text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the Qt Designer of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:GPL-EXCEPT$
  ** 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
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 3 as published by the Free Software
  ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef LAYOUTDECORATION_H
  #define LAYOUTDECORATION_H
  
  #include <QtDesigner/extension.h>
  
  #include <QtCore/QObject>
  #include <QtCore/QPair>
  
  QT_BEGIN_NAMESPACE
  
  class QPoint;
  class QLayoutItem;
  class QWidget;
  class QRect;
  class QLayout;
  
  class QDesignerLayoutDecorationExtension
  {
  public:
      enum InsertMode
      {
          InsertWidgetMode,
          InsertRowMode,
          InsertColumnMode
      };
  
      virtual ~QDesignerLayoutDecorationExtension() {}
  
      virtual QList<QWidget*> widgets(QLayout *layout) const = 0;
  
      virtual QRect itemInfo(int index) const = 0;
      virtual int indexOf(QWidget *widget) const = 0;
      virtual int indexOf(QLayoutItem *item) const = 0;
  
      virtual InsertMode currentInsertMode() const = 0;
      virtual int currentIndex() const = 0;
      virtual QPair<int, int> currentCell() const = 0;
      virtual void insertWidget(QWidget *widget, const QPair<int, int> &cell) = 0;
      virtual void removeWidget(QWidget *widget) = 0;
  
      virtual void insertRow(int row) = 0;
      virtual void insertColumn(int column) = 0;
      virtual void simplify() = 0;
  
      virtual int findItemAt(const QPoint &pos) const = 0;
      virtual int findItemAt(int row, int column) const = 0; // atm only for grid.
  
      virtual void adjustIndicator(const QPoint &pos, int index) = 0;
  };
  Q_DECLARE_EXTENSION_INTERFACE(QDesignerLayoutDecorationExtension, "org.qt-project.Qt.Designer.LayoutDecoration")
  
  QT_END_NAMESPACE
  
  #endif // LAYOUTDECORATION_H
  