/// <summary>
/// Updates any UI elements.
/// </summary>
/// <returns>Whether or not we should block mouse actions when updating entities.</returns>
public bool Update()
{
foreach (var element in _elements)
{
if (element.Active && element is IUIFocusable)
{
var focusable = element as IUIFocusable;
if (focusable.Focused)
{
focusable.FocusUpdate();
}
}
}
// TODO: Check other mouse buttons.
var mouseState = Mouse.GetState();
var mousePosition = mouseState.GetPosition();
var mouseButton = mouseState.GetButtonUp(MouseButtons.LeftButton) ? MouseButtons.LeftButton : MouseButtons.None;
var e = new UIMouseEventData(mousePosition, mouseButton);
var block = false;
foreach (var element in _elements)
{
block |= UpdateHelper(element, e);
}
_elements.RemoveAll(element => element.Deleted);
return(block);
}
private bool UpdateHelper(UIElement element, UIMouseEventData e)
{
var block = false;
if (element.Active && !element.Deleted)
{
if (element is IUIClickable)
{
var clickable = element as IUIClickable;
if (clickable.CheckMouseOver(e.Position))
{
clickable.MousedOver = true;
block = clickable.MouseOver(e);
}
else
{
if (clickable.MousedOver)
{
clickable.MouseOut(e);
}
clickable.MousedOver = false;
}
if (e.Button == MouseButtons.LeftButton && clickable.CheckReleased(e))
{
clickable.Click(e);
}
}
if (element is IUIFocusable)
{
var focusable = element as IUIFocusable;
if (focusable.Focused)
{
focusable.FocusUpdate();
}
}
}
foreach (var child in element.Children)
{
block |= UpdateHelper(child, e);
}
return(block);
}