CODEWITHSUNDEEP
silverlightsilverlight-4.0focus
Ponraja
Ponraja

Reputation: 570

IsKeyboardFocusWithin in silverlight

How to get the keyboard focus is anywhere within the element or its visual tree child elements in Silverlght?

Upvotes: 1

Views: 197

Answers (1)

AnthonyWJones
AnthonyWJones

Reputation: 189505

There are two possible solutions depending on your scenario (we usually prefer more detail in a question).

First you can use the FocusManager.GetFocusedElement() static method to get the element that currently has the focus. You could then use the VisualTreeHelper to determine if the element is with the your element. I would normally use an extension class to make using VisualTreeHelper easier. Mine is found here. With that class present. Then:-

public static bool IsFocusIn(DependencyObject element)
{
      DependendyObject focusedElement = FocusManager.GetFocusedElement() as DependencyObject;
      if (focusedElement != null)
      {
           return focusedElement.Ancestors().Any(e => e == element);
      }
      return false;
}

The second approach is to add event handlers to the GotFocus and LostFocus events of your element. You can then track whenever the focus enters or leaves any control within your element.

Upvotes: 3

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