Windows旁白器是否正在读取自定义工具提示内容？

Question

我有一个要求阅读内容的复杂工具提示内容的WPF或UWP应用程序的叙述。我正面临着阅读工具提示可见内容的挑战。试图重写AutomationPeer类和the方法。但没有运气：

我的XAML UI如下：

 <Button Content="Submit" Grid.Row="2" Height="100" Width="200"  >
        <Button.ToolTip  x:Uid="Addition_Details" > 
            <local:MyStackPanel Orientation="Vertical"  Focusable="True" KeyboardNavigation.TabIndex="0" ForceCursor="True">
                <TextBlock Text="Additional Details" KeyboardNavigation.TabIndex="1"/>
                <TextBlock Text="Driver" KeyboardNavigation.TabIndex="2"/>
                <TextBlock Text="A0221" KeyboardNavigation.TabIndex="3"/>
            </local:MyStackPanel>
        </Button.ToolTip>
    </Button>

CustomGrid类类似于：

 public class MyStackPanel:StackPanel
{
    protected override AutomationPeer OnCreateAutomationPeer()
    {
        return new UIAutomationChildPeer(this);
    }

  
}
public class UIAutomationChildPeer : FrameworkElementAutomationPeer
{
    public UIAutomationChildPeer(FrameworkElement element):base(element)
    {

    }

    protected override string GetClassNameCore()
    {
        return "Additional Details";
    }
    protected override List<AutomationPeer> GetChildrenCore()
    {
        var childrenAutomationPeer = new List<AutomationPeer>();

        var owner = Owner as StackPanel;

        if (owner != null)
        {
            //owner.GotFocus += Owner_GotFocus;
            var childElements = owner.Children;// indName("myGrid", owner) as Grid;
            if (childElements != null && childElements.Count > 0)
            {
                foreach (TextBlock item in childElements)
                {
                        var headerTextBlockAutomationPeer = new TextAutomationPeer(item);
                    childrenAutomationPeer.Add(headerTextBlockAutomationPeer);

                }
            }

        }

        return childrenAutomationPeer;
        
    }
}

public class TextAutomationPeer : TextBlockAutomationPeer
{
    private StringBuilder detail = new StringBuilder();
    public UIElement Element { get { return Owner; } }

    public TextAutomationPeer(TextBlock owner) : base(owner)
    {
        if (!string.IsNullOrWhiteSpace(owner.Text.ToString()))
        {
            detail.Append(owner.Text.ToString());
        }
    }

    public override string ToString()
    {
        return detail.ToString();
    }

}

尝试手动触发焦点事件或设置Tab索引。没有什么能带来结果。任何解决这个问题的线索。

#UWP #WPF #Windows10 10

Answer 1

你放在工具提示中的控件不会集中注意力，所以叙述者不会响应它们。这对于TextBlock也是一样的。

通常，我们将使用AutomationProperties.HelpText附着特性向控件添加简单文本。叙述者将对AutomationProperties.HelpText作出回应。