winui3 自定义标题栏

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winui3 自定义标题栏

MainWindow.xaml 添加

xml
          
<Grid  Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid.RowDefinitions>
        <RowDefinition MinHeight="48"/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <!-- 标题栏 -->
    <Border x:Name="AppTitleBar" VerticalAlignment="Top">
        <TextBlock x:Name="AppTitle" Text="{StaticResource AppTitleName}" VerticalAlignment="Top" Margin="0,8,0,0" />
    </Border>
</Grid>
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MainWindow.xaml.cs 中添加

c#
        
public MainWindow()
{
    this.InitializeComponent();

    // 自定义标题栏
    ExtendsContentIntoTitleBar = true;
    SetTitleBar(AppTitleBar);
}
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左侧添加按钮

如果只是在左侧添加按钮,可以直接使用 xaml 定义

MainWindow.xaml 添加

xml
                 
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition MinHeight="48"/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition MinHeight="auto"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Button Content="返回" Click="BackBtn_Click"/>
        <!-- 标题栏 -->
        <Border x:Name="AppTitleBar" Grid.Column="1" VerticalAlignment="Top">
            <TextBlock x:Name="AppTitle" Text="{StaticResource AppTitleName}" VerticalAlignment="Top" Margin="0,8,0,0" />
        </Border>
    </Grid>
</Grid>
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添加自定义可点击内容

如果需要在中间添加可点击可输入内容,那么就需要这样做

MainWindow.xaml 添加

xml
                 
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition MinHeight="48"/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <Border x:Name="AppTitleBar" VerticalAlignment="Top">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition/>
                <ColumnDefinition/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>
            <TextBlock x:Name="AppTitle" Text="{StaticResource AppTitleName}" VerticalAlignment="Top" Margin="0,8,0,0" />
            <TextBox x:Name="SearchTb" Grid.Column="1" />
        </Grid>
    </Border>
</Grid>
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MainWindow.xaml.cs 中添加

c#
                         
public MainWindow()
{
    this.InitializeComponent();

    // 自定义标题栏
    ExtendsContentIntoTitleBar = true;
    SetTitleBar(AppTitleBar);

    var _baseWindowHandle = WindowNative.GetWindowHandle(this);
    var windowId = Win32Interop.GetWindowIdFromWindow(_baseWindowHandle);
    var _appWindow = AppWindow.GetFromWindowId(windowId);
    var dpiScale = Content.XamlRoot.RasterizationScale;
    var nonClientSource = InputNonClientPointerSource.GetForWindowId(_appWindow.Id);

    var inputPoint = SearchTb.TransformToVisual(Content).TransformPoint(new Point(0, 0));
    nonClientSource.ClearRegionRects(NonClientRegionKind.Passthrough);
    nonClientSource.SetRegionRects(NonClientRegionKind.Passthrough, 
    // 可以添加多个区域
        [new(
            (int)Math.Round(inputPoint.X * dpiScale),
            (int)Math.Round(inputPoint.Y * dpiScale),
            (int)Math.Round(SearchTb.ActualWidth * dpiScale), // 请注意,要获取到可点击元素的显示尺寸才行
            (int)Math.Round(SearchTb.ActualHeight * dpiScale)
    )]);
}
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Command 绑定

使用 Command={TemplateBinding BackCommand} 可能无效

可以使用 Command="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=BackCommand}"

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