/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef LAYOUTDECORATION_H
#define LAYOUTDECORATION_H

#include <QtDesigner/extension.h>

#include <QtCore/QObject>
#include <QtCore/QPair>

QT_BEGIN_HEADER

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, "com.trolltech.Qt.Designer.LayoutDecoration")

QT_END_HEADER

#endif // LAYOUTDECORATION_H
