summary>
public bool IsCanClose
{
get { return (bool)GetValue(IsCanCloseProperty); }
set { SetValue(IsCanCloseProperty, value); }
}
public static readonly DependencyProperty IsCanCloseProperty =
DependencyProperty.Register("IsCanClose", typeof(bool), typeof(TabItemClose), new PropertyMetadata(true, OnPropertyChanged));
/// <summary>
/// 关闭的图标
/// </summary>
public ImageSource CloseIcon
{
get { return (ImageSource)GetValue(CloseIconProperty); }
set { SetValue(CloseIconProperty, value); }
}
public static readonly DependencyProperty CloseIconProperty =
DependencyProperty.Register("CloseIcon", typeof(ImageSource), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 正常背景色
/// </summary>
public SolidColorBrush NormalBackground
{
get { return (SolidColorBrush)GetValue(NormalBackgroundProperty); }
set { SetValue(NormalBackgroundProperty, value); }
}
public static readonly DependencyProperty NormalBackgroundProperty =
DependencyProperty.Register("NormalBackground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 悬浮背景色
/// </summary>
public SolidColorBrush OverBackgound
{
get { return (SolidColorBrush)GetValue(OverBackgoundProperty); }
set { SetValue(OverBackgoundProperty, value); }
}
public static readonly DependencyProperty OverBackgoundProperty =
DependencyProperty.Register("OverBackgound", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 选中背景色
/// </summary>
public SolidColorBrush SelectedBackgound
{
get { return (SolidColorBrush)GetValue(SelectedBackgoundProperty); }
set { SetValue(SelectedBackgoundProperty, value); }
}
public static readonly DependencyProperty SelectedBackgoundProperty =
DependencyProperty.Register("SelectedBackgound", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 默认前景色
/// </summary>
public SolidColorBrush NormalForeground
{
get { return (SolidColorBrush)GetValue(NormalForegroundProperty); }
set { SetValue(NormalForegroundProperty, value); }
}
public static readonly DependencyProperty NormalForegroundProperty =
DependencyProperty.Register("NormalForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 悬浮前景色
/// </summary>
public SolidColorBrush OverForeground
{
get { return (SolidColorBrush)GetValue(OverForegroundProperty); }
set { SetValue(OverForegroundProperty, value); }
}
public static readonly DependencyProperty OverForegroundProperty =
DependencyProperty.Register("OverForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 选中前景色
/// </summary>
public SolidColorBrush SelectedForeground
{
get { return (SolidColorBrush)GetValue(SelectedForegroundProperty); }
set { SetValue(SelectedForegroundProperty, value); }
}
public static readonly DependencyProperty SelectedForegroundProperty =
DependencyProperty.Register("SelectedForeground", typeof(SolidColorBrush), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 控件圆角
/// </summary>
public CornerRadius CornerRadius
{
get { return (CornerRadius)GetValue(CornerRadiusProperty); }
set { SetValue(CornerRadiusProperty, value); }
}
public static readonly DependencyProperty CornerRadiusProperty =
DependencyProperty.Register("CornerRadius", typeof(CornerRadius), typeof(TabItemClose), new PropertyMetadata(new CornerRadius(0), OnPropertyChanged));
/// <summary>
/// 前置Logo
/// </summary>
public ImageSource LogoIcon
{
get { return (ImageSource)GetValue(LogoIconProperty); }
set { SetValue(LogoIconProperty, value); }
}
public static readonly DependencyProperty LogoIconProperty =
DependencyProperty.Register("LogoIcon", typeof(ImageSource), typeof(TabItemClose), new PropertyMetadata(null, OnPropertyChanged));
/// <summary>
/// 前置Logo宽度
/// </summary>
public double LogoIconWidth
{
get { return (double)GetValue(LogoIconWidthProperty); }
set { SetValue(LogoIconWidthProperty, value); }
}
public static readonly DependencyProperty LogoIconWidthProperty =
DependencyProperty.Register("LogoIconWidth", typeof(double), typeof(TabItemClose), new PropertyMetadata(double.Parse("0"), OnPropertyChanged));
/// <summary>
/// 前置Logo高度
/// </summary>
public double LogoIconHeigth
{
get { return (double)GetValue(LogoIconHeigthProperty); }
set { SetValue(LogoIconHeigthProperty, value); }
}
public static readonly DependencyProperty LogoIconHeigthProperty =
DependencyProperty.Register("LogoIconHeigth", typeof(double), typeof(TabItemClose), new PropertyMetadata(double.Parse("0"), OnPropertyChanged));
/// <summary>
/// LogoPadding
/// </summary>
public Thickness LogoPadding
{
get { return (Thickness)GetValue(LogoPaddingProperty); }
set { SetValue(LogoPaddingProperty, value); }
}
public static readonly DependencyProperty LogoPaddingProperty =
DependencyProperty.Register("LogoPadding", typeof(Thickness), typeof(TabItemClose), new PropertyMetadata(new Thickness(0), OnPropertyChanged));
/// <summary>
/// 关闭item事件
/// </summary>
public event RoutedEventHandler CloseItem
{
add { AddHandler(CloseItemEvent, value); }
remove { RemoveHandler(CloseItemEvent, value); }
}
public static readonly RoutedEvent CloseItemEvent =
