CODEWITHSUNDEEP
c#xamluwpfocus
James Esh
James Esh

Reputation: 2309

UWP alternative for WPF's IsKeyboardFocusWithin property

Is there a UWP alternative for WPF's IsKeyboardFocusWithin property? If not, how would you go about getting whether the focus is within itself.

I would prefer not manually walking down the Visual Tree checking each element if it is focused...

Upvotes: 4

Views: 238

Answers (1)

Rob Caplan - MSFT
Rob Caplan - MSFT

Reputation: 21919

FocusManager.GetFocusedElement will ID the focused element. You can then walk up the Visual Tree with VisualTreeHelper.GetParent to see if it's a child of the control you're interested in. Walking up will be much lighter weight than checking the entire tree child-node-by-node.

Something like:

    bool IsKeyboardFocusWithin(UIElement element)
    {
        UIElement focused = FocusManager.GetFocusedElement() as UIElement;

        while (focused != null)
        {
            if (focused == element)
            {
                return true;
            }
            focused = VisualTreeHelper.GetParent(focused) as UIElement;
        }
        return false;
    }

Upvotes: 3

Related Questions