public static void Update(VisualElementRenderer renderer)
{
ElementPositions.Clear();
XnaMouseState state;
try
{
if (!Forms.Game.IsActive)
return;
state = XnaMouse.GetState();
}
catch (InvalidOperationException) { return; }
var buttonState = UpdateButtonsState(state);
var reallyOver = renderer.FlattenHierarchyReverse()
.Where(c => !c.Model.InputTransparent && c.Model.IsEnabled)
.Select(c => new ElementPosition { Element = c, Position = state.ToRelative(c) })
.Where(c => c.IsPositionInside());
var newOver = reallyOver.FirstOrDefault();
var newOverEventArgs = newOver.Element != null? new MouseEventArgs(state.ToRelative(newOver.Element)) : null;
if (newOver.Element != null)
{
foreach(var stateChange in buttonStateChange)
{
if (stateChange.Value != null)
{
if (stateChange.Value == XnaButtonState.Pressed)
{
newOver.Element.HandleRaise(
r => new MouseButtonEventArgs(stateChange.Key, state.ToRelative(r)),
(r, e) => r.InterceptMouseDown(e),
(r, e) => r.HandleMouseDown(e));
}
else
newOver.Element.HandleRaise(
r => new MouseButtonEventArgs(stateChange.Key, state.ToRelative(r)),
(r, e) => r.InterceptMouseUp(e),
(r, e) => r.HandleMouseUp(e));
}
}
}
if (_pressing == null)
{
if (newOver.Position != null)
newOver.Element.OnMouseOver(newOverEventArgs);
if (_over != newOver.Element)
{
if (_over != null)
_over.OnMouseLeave(new MouseEventArgs(state.ToRelative(_over)));
if (newOver.Element != null)
newOver.Element.OnMouseEnter(newOverEventArgs);
_over = newOver.Element;
}
if (_over != null && state.LeftButton == XnaButtonState.Pressed)
{
_pressing = _over;
}
}
else
{
var pressingEvent = new MouseEventArgs(state.ToRelative(_pressing));
_pressing.OnMouseOver(pressingEvent);
if (state.LeftButton == XnaButtonState.Released)
{
if (newOver.Element == _pressing)
{
_pressing.RaiseClick(newOverEventArgs);
_pressing = null;
}
else
{
_pressing.OnMouseLeave(pressingEvent);
_pressing = null;
if (newOver.Element != null)
newOver.Element.OnMouseEnter(newOverEventArgs);
_over = newOver.Element;
}
}
}
}
