WPF and C# ComboBox Next Focus

Question

Im using WPF and C#. I have an application with an OnScreenKeyboard made with buttons. When I press the tab button in the OnScreenKeyboard it does this:

if (IsEnterEnabled){
  CurrentTextBox.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
}

CurrentTextBox is a Control.

When a textbox is focused it works fine and move to the next focus, even if the next focus is a comboBox, but if the current focus is in an editable combo box it doesnt move to next focus element.

If the combo box is not editable, it works.

Answer 1

Since the ComboBox has a TextBox inside it which currently has focus, telling ComboBox to move next will only move to the TextBox. Instead, get the inner TextBox and move next on that:

        var s1 = FocusManager.GetFocusedElement(this);
        if (s1 is FrameworkElement)
        {
            ((FrameworkElement)s1).MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
        }