Prevent hyperlink Click event from bubbling up

Question

I'm designing a windows Phone app. I have a Hyperlink object in a RichTextBox, in a Grid. The Grid had a Tap event, and the Hyperlink has a Click event.

Clicking the Hyperlink also raises the parent Grid's Tap event. How can I prevent this?

I would use e.Handled in the Click handler, but RoutedEventArgs do not have a Handled property in Silverlight for Windows Phone... I also tried walking the logical tree to look for the original source, but the click appears to originate from a MS.Internal.RichTextBoxView control (e.OriginalSource)...

Answer 1

I don't think there is any good way from within the Click handler itself. The following state management can work though:

XAML:

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0" Tap="ContentPanel_Tap_1">
    <RichTextBox Tap="RichTextBox_Tap_1">
       <Paragraph>
           fdsfdfdf
           <Hyperlink Click="Hyperlink_Click_1">fdsfdsfsaf</Hyperlink>
           fsdfsdfa
       </Paragraph>
   </RichTextBox>
</Grid>

and the code:

bool RtbTapHandled = false;

private void Hyperlink_Click_1(object sender, RoutedEventArgs e)
{
    System.Diagnostics.Debug.WriteLine("Hyperlink");
    RtbTapHandled = true;
}

private void RichTextBox_Tap_1(object sender, System.Windows.Input.GestureEventArgs e)
{
    if (RtbTapHandled)
    {
        e.Handled = true;
    }

    RtbTapHandled = false;
    System.Diagnostics.Debug.WriteLine("RTB_Tap");
}

private void ContentPanel_Tap_1(object sender, System.Windows.Input.GestureEventArgs e)
{
    System.Diagnostics.Debug.WriteLine("Content_Tap");
}

In this case if you click on the RichTextBox you'll get callbacks from both RichTextBox_Tap_1 and ContentPanel_Tap_1, but if you click on the Hyperlink you'll get Hyperlink_Click_1 and RichTextBox_Tap_1 though it'll be handled at that level and stopped.