public void FocusFirstElement()
{
var firstElement = _interactableElements.FirstOrDefault();
if (firstElement == CurrentElement)
{
return;
}
CurrentElement?.Unfocus();
_elementToGetFocus = firstElement;
}
public void ControllerOnMoveToPreviousElement()
{
var lastElement = CurrentElement;
if (CurrentElement == null)
{
CurrentElement = _interactableElements.FirstOrDefault();
}
else
{
var index = _interactableElements.IndexOf(CurrentElement);
CurrentElement = index == 0 ? _interactableElements[_interactableElements.Count - 1] : _interactableElements[index - 1];
}
if (lastElement != CurrentElement)
{
lastElement?.Unfocus();
CurrentElement?.Focus();
}
}
public virtual void Update(GameTime gameTime)
{
if (_rearrangeList)
{
_interactableElements.RemoveAll(e => !e.IsInteractable);
_interactableElements.Sort((e1, e2) => e1.TabIndex.CompareTo(e2.TabIndex));
}
foreach (var inputController in InputControllers)
{
inputController.Update(this);
}
if (_elementToGetFocus != null && _elementToGetFocus.State == UiState.Active)
{
_elementToGetFocus.Focus();
CurrentElement = _elementToGetFocus;
_elementToGetFocus = null;
}
}
private void ControllerOnMoveToNextElement()
{
var lastElement = CurrentElement;
if (CurrentElement == null)
{
CurrentElement = _interactableElements.FirstOrDefault();
}
else
{
var index = _interactableElements.IndexOf(CurrentElement);
CurrentElement = index == _interactableElements.Count - 1 ? _interactableElements[0] : _interactableElements[index + 1];
}
if (lastElement != CurrentElement)
{
lastElement?.Unfocus();
CurrentElement?.Focus();
}
}
protected void AddUiElement(UiElement element)
{
_interactableElements.Add(element);
_rearrangeList = true;
}
public UiFocusContainer()
{
_interactableElements = new List <UiElement>();
InputControllers = new List <OverlayInputController>();
CurrentElement = null;
}
private void ControllerOnOnAction(UiElement uiElement)
{
CurrentElement?.OnAction();
}
protected void RemoveChild(UiElement element)
{
_children.Remove(element);
}
/// <summary>
/// Adds a child control to compound element.
/// </summary>
/// <param name="element"></param>
protected void AddChildElement(UiElement element)
{
_children.Add(element);
}
protected void InvokeAction(UiElement element)
{
OnAction?.Invoke(element);
}