When I use a CheckBox with Element binding, then open/close works, but it doesn't in my scenario.

Some differences are:

• I am using a Canvas for the Layout
• The InfoBox has the binding statement to a bool on the ViewModel
• I am using Caliburn.Micro
• A button click toggles the bool

 <Canvas x:Name="LayoutRoot">

 ...<ig:XamInfoBox x:Name="infoBox" IsClosedOnOutsideTap="False" IsClosedOnBackButton="False" RelativeToElementPlacement="Top" PointerShape="CurlyPointer" DisconnectedPointerOffset="0" RelativeToElement="{Binding ElementName=dial}" PointerLength="40" PointerOffset="1" Background="#FF9D2F14" PointerBackground="#FF9D2F14" IsOpen="{Binding IsShowBubble, Mode=TwoWay}">

<TextBlock Foreground="White" TextWrapping="Wrap" Text="{Binding MyValue}" Width="80" HorizontalAlignment="Center" FontSize="32" TextAlignment="Center" FontWeight="Bold"/>

</StackPanel>

</ig:XamInfoBox>

<Button Canvas.Left="31" Canvas.Top="62" Content="Button" Height="76" Name="ShowBubble" Width="102" />

bool isShowBubble;

bool IsShowBubble{

get { return isShowBubble; }

set {

value;

NotifyOfPropertyChange(() => IsShowBubble);

}

}

}

void ShowBubble() { IsShowBubble = !IsShowBubble; }

Hi,

We were able to reproduce the issue. It's a bug, as the IsOpen property is losing the binding. We are opening a support case and log a bug for this.

As a workaround, in order to not to set the property in the code-behind and break your MVVM, you can use the following class that defines an attached property that you can bind:

 public class InfoBoxIsOpenWrapper : FrameworkElement

    {

        public static bool GetIsOpen(DependencyObject obj)

        {

            return (bool)obj.GetValue(IsOpenProperty);

        }

        public static void SetIsOpen(DependencyObject obj, bool value)

        {

            obj.SetValue(IsOpenProperty, value);

        }

        // Using a DependencyProperty as the backing store for IsOpen.  This enables animation, styling, binding, etc...

        public static readonly DependencyProperty IsOpenProperty =

            DependencyProperty.RegisterAttached("IsOpen", typeof(bool), typeof(InfoBoxIsOpenWrapper), new PropertyMetadata(IsOpenPropertyChanged));

        private static void IsOpenPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            var infoBox = (XamInfoBox) d;

            infoBox.IsOpen = (bool) e.NewValue;

        }

    }

<ig:XamInfoBox x:Name="infobox" 
               IsClosedOnOutsideTap="False"
               RelativeToElement="{Binding ElementName=relative}"

               InfoBoxClose:InfoBoxIsOpenWrapper.IsOpen="{Binding IsShowBubble}">

                <TextBlock Text="InfoBox!" Padding="20"/>

</ig:XamInfoBox>

 Let me know if it works for you.

 I apologize for the inconveniences.

Andres

Hello rmtuckerphx,

Regarding Andres comments below, I have created a support case CAS-70733-T97JGN.  I have also logged this as a development issue in our system with the issue ID 84837.  I will send you more details regarding this development issue through the support case. 

aaguiar said:

Hi,

We were able to reproduce the issue. It's a bug, as the IsOpen property is losing the binding. We are opening a support case and log a bug for this

.Andres

Please let me know if you have any questions on this matter.