/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt Designer of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** 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
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** file. Please review the following information to ensure the GNU General
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** $QT_END_LICENSE$
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****************************************************************************/

#ifndef LAYOUTDECORATION_H
#define LAYOUTDECORATION_H

#include <QtDesigner/extension.h>

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

QT_BEGIN_HEADER

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

QT_END_NAMESPACE

QT_END_HEADER

#endif // LAYOUTDECORATION_H