ListBox is selecting more than one item when it is being dragged

Question

I have a ListBox with RadioButton inside it of the same GroupName.

Like so:

<ListBox x:Name="AnswerListBox" DataContext="{Binding .}" ItemsSource="{Binding Answers}" Width="auto" HorizontalAlignment="Center" >
    <ListBox.ItemTemplate>
        <DataTemplate>
            <local:spriteToggleButton DataContext="{Binding .}" HorizontalAlignment="Center" Text="{Binding text}" Selected="{Binding selected}" Sprites="{Binding Path=DataContext.UISprites, ElementName=questionField}" IsChecked="{Binding selected, Mode=TwoWay}" GroupName="{Binding Path=DataContext.QuestionTitle, ElementName=questionField}" />
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

When I click on a RadioButton it will unselect another in that group, this is fine.

But when I do a swipe down on the ListBox it will select more than one RadioButton which is an unwanted behavior.

There might be more than one way of changing that behavior.

I don't need it to scroll up and down the list as I will only show as many items as will fit on screen. so maybe that behavior can be disabled.
Maybe a callback could incur when the ListBox is scrolled and something could disable selection when dragging in being done.
the DataContext to the listbox is of List<> so is there a way to change the setter of my Selected variable in my List<> so that it unsets the other values in that list.

The DataContext="{Binding .}" is completely unnecessary. The DataContext defaults to inheriting it from the parent element, or template. — Claus Jørgensen, Aug 04 '11 at 16:11
Ok thanks, removing will make my code cleaner. but i still have that issue i've mentioned. Thanks for the tip though. It's left over code from when nothing worked with some of my DependencyProperties. — Joseph Le Brech, Aug 04 '11 at 16:15

score 1 · Accepted Answer · answered Aug 04 '11 at 16:42

1

Set ScrollViewer.VerticalScrollBarVisibility to "Disabled" on the ListBox element.
In the SelectionChanged event, set the SelectedIndex to -1
You could clear all the other values in the ItemsSource in the SelectionChanged event.

answered Aug 04 '11 at 16:42

Claus Jørgensen

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i'll try #1, #2 not sure, wouldn't that disable valid clicks not just drag-clicks. #3 do you mean sender.ItemsSource? – Joseph Le Brech Aug 04 '11 at 17:07
Depends how you set your stuff up, but most likely, yes. – Claus Jørgensen Aug 04 '11 at 18:09
actually the solution was to change the ClickMode to "press", it makes sense now because by dragging and letting go i'm releasing on more that one item. – Joseph Le Brech Aug 05 '11 at 09:08

ListBox is selecting more than one item when it is being dragged

1 Answers1