WPF滚动查看器鼠标滚轮不能与stackpanel一起工作

本文关键字：不能 stackpanel 一起 工作 滚动 鼠标 WPF | 更新日期: 2023-09-27 18:18:35

我有一个stackpanel包装与滚动查看器。在stackpanel里面，我有一些网格，网格里面有stackpanel和一些瓷砖控制MahApps Metro。

如果我拖动滚动条，则scrollviewer工作正常。但是鼠标转轮不工作。可能是一些控制偷走了鼠标滚轮的动作，但我不知道是哪一个。我试着滚动鼠标滚轮，同时专注于滚动条。但它仍然不能工作。

<ScrollViewer x:Name="TS" Grid.Row="1" HorizontalAlignment="Stretch" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled" CanContentScroll="True" PanningMode="HorizontalOnly" SnapsToDevicePixels="True" Background="Transparent">
    <StackPanel x:Name="TilesPanel" VerticalAlignment="Top" HorizontalAlignment="Stretch" Orientation="Horizontal">
        <StackPanel.Resources>
            <Style TargetType="{x:Type Grid}">
                <Setter Property="Margin" Value="0,50,0,0"/>
            </Style>
        </StackPanel.Resources>
        <Separator Background="{x:Null}" Width="110"></Separator>
        <Grid>
            <StackPanel>
                <StackPanel Orientation="Horizontal">
                    <StackPanel.Resources>
                        <Style TargetType="{x:Type Grid}">
                            <Setter Property="Margin" Value="10,0,0,0"/>
                        </Style>
                    </StackPanel.Resources>
                    <Grid Height="260">
                        <StackPanel>
                            <StackPanel.Resources>
                                <Style TargetType="{x:Type StackPanel}">
                                    <Setter Property="Margin" Value="0,0,0,10"/>
                                </Style>
                            </StackPanel.Resources>
                        <StackPanel Width="247" Height="119">
                            <Custom:Tile x:Name="Mail" Margin="0" Width="auto" d:LayoutOverrides="Height">
                                <Image Stretch="Fill" Source="Res/AppTiles/Mail.png"/>
                            </Custom:Tile>
                        </StackPanel>
                        //and it goes on like this//
                        </grid>
                      </stackpanel>
                <Separator Background="{x:Null}" Width="50"/>
            </Grid>
    </StackPanel>
    </ScrollViewer>

是栅格在挡道吗?或者有其他的方法来使用鼠标滚轮在水平滚动查看器?我就是想不明白。请帮助。

WPF滚动查看器鼠标滚轮不能与stackpanel一起工作

我明白了。然后用最小的方法解出来

<ScrollViewer x:Name="TS" Grid.Row="1" HorizontalAlignment="Stretch" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled" CanContentScroll="True" PanningMode="HorizontalOnly" SnapsToDevicePixels="True" Background="Transparent" PreviewMouseWheel="TS_PreviewMouseWheel">

添加PreviewMouseWheel = " TS_PreviewMouseWheel "

和后面的代码

private void TS_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
    {
        TS.HorizontalScrollBarVisibility = ScrollBarVisibility.Visible;
        ScrollViewer scrollviewer = sender as ScrollViewer;
        if (e.Delta > 0)
        {
            scrollviewer.LineLeft();
        }
        else
        {
            scrollviewer.LineRight();
        }
        e.Handled = true;
 }

谢谢。

通常一个鼠标只有一个滚轮，用于垂直滚动。我想你的情况也一样。

根据您的代码，您似乎想要通过鼠标滚轮执行水平滚动。

我提出了一个使用Attached properties

的解决方案样本xaml 

<ScrollViewer x:Name="TS"
              Grid.Row="1"
              HorizontalAlignment="Stretch"
              HorizontalScrollBarVisibility="Auto"
              VerticalScrollBarVisibility="Disabled"
              CanContentScroll="False"
              PanningMode="HorizontalOnly"
              SnapsToDevicePixels="True"
              Background="Transparent"
              l:ScrollViewerExtensions.IsHorizontalScrollOnWheelEnabled="true">

我已经将ScrollViewerExtensions.IsHorizontalScrollOnWheelEnabled附加到滚动查看器，这将通过鼠标滚轮实现水平滚动。还记得设置CanContentScroll="False"，这在你的情况下是需要的。

ScrollViewerExtensions类

namespace CSharpWPF
{
    class ScrollViewerExtensions : DependencyObject
    {
        public static bool GetIsHorizontalScrollOnWheelEnabled(DependencyObject obj)
        {
            return (bool)obj.GetValue(IsHorizontalScrollOnWheelEnabledProperty);
        }
        public static void SetIsHorizontalScrollOnWheelEnabled(DependencyObject obj, bool value)
        {
            obj.SetValue(IsHorizontalScrollOnWheelEnabledProperty, value);
        }
        // Using a DependencyProperty as the backing store for IsHorizontalScrollOnWheelEnabled.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty IsHorizontalScrollOnWheelEnabledProperty =
            DependencyProperty.RegisterAttached("IsHorizontalScrollOnWheelEnabled", typeof(bool), typeof(ScrollViewerExtensions), new PropertyMetadata(false, OnIsHorizontalScrollOnWheelEnabledChanged));
        private static void OnIsHorizontalScrollOnWheelEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ScrollViewer sv = d as ScrollViewer;
            if ((bool)e.NewValue)
                sv.PreviewMouseWheel += sv_PreviewMouseWheel;
            else
                sv.PreviewMouseWheel -= sv_PreviewMouseWheel;
        }
        static void sv_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
            ScrollViewer scrollviewer = sender as ScrollViewer;
            if (e.Delta > 0)
                scrollviewer.LineLeft();
            else
                scrollviewer.LineRight();
            e.Handled = true;
        }
    }
}

整个想法是听取鼠标滚轮并根据滚轮增量(旋转)向左或向右滚动

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