Extract QGuiAction(Group) from QAction(Group) into QtGui

Simply moving QAction to QtGui was not deemed possible since
it operates on a set of controls of some kind. The approach to
extract a base class was taken instead, named QGuiAction
following the QGuiApplication scheme. QAction remains in
widgets, but changes base class.

For QActionGroup, the functions addAction(text/icon), which
create an action, cannot be implemented in QtGui, hence a base
class is needed, too (unless they are deprecated and removed).

- Extract base classes providing functionality not based on
  QtWidgets, using virtuals in QGuiActionPrivate to provide
  customization points

- Change QActionEvent to take QGuiAction, removing
  the need to forward declare QAction in QtGui

[ChangeLog][QtGui] Added QGuiAction(Group) and made the equivalent
existing classes in Qt Widgets derive from them. This provides
basic functionality for implementing actions in QML.

Task-number: QTBUG-69478
Change-Id: Ic490a5e3470939ee8af612d46ff41d4c8c91fbdf
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/widgets/widgets/qtoolbar.cpp b/src/widgets/widgets/qtoolbar.cpp
index 58e9c4fd87..4b821f7e41 100644
--- a/src/widgets/widgets/qtoolbar.cpp
+++ b/src/widgets/widgets/qtoolbar.cpp
@@ -961,7 +961,7 @@ QAction *QToolBar::actionAt(const QPoint &p) const
 void QToolBar::actionEvent(QActionEvent *event)
 {
     Q_D(QToolBar);
-    QAction *action = event->action();
+    auto action = static_cast<QAction *>(event->action());
     QWidgetAction *widgetAction = qobject_cast<QWidgetAction *>(action);
 
     switch (event->type()) {