text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtWidgets module 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 The Qt Company. For licensing terms
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  ** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
  ** Public license version 3 or any later version approved by the KDE Free
  ** Qt Foundation. The licenses are as published by the Free Software
  ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
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  ****************************************************************************/
  
  #ifndef QSTACKEDLAYOUT_H
  #define QSTACKEDLAYOUT_H
  
  #include <QtWidgets/qtwidgetsglobal.h>
  #include <QtWidgets/qlayout.h>
  
  QT_BEGIN_NAMESPACE
  
  
  class QStackedLayoutPrivate;
  
  class Q_WIDGETS_EXPORT QStackedLayout : public QLayout
  {
      Q_OBJECT
      Q_DECLARE_PRIVATE(QStackedLayout)
      Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentChanged)
      Q_PROPERTY(StackingMode stackingMode READ stackingMode WRITE setStackingMode)
      QDOC_PROPERTY(int count READ count)
  
  public:
      enum StackingMode {
          StackOne,
          StackAll
      };
      Q_ENUM(StackingMode)
  
      QStackedLayout();
      explicit QStackedLayout(QWidget *parent);
      explicit QStackedLayout(QLayout *parentLayout);
      ~QStackedLayout();
  
      int addWidget(QWidget *w);
      int insertWidget(int index, QWidget *w);
  
      QWidget *currentWidget() const;
      int currentIndex() const;
      using QLayout::widget;
      QWidget *widget(int) const;
      int count() const override;
  
      StackingMode stackingMode() const;
      void setStackingMode(StackingMode stackingMode);
  
      // abstract virtual functions:
      void addItem(QLayoutItem *item) override;
      QSize sizeHint() const override;
      QSize minimumSize() const override;
      QLayoutItem *itemAt(int) const override;
      QLayoutItem *takeAt(int) override;
      void setGeometry(const QRect &rect) override;
      bool hasHeightForWidth() const override;
      int heightForWidth(int width) const override;
  
  Q_SIGNALS:
      void widgetRemoved(int index);
      void currentChanged(int index);
  
  public Q_SLOTS:
      void setCurrentIndex(int index);
      void setCurrentWidget(QWidget *w);
  
  private:
      Q_DISABLE_COPY(QStackedLayout)
  };
  
  QT_END_NAMESPACE
  
  #endif // QSTACKEDLAYOUT_H
  