PointerPressed not working in DataTemplate

Question

I have following xaml:

<ListBox PointerPressed="OnPressed"         
         ItemsSource="{Binding Items}">
            <ListBox.ItemTemplate>
                 <DataTemplate>
                        <Grid PointerPressed="OnPressed">
                            <TextBox Text="{Binding Value}"/>
                        </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
</ListBox>

And code behind:

public void OnPressed(object? sender, PointerPressedEventArgs? args)
{
     //some logic to handle PointerPressed event
}

PointerPressed on ListBox works, but PointerPressed on Grid (inside ListBox ItemTeplate) doesn't work, even when I remove PointerPressed from ListBox.

Do I miss something here?

Answer 1

UI elements only receive mouse input in areas where they have non-null drawing content.

Set Background="Transparent" (or any other Brush) on the Grid to make its whole are hit-test visible.

<ListBox.ItemTemplate>
    <DataTemplate>
        <Grid Background="Transparent" PointerPressed="OnPressed">
            <TextBox Text="{Binding Value}"/>
        </Grid>
    </DataTemplate>
</ListBox.ItemTemplate>