无法使滚动查看器水平滚动

Question

我有一个 ScrollViewer，其中包含一个 StackedPanel，其中的矩形水平布局。我希望能够水平滚动，但这对我来说并没有发生。这是我的 XAML：

<common:LayoutAwarePage
    x:Name="pageRoot"
    x:Class="BlastSwing.GroupedItemsPage"
    DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
    IsTabStop="false"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:BlastSwing"
    xmlns:data="using:BlastSwing.Data"
    xmlns:common="using:BlastSwing.Common"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.Resources>

        <!--
            Collection of grouped items displayed by this page, bound to a subset
            of the complete item list because items in groups cannot be virtualized
        -->
        <CollectionViewSource
            x:Name="groupedItemsViewSource"
            Source="{Binding Groups}"
            IsSourceGrouped="true"
            ItemsPath="TopItems"
            d:Source="{Binding AllGroups, Source={d:DesignInstance Type=data:SampleDataSource, IsDesignTimeCreatable=True}}"/>
    </Page.Resources>

    <!--
        This grid acts as a root panel for the page that defines two rows:
        * Row 0 contains the back button and page title
        * Row 1 contains the rest of the page layout
    -->
    <Grid Style="{StaticResource LayoutRootStyle}">
        <Grid.RowDefinitions>
            <RowDefinition Height="140"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!-- Back button and page title -->
        <TextBlock x:Name="pageTitle" Text="Blast Swing" Style="{StaticResource PageHeaderTextStyle}" Margin="40,0,-10,53"/>

        <ScrollViewer HorizontalAlignment="Left" Height="628" Grid.Row="1" VerticalAlignment="Top" Width="1366" RenderTransformOrigin="0.476999998092651,0.998000025749207" VerticalScrollMode="Disabled" Margin="-22,0,0,0" HorizontalScrollMode="Auto">
            <StackPanel Height="568" Width="1313" RenderTransformOrigin="-0.0179999992251396,0.512000024318695" Orientation="Horizontal">
                <Rectangle Fill="#FF974B55" Height="568" Stroke="Black" VerticalAlignment="Top" Width="371"/>
                <Rectangle Fill="#FF17179C" Height="568" Stroke="Black" VerticalAlignment="Top" Width="371"/>
                <Rectangle Fill="#FF8D2B80" Height="568" Stroke="Black" VerticalAlignment="Top" Width="371"/>
                <Rectangle Fill="#FF301D2F" Height="568" Stroke="Black" VerticalAlignment="Top" Width="371"/>
                <Rectangle Fill="#FFF4F4F5" Height="568" Stroke="Black" VerticalAlignment="Top" Width="371"/>
            </StackPanel>
        </ScrollViewer>

        <!-- Back button and page title -->

        <!-- Horizontal scrolling grid used in most view states -->

        <!-- Vertical scrolling list only used when snapped -->

        <VisualStateManager.VisualStateGroups>

            <!-- Visual states reflect the application's view state -->
            <VisualStateGroup x:Name="ApplicationViewStates">
                <VisualState x:Name="FullScreenLandscape"/>
                <VisualState x:Name="Filled"/>

                <!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
                <VisualState x:Name="FullScreenPortrait"/>

                <!--
                    The back button and title have different styles when snapped, and the list representation is substituted
                    for the grid displayed in all other view states
                -->
                <VisualState x:Name="Snapped">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</common:LayoutAwarePage>

Answer 1

您设置的 Scrollviewer 的 Width="1366" 比您的子堆栈面板 Width="1313" 多。

如果您想看到水平滚动条，那么您可能需要将 ScrollViewer 的大小设置为小于 1313 并且它应该能够显示水平滚动条，因为它无法完全显示内容。

Answer 2

将 ScrollViewer 上的 HorizontalScrollBarVisibility 属性设置为 Visible 或 Auto。

Answer 3

您正在手动设置 StackPanel 的宽度，它小于其子项的总数。