Flyout problem with ActualWidth

[osnoser1]

What steps will reproduce this issue?

Window maximixe and open flyout

Expected outcome

Correct width

Environment

• MahApps.Metro v1.2.4, v1.3.0-ALPHA189
• Windows 7, 10
• Visual Studio 2015
• .NET Framework 4.5.1

Image

[punker76]

@osnoser1 I've updated the demo for this, cause we should use the FlyoutsControl for the binding. The ActualWidth of the Window gives us a wrong value if it's maximized, maybe another WPF bug...

<Controls:Flyout x:Name="settingsFlyout"
                 Controls:ControlsHelper.ContentCharacterCasing="Upper"
                 Width="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=Controls:FlyoutsControl}, Path=ActualWidth}"
                 Margin="200 0 0 0"
                 AreAnimationsEnabled="False"
                 Header="Settings"
                 Position="Right">
</Controls:Flyout>