/// <summary>
/// Gets a boolean indicating whether or not the specified <see cref="IUIElement"/> is a focus scope element
/// </summary>
/// <param name="element">The <see cref="IUIElement"/> to check</param>
/// <returns>A boolean indicating whether or not the specified <see cref="IUIElement"/> is a focus scope element</returns>
public static bool GetIsFocusScope(IUIElement element)
{
if (!element.DependencyProperties.ContainsKey(FocusManager.IsFocusScopeProperty))
{
return false;
}
return element.GetValue<bool>(FocusManager.IsFocusScopeProperty);
}
/// <summary>
/// Gets the focused <see cref="UIElement"/>, if any, within the specified focus scope
/// </summary>
/// <param name="focusScope">The <see cref="IUIElement"/> that represents the scope within which to find the focused element</param>
/// <returns>A <see cref="UIElement"/> representing the focused element of the specified focus scope</returns>
public static UIElement GetFocusedElement(IUIElement focusScope)
{
if (!focusScope.DependencyProperties.ContainsKey(FocusManager.FocusedElementProperty))
{
return null;
}
return focusScope.GetValue<UIElement>(FocusManager.FocusedElementProperty);
}
/// <summary>
/// Sets the focused <see cref="UIElement"/> within the specified focus scope
/// </summary>
/// <param name="focusScope">The <see cref="IUIElement"/> that represents the scope for which to set the focused element</param>
/// <param name="focusedElement">The <see cref="UIElement"/> to set the focus to</param>
public static void SetFocusedElement(IUIElement focusScope, UIElement focusedElement)
{
UIElement toUnfocus;
if (!focusScope.DependencyProperties.ContainsKey(FocusManager.FocusedElementProperty))
{
FocusManager.AppendFocusProperties(focusScope);
}
toUnfocus = focusScope.GetValue<UIElement>(FocusManager.FocusedElementProperty);
if(toUnfocus != null)
{
toUnfocus.Unfocus();
}
focusScope.SetValue(FocusManager.FocusedElementProperty, focusedElement);
focusedElement.Focus();
}
/// <summary>
/// Gets a list of all the focusable <see cref="UIElement"/> contained within the specified focus scope
/// </summary>
/// <param name="focusScope">The focus scope <see cref="IUIElement"/></param>
/// <returns>A list of all the focusable <see cref="UIElement"/> contained within the specified focus scope</returns>
public static HashSet<UIElement> GetFocusableElements(IUIElement focusScope)
{
if (!focusScope.DependencyProperties.ContainsKey(FocusManager.FocusableElementsProperty))
{
return null;
}
return focusScope.GetValue<HashSet<UIElement>>(FocusManager.FocusableElementsProperty);
}
