Does PointerEntered work for WinUI?

Hong 1,206

I have tried all kinds of things to make PointerEntered work to no avail. Xaml:

    <Border
       BorderThickness="5"
       BorderBrush="Yellow"
       Width="300"
       Height="300"
       HorizontalAlignment="Center"
       VerticalAlignment="Center"
       Background="AliceBlue"
       PointerEntered="PointerEntered"
       PointerExited="PointerExited">
    </Border>

Code behind:

    private void PointerEntered(object sender, PointerRoutedEventArgs e)
    {
        tbInformation.Visibility = Microsoft.UI.Xaml.Visibility.Visible;
    }

    private void PointerExited(object sender, PointerRoutedEventArgs e)
    {
        tbInformation.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
    }

The events are not fired at all no matter how I move and where I put the mouse cursor. Could anyone shed some light on this?

Hong 1,206 Reputation points

2024-01-27T03:48:47.9833333+00:00

@gekka Thanks a lot. I have just realized that I am running the same problem as I did a little while ago - the packaged WinUI app with Windows Application Packaging Project behaves differently from the one without the packaging project. In other words, I have been having all kinds of problems with apps made with the second template. The first template works fine. I do not know why. I think I will just stay away from the second template for a while. Anyway, the events work with an app from the 1st template, but not with the 2nd template.
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2024-01-29T03:09:21.23+00:00

These events are also triggered in the packaged WinUI app with Windows Application Packaging Project for me. Make sure your Packaging Project is configured properly.
Hong 1,206 Reputation points

2024-01-30T04:26:09.59+00:00

Thank you, @Xiaopo Yang - MSFT I think the problem was caused by an invisible MediaPlayerElement.
Xiaopo Yang - MSFT 12,151 Reputation points Microsoft Vendor

2024-01-31T01:33:13.9233333+00:00

@Hong, can you mark answer for completion of the question?

Accepted answer

gekka 7,911 MVP

I tried with a simple window and the event did occur.

<Window
    x:Class="CSWinUI3.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:CSWinUI3"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

<Grid>
    <Border
       BorderThickness="5"
       BorderBrush="Yellow"
       Width="300"
       Height="300"
       HorizontalAlignment="Center"
       VerticalAlignment="Center"
       Background="AliceBlue"
       PointerEntered="PointerEntered"
       PointerExited="PointerExited">
        </Border>
    </Grid>
</Window>

However, if IsHitVisible is false on the ancestor element, the event may not fire.

<Grid IsHitTestVisible="False">
    <Border

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Does PointerEntered work for WinUI?

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