c# - 在 WPF 中。如何像iPhone一样通过鼠标拖动滚动ScrollViewer中的对象？

Question

通过鼠标滚轮或滚动条种子拖动滚动效果很好。但是在 ScrollView 上通过鼠标拖动内容进行滚动还没有完成。我该如何实现此操作？

        <ScrollViewer x:Name="scrollViewer" Grid.Row="1" HorizontalScrollBarVisibility="Auto" CanContentScroll="True">
            <Grid x:Name="galleryGrid" ShowGridLines="True">
                <Grid.RowDefinitions>
                    <RowDefinition Height="*"></RowDefinition>
                    <RowDefinition Height="*"></RowDefinition>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="500"></ColumnDefinition>
                    <ColumnDefinition Width="500"></ColumnDefinition>
                    <ColumnDefinition Width="500"></ColumnDefinition>
                    <ColumnDefinition Width="500"></ColumnDefinition>
                    <ColumnDefinition Width="500"></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Button Grid.Column="0" Magin="10,10,10,10">Test</Button>
                <Button Grid.Column="1" Magin="10,10,10,10">Test</Button>
                <Button Grid.Column="2" Magin="10,10,10,10">Test</Button>
                <Button Grid.Column="3" Magin="10,10,10,10">Test</Button>
                <Button Grid.Column="4" Magin="10,10,10,10">Test</Button>
            </Grid>
        </ScrollViewer>

Answer 1

我找到了解决这个问题的方法。它在...

    Point scrollMousePoint = new Point();
    double hOff = 1;
    private void scrollViewer_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        scrollMousePoint = e.GetPosition(scrollViewer);
        hOff = scrollViewer.HorizontalOffset;
        scrollViewer.CaptureMouse();
    }

    private void scrollViewer_PreviewMouseMove(object sender, MouseEventArgs e)
    {
        if(scrollViewer.IsMouseCaptured)
        {
            scrollViewer.ScrollToHorizontalOffset(hOff + (scrollMousePoint.X - e.GetPosition(scrollViewer).X));
        }
    }

    private void scrollViewer_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        scrollViewer.ReleaseMouseCapture();
    }

    private void scrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
    {
        scrollViewer.ScrollToHorizontalOffset(scrollViewer.HorizontalOffset + e.Delta);
    }

谢谢!