Question

我在Telerik WPF RadCarousel的键盘导航上有点吃力。如果我在项目外部但在旋转木马控件内单击，键盘导航会按预期工作（我可以使用左右键盘箭头在项目之间切换），但如果我在RadCarousel内单击项目，键盘导航将消失。当转盘中的项目有焦点时，我如何让RadCarousel处理键盘导航？

我想完成的其他事情：

Automatically show the SelectedItem as the "front-item" in the carousel.
Automatically select the "front-item" when navigating through the carousel.

我的RadCarousel绑定设置如下：

    <ScrollViewer CanContentScroll="true">
        <telerik:RadCarousel Name="carousel" HorizontalScrollBarVisibility="Hidden" 
                             ItemsSource="{Binding Path=Templates}"
                             ItemTemplate="{StaticResource template}"
                             SelectedItem="{Binding Path=SelectedTemplateAndFolder}" />
    </ScrollViewer>

编辑：

通过使用Snoop，我可以看到当滚动工作时，“CarouselScrollViewer”有焦点。选择一个项目会使RadCarousel获得焦点（并使导航停止工作）。

Answer 1

我得到了最重要的工作，那就是键盘导航和将所选项目移动到旋转木马的前面。

键盘导航：

private void Carousel_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
    CarouselScrollViewer scrollViewer = FindChild<CarouselScrollViewer>(this.carousel, null);


scrollViewer.Focus();


}


public static T FindChild<T>(DependencyObject parent, string childName)
   where T : DependencyObject
{
    // Confirm parent and childName are valid. 
    if (parent == null) return null;


T foundChild = null;


int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i &lt; childrenCount; i++)
{
    var child = VisualTreeHelper.GetChild(parent, i);
    // If the child is not of the request child type child
    T childType = child as T;
    if (childType == null)
    {
        // recursively drill down the tree
        foundChild = FindChild&lt;T&gt;(child, childName);


        // If the child is found, break so we do not overwrite the found child. 
        if (foundChild != null) break;
    }
    else if (!string.IsNullOrEmpty(childName))
    {
        var frameworkElement = child as FrameworkElement;
        // If the child s name is set for search
        if (frameworkElement != null &amp;&amp; frameworkElement.Name == childName)
        {
            // if the child s name is of the request name
            foundChild = (T)child;
            break;
        }
    }
    else
    {
        // child element found.
        foundChild = (T)child;
        break;
    }
}


return foundChild;


}

将所选项目移动到转盘中心：

private void Carousel_SelectionChanged(object sender, SelectionChangeEventArgs e)
{
    this.carousel.BringDataItemIntoView(this.carousel.CurrentItem);
}

友情链接