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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef COMPLEXWIDGETS_H
+#define COMPLEXWIDGETS_H
+
+#include <QtCore/qpointer.h>
+#include <QtWidgets/qaccessiblewidget.h>
+#include <QtWidgets/qabstractitemview.h>
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_ACCESSIBILITY
+
+class QAbstractButton;
+class QHeaderView;
+class QTabBar;
+class QComboBox;
+class QTitleBar;
+class QAbstractScrollArea;
+class QScrollArea;
+
+#ifndef QT_NO_SCROLLAREA
+class QAccessibleAbstractScrollArea : public QAccessibleWidget
+{
+public:
+    explicit QAccessibleAbstractScrollArea(QWidget *widget);
+
+    enum AbstractScrollAreaElement {
+        Self = 0,
+        Viewport,
+        HorizontalContainer,
+        VerticalContainer,
+        CornerWidget,
+        Undefined
+    };
+
+    QAccessibleInterface *child(int index) const Q_DECL_OVERRIDE;
+    int childCount() const Q_DECL_OVERRIDE;
+    int indexOfChild(const QAccessibleInterface *child) const Q_DECL_OVERRIDE;
+    bool isValid() const Q_DECL_OVERRIDE;
+    QAccessibleInterface *childAt(int x, int y) const Q_DECL_OVERRIDE;
+
+//protected:
+    QAbstractScrollArea *abstractScrollArea() const;
+
+private:
+    QWidgetList accessibleChildren() const;
+    AbstractScrollAreaElement elementType(QWidget *widget) const;
+    bool isLeftToRight() const;
+};
+
+class QAccessibleScrollArea : public QAccessibleAbstractScrollArea
+{
+public:
+    explicit QAccessibleScrollArea(QWidget *widget);
+};
+#endif // QT_NO_SCROLLAREA
+
+#ifndef QT_NO_TABBAR
+class QAccessibleTabBar : public QAccessibleWidget
+{
+public:
+    explicit QAccessibleTabBar(QWidget *w);
+    ~QAccessibleTabBar();
+
+    int childCount() const Q_DECL_OVERRIDE;
+    QString text(QAccessible::Text t) const Q_DECL_OVERRIDE;
+
+    QAccessibleInterface* child(int index) const Q_DECL_OVERRIDE;
+    int indexOfChild(const QAccessibleInterface *child) const Q_DECL_OVERRIDE;
+
+protected:
+    QTabBar *tabBar() const;
+    mutable QHash<int, QAccessible::Id> m_childInterfaces;
+};
+#endif // QT_NO_TABBAR
+
+#ifndef QT_NO_COMBOBOX
+class QAccessibleComboBox : public QAccessibleWidget
+{
+public:
+    explicit QAccessibleComboBox(QWidget *w);
+
+    int childCount() const Q_DECL_OVERRIDE;
+    QAccessibleInterface *childAt(int x, int y) const Q_DECL_OVERRIDE;
+    int indexOfChild(const QAccessibleInterface *child) const Q_DECL_OVERRIDE;
+    QAccessibleInterface* child(int index) const Q_DECL_OVERRIDE;
+
+    QString text(QAccessible::Text t) const Q_DECL_OVERRIDE;
+
+    // QAccessibleActionInterface
+    QStringList actionNames() const Q_DECL_OVERRIDE;
+    QString localizedActionDescription(const QString &actionName) const Q_DECL_OVERRIDE;
+    void doAction(const QString &actionName) Q_DECL_OVERRIDE;
+    QStringList keyBindingsForAction(const QString &actionName) const Q_DECL_OVERRIDE;
+
+protected:
+    QComboBox *comboBox() const;
+};
+#endif // QT_NO_COMBOBOX
+
+#endif // QT_NO_ACCESSIBILITY
+
+QT_END_NAMESPACE
+
+#endif // COMPLEXWIDGETS_H