.net 如何在WPF XAML中的TabItem中添加iPressed状态

我正在WPF窗口中使用TabItem，当用户按下它时，我想将其更改为TabItem的背景

如何在XAML中实现这一点？

您也可以试试这个
 You can also try this

<Grid>
    <TabControl Margin="10" BorderThickness="0" Background="LightGray">
        <TabControl.Resources>
            <Style TargetType="TabItem">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="TabItem">
                            <Grid Name="Panel">
                                <ContentPresenter x:Name="ContentSite"
                                    VerticalAlignment="Center"
                                    HorizontalAlignment="Center"
                                    ContentSource="Header"
                                    Margin="10,2"/>
                            </Grid>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsSelected" Value="True">
                                    <Setter TargetName="Panel" Property="Background" Value="LightSkyBlue" />
                                </Trigger>
                                <Trigger Property="IsSelected" Value="False">
                                    <Setter TargetName="Panel" Property="Background" Value="White" />
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </TabControl.Resources>
        <TabItem Header="General">
            <Label Content="Content goes here..." />
        </TabItem>
        <TabItem Header="Security" />
        <TabItem Header="Details" />
    </TabControl>
</Grid>

首先，您需要创建自己的选项卡项

public class MyTabItem : TabItem
{
    public bool IsPressed
    {
        get { return (bool)GetValue(IsPressedProperty); }
        set
        {
            SetValue(IsPressedProperty, value);
        }
    }

    public static readonly DependencyProperty IsPressedProperty =
       DependencyProperty.Register("IsPressed", typeof(bool), typeof(MyTabItem), new PropertyMetadata(false));

    protected override void OnMouseDown(MouseButtonEventArgs e)
    {
        base.OnMouseDown(e);
        IsPressed = true;
    }

    protected override void OnMouseLeave(MouseEventArgs e)
    {
        base.OnMouseLeave(e);
        IsPressed = false;
    }

    protected override void OnMouseUp(MouseButtonEventArgs e)
    {
        base.OnMouseUp(e);
        IsPressed = false;
    }
} 

然后使用自定义ControlTemplate和iPressed属性的触发器为新控件在XAML中创建样式

<Style TargetType="{x:Type local:MyTabItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:MyTabItem}">
                <Grid SnapsToDevicePixels="True">
                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1,1,1,0" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}">
                        <ContentPresenter x:Name="Content" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" ContentStringFormat="{TemplateBinding HeaderStringFormat}" ContentSource="Header" HorizontalAlignment="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{Binding VerticalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}"/>
                    </Border>
                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Background" TargetName="Bd">
                            <Setter.Value>
                                <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                                    <GradientStop Color="#FFEAF6FD" Offset="0.15"/>
                                    <GradientStop Color="#FFD9F0FC" Offset="0.5"/>
                                    <GradientStop Color="#FFBEE6FD" Offset="0.5"/>
                                    <GradientStop Color="#FFA7D9F5" Offset="1"/>
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                    <Trigger Property="IsSelected" Value="True">
                        <Setter Property="Panel.ZIndex" Value="1"/>
                        <Setter Property="Background" TargetName="Bd" Value="#FFF9F9F9"/>
                    </Trigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelected" Value="False"/>
                            <Condition Property="IsMouseOver" Value="True"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="BorderBrush" TargetName="Bd" Value="#FF3C7FB1"/>
                    </MultiTrigger>
                    <Trigger Property="TabStripPlacement" Value="Bottom">
                        <Setter Property="BorderThickness" TargetName="Bd" Value="1,0,1,1"/>
                    </Trigger>
                    <Trigger Property="TabStripPlacement" Value="Left">
                        <Setter Property="BorderThickness" TargetName="Bd" Value="1,1,0,1"/>
                    </Trigger>
                    <Trigger Property="TabStripPlacement" Value="Right">
                        <Setter Property="BorderThickness" TargetName="Bd" Value="0,1,1,1"/>
                    </Trigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelected" Value="True"/>
                            <Condition Property="TabStripPlacement" Value="Top"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="Margin" Value="-2,-2,-2,-1"/>
                        <Setter Property="Margin" TargetName="Content" Value="0,0,0,1"/>
                    </MultiTrigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelected" Value="True"/>
                            <Condition Property="TabStripPlacement" Value="Bottom"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="Margin" Value="-2,-1,-2,-2"/>
                        <Setter Property="Margin" TargetName="Content" Value="0,1,0,0"/>
                    </MultiTrigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelected" Value="True"/>
                            <Condition Property="TabStripPlacement" Value="Left"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="Margin" Value="-2,-2,-1,-2"/>
                        <Setter Property="Margin" TargetName="Content" Value="0,0,1,0"/>
                    </MultiTrigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelected" Value="True"/>
                            <Condition Property="TabStripPlacement" Value="Right"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="Margin" Value="-1,-2,-2,-2"/>
                        <Setter Property="Margin" TargetName="Content" Value="1,0,0,0"/>
                    </MultiTrigger>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter Property="Background" TargetName="Bd" Value="#FFF4F4F4"/>
                        <Setter Property="BorderBrush" TargetName="Bd" Value="#FFC9C7BA"/>
                        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                    </Trigger>

                    <!--You need this trigger to handle IsPressed changes-->
                    <Trigger Property="IsPressed" Value="True">
                        <Setter Property="Background" TargetName="Bd" Value="Red"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

请参考此链接，上面的链接是针对选定选项卡的，而不是针对代码段的按下选项卡的。这是针对选定选项卡，而不是针对按下的选项卡。我只想更改背景，直到用户按下鼠标左键为止。一旦鼠标被释放，它就会恢复正常。注意：这不会模仿当鼠标离开并在按下鼠标按钮时再次进入按下状态的按钮行为。因此，选项卡项的行为不会像按钮。