EventManager.RegisterRoutedEvent("CloseItem", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(TabItemClose));
/// <summary>
/// 关闭项的右键菜单
/// </summary>
public ContextMenu ItemContextMenu { get; set; }
Border ItemBorder;
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
ItemBorder = Template.FindName("_bordertop", this) as Border;
if (ItemContextMenu != null)
{
ItemBorder.ContextMenu = ItemContextMenu;
}
}
}
这里面我们添加了很多扩展功能，包括右键菜单，图标显示和控件圆角，以及各种背景色属性。
然后为TabItemClose设置样式
<Style TargetType="{x:Type local:TabItemClose}">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Foreground" Value="#666666"/>
<Setter Property="Margin" Value="0 0 0 0"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="CloseIcon" Value="/Images/close2.png"/>
<Setter Property="NormalBackground" Value="White"/>
<Setter Property="OverBackgound" Value="#33ca5100"/>
<Setter Property="SelectedBackgound" Value="#ca5100"/>
<Setter Property="NormalForeground" Value="#555558"/>
<Setter Property="OverForeground" Value="White"/>
<Setter Property="SelectedForeground" Value="White"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:TabItemClose}">
<Border x:Name="_bordertop" Width="{TemplateBinding Width}" MaxWidth="{TemplateBinding MaxWidth}" Height="{TemplateBinding Height}" CornerRadius="{TemplateBinding CornerRadius}" Background="{TemplateBinding NormalBackground}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" ToolTip="{TemplateBinding Header}" >
<DockPanel>
<Image x:Name="_logo" DockPanel.Dock="Left" Visibility="Visible" Margin="{TemplateBinding LogoPadding}" Source="{TemplateBinding LogoIcon}" VerticalAlignment="Center" HorizontalAlignment="Center" Stretch="Uniform" Width="{TemplateBinding LogoIconWidth}" Height="{TemplateBinding LogoIconHeigth}" />
<Grid Name="_grid" SnapsToDevicePixels="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition x:Name="_col_close" Width="20" />
</Grid.ColumnDefinitions>
<Border Grid.ColumnSpan="2" Background="White" Opacity="0"/>
<TextBlock x:Name="_txt" VerticalAlignment="Center" TextTrimming="CharacterEllipsis" Margin="3 0 3 0" Foreground="{TemplateBinding NormalForeground}" TextAlignment="Center" HorizontalAlignment="Center" Text="{TemplateBinding Header}" />
<Grid x:Name="_gridclose" Grid.Column="1" >
<Border x:Name="_borderbg" Background="Black" Opacity="0" />
<local:ButtonEx x:Name="PART_Close_TabItem" HorizontalAlignment="Center" VerticalAlignment="Center" Background="Transparent" Visibility="Visible" Icon="{TemplateBinding CloseIcon}" ButtonType="Icon" />
</Grid>
</Grid>
</DockPanel>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="LogoIcon" Value="{x:Null}">
<Setter TargetName="_logo" Property="Visibility" Value="Collapsed" />
</Trigger>
<Trigger Property="IsCanClose" Value="false">
<Setter TargetName="_gridclose" Property="Visibility" Value="Collapsed"/>
<Setter TargetName="_col_close" Property="Width" Value="0"/>
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter TargetName="_bordertop" Property="Background" Value="{Binding SelectedBackgound,RelativeSource={RelativeSource TemplatedParent}}" />
<Setter TargetName="_txt" Property="Foreground" Value="{Binding SelectedForeground,RelativeSource={RelativeSource TemplatedParent}}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="true"/>
<Condition Property="IsSelected" Value="false"/>
</MultiTrigger.Conditions>
<Setter TargetName="_txt" Property="Foreground" Value="{Binding OverForeground,RelativeSource={RelativeSource TemplatedParent}}"/>
<Setter TargetName="_bordertop" Property="Background" Value="{Binding OverBackgound,RelativeSource={RelativeSource TemplatedParent}}"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
这里面使用了一个close的图标
TabControl的图标可设置可不设置，看自己需要。
这里面还用到了前面讲的控件ButtonEx，定义方法我就不重复赘述了。大家可以通过这个链接跳转查看：http://www.cnblogs.com/xiaomingg/p/8699125.html。ButtonEx.cs里面还要添加几个方法用来支持关闭TabItem：
protected override void OnClick()
{
base.OnClick();
if (!string.IsNullOrEmpty(Name) && Name == "PART_Close_TabItem")
{
TabItemClose itemclose = FindVisualParent<TabItemClose>(this);
(itemclose.Parent as TabControl).Items.Remove(itemclose);
RoutedEventArgs args = new RoutedEventArgs(TabItemClose.CloseItemEvent, itemclose);
itemclose.RaiseEvent(args);
}
}
public static T FindVisualParent<T>(DependencyObject obj) where T : class
{
while (obj != null)
{
if (obj is T)
return obj as T;
obj = VisualTreeHelper.GetParent(obj);
}
return null;
}
引用示例：
<Grid Background="#858586">
<TabControl Foreground="Black" Width="300" Height="200" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">
<local:TabItemClose Cursor="Hand" Header="音乐电台" Height="20" Width="100">
<Grid Background="#aaffffff">
<TextBlock Text="音乐电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</local:TabItemClose>
<local:TabItemClose Cursor="Hand" Header="Mv电台" Height="20" Width="100">
<Grid Background="#aaffffff">
<TextBlock Text="Mv电台" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</local:TabItemClose>
</TabControl>
</Grid>
效果如下：
所有代码已经上传到github：https://github.com/cmfGit/WpfDemo.git
