Long live Qt 4.5!

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diff --git a/tools/designer/src/lib/shared/actionprovider_p.h b/tools/designer/src/lib/shared/actionprovider_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef ACTIONPROVIDER_H
+#define ACTIONPROVIDER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtDesigner/extension.h>
+#include <QtCore/QPoint>
+#include <QtCore/QRect>
+#include <QtGui/QApplication>
+
+QT_BEGIN_NAMESPACE
+
+class QAction;
+
+class QDesignerActionProviderExtension
+{
+public:
+    virtual ~QDesignerActionProviderExtension() {}
+
+    virtual QRect actionGeometry(QAction *action) const = 0;
+    virtual QAction *actionAt(const QPoint &pos) const = 0;
+
+    virtual void adjustIndicator(const QPoint &pos) = 0;
+};
+
+// Find action at the given position for a widget that has actionGeometry() (QToolBar,
+// QMenuBar, QMenu). They usually have actionAt(), but that fails since Designer usually sets
+// WA_TransparentForMouseEvents on the widgets.
+template <class Widget>
+    int actionIndexAt(const Widget *w, const QPoint &pos, Qt::Orientation orientation)
+{
+    const QList<QAction*> actions = w->actions();
+    const int actionCount = actions.count();
+    if (actionCount == 0)
+        return -1;
+    // actionGeometry() can be wrong sometimes; it returns a geometry that
+    // stretches to the end of the toolbar/menu bar. So, check from the beginning
+    // in the case of a horizontal right-to-left orientation.
+    const bool checkTopRight = orientation == Qt::Horizontal && QApplication::layoutDirection() == Qt::RightToLeft;
+    const QPoint topRight = QPoint(w->rect().width(), 0);
+    for (int index = 0; index < actionCount; ++index) {
+        QRect g = w->actionGeometry(actions.at(index));
+        if (checkTopRight)
+            g.setTopRight(topRight);
+        else
+            g.setTopLeft(QPoint(0, 0));
+
+        if (g.contains(pos))
+            return index;
+    }
+    return -1;
+}
+
+Q_DECLARE_EXTENSION_INTERFACE(QDesignerActionProviderExtension, "com.trolltech.Qt.Designer.ActionProvider")
+
+QT_END_NAMESPACE
+
+#endif // ACTIONPROVIDER_H