public static void Focus( UIElement element )
{
if( !element.Focus() )
{
element.Dispatcher.BeginInvoke( DispatcherPriority.Input, new ThreadStart( delegate() {
element.Focus();
} ));
}
}
/// <summary>
/// On current visual changed, change focus as desired
/// </summary>
private void FocusCurrentVisual()
{
System.Windows.UIElement element = CurrentVisual as System.Windows.UIElement;
if (element == null)
{
return;
}
bool focusElement;
if (CurrentNavigator is SearchNavigator && CurrentVisual is SearchViewControl)
{
// Search view control implements custom focus, don't override it
focusElement = false;
}
else
{
// For anything else, focus current visual
focusElement = true;
}
if (focusElement)
{
if (!element.Focus())
{
element.MoveFocus(
new System.Windows.Input.TraversalRequest(
System.Windows.Input.FocusNavigationDirection.First
)
);
}
}
}
/// <summary>
/// Gives the focus to the given UIElement.
/// </summary>
/// <param name="element">The UIElement which has to get the focus.</param>
/// <remarks>Giving the focus will be done using the target element dispatcher with the <see cref="System.Windows.Threading.DispatcherPriority.Render" /> priority.</remarks>
public static void GiveFocus(UIElement element)
{
element.Dispatcher.BeginInvoke(new Action(delegate
{
element.Focus();
Keyboard.Focus(element);
}),
DispatcherPriority.Render);
}
private IObservable<Vector2> GetObservable(UIElement target, string eventName, UIElement relative, Func<Point, Point> translate)
{
return Observable.FromEventPattern<MouseEventArgs>(target, eventName).Select(
e =>
{
target.Focus();
return ToVector2(translate(e.EventArgs.GetPosition(relative)));
});
}
/// <summary>
/// Gives the focus to the given UIElement with a Callback.
/// </summary>
/// <param name="element">The UIElement which has to get the focus.</param>
/// <param name="actionOnFocus">The callback which will be called when the control got the focus. It will called just before the element.Focus will called and the KeyboardFocus will be set.</param>
/// <remarks>Giving the focus will be done using the target element dispatcher with the <see cref="System.Windows.Threading.DispatcherPriority.Render" /> priority.</remarks>
public static void GiveFocus(UIElement element, Action actionOnFocus)
{
element.Dispatcher.BeginInvoke(new Action(() =>
{
actionOnFocus();
element.Focus();
Keyboard.Focus(element);
}),
DispatcherPriority.Render);
}
private void PutFocus(UIElement uiElement)
{
if (ShouldUseKeyboardFocusMethod.IsChecked.GetValueOrDefault())
{
Keyboard.Focus(uiElement);
}
else
{
uiElement.Focus();
}
}
private void SetFocus(UIElement element)
{
if (element.Focusable)
{
element.Focus();
}
else
{
element.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
}